MCQ Questions Mechanical Engineering Refrigeration and Air Conditioning

Take a look at these MCQ Questions Refrigeration and Air Conditioning for engineering interview questions and our tips on how to answer them. If you’re applying for an engineering internship, graduate scheme or entry-level job, you’ll face at least one interview as part of an engineering employer’s recruitment process. You may be interviewed by one or more members of the HR team, senior members of the engineering team you’d be joining or a mixture of both. In this section we will study MCQ Questions Mechanical Engineering Refrigeration and Air Conditioning.

As well as questions about your reasons for applying to the role and the employer in question, engineering recruiters will be assessing your potential in the areas that is crucial to any engineering role: technical expertise. Engineers may be asked to perform feats of fantastic technical prowess, but it will be as as part of a Justice League rather than as a solo engineering super hero.

The interviewer is almost as nervous as the candidate in most interviews. You might wonder if you look confident enough, if you will hire the right person, or if you are asking the right engineering interview questions. The last question is arguably the most crucial part to worry about when you’re interviewing candidates.

MCQ Questions Mechanical Engineering Refrigeration and Air Conditioning - Set - 5

Question 1:

A refrigeration cycle operates between condenser temperature of + 27°C and evaporator temperature of- 23°C. The Cannot coefficient of performance of cycle will be
(a) 0.2
(b) 1.2
(c) 5
(d) 6

Check Answer

Correct Answer – (C)

Question 2 :

Accumulators should have adequate volume to store refrigerant charge at least
(a) 10%
(b) 25%
(c) 50%
(d) 75%

Check Answer

Correct Answer – (C)

Question 3 :

In refrigerators, the temperature difference between the evaporating refrigerant and the medium being cooled should be
(a) high, of the order of 25°
(b) as low as possible (3 to 11°C)
(c) zero
(d) any value

Check Answer

Correct Answer – (B)

Question 4 :

Condensing temperature in a refrigerator is the temperature
(a) of cooling medium
(b) of freezing zone
(c) of evaporator
(d) at which refrigerant gas becomes liquid

Check Answer

Correct Answer – (D)

Question 5 :

The value of COP in vapour compression cycle is usually
(a) always less than unity
(b) always more than unity
(c) equal to unity
(d) any one of the above

Check Answer

Correct Answer – (B)

MCQ Questions Mechanical Engineering Refrigeration and Air Conditioning

Question 6:

At lower temperatures and pressures, the latent heat of vaporisation of a refrigerant
(a) decreases
(b) increases
(c) remains same
(d) depends on other factors

Check Answer

Correct Answer – (B)

Question 7:

In a flooded evaporator refrigerator, an accumulator at suction of compressor is used to
(a) collect liquid refrigerant and prevent it from going to compressor
(b) detect liquid in vapour
(c) superheat the vapour
(d) collect vapours

Check Answer

Correct Answer – (A)

Question 8:

Formation of frost on evaporator in refrigerator
(a) results in loss of heat due to poor heat transfer
(b) increases heat transfer rate
(c) is immaterial
(d) can be avoided by proper design

Check Answer

Correct Answer – (A)

Question 9:

In a refrigeration system, heat absorbed in comparison to heat rejected is
(a) more
(b) less
(c) same
(d) more for small capacity and less for high capacity

Check Answer

Correct Answer – (B)

Question 10:

One of the purposes of sub-cooling the liquid refrigerant is to
(a) reduce compressor overheating
(b) reduce compressor discharge temperature
(c) increase cooling effect
(d) ensure that only liquid and not the vapour enters the expansion (throttling) valve

Check Answer

Correct Answer – (D)

MCQ Questions Mechanical Engineering Refrigeration and Air Conditioning

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