Heat Transfer,Refrigeration and Air Conditioning MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Heat Transfer,Refrigeration and Air Conditioning, a fundamental topic in the field of Mechanical Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Heat Transfer,Refrigeration and Air Conditioning MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Heat Transfer,Refrigeration and Air Conditioning mcq questions that explore various aspects of Heat Transfer,Refrigeration and Air Conditioning problems. Each MCQ is crafted to challenge your understanding of Heat Transfer,Refrigeration and Air Conditioning principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Mechanical Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Heat Transfer,Refrigeration and Air Conditioning MCQs are your pathway to success in mastering this essential Mechanical Engineering topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Heat Transfer,Refrigeration and Air Conditioning. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Heat Transfer,Refrigeration and Air Conditioning knowledge to the test? Let's get started with our carefully curated MCQs!

Heat Transfer,Refrigeration and Air Conditioning MCQs | Page 20 of 40

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Q191.
A refrigerating system operating on reversed Brayton refrigeration cycle is used for maintaining 250 K. If the temperature at the end of constant pressure cooling is 300 K and rise in the temperature of air in the refrigerator is 50 K, then the net work of compression will be (assume air as working substance with cp = 1 kJ/kg)
Discuss
Answer: (b).50 kJ/kg
Q192.
Wet bulb temperature indicates the moisture content in air.
Discuss
Answer: (a).Agree
Q193.
A designer chooses the values of fluid flow rates and specific heats in such a manner that the heat capacities of the two fluids are equal. A hot fluid enters the counter flow heat exchanger at 100° C and leaves at 60° C. A cold fluid enters the heat exchanger at 40° C. The mean temperature difference between the two fluids is
Discuss
Answer: (a).20°C
Q194.
The inclined and non-uniformly spaced straight lines on a psychrometric chart indicates wet bulb temperature.
Discuss
Answer: (a).Agree
Q195.
In a psychrometric chart, dew point temperature lines are horizontal and non-uniformly spaced.
Discuss
Answer: (a).Correct
Q196.
If the evaporator temperature is kept constant, the coefficient of performance of a refrigeration cycle __________ with the increase in condenser temperature.
Discuss
Answer: (b).decreases
Q197.
The by-pass factor, in case of sensible cooling of air, is given by (where td1 = Dry bulb temperature of air entering the cooling coil, td2 = Dry bulb temperature of air leaving the cooling coil, and td3 = Dry bulb temperature of the cooling coil)
Discuss
Answer: (b).(tdโ‚‚ -tdโ‚ƒ)/( tdโ‚ -tdโ‚ƒ)
Q198.
The evaporator used in house-hold refrigerators is
Discuss
Answer: (a).frosting evaporator
Q199.
The drier in a refrigeration system removes moisture in the system.
Discuss
Answer: (a).Correct
Q200.
When the discharge pressure is too high in a refrigeration system, high pressure control is installed to stop the compressor.
Discuss
Answer: (a).Correct