{"id":6321,"date":"2017-08-18T14:30:09","date_gmt":"2017-08-18T18:30:09","guid":{"rendered":"https:\/\/practiceppeexams.ca\/?page_id=6321"},"modified":"2024-04-04T12:02:27","modified_gmt":"2024-04-04T16:02:27","slug":"applied-thermodynamics-and-heat-transfer-mec-a1","status":"publish","type":"page","link":"https:\/\/practiceppeexams.ca\/technical-exams\/mechanical\/applied-thermodynamics-and-heat-transfer-mec-a1\/","title":{"rendered":"Applied Thermodynamics &#038; Heat Transfer (Mec-A1)"},"content":{"rendered":"\n\n<h1><strong>Applied Thermodynamics &amp; Heat Transfer (Mec-A1) &#8211; Solutions<\/strong><\/h1>\n<p><em>Your credible resource for help with your mechanical exams.<\/em><\/p>\n\t<p>Your exam is fast approaching. \u00a0You might be working a job and have a family that needs your time.<\/p>\n<p>If that sounds like you, our <strong>Applied Thermodynamics &amp; Heat Transfer (Mec-A1)<\/strong><strong>\u00a0<\/strong>help is for you.<\/p>\n\t\t\t\t\t\t<h2>Exam Basics<\/h2>\n\t\t\t<p><strong>About:<\/strong> The <strong>Applied Thermodynamics &amp; Heat Transfer exam<\/strong> is written nationally for aspiring mechanical engineers and a few other disciplines. \u00a0The code for this exam is:<\/p>\n<ul>\n<li>Mechanical &#8211; <strong>16-Mec-A1<\/strong>\u00a0(or you may see it like YY-Mec-A1,07-Mec-A1, Mec-A1)<\/li>\n<li>Engineering Physics \u00a0&#8211; Phys-B6<\/li>\n<li>Marine Engineering \u00a0&#8211; Mar-A1<\/li>\n<li>Naval Architectural &#8211;\u00a0Nav-B1<\/li>\n<li>Mechatronics &#8211;\u00a0Mex-A4<\/li>\n<\/ul>\n<p>The exam tests candidate&#8217;s understanding of thermodynamics (laws &amp; cycles) and heat transfer (applications and analysis).<\/p>\n<p><strong>Format:<\/strong> 3-hour long, open book exam.\u00a0Out of the eight questions that are asked in the exam, only five need to be attempted; 2 from part A and 3 from part B, or vice versa.\u00a0<\/p>\n<p><strong>Dates written:<\/strong> The exam is offered twice every year in the months of May and December.<\/p>\n<p><strong>Approved aids:<\/strong> Since the course is highly computational, any non-communicating calculator is\u00a0permitted.\u00a0<\/p>\n\t\t\t\t\t\t<h2>Strategy for Exam Questions<\/h2>\n\t\t\t<div class=\"fl-builder-content fl-builder-content-6702 fl-builder-template fl-builder-row-template fl-builder-global-templates-locked\" data-post-id=\"6702\"><div class=\"fl-row fl-row-fixed-width fl-row-bg-none fl-node-59b27d358ac7b fl-row-default-height fl-row-align-center\" data-node=\"59b27d358ac7b\">\n\t<div class=\"fl-row-content-wrap\">\n\t\t\t\t\t\t\t\t<div class=\"fl-row-content fl-row-fixed-width fl-node-content\">\n\t\t\n<div class=\"fl-col-group fl-node-59b27d358ab8c\" data-node=\"59b27d358ab8c\">\n\t\t\t<div class=\"fl-col fl-node-59b27d358abcb\" data-node=\"59b27d358abcb\">\n\t<div class=\"fl-col-content fl-node-content\"><div class=\"fl-module fl-module-rich-text fl-node-59b27d358ac41\" data-node=\"59b27d358ac41\">\n\t<div class=\"fl-module-content fl-node-content\">\n\t\t<div class=\"fl-rich-text\">\n\t<p>After reviewing several previous exams, a pattern in the questions emerges. \u00a0Here is a summary of the different question types.<\/p>\n<p>&nbsp;<\/p>\n<p>Mechanical-A1 Applied Thermodynamics and Heat Transfer contains two parts in question paper thermodynamics and heat transfer. In this article, I\u2019m going to tell you what those are and then I\u2019ll explain how to approach each type.<\/p>\n<\/div>\n\t<\/div>\n<\/div>\n<div class=\"fl-module fl-module-advanced-accordion fl-node-59b27d358ac06\" data-node=\"59b27d358ac06\">\n\t<div class=\"fl-module-content fl-node-content\">\n\t\t\n<div class=\"uabb-module-content uabb-adv-accordion \n\t\t\t\t\t\tuabb-adv-accordion-collapse\" data-enable_first=\"no\" role=\"tablist\" >\n\t\t<div class=\"uabb-adv-accordion-item\"\n\t\t\tdata-index=\"0\">\n\t\t<div class=\"uabb-adv-accordion-button uabb-adv-accordion-button59b27d358ac06 uabb-adv-before-text\" aria-selected=\"false\" role=\"tab\" tabindex=\"0\" aria-expanded=\"true\" aria-controls=\"expandable\">\n\t\t\t<div class=\"uabb-adv-accordion-icon-wrap\" ><i class=\"uabb-adv-accordion-button-icon fa fa-plus\"><\/i><\/div>\t\t\t<h4 class=\"uabb-adv-accordion-button-label\" >Part A \u2013 Thermodynamics<\/h4>\n\t\t\t\t\t<\/div>\n\t\t<div class=\"uabb-adv-accordion-content uabb-adv-accordion-content59b27d358ac06 fl-clearfix uabb-accordion-desc uabb-text-editor\" aria-expanded=\"true\" >\n\t\t\t<p>\u00a0<\/p>\n<h2><strong>Part A \u2013 Thermodynamics<\/strong><\/h2>\n<ol>\n<li><strong>Heat Exchanger<\/strong><strong> \u2013 <\/strong>This question tests your knowledge of heat transfer through devices called exchangers. You may be\u00a0asked to calculate temperature difference calculations, logarithmic mean temperature difference (LMTD) method, or overall heat transfer coefficient, etc. <span style=\"color: #000000;\">The heat loss by the hot fluid is completely gained by the cold fluid. <\/span>You have to examine the minute area of contact between two surfaces thereby you can estimate exact heat transfer.<\/li>\n<\/ol>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-6663 size-full\" src=\"https:\/\/practiceppeexams.ca\/wp-content\/uploads\/WINWORD_2017-09-07_12-48-33.png\" alt=\"\" width=\"315\" height=\"109\" srcset=\"https:\/\/practiceppeexams.ca\/wp-content\/uploads\/WINWORD_2017-09-07_12-48-33.png 315w, https:\/\/practiceppeexams.ca\/wp-content\/uploads\/WINWORD_2017-09-07_12-48-33-300x104.png 300w\" sizes=\"(max-width: 315px) 100vw, 315px\" \/><\/p>\n<p>\u00a0<\/p>\n<ol start=\"2\">\n<li><strong>Reciprocating Air Compressors<\/strong><strong> - <\/strong>The reciprocating compressors use a piston cylinder mechanism to increase the pressure for the air delivery. These questions verify your knowledge levels in thermodynamics areas relating to pressure, volume and temperature. You may be asked to calculate the induced power required to drive the compressor. You can consider the mean effective pressure which is theoretical. You may neglect some frictional losses.<\/li>\n<\/ol>\n<p><strong>\u00a0<img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-6664 size-full\" src=\"https:\/\/practiceppeexams.ca\/wp-content\/uploads\/WINWORD_2017-09-07_12-49-48.png\" alt=\"\" width=\"346\" height=\"87\" srcset=\"https:\/\/practiceppeexams.ca\/wp-content\/uploads\/WINWORD_2017-09-07_12-49-48.png 346w, https:\/\/practiceppeexams.ca\/wp-content\/uploads\/WINWORD_2017-09-07_12-49-48-300x75.png 300w\" sizes=\"(max-width: 346px) 100vw, 346px\" \/><\/strong><\/p>\n<p>\u00a0<\/p>\n<ol start=\"3\">\n<li><strong>Reheat and Regenerative Cycle<\/strong> \u2013 Reheat and regenerative are the thermodynamic process. These kinds of questions measure your ability on problem-solving of boiler furnace process, that means heating and cooling air or water. In reheat cycle, the process starts with steam. \u00a0It is extracted in the turbine. When it becomes wet, it is reheated with the help of flue gases which are in the boiler. The main purpose is to increase the efficiency of the turbine. You need to calculate the mass flow rate of the steam when the turbine power is megawatts. You may also have to calculate pump power and finally verify with the efficiency of reheat.<\/li>\n<\/ol>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-6666 aligncenter\" src=\"https:\/\/practiceppeexams.ca\/wp-content\/uploads\/WINWORD_2017-09-07_12-51-22.png\" alt=\"\" width=\"211\" height=\"31\" \/><\/p>\n<p>\u00a0<\/p>\n<ol start=\"4\">\n<li><strong>Gas Turbine Engine Cycle \u2013 <\/strong>These questions test\u00a0your knowledge on the gas turbine engine cycle as this runs with open Brayton cycle. \u00a0So, you'll need to be familiar with the Brayton cycle process. \u00a0You will be asked to calculate the power output of the turbine from the input, minimum temperature and power required to drive the electric generator. This kind of cycle is generally used for aircraft engines. You will be asked to calculate fraction output and efficiency of the turbine to drive the compressor, the mass flow rate and volumetric flow rate of air entering into the compressor. Temperature and pressure points at entry will be given in the problem.<\/li>\n<\/ol>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-6667 aligncenter\" src=\"https:\/\/practiceppeexams.ca\/wp-content\/uploads\/WINWORD_2017-09-07_12-52-34.png\" alt=\"\" width=\"267\" height=\"32\" \/><\/p>\n<p>\u00a0<\/p>\n<ol start=\"5\">\n<li><strong>Vapour Compression Refrigeration System \u2013 <\/strong>This is based on the refrigeration cycle. You need to be familiar with the whole refrigeration cycle and process of cooling, heating as well as refrigerant propertie<span style=\"color: #000000;\">s. In these questions, different refrigerants may use and those properties will be given under a special table supplied for you at the<\/span> back of the exam. Generally, Freon 12 will be used as the refrigerant and properties need to be verified using the steam tables. You need to calculate the power required to the drive compressor, capacity of the refrigerator in tons and finally the coefficient of performance (COP).<\/li>\n<\/ol>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-6668 aligncenter\" src=\"https:\/\/practiceppeexams.ca\/wp-content\/uploads\/WINWORD_2017-09-07_12-53-34.png\" alt=\"\" width=\"223\" height=\"50\" \/><\/p>\n<p>\u00a0<\/p>\n<ol start=\"6\">\n<li><strong>Thermodynamic Process - <\/strong>This question relates to the basic thermodynamic process. You need to calculate the efficiency for each thermodynamic process that includes the gas constant and specific heat terminologies. Sometimes, you need to derive the efficiency expression for various thermodynamic processes and you may need to calculate pressure and temperature at different phases. These type of questions deal with general knowledge in calculating the thermodynamic relations between pressure, volume and temperature.<\/li>\n<\/ol>\n<p><strong>\u00a0<\/strong><\/p>\n<ol start=\"7\">\n<li><strong>Supersaturated or Meta stable Flow through Nozzle \u2013<\/strong> Flow through nozzles problems always relates to turbine, boiler furnaces, compressors, etc. This type question examines your ability in calculating supersaturated or meta stable flow through the nozzle. You'll need to examine the pressure changes at each phase. You may be asked to calculate the temperature of steam and the pressure of steam at any stages based on the initial parameters. You are required to know how to calculate the velocity of steam at the end of the expansion, which will be<\/li>\n<\/ol>\n<p><strong>\u00a0<img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-6669 size-full\" src=\"https:\/\/practiceppeexams.ca\/wp-content\/uploads\/WINWORD_2017-09-07_12-54-21.png\" alt=\"\" width=\"337\" height=\"70\" srcset=\"https:\/\/practiceppeexams.ca\/wp-content\/uploads\/WINWORD_2017-09-07_12-54-21.png 337w, https:\/\/practiceppeexams.ca\/wp-content\/uploads\/WINWORD_2017-09-07_12-54-21-300x62.png 300w\" sizes=\"(max-width: 337px) 100vw, 337px\" \/><\/strong><\/p>\n<p><strong>\u00a0<\/strong><\/p>\n<ol start=\"8\">\n<li><strong>Compression Ignition Engine (Diesel Engine) \u2013 <\/strong>These types of questions belong to heat engines which work under a compression ignition cycle called the diesel engine cycle. You need to calculate pressure temperature at each point in the cycle\u2013 this can be calculated from the given parameters in the question such as the air that enters the engine with P1 and T1. Those values will be given to you in the question. This kind of calculation checks your knowledge on the thermodynamic relations in the diesel cycle. You need to calculate the efficiency of the cycle that can be found by taking the work done and dividing it by the heat absorbed.<\/li>\n<\/ol>\n<p><strong>\u00a0<\/strong><\/p>\n<ol start=\"9\">\n<li><strong>Rankine Cycle<\/strong> - The Rankine cycle deals in depth of thermodynamics relation similar<span style=\"color: #000000;\"> to the gas turbine cycle. You will be asked to map the entire process of the turbine cycle. You need to familiar with all the type of stages during the cycle. Typically, you need to calculate the efficiency of Rankine cycle process\u2013 y<\/span><span style=\"color: #ff0000;\"><span style=\"color: #000000;\">ou can neglect the pump work (optional) since pump work is a small portion of energy in equations. Later at the final stages of your calculations, you are required to calculate the thermal efficiency of the Rankine cycle. You need to draw a\u00a0Temperature-Entropy diagram at each phase and are required to calculate the net-work done of the steam.<\/span> <\/span><\/li>\n<\/ol>\n<p>\u00a0<\/p>\n<ol start=\"10\">\n<li><strong>Pressure Calculation in Cylinders - <\/strong>The question tests your knowledge about calculating thermodynamic calculations using single or Multi cylinders formula. You will be asked to calculate pressure in cylinder B based on the existing cylinder pressure A. You need to use continuity equation and find the areas of two cylinders. You need to use the universal gas constant and the Adiabatic index equation. It is based on variable area process using continuity equation P1V1 = P2V2 (Based on Fluid motion) for multi cylinder.<\/li>\n<\/ol>\n<p style=\"text-align: center;\">You can find the Gas pressure at cylinder B. Using heat supply equation (Q)<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-6670 aligncenter\" src=\"https:\/\/practiceppeexams.ca\/wp-content\/uploads\/WINWORD_2017-09-07_12-55-32.png\" alt=\"\" width=\"183\" height=\"34\" \/><\/p>\n<p style=\"text-align: center;\">You can get the equation in form of P2; Substitute the equation in continuity equation. So you can find the pressure.<\/p>\n<p>\u00a0<\/p>\n<ol start=\"11\">\n<li><strong>Steady and Unsteady State Heat Exchangers - <\/strong>This question is typically numerical and tests your knowledge in the Fourier law of conductions. This question mainly checks your analysis skills in selecting a design. The temperature at each point of the body varies with the position but not with time. \u00a0Each point of the body remains constant in course of time. You need to calculate the amount of heat released and need to finalize the possible thickness for the nozzle that can withstand temperatures as high as possible. \u00a0Use the\u00a0formulas:<\/li>\n<\/ol>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-6671 size-full\" src=\"https:\/\/practiceppeexams.ca\/wp-content\/uploads\/WINWORD_2017-09-07_12-56-37.png\" alt=\"\" width=\"187\" height=\"24\" \/><\/p>\n<p style=\"text-align: center;\">The fourier law of conduction (Q)<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-6672 aligncenter\" src=\"https:\/\/practiceppeexams.ca\/wp-content\/uploads\/WINWORD_2017-09-07_12-57-15.png\" alt=\"\" width=\"206\" height=\"34\" \/><\/p>\n<p>\u00a0<\/p>\n<ol start=\"12\">\n<li><strong>Work done by piston calculation in cylinders \u2013 <\/strong>These questions consists of both Thermodynamic and Refrigeration formulas. You will be asked to calculate System Work Done by the compressor. Since the process is isothermal Process Heat Supplied is equal to work done. In order to get the solution, you will be asked about heat calculation Integrating between pressure and temperature or work done by pressure and volume.<\/li>\n<\/ol>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-6673 size-full\" src=\"https:\/\/practiceppeexams.ca\/wp-content\/uploads\/WINWORD_2017-09-07_12-58-16.png\" alt=\"\" width=\"383\" height=\"39\" srcset=\"https:\/\/practiceppeexams.ca\/wp-content\/uploads\/WINWORD_2017-09-07_12-58-16.png 383w, https:\/\/practiceppeexams.ca\/wp-content\/uploads\/WINWORD_2017-09-07_12-58-16-300x31.png 300w\" sizes=\"(max-width: 383px) 100vw, 383px\" \/><\/p>\n\t\t<\/div>\n\t<\/div>\n\t\t<div class=\"uabb-adv-accordion-item\"\n\t\t\tdata-index=\"1\">\n\t\t<div class=\"uabb-adv-accordion-button uabb-adv-accordion-button59b27d358ac06 uabb-adv-before-text\" aria-selected=\"false\" role=\"tab\" tabindex=\"0\" aria-expanded=\"true\" aria-controls=\"expandable\">\n\t\t\t<div class=\"uabb-adv-accordion-icon-wrap\" ><i class=\"uabb-adv-accordion-button-icon fa fa-plus\"><\/i><\/div>\t\t\t<h4 class=\"uabb-adv-accordion-button-label\" >Part B- Heat Transfer<\/h4>\n\t\t\t\t\t<\/div>\n\t\t<div class=\"uabb-adv-accordion-content uabb-adv-accordion-content59b27d358ac06 fl-clearfix uabb-accordion-desc uabb-text-editor\" aria-expanded=\"true\" >\n\t\t\t<h2><strong><u>Part B- Heat Transfer<\/u><\/strong><\/h2>\n<ol start=\"13\">\n<li><strong>Combined Conduction and Convection Heat Transfer - <\/strong>The combination of conduction and convection heat transfer checks your knowledge skills in heat flow between various mediums as it examines your capabilities in designing heat equipment. You need to familiar with heat transfer formulas. Sometimes you may expect a\u00a0twist in the question if it includes refrigeration formulas. You may expect air condition problems where you need to calculate minimum thickness of the composite window that is needed to ensure that the temperature of the outside surface is some amount of degrees.<\/li>\n<\/ol>\n<p style=\"text-align: center;\">The hot fluid temprature (T<sub>i<\/sub>) is separated by the layers of solids from a cold fluid at temp (T<sub>o<\/sub>).<\/p>\n<p style=\"text-align: center;\">The steady state heat flow through the system.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-6674 size-full\" src=\"https:\/\/practiceppeexams.ca\/wp-content\/uploads\/WINWORD_2017-09-07_12-59-16.png\" alt=\"\" width=\"460\" height=\"34\" srcset=\"https:\/\/practiceppeexams.ca\/wp-content\/uploads\/WINWORD_2017-09-07_12-59-16.png 460w, https:\/\/practiceppeexams.ca\/wp-content\/uploads\/WINWORD_2017-09-07_12-59-16-300x22.png 300w\" sizes=\"(max-width: 460px) 100vw, 460px\" \/><\/p>\n<p><strong>\u00a0<\/strong><\/p>\n<ol start=\"14\">\n<li><strong>Convection problem \u2013 <\/strong>These type of question specifically tests your skills on convection heat transfer problems. As the conductivity of the most fluid is much slower than heat transfer from the moving fluid to the solid wall surface, it will take place in convection. You need to calculate the rate of heat transfer by using the below equation and temperature at the exit of the tube.<\/li>\n<\/ol>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-6675 size-full aligncenter\" src=\"https:\/\/practiceppeexams.ca\/wp-content\/uploads\/WINWORD_2017-09-07_13-00-25.png\" alt=\"\" width=\"374\" height=\"76\" srcset=\"https:\/\/practiceppeexams.ca\/wp-content\/uploads\/WINWORD_2017-09-07_13-00-25.png 374w, https:\/\/practiceppeexams.ca\/wp-content\/uploads\/WINWORD_2017-09-07_13-00-25-300x61.png 300w\" sizes=\"(max-width: 374px) 100vw, 374px\" \/><\/p>\n<p>\u00a0<\/p>\n<ol start=\"15\">\n<li><strong>Based on Kirchhoff\u2019s law of radiation <\/strong><strong>\u2013<\/strong> Tests your ability in calculating heat by light rays called radiation this can be formulated by Kirchoff\u2019s law. There are already given inputs such as rectangular plate dimensions, temperature, anodized aluminium with surface emissivity. You need to calculate the temperature of the surface of the power amplifier. Use the equation:<\/li>\n<\/ol>\n<p style=\"text-align: center;\">The heat transfer between two surfaces<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-6679 size-full\" src=\"https:\/\/practiceppeexams.ca\/wp-content\/uploads\/WINWORD_2017-09-07_17-50-14.png\" alt=\"\" width=\"529\" height=\"52\" srcset=\"https:\/\/practiceppeexams.ca\/wp-content\/uploads\/WINWORD_2017-09-07_17-50-14.png 529w, https:\/\/practiceppeexams.ca\/wp-content\/uploads\/WINWORD_2017-09-07_17-50-14-300x29.png 300w\" sizes=\"(max-width: 529px) 100vw, 529px\" \/><\/p>\n<p>\u00a0<\/p>\n<ol start=\"16\">\n<li><strong>Double Pipe Heat Exchanger - <\/strong>This question is based on heat exchanger formulas. You will be given the minimal inputs to design a heat exchanger pipes. A\u00a0heat exchanger\u00a0is used to transfer heat from a hot to a cold body or between two or more fluids. The fluids may be separated by a solid wall to prevent mixing or they may be in direct contact. You need to calculate number of tubes required consistent with specific in length.<\/li>\n<\/ol>\n<p><strong>\u00a0<\/strong><\/p>\n<ol start=\"17\">\n<li><strong>Conduction of Heat through a Slab \u2013 <\/strong>These questions are heat transfer related. \u00a0It tests your knowledge in heat conduction through a slab (square cross section). You will be asked to calculate heat gained by the water when it is moving in a duct and the temperature of the water leaving the duct. Similar to heat transfer calculation you can calculate the temperature at duct outlet. The heat flow through a small elemental thickness dx of a slab under steady state condition. This equation is known as Fourier law of conduction.<\/li>\n<\/ol>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-6680 aligncenter\" src=\"https:\/\/practiceppeexams.ca\/wp-content\/uploads\/WINWORD_2017-09-07_17-56-30.png\" alt=\"\" width=\"235\" height=\"29\" \/><\/p>\n<p>\u00a0<\/p>\n<ol start=\"18\">\n<li><strong>Conduction of Heat through Hollow Cylinder - <\/strong>The question is based on conduction of heat through hollow conical cylinder. You will be asked to calculate vapour production rate and show the difference between open to ambient and insulated surface. The heat flow through cylinder is considered along radial direction only. Therefore the Fourier equation for cylinder will be (Q)<\/li>\n<\/ol>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-6681 aligncenter\" src=\"https:\/\/practiceppeexams.ca\/wp-content\/uploads\/WINWORD_2017-09-07_17-57-40.png\" alt=\"\" width=\"130\" height=\"31\" \/><\/p>\n<p style=\"text-align: center;\">Consider an elemental thickness dr at a radius r. the heat flow equation through the element dr under steady state condition will be<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-6682 aligncenter\" src=\"https:\/\/practiceppeexams.ca\/wp-content\/uploads\/WINWORD_2017-09-07_17-58-17.png\" alt=\"\" width=\"167\" height=\"32\" \/><\/p>\n<p>\u00a0<\/p>\n<ol start=\"19\">\n<li><strong>Cross Flow - Heat Exchanger (Density changes)<\/strong><strong> \u2013 <\/strong>Density change questions are numerical problem regarding cross flow heat exchanger. You will be asked to calculate the temperature of the water and air leaving the heat exchanger. Minimum inputs such as water inlet temperature and air flowing is given. The temperature of the hot and cold fluid changes along x as well as along y directions and further you need to calculate the air inlet temperature when outlet conditions are changed.<\/li>\n<\/ol>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-6683 size-full\" src=\"https:\/\/practiceppeexams.ca\/wp-content\/uploads\/WINWORD_2017-09-07_17-59-26.png\" alt=\"\" width=\"323\" height=\"24\" srcset=\"https:\/\/practiceppeexams.ca\/wp-content\/uploads\/WINWORD_2017-09-07_17-59-26.png 323w, https:\/\/practiceppeexams.ca\/wp-content\/uploads\/WINWORD_2017-09-07_17-59-26-300x22.png 300w\" sizes=\"(max-width: 323px) 100vw, 323px\" \/><\/p>\n<p>\u00a0<\/p>\n<ol start=\"20\">\n<li><strong>Heat Transfer from Insulation Cylinder \u2013 <\/strong>This question is a conduction and convection heat transfer problem. Insulation is used to reduce the heat flow. \u00a0Heat flow will go on increasing as the thickness of insulation increases. \u00a0In these kinds of\u00a0problems, you need to calculate the thickness at which the heat flow becomes max\u2013 this is known to be the critical insulation thickness. \u00a0In addition, you have to calculate the heat flow from the cylinder to the surrounding under steady state conditions (Q).<\/li>\n<\/ol>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-6684 size-full\" src=\"https:\/\/practiceppeexams.ca\/wp-content\/uploads\/WINWORD_2017-09-07_18-00-26.png\" alt=\"\" width=\"165\" height=\"68\" \/><\/p>\n<p>\u00a0<\/p>\n<ol start=\"21\">\n<li><strong>Thermo Physical Properties - <\/strong>The question examines your knowledge in thermo physical properties of materials. You'll need to be familiar with engineering materials and its properties. You need to verify the heating conditions of the material and oil. Thermo physical properties\u00a0can be simply defined as material\u00a0properties. You need to calculate the temperature of the wall. If the temperature of the wall is greater than the estimated degrees it will be treated as a failure. If it is below the expected degrees, then it is a safe design operation.<\/li>\n<\/ol>\n\t\t<\/div>\n\t<\/div>\n\t<\/div>\n\t<\/div>\n<\/div>\n<\/div>\n<\/div>\n\t<\/div>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n<\/div><div class=\"uabb-js-breakpoint\" style=\"display: none;\"><\/div>\t\t\n\t\t\t\t\t\t<h2>Your Reviewer &#038; Technical Support Helper<\/h2>\n\t\t\t<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/practiceppeexams.ca\/wp-content\/uploads\/Joydeep-Banerjee-square-150x150.webp\" alt=\"Joydeep Banerjee\" width=\"150\" height=\"150\" \/>Joydeep is a mechanical engineer that is an expert on model-based technologies. With a PhD from the University of Waterloo, he brings years of teaching experience and industry experience in model-based engineering and digital thread applications. Joydeep has taught several mechanical topics at the university level and is passionate about education. He develops textbook-like solutions by using Maple to create graphics and explain each solution step in detail.<\/p>\n\t\t\t\t\t\t<h2>Textbooks &#038; References<\/h2>\n\t\t\t<p>The recommended textbooks for this exam are:<\/p>\n<ul>\n<li><a href=\"http:\/\/amzn.to\/2hNgifB\" target=\"_blank\" rel=\"noopener\">Fundamentals of Engineering Thermodynamics<\/a> by Michael J. Moran and Howard N. Shapiro, John Wiley and Sons Incorporated<\/li>\n<li><a href=\"http:\/\/amzn.to\/2ziHH2G\" target=\"_blank\" rel=\"noopener\">Heat and Mass Transfer<\/a> by Yunus A. \u00c7engel and Afshin J. Ghajar, McGraw Hill Publishing Company Moran, M.J., H.N. Shapiro, B.R. Munson and D.P. DeWitt,<\/li>\n<li><a href=\"http:\/\/amzn.to\/2zgZFCR\" target=\"_blank\" rel=\"noopener\">Introduction to Thermal Systems Engineering: Thermodynamics, Fluid Mechanics, and Heat Transfer<\/a>. John Wiley and Sons.<\/li>\n<\/ul>\n\t\t\t\t\t\t<h2>Compare our packages<\/h2>\n\t\t\t<p>Based on your education and experience, we&#8217;ve put together a few different options to help you out. \u00a0If you are feeling confident in the material and believe you are knowledgeable on the exam topics, then a less expensive option may be best for you. \u00a0For those who need more help and support, the more expensive packages would be recommended.\u00a0<\/p>\n<p>If only one of our packages are available to you today, you may order it and then receive a credit if you would like to upgrade once the other options become available. \u00a0<\/p>\n\t<p><strong>$319, $219<\/strong><\/p>\n\t\t\t<a href=\"\/technical-exams\/mechanical\/applied-thermodynamics-and-heat-transfer-mec-a1\/#packages\" target=\"_self\" rel=\"noopener\">\n\t\t\t\t\t\t\tChoose Your Package\n\t\t\t\t\t<\/a>\n\t<p><a href=\"https:\/\/practiceppeexams.ca\/technical-exams\/mechanical\/applied-thermodynamics-and-heat-transfer-mec-a1\/get-started\/\">Or start with my free Mec-A1 solutions sample<\/a><\/p>\n\t\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/practiceppeexams.ca\/wp-content\/uploads\/mec-a1-icon.png\" alt=\"mec-a1-icon\" itemprop=\"image\" height=\"192\" width=\"192\" title=\"mec-a1-icon\" onerror=\"this.style.display='none'\"  \/>\n\t<table>\n<tbody>\n<tr>\n<td><strong>Format:<\/strong><\/td>\n<td>\u00a0\u00a0Solutions, support &amp; course<\/td>\n<\/tr>\n<tr>\n<td><strong>Skill level:<\/strong><\/td>\n<td>\u00a0\u00a0All levels<\/td>\n<\/tr>\n<tr>\n<td><strong>Language:<\/strong><\/td>\n<td>\u00a0\u00a0English<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n\t\t\t\t\t\t\t1 Exam Solved\n\t\t\t\t\t\t\t\t\t<h1>\n\t\t\t\t\t$219+tax\t\t\t\t\t\t\t\t\t\t\tCAD\n\t\t\t\t\t\t\t\t\t\t\t<\/h1>\n\t\t\t\t\t\t\t\t<ul>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<b>1 Exam solution<\/b><br \/>(Dec &#8217;19)\t\t\t\t\t\n\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<b>1 year of access<\/b>\t\t\t\t\t\n\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<br \/><br \/><br \/>\t\t\t\t\t\n\t\t\t\t\t\t<\/li>\n\t\t\t\t<\/ul>\n\t\t\t<a href=\"\/r\/mec-a1-one-solved-exam\/\" target=\"_self\" role=\"button\" aria-label=\"Get Started\" rel=\"noopener\">\n\t\t\t\t\t\t\tGet Started\n\t\t<\/a>\n\t\t\t\t\t\t\t2 Exams Solved\n\t\t\t\t\t\t\t\t\t<h1>\n\t\t\t\t\t$319+tax\t\t\t\t\t\t\t\t\t\t\tCAD\n\t\t\t\t\t\t\t\t\t\t\t<\/h1>\n\t\t\t\t\t\t\t\t<ul>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<b>2 Exam solutions<\/b><br \/>(Dec &#8217;19 &#038; May &#8217;18)\t\t\t\t\t\n\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<b>1 year of access<\/b>\t\t\t\t\t\n\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<br \/><br \/><br \/>\t\t\t\t\t\n\t\t\t\t\t\t<\/li>\n\t\t\t\t<\/ul>\n\t\t\t<a href=\"\/r\/mec-a1-two-solved-exams\/\" target=\"_self\" role=\"button\" aria-label=\"Get Started\" rel=\"noopener\">\n\t\t\t\t\t\t\tGet Started\n\t\t<\/a>\n\t\t\t<style type=\"text\/css\">.super-form:not(.super-initialized) *:not(.super-load-icon) { visibility: hidden !important; }<\/style><div id=\"super-form-25730\" style=\"margin:0px 0px 0px 0px;\" class=\"super-form super-form-25730  super-default-squared super-field-size-medium\" data-hide=\"true\" data-overlay=\"true\" data-field-size=\"medium\"><span class=\"super-load-icon\"><\/span><form tabindex=\"0\" autocomplete=\"on\" 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This text will not be visible on frontend.\t\n\t<h2>FAQs<\/h2>\n\t\t\t\t\t<a href=\"javascript:void(0);\" id=\"fl-accordion--label-0\" tabindex=\"0\" aria-controls=\"fl-accordion--panel-0\">What is your guarantee?<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"#\" id=\"fl-accordion--icon-0\" tabindex=\"-1\" aria-controls=\"fl-accordion--panel-0\"><i>Expand<\/i><\/a>\n\t\t\t\t\t<p><strong>Pass your technical exam, or you&#8217;ll receive a full refund + an additional $100.<\/strong><\/p>\n<p>If you order any of our solutions sets for a technical exam topic and don&#8217;t get 50% or higher on the next attempt, we&#8217;ll give you these\u00a0great guarantee options (<em>your choice!<\/em>):<\/p>\n<ul>\n<li dir=\"ltr\">100% full refund + $100 cash; or<\/li>\n<li dir=\"ltr\">An equivalent number of solutions to a different exam topic.<\/li>\n<\/ul>\n<p>Visit our guarantee page <a href=\"https:\/\/practiceppeexams.ca\/guarantee\/\" target=\"_blank\" rel=\"noopener\">https:\/\/practiceppeexams.ca\/guarantee\/<\/a> to learn more.<\/p>\n\t\t\t\t\t<a href=\"javascript:void(0);\" id=\"fl-accordion--label-1\" tabindex=\"0\" aria-controls=\"fl-accordion--panel-1\">Are the questions provided too?<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"#\" id=\"fl-accordion--icon-1\" tabindex=\"-1\" aria-controls=\"fl-accordion--panel-1\"><i>Expand<\/i><\/a>\n\t\t\t\t\t<p>Yes, the old exams are provided in addition to our solutions.<\/p>\n<p>The exam questions are downloadable and printable.<\/p>\n<p>The solutions are view-only in your members&#8217; page to ensure you are always comparing against the most up-to-date set.<\/p>\n\t\t\t\t\t<a href=\"javascript:void(0);\" id=\"fl-accordion--label-2\" tabindex=\"0\" aria-controls=\"fl-accordion--panel-2\">Do I need to buy the recommended textbooks for this exam?<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"#\" id=\"fl-accordion--icon-2\" tabindex=\"-1\" aria-controls=\"fl-accordion--panel-2\"><i>Expand<\/i><\/a>\n\t\t\t\t\t<p>It is a good idea and you might only need one depending on what books you already own on this topic and how comprehensive each of the recommended textbooks are.<\/p>\n<p>We don&#8217;t refer to any textbook in our solutions or course, so the textbooks remain optional but recommended.<\/p>\n<p>The textbooks will compliment what we do.\u00a0 The books will go deep into the theory as well as give you additional questions to practice.<\/p>\n\t\t\t\t\t<a href=\"javascript:void(0);\" id=\"fl-accordion--label-3\" tabindex=\"0\" aria-controls=\"fl-accordion--panel-3\">Can I access the solutions\/course from any device? Are there any special computer requirements?<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"#\" id=\"fl-accordion--icon-3\" tabindex=\"-1\" aria-controls=\"fl-accordion--panel-3\"><i>Expand<\/i><\/a>\n\t\t\t\t\t<p>Yes, you can log in from any device to access and view the solutions\/course. \u00a0A laptop or desktop size screen is recommended.<\/p>\n\t\t\t\t\t<a href=\"javascript:void(0);\" id=\"fl-accordion--label-4\" tabindex=\"0\" aria-controls=\"fl-accordion--panel-4\">Is there a limit on how many times I can view the solutions?<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"#\" id=\"fl-accordion--icon-4\" tabindex=\"-1\" aria-controls=\"fl-accordion--panel-4\"><i>Expand<\/i><\/a>\n\t\t\t\t\t<p>No. \u00a0You can view the exam solutions as much as you want as long as your\u00a0membership is active.<\/p>\n\t\t\t\t\t<a href=\"javascript:void(0);\" id=\"fl-accordion--label-5\" tabindex=\"0\" aria-controls=\"fl-accordion--panel-5\">Is there a way to extend my solutions\/course access without paying full price again?<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"#\" id=\"fl-accordion--icon-5\" tabindex=\"-1\" aria-controls=\"fl-accordion--panel-5\"><i>Expand<\/i><\/a>\n\t\t\t\t\t<p>Yes. Sometimes life throws you a curveball and you become unable to attend your exam and need to reschedule it later. Because this could happen to anyone, I will personally send you an email 1 week prior to when your access expires to offer you a 6-month renewal at a heavily discounted price. This helps us cover basic costs for things like the hosting of e-learning content and email support.<\/p>\n\t\t\t\t\t<a href=\"javascript:void(0);\" id=\"fl-accordion--label-6\" tabindex=\"0\" aria-controls=\"fl-accordion--panel-6\">Could you explain why your solutions are only viewable inside the course?<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"#\" id=\"fl-accordion--icon-6\" tabindex=\"-1\" aria-controls=\"fl-accordion--panel-6\"><i>Expand<\/i><\/a>\n\t\t\t\t\t<p>Great question.\u00a0 We use a scrolling image display tool to show you solutions to past exams.\u00a0 This is to:<\/p>\n<ul>\n<li>ensure the solutions are easy to read-we scan our consultant&#8217;s solutions that have been neatly written on paper, just like the way you will be writing it.<\/li>\n<li>ensure that you are viewing the current solution set and don&#8217;t miss any updates, corrections or clarification; and<\/li>\n<li>to respect the licence agreement we have with our consultants who have provided the solutions to us.<\/li>\n<\/ul>\n<p>You can download and print the previous exam questions-then once you have tried the solutions, you simply return to the course to compare your answers with ours.<\/p>\n\t\t\t\t\t<a href=\"javascript:void(0);\" id=\"fl-accordion--label-7\" tabindex=\"0\" aria-controls=\"fl-accordion--panel-7\">What if I need help with this topic? <\/a>\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"#\" id=\"fl-accordion--icon-7\" tabindex=\"-1\" aria-controls=\"fl-accordion--panel-7\"><i>Expand<\/i><\/a>\n\t\t\t\t\t<p>We have 1-on-1 tutoring available at an additional cost.\u00a0 It is available for purchase inside the members&#8217; area for those who have ordered 1 or 2 exam solutions.<\/p>\n\t\t\t\t\t<a href=\"javascript:void(0);\" id=\"fl-accordion--label-8\" tabindex=\"0\" aria-controls=\"fl-accordion--panel-8\">What makes your course different than other technical exam help?<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"#\" id=\"fl-accordion--icon-8\" tabindex=\"-1\" aria-controls=\"fl-accordion--panel-8\"><i>Expand<\/i><\/a>\n\t\t\t\t\t<p>What makes us different is:<\/p>\n<ul>\n<li><strong>Pass guaranteed or a full refund + an additional $100.\u00a0 <\/strong>We&#8217;re the only prep provider to provide a guarantee like this.\u00a0 We know how important it is to have solutions to complement your self-studying of the material.\u00a0 If you cannot achieve a passing mark of 50%, we don&#8217;t deserve to keep your money and we&#8217;ll give you back an additional $100 for your inconvenience.\u00a0 Learn more on our <a href=\"https:\/\/practiceppeexams.ca\/guarantee\/\" target=\"_blank\" rel=\"noopener\">guarantee page<\/a>.<\/li>\n<li><strong>It&#8217;s affordable.\u00a0 <\/strong>Since we offer support by email, it better matches your needs at about 40% less than other providers who provide live-only training.<\/li>\n<li><strong>Our reviews are public.<\/strong> &#8211; Customer Reviews are publicly available on Google Local and our Facebook page, while competitors still rely\u00a0on unverified reviews like <em>&#8220;really liked the course&#8221; &#8211; Nancy H<\/em>.\u00a0 \u00a0We have found that course providers who encourage customers to publish their reviews online make the best courses in any market. This is because the prep provider has to continually improve and update their offerings to ensure clients are happy and their improvement suggestions are integrated. It is a lot more work, but in the end, you (the aspiring professional) receive a much better learning experience.<\/li>\n<\/ul>\n\n","protected":false},"excerpt":{"rendered":"<p>Applied Thermodynamics &amp; Heat Transfer (Mec-A1) &#8211; Solutions Your credible resource for help with your mechanical exams. Your exam is fast approaching. \u00a0You might be working a job and have a family that needs your time. If that sounds like you, our Applied Thermodynamics &amp; Heat Transfer (Mec-A1)\u00a0help is for you. Exam Basics About: The [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":5440,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"footnotes":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Applied Thermodynamics &amp; Heat Transfer (Mec-A1) - Solutions &amp; Course<\/title>\n<meta name=\"description\" content=\"Writing Applied Thermodynamics &amp; Heat Transfer (Mec-A1)? 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