32.

38.

34.

38.

87.

Which of the following statements is not true?
(5) The coefficient of performance ല്‌ refrigerator 1s generally greater than one

18) The coefficient of performance of a heat pump equals the reciprocal of thermal
efficiency of an engine working with in the same temperature limits

(C) The horse power per ton of refrigeration equals 4.75 times the coefficient of
performance

(D) The refriger.... See more

33.

84.

35.

36.

87.

Which type of valve is used in a reciprocating refrigeration compressor?
(4) rotary valve (B) poppet valve
(C) ring plate (D) glob valve

The presence of frost on the cooling coils of the evaporator of a refrigeration system :
(A) increases the compressor pressure
(8) act as the insulator and decreases the heat transfer rate
(€) makes the compressor run for comparatively short durations
(D) reduce .... See more

refrigeration system
A:-Vapour compression system
B:-Liquid gas refrigeration system
C:-Vapour absorption system
D:-Dry Ice refrigeration system
Correct Answer:- Option-B

Question30:-In dry ice refrigeration system, which of the following is used to cool
the materials?

A:-Solid carbon dioxide
B:-Liquid Nitrogen
C:-Ammonia

D:-Lithium Bromide solution
Correct Answer:- Option-A

Question31:-In lithium bromide absorption refriger.... See more

absolute pressure of a given mass of a perfect gas varies directly to its absolute
temperature ?

A:-Zeroth law

B:-Boyle's law

C:-Gay-lussac law

D:-Charle's law

Correct Answer:- Option-C
Question29:-Three TR is equivalent to __ of cooling effect.

A:-10.5 KW

B:-3.5 KJ/second

(:-232.6 ।<|/)10

D:-7.5 KW

Correct Answer:- Option-A

Question30:-Which refrigeration system called as expandable refr.... See more

C:-Acid, Cold and Calcium

D:-Acid, Heat and Sodium

Correct Answer:- Option-A

Question29:-Which of the following products is consider as both by-products as well as main products

A:-Paneer

B:-Skim milk

C:-Cream

D:-Butter

Correct Answer:- Option-B

Question30:-A delicious south Indian pudding made with vermicelli, sugar, ghee, milk, nuts and raisins vermicelli is known
as

A:-Payasam
B:-Channa podo
.... See more

62.

63

64.

87.

68.

69.

The refrigeration system ೧? ೧ passenger aircraft works on reversed :
(2) Brayton Cycle (B) Atkinson cycle
{C) Ericson cycle (D) Carnot cycle

During which component of vapour compression refrigeration system, the enthalpy remains
Constant :

(ಗೆ) Evaporator (B) Compressor
(3) Throttle Valve (D) None
One tone of refrigeration is equal to :
(ಯ) 35kW B) 5kW
00 ۷ - (D) .... See more

D:-None of these
Correct Answer:- Option-B

Question78:- method is used to detect leaksin Refrigeration system.
A:-Observation
B:-Soap Bubble
C:-Water tank dipping
D:-All of these

Correct Answer:- Option-D
Question79:-Finand tube type evaporator is used in
A:-Window AC
B:-Package AC
C:-Split AC
D:-All of these
Correct Answer:- Option-D
Question80:-Direct Cool Refrigerator is also called as
A:-Conventional type Refrigerator
.... See more

B:-270-285 days
۰:240-250 ‏۰۷وا‎
‎D:-290-300 days
Correct Answer:- Option-A
Question38:-Activation of lactoperoxidase system can increase keeping quality of
A:-Pasteurized milk is enhanced to seven weeks at refrigeration
B:-Raw milk is enhanced by 7 days at refrigeration
C:-Raw milk up to 7 hours at room temperature
D:-Pasteurized milk is enhanced to seven days at refrigeration
Correct Answer:- Option-C
Question39:-The yoghurt is produced by fer.... See more

0089. Which of the following is the extensive property of the system?

010.

011,

012.

013.

014.

015.

016.

(A) Volume (8) Pressure

(C) Temperature (D) Density

In a system, neither mass nor energy is allowed to cross the boundary of the system
which is known as

(A) Isentropic system (B) Isolated system

(C) Isothermal system (D) Closed system

Unit of refrigeration is expressed in<.... See more

D:-None of these
Correct Answer:- ೦೧000

Question25:-The boiling point of water in Fahrenheit scale is
۸-08
B: 2322
सर"
D320
Correct Answer: Option-C

Question26:-The freezing point of mercury is

‎२००८‏ سيم

‎Correct Answer: Option ®
Question27:-The heat required for changing the state of any object without changing its temperature is called
‘AcSensible heat
B:-Latent heat
C-Specific heat
D-.... See more

D-None of the above
Correct Answer: Option-C
QuestionS0:-The device which divides the high pressure side and the low pressure side of a refrigerating system is known as
‘ACondenser
B:-Evaporator
CeReceiver
Expansion device
Correct Answer:- Option-D
QuestionS1:-The leakage in a refrigeration system using ammonia is detected by
‘Ac Halide torch
B:-Sulphur sticks
೦-5೦೩) and water
०-५॥ of these
Correct Answer: Option ®
Question.... See more

‘Question47:-The various processes involved in a particular thermodynamic cycle are reversible adiabatic compression, constant volume heat addition, constant pressure heat addition,
reversible adiabatic expansion and constant volume heat rejection. Identify the cycle.

AcBrayton cycle
B:-Otto cycle
ರಜ cycle
०-०८०। cycle
Correct Answer:- Option-D
Question48:-The difference in higher calorific value and lower calorific value of fuel is due to
‘.... See more

Question47:-The various processes involved in a particular thermodynamic cycle are reversible adiabatic compression, constant volume heat addition, constant pressure heat addition,
reversible adiabatic expansion and constant volume heat rejection. Identify the cycle,

AcBrayton cycle
B:-Otto cycle
C-Diesel cycle
D-Dual cycle
Correct Answer:- Option-D
Question48:-The difference in higher calorific value and lower calorific value of fuel is due to
‘A: Latent h.... See more

D-None of these
Correct Answer:- Option-é

Question25:-The boiling point of water in Fahrenheit scale is
۸-08
മം
മ
‏يم‎
‎Correct Answer:- Option-C

Question26:-The freezing point of mercury is

೨4590
3990

6ی

त

Correct Answer:- Option ®
Question27:-The heat required for changing the state of any object without changing its temperature is called
‘AcSensible heat
B:-Latent heat
C-S.... See more

D-None of the above
Correct Answer:- Option-C
QuestionS0:-The device which divides the high pressure side and the low pressure side of a refrigerating system is known as
‘A-Condenser
B:-Evaporator
CeReceiver
Expansion device
Correct Answer:- Option-D
QuestionS1:-The leakage in a refrigeration system using ammonia is detected by
‘AcHalide torch
B:-Sulphur sticks
೦-5೦೩) ೩0ರ water
D-All of these
Correct Answer:- Option ®
Questio.... See more

D:-None of these
Correct Answer:- Option-B
Question78:- method is used to detect leaksin Refrigeration system.
A:-Observation
B:-Soap Bubble
C:-Water tank dipping
D:-Alll of these
Correct Answer:- Option-D
Question79:-Finand tube type evaporator is used in
A:-Window AC
B:-Package AC
C:-Split AC
D:-Alll of these
Correct Answer:- Option-D
Question80:-Direct Cool Refrigerator is also called as
A:-Conventional type Refrigerator
B:-Frost.... See more

B:-270-285 days
C:-240-250 day
D:-290-300 days
Correct Answer:- Option-A
Question38:-Activation of lactoperoxidase system can increase keeping quality of
A:-Pasteurized milk is enhanced to seven weeks at refrigeration
B:-Raw milk is enhanced by 7 days at refrigeration
C:-Raw milk up to 7 hours at room temperature
D:-Pasteurized milk is enhanced to seven days at refrigeration
Correct Answer:- Option-C
Question39:-The yoghurt is produced by fermentation of m.... See more

1092017 ا الا ل اا ااال لاما

33.

34.

35.

36.

37.

38.

39.

40.

Example of rigid coupling
A) Oldhams coupling B) Universal coupling
C) Slesve coupling D) All the above

In cams, dwell period

A) Is the period at which the cam is stationery

8) 19 179 period at which the follower is stationery

C) Is the period at which both the cam and follower are stationery
D.... See more

42,

43.

44.

46.

47.

48.

49.

50.

The entropy change in a reversible adiabatic process is ‏؛‎
‎(A) മണ @) <0
)© <0 M =0

The efficiency of a Carnot cycle operating between the temperature limits of 327° and 27° is :
(ക) 85% (ए) 60%
(ட 50% ൬) 70%

One ton of refrigeration is equal to : _
(^) ‏٦37‎ (೫) 3.81%
)0 47 று ‏٢٣‎

Which of the followin.... See more

समन न

42. The device which permits the vehicle reverse ‏اج‎ %

(4) Clutch (8) Gear box

(¢) Fly wheel (D) Differential
43. Which type of rear axle is used for heavy commercial vehicle?

(A) Quarter floating (8) Semi floating

(C) Three quarter floating (D) Full floating

44. In air brake system air compressor is driven by :
(ക) Engine itself (B) Electric mator
) Hand operated (D) Battery

45. The principle used.... See more

73. The body which absorbs all the radiations falling on it is called

(A) white hody (ए) transparent body
(C) opaque body (D) black body
74. The ratio of total emissive power of a body to the total emissive power of a black body is
called
(A) absorptivity (8) reflectivity
(C) emissivity (D) transmissivity

75. One tonne refrigeration in SI unit is equal to

(A) 50 kd/min (8) 87
(C) 3000 J/mm (D) 200 kJ/min
76, The temperature of air recorded.... See more

36.

37,

38.

40.

41.

42.

44.

First law of thermodynamics refers to conservation of :

(A} mass (8) momentum (C) ಅರ್ಗ (D) ட

Heat is being supplied to air in a cylinder fitted with a frictionless piston held by a
constant weight, the process is :

(A) isothermal (8) adiabatic (C) 180೧೩1೦ (10) isochoric

One Ton of refrigeration 15 equivalent to :
(മ) ദസ്‌ (8) 3.5 वष .... See more

10.

11.

12.

13.

14.

15.

16.

The heart of refrigeration system 18 :
(ಹ) Liquid receiver (B) Condenser
(2) Evaporator (D) Compressor

Velocity is measured in the units of :
(A) RPM (B) CFM
€) ए पणः M FPM

Colour code of ammonia refrigerant cylinder :
(ക) Light blue (8) Light green
(C) Orange (D) ஹு

Identify the zeotropic refrigerant from the following :
(മ ೫-40 .... See more

66.

67.

68.

69.

70.

71.

72.

78.

74.

In a system, neither mass nor energy is allowed 10 cross the boundary of the system 15
known as :

(ಗಿ) Isentropic system (B) Isolated system
(C) TIsothermal system (D) Closed system

Charles law, mathematically defined as :
ல V/t = constant (8) p-V =constant

(C) ` 0/1 = constant (D) p-t =constant

Pascal (Pa) is the unit of :
See more

8.

10.

11.

12.

13.

14.

15.

“ASHRAE" is :

(ಯ) American Society of Heating Refrigerating and Air Conditioning Engineers
{B) Aseociation of States of Heating Refrigerating and Air Conditioning Engineers
(C) American Society Having Refrigerating and Air Conditioning Engineers

(D) American Society of Harmful Refrigeration and Air Conditioning in Earth

Refrigeration is the process of
(A) Removing<.... See more