Refrigeration and Air Conditioning Quiz | Refrigeration and Air Conditioning Short Questions and Answers

Sports GK Questions and Answers 2024 (Latest Updated)

Awards & Honours GK Questions 2024 (Latest Updated)

Questions
41 Which of the following is not a desirable property of a refrigerant
A high triiscibility with oil
B low boiling point
C good electrical conductor
D large latent heat

Answer: good electrical conductor
42 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

Answer: 5
Advertisement
Article and Schedule Quiz Start Test!
DOWNLOAD CURRENT AFFAIRS PDF FROM APP
43 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

Answer: increases
44 Accumulators should have adequate volume to store refrigerant charge at least
A 10%
B 25%
C 50%
D 75%

Answer: 50%
45 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 collect vapours
D superheat the vapour

Answer: collect liquid refrigerant and prevent it from going to compressor
46 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

Answer: as low as possible (3 to 11°C)
47 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

Answer: results in loss of heat due to poor heat transfer
48 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

Answer: at which refrigerant gas becomes liquid
49 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

Answer: less
50 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

Answer: always more than unity
51 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

Answer: ensure that only liquid and not the vapour enters the expansion (throttling) valve
52 Absorption system normally uses the following refrigerant
A Freon-11
B ammonia
C Freon-22
D C02

Answer: ammonia
53 An important characteristic of absorption system of refrigeration is
A Noisy operation
B Quiet operation
C Cooling below 0°C
D Very little power consumption

Answer: Quiet operation
54 Domestic refrigerator working on vapour compression cycle uses the following type of expansion device
A Electrically operated throttling valve
B Manually operated valve
C Thermostatic valve
D Capillary tube

Answer: Capillary tube
55 The fluids used in Electrolux refrigerator are
A Water and hydrogen
B Ammonia and hydrogen
C Ammonia, water and hydrogen
D None of these

Answer: Ammonia, water and hydrogen
56 The COP of a vapour compression plant in comparison to vapour absorption plant is
A More
B Less
C Same
D More/less depending on size of plant

Answer: More
57 In a lithium bromide absorption refrigeration system
A Lithium bromide is used as a refrigerant and water as an absorbent
B Water is used as a refrigerant and lithium bromide as an absorbent
C Ammonia is used as a refrigerant and lithium bromide as an absorbent
D None of these

Answer: Water is used as a refrigerant and lithium bromide as an absorbent
58 The bank of tubes at the back of domestic refrigerator is
A Condenser tubes
B Evaporator tubes
C Refrigerant cooling tubes
D Capillary tubes

Answer: Condenser tubes
59 The vapour compression refrigerator employs the following cycle
A Rankine
B Carnot
C Reversed Rankine
D Reversed Carnot

Answer: Reversed Carnot
60 In a refrigeration system, the expansion device is connected between the
A Compressor and condenser
B Condenser and receiver
C Receiver and evaporator
D Evaporator and compressor

Answer: Receiver and evaporator

Random GK Questions

Q. Which is NOT a central Service?
Q. Muscle fatigue is caused by the accumulation of
Q. Mahatma Gandhi’s first attempt at leading an All India struggle was his call for a satyagraha against which one of the following?
Q. The two words that were inserted by the 42nd Amendment to the Preamble of the Constitution are
Q. Deficit financing is an instrument of
Q. Who was first prime minister of India awarded with Bharat Ratna?
Assam Direct Recruitment Test Series

Teacher Eligibility Test

Assam Direct Recruitment Test Series