26.

27,

28.

29.

30.

31.

82.

38.

High side float valve is fitted on the condensing unit just after the :
(ಗ) Receiver (18) Compressor
(0 Condenser (D) Evaporator

According to Ohm's law [ = :

R
V. B =
(ക V.R (B) v
17
© RV D) 7
When air is heated relative humidity :
(4) Decreases (2) Increases
(0 Very high (D) None of the above
Which chemieal is used for .... See more

77.

78.

79.

80.

81.

82.

84.

Organisms grow at refrigeration temperature is called as :
(ക) Mesophilic Bacteria (B) Thermophilic Bacteria
(9 Psychrophilic Bacteria 1) Halophile Bacteria

Salinometer is used to measure :
(4) Specific gravity (B) Sugar content
(C) Salt content (D) Water content

Citrus fruits are rich in ————— vitamin.
(4) Vitamin C (B) Vitamin D
(C) Vitamin A (D) None.... See more

5

1.

(

A

Maximum : 100 marks

Time : 1 hour and 15 minutes

A chemical reaction will occur spontaneously at constant pressure and temperature, if the
free energy 18 :

(५) ‏سو‎ 8) +VE

(0) -VE . (D) None of these
Entropy is a measure of the ———————— of a system.

(A} Temperature changes only (B) Disorder

(() Orderly behawvior (12) None of these
Fundamental principle.... 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

75.

76.

த

78.

79.

` 80.

81.

82.

88.

Fourier’s law of heat transfer is related to :
(ಗಿ) Convection (B) Conduction
(C) Radiation (D) Condensation

The fluid, which absorbs heat through evaporation and rejects it by condensation is
known as :

(ക) കടല (3) Coolant
(©) Refrigerant (D) Solvent

The devices, which are fitted on a boiler for its safe and s.... See more

ے_

൭4. Work input to the air compressor with n as index of compression :
() inercases with ingrease in value of n
(B) decrease with increase in value of n
(C) remains same whatever the value of n

(D) first increases and then decreases with value 071

25. 1 tonne of refrigeration is equiv_alent to:

(ക) 336 kd/min (2) 210 kd/min

(C) 1400 kJ/min (D) 540 kd/min
26. The thermal conductivity is expressed as :

(५) W/mK ⋅ ≺�.... 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

80, Evaporative condensers cooling medium is :
(A) Combination of air and water (B) * Refrigerant vapour
(C) Natural Air (D) Chilled water

81, The effect of cooling produced by a good installed unit will be :
(ಯ) Maximum (B) Minimum
(0 Intermittent (D) Poor

52. In arefrigeration system frosting starts from capillary due to ;
(A) 0il in evaporator coil (8) Compressor has poor pumping
(0) Gas quantity is less (D) Drier filter partially blocked

5.... See more

67.

69.

70.

11

72:

78.

74,

75,

An object with a difference of potential exists between it and earth is called :
(മ) Live (B) Dead
(©) Earth electrode (D) Resistance Area

The reason for thermostat become defective is :
(A) Mbisture in the system (3) Lack of lubrication വി
(¢) Carbon formation in contact points (0) OLP is not responding

In Freon group condenser tubes are :
(4) Alum.... See more

67,

68.

70.

71.

72,

78.

१५.

75.

Air refrigeration cycle is usually employed in :
(ಗಿ) Domestic refrigerators (B) Commercial refrigerators
(C) Air conditioning (D) Gas 11061800100

Efficiency of a pelton wheel is maximum if the ratio of jet velocity to tangential velocity വ്‌
wheel is

ಯ 1 ® 2
(0 8 o 4
The number of inversions for a slider crank mechanism is :
(है) .... 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

41.

42.

43.

44,

45.

46.

47,

48.

ಚ

Kelvin-Plank's law deals with conservation വ്‌:
(५) Heat into work (ए) Mass
(C) Heat (1) Work

During refrigeration cycle, heat is rejected by the refrigerant in 8 :
(ക) . Compressor (B} Condenser

(C) Evaporator (D) Expansion valve

Specific heat is least for 7

(வ Water 12) ண
(C) Steam D) 108
Bush bearing is mad.... See more

൫4.

85.

86.

87.

88.

89.

80.

91,

The depth of center of pressure in rectangular lamina of height ‘A" with ene side in the liquid
surface is at :

h

வம்‌ ട്ട്‌
[കു B 3
2h ॥

(0) s (1) 7

Tdentify the refrigerant used for refrigeration purpose passenger air craft :
(ಯ) Freon-12 (B) Carbendioxide
(0 Sodium Chloride 1) കാ

The purpose o.... See more

10.

11.

12.

13.

14.

16.

17,

Pick up the statement that is not true with respect to Haemophilus influenzae :
(५) Growth ೧೫ chocolate agar medium (0) Pleomorphism

(0 Satellitism (D) Resistance 10 refrigeration

Cheose the method used for the estimation of blood urea +
(^) Liebermann-Burchard reaction (B) Jaffee reaction

(0 Berthelot reaction (1) Van den Bergh reaction

Ketone bodies in ur.... See more

32.

ॐ.

34.

38.

36.

37.

88.

39.

40.

In the Hole basis system which one of the following represents a press fit?
(^) ೫7/6 © 7
(C) 7 യ 7 6

Which of the following is true in the case of a diesel engine?
(ക) Indicated thermal efficiency is always lower than the bralke thermal efficiency
(B) Indicated thermal efficiency does not increase as brake power increases
(C) Indicated thermal .... See more

Question55:-Thermostatic expansion valves are set mostly fora super heat of
A:-5°C
B:-10°C
C:-15°C
D:-20°C
Correct Answer:- Option-A

Question56:-In a Refrigeration system with multiple evaporators at different temperature with compound compression and
flash intercooler, the suction vapour to the high pressure stage is

A:-Wet state
B:-Dry saturated
C:-Super heated
D:-Saturated liquid
Correct Answer:- Option-B
Question57:-The supply.... See more

A:-1.8%
B:-2.0%
6:0
0:- 3.0%
Correct Answer:- Option-C
00 8 salt of methylene blue is used in MBRT
A:-Thiocyanate
B:-Chloride
C:-Sulphate
D:-Bisulphate
Correct Answer:- Option-A
Question88:-The amount of water vaporized per unit area of surface in a 4-effect evaporator is approximately ...
that in single ளிகள்‌

2:-25%
B:-50%
C:-100%
D:-200%
Correct Answer:- Option-A
Question89:-In an efficient moder pasteuri.... See more

93.

94

96.

98.

99.

100.

Milk devoid of fat is known മട

(A) TImitation milk 08
(©) Skim milk त))

Milk plasma

Toned milk

Microorganisms which can grow at refrigeration temperature :

(A) Thermodurics (3)
((2) Psychrotrophs യ

The unit of Reynold’s number is :
(&) ‏ولس‎ (8)
(© സ (फ)

Identify the natural antioxidant
@ VitA 2)
(©) Vitamin E.... See more

93:

94

96.

98.

99.

100.

Milk devoid of fat is known as

(ಹ) Imitation milk (B) Milk plasma
(മ Skim milk (1) Toned milk

Microorganisms which can grow at refrigeration temperature :
(ക Thermodurics (B) Thermophils
)© Ps

chrotrophs (D) Mesophils

The unit of Reynold’s number is :
(A) Nm/s (8) kd/keg/K
(മ സ്‌ (D) None of the above

Identify the natural antioxidant
.... See more

17,

18,

19,

20,

21,

22,

23,

Who is the winner of US open badminton Championship Men'’s Single held at California
in 24t July 2017 ?

(ಹಿ) 115. 77೩೧೦7 (B) Parupalli Kashyap
(ಲ) Kidambi Srikanth (D) Sai Pranceth

Who is the director of controversial Bollywood film ‘Indu Sarkar’ ?
(A) Tigmanshu Dhulia (B) Madhur Bhandarkar
(ಲ) Sayed Ahamed Afzal (D) Mohit Marwah

Who is the pre.... See more

33,

34,

35,

36,

37.

38,

39,

40,

41,

42,

A low side float valve maintains the level of refrigerant in :

(A) Condenser (B) Evaporator

(9) Baudelot cooler (D) Flooded evaporator

Boiling point of R 600a is :

(മ) -33% छ) -12°C © -77°C (D) —40°C

RF remote control with a range of roughly :
(^) 100 feet (B) 40 feet (ಲ) 20166 (D) 10 feet

Bush bear.... See more

60.

6.

62,

63.

64.

65,

66,

67,

In a scroll compressor :

(മ) Both discharge and suction ports are located in the outer periphery

(B) Both discharge and suction ports are located near the center

(ಲ) The discharge port is in the center and suction port is on the outer periphery

(D) The suction port is in the center and the discharge port is on the outer
periphery

Piercing val.... See more

76.

77.

78.

79.

80.

81.

82.

83.

What is the reason for poor condensation in Split AC ?
(5) Condenser fan motor failure (B) Sufficient air flow
(C) Condenser tubes are nice (D) Condenser fin damage

Which instrument is used for measuring humidity ?

(A) Hydrometer (8) Thermometer

(C) Hygrometer (D) Anemometer

ODP Value of HFC 134a :

@) 1 ® 3 © o ¢ 2

De-superheatin.... See more

84,

85,

86,

87.

88,

89,

90,

91,

The unit of Resistance is

(ಹ) Ohm (8) Farad (ಲ) ೫೦0 (D) Ampere

The heart of the refrigeration system is
(ಹ) Condenser (8) Evaporator ) Liquid receiver (D) Compressor

Which line in Psychrometric chart as obliquely inclined straight lines and uniformly
spaced ?

(A) Relative humidity lines (B) Specific humidity lines
(ಲ) Enthalpy (D) Spe.... See more

Question29:-For detecting the hemoglobinopathies by electrophoresis we use
A:-clotted blood
B:-plasma
னி
D:-lysed red cell
Correct Answer:- Option-D
Question30:-Serum complements can be inactivated at a temperature of
A:-56°C for 15 mts
B:-56°C for 30 mts
C:-37°C for 20 mts
D:-37¢C for 30 mts
Correct Answer:- Option-B
Question31:-Bombay blood group can be detected by
A:-Cell grouping
B:-Forward grouping
C:-Serum grouping
D:-.... See more

D:-Engine speed
Correct Answer:- Option-D
Question29:-Which ടന चे part of magneto-ignition system?
A:-Condenser
B:-Battery
C:-Circuit breaker
D:-Induction coil
Correct Answer:- Option-B
Question30:-Superheating in a refrigeration cycle
A:-Decreases COP
B:-Increases COP
C:-COP remains unchanged
D:-Unpredictable
Correct Answer:- Option-D
Question31:-Change of resistance with intensity of light takes place in
A:-Photo-voltaic cell<.... See more