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Mcqs

Refrigeration & Air Conditioning Mcqs

Our 1000+ Refrigeration and Air Conditioning MCQs (Multiple Choice Questions and Answers) focus on all areas of Refrigeration and Air Conditioning covering 100+ topics. These topics are chosen from a collection of the most authoritative and best reference books on Refrigeration and Air Conditioning. One should spend 1 hour daily practicing these MCQs for 2-3 months to learn and assimilate Refrigeration and Air Conditioning subjects comprehensively. This way of systematic learning will prepare anyone easily for Refrigeration and Air Conditioning exams, contests, online tests, quizzes, MCQ-tests, viva-voce, interviews, and certifications.

 

Refrigeration and Air Conditioning Multiple Choice Questions Highlights

  • 1000+ Multiple Choice Questions & Answers (MCQs) in Refrigeration and Air Conditioning with a detailed explanation of every question.
  • These MCQs cover theoretical concepts, true-false(T/F) statements, fill-in-the-blanks and match the following style statements.
  • These MCQs also cover numerical as well as diagram-oriented MCQs.
  • These MCQs are organized chapterwise and each Chapter is further organized topicwise.
  • Every MCQ set focuses on a specific topic of a given Chapter in Refrigeration and Air Conditioning Subject.

 

Who should Practice Refrigeration and Air Conditioning MCQs?

  • Students who are preparing for college tests and exams such as mid-term tests and semester tests on Refrigeration and Air Conditioning.
  • Students who are preparing for Online/Offline Tests/Contests in Refrigeration and Air Conditioning.
  • Students who wish to sharpen their knowledge of Refrigeration and Air Conditioning subjects.
  • Anyone preparing for an Aptitude test in Refrigeration and Air Conditioning.
  • Anyone preparing for interviews (campus/off-campus interviews, walk-in interviews, and company interviews).
  • Anyone preparing for entrance examinations and other competitive examinations.
  • All - Experienced, Freshers and College / School Students.
Latest Popular
Q:

Find out the value of C.O.P. for the given values of enthalpies.
h1 = 1126.25 kJ/kg
h4 = 250.25 kJ/kg
W = 120 kJ/kg

A) 5.3 B) 6.3
C) 7.3 D) 8.3
 
Answer & Explanation Answer: C) 7.3

Explanation: Refrigerating effect = h1 ? h4 = 1126.25 ? 250.25 = 876 kJ/kg
Work = 120 kJ/kg
C.O.P. = Refrigerating effect / Work done
= 876 / 120
= 7.3.

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Category: Mechanical Engineering MCQs
Sub Category: Refrigeration & Air Conditioning Mcqs

1025
Q:

What is the main function of an expansion valve?

A) Reduce the refrigerant pressure B) Maintain high and low side pressures
C) Protect evaporator D) Control the velocity of flow of refrigerants
 
Answer & Explanation Answer: B) Maintain high and low side pressures

Explanation: Expansion valve mainly increases or decreases the flow of refrigerants, which directly affects the increase and decrease in the pressures.

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Category: Mechanical Engineering MCQs
Sub Category: Refrigeration & Air Conditioning Mcqs

464
Q:

Which of the following is not the criterion for the selection of the condenser?

A) The capacity of the condenser B) Type of refrigerant used
C) Type of cooling medium available D) Type of compressor and evaporator used
 
Answer & Explanation Answer: D) Type of compressor and evaporator used

Explanation: For the selection of the condenser, there is no effect of the type of compressor and evaporator used in the system. The capacity, type of refrigerant used, and type of cooling medium available play a crucial role in the selection.

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Category: Mechanical Engineering MCQs
Sub Category: Refrigeration & Air Conditioning Mcqs

421
Q:

The C.O.P. of reverse Carnot cycle is most strongly dependent on which of the following?

A) Evaporator temperature B) Condenser temperature
C) Specific heat D) Refrigerant
 
Answer & Explanation Answer: A) Evaporator temperature

Explanation: The C.O.P in the reverse Carnot cycle generally depends on the higher of the two temperatures, as it is located in the numerator of C.O.P equation and responsible directly for increase or decrease in C.O.P.

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Category: Mechanical Engineering MCQs
Sub Category: Refrigeration & Air Conditioning Mcqs

350
Q:

Which of the following is not an advantage of vapor compression cycle over reversed Carnot cycle?

A) It’ COP and refrigeration effect can’t be increased B) Use of expansion valve reduces the size and cost of plant
C) It is a practical cycle on which plant can be built D) Wet compression of Carnot cycle is avoided
 
Answer & Explanation Answer: A) It’ COP and refrigeration effect can’t be increased

Explanation: It’ COP and refrigeration effect can be increased by use of superheated vapor at entry of compressor. The advantages are use of expansion valve reduces the size and cost of plant, it is a practical cycle on which plant can be built and wet compression of Carnot cycle is avoided.

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Category: Mechanical Engineering MCQs
Sub Category: Refrigeration & Air Conditioning Mcqs

336
Q:

The COP of refrigerator may be improved by _________

A) decreasing the higher (T2) as well as the lower (T1) temperature B) decreasing the higher (T2) temperature and increasing the lower (T1) temperature
C) increasing the higher (T2) as well as the lower (T1) temperature D) keeping the higher (T2) temperature the same while decreasing the lower (T1) temperature
 
Answer & Explanation Answer: B) decreasing the higher (T2) temperature and increasing the lower (T1) temperature

Explanation: Not available for this question

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Category: Mechanical Engineering MCQs
Sub Category: Refrigeration & Air Conditioning Mcqs

332
Q:

If a condenser and evaporator temperatures are 250 K and 100 K respectively, then reverse Carnot C.O.P is _________

A) 5.5 B) 1.5
C) 2.5 D) 3.0
 
Answer & Explanation Answer: B) 1.5

Explanation: Not available for this question

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Category: Mechanical Engineering MCQs
Sub Category: Refrigeration & Air Conditioning Mcqs

327
Q:

During humidification process the dry bulb temperature ___________

A) increases B) decreases
C) tends to zero D) remains the same
 
Answer & Explanation Answer: D) remains the same

Explanation: During the humidification process, DBT remains the same as the increase is in specific humidity and relative humidity. As the process is vertical on chart keeping DBT constant.

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Category: Mechanical Engineering MCQs
Sub Category: Refrigeration & Air Conditioning Mcqs

321