47,

49.

51,

Bacteria which can survive under refrigeration are known as
(A) Mesophilic (B) Proteophiliic
(€) Psychrophillic (D) Thermoduric

Saurkraut is fermented product of
(ಯ) 1 (B) Vegetable
(C) Cereal (D) Pulse

Which one of the following cooking techniques causes highest destruction of vitamins in
vegetables ?

(ಯ) Boiling (B) Microwaving
(ಲ) Baking (D) Pressure cooking

Identify the active principle.... See more

108/2017 [1111111111

46.

47.

48.

49.

80.

51.

52.

53.

54.

Which of the following is dimension less ?
A) Specific gravity 8) 5060110 ೫61601
0) 5060110 ೪೦176 7) 5060110 80666

Job evaluation is the method of determining the
A) Value of overall production B} Worker's performance on job
C) Relative values of 8 job D) Worth of the machine

The information provided by the oxyg.... See more

O O 108/2017

55.

56.

57.

58.

59.

60.

61.

In vapour compression cycle, the condition of refrigerant is high pressure saturated
liquid

A} Before entering the expansion valve

B) Before passing through the condenser

C) Before entering the compressor

D) After passing through the condenser

Delta iron occurs at a temperature of
A} Between 910°C and 1400°C

B) Between 14.... See more

O O 108/2017

69.

70.

71.

72.

73.

74.

75.

76.

77.

The air standard efficiency of an Otto cycle compared to diesel cycle for the given
compression ratio is

A} More B) Same
C) Less D) Unpredictable

If the intake air temperature of IC engine increases, its efficiency will
A) Unpredictable B) Remains same
C) Depend on other factors D) Decrease

An important characteristi.... 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

46.

47.

48,

49.

50,

51,

52,

53.

How much air is normally required for the working of air-cooled condenser per ton of

refrigeration ?
(ಹ) 50to 55 cu.m/min. 8
(C) 20 to 25 cu.m/min. D)

The thermistors are
കു
(9)
©
(D)

pressure type temperature sensors
bellow type temperature sensors
resistance type temperature sensors
all of the above

What are the e.... See more

86, An evaporative condenser 18 8

87,

88,

89,

೨0,

91:

92:

(ಹ) 47600160 condenser
(൫) Water cooled condenser

)© Both air and water cooled at the same time

(D) None of these

Approach of a cooling tower is defined as the

(A) difference of dry bulb temperature of surrounding air and temperature of water leaving

the cooling tower.

(B) difference of temperature of water leavi.... See more

93.

94,

95.

96.

97.

98.

99.

The best refrigerant is one for which .
ക ODP=1 (B) ODP=05

(© ODP=0.75 യ ODP=0
Relative COP =

(ಹ) Actual COP/ Theoretical COP (B) Theoretical COP / Actual COP
(೮) Actual COP x Theoretical COP )©( None of these

The refrigerant after condensation process is cooled below the saturation temperature before
throttling. Such a process is called

(^) Sub.... See more

47,

49.

51,

Bacteria which can survive under refrigeration are known as
(A) Mesophilic (B) Proteophiliic
(€) Psychrophillic (D) Thermoduric

Saurkraut is fermented product of
(ಯ) 1 (B) Vegetable
(C) Cereal (D) Pulse

Which one of the following cooking techniques causes highest destruction of vitamins in
vegetables ?

(ಯ) Boiling (B) Microwaving
(ಲ) Baking (D) Pressure cooking

Identify the active principle.... 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

93.

94,

95.

97.

Which assumption is wrong for LMTD?
(A) Overall heat transfer coefficient should vary throughout the heat exchanger
(3) The heat exchange takes place only between the two fluids
(C) Temperature of both fluids are conatant over a given cross section

(D) The specific heat at constant pressure remains constant throughout the heat
exchanger

The volume of air delivered by the compressor is known 88 : ∙
∁≓�.... See more

33.

34.

86.

37.

88,

39.

40.

The tendency of knocking in CI Engines is reduced by :
(ಗಿ) high self- ignition temperature of fuel
18) injection of fuel just before TDC
(0 decrease in injection pressure

(D) decrease in cooling water temperature

Pelton wheel is uged in those places where ‏؛‎
‎(ക high head and low discharge are available
(ए) low head and high discharge are available
See more

10.

11.

12.

13.

14.

15.

Sling psychrometer is used 10 71085076 :
(A) only dry bulb temperature
(C) dry and wet bulb temperature

(B) only wet bulb temperature
(D) relative humidity

In air refrigeration refrigerating effect is produced by :

(A) compressing air
(C) subcooling

Accumulator is provided for :

(ക storing of unvapourized liquid

(0) exchange of heat

(B) ex.... See more

16.

17:

18.

39.

20.

21.

22.

23.

The brine is always used as a secondary refrigerant in :

(ಗಿ) cold storage

(0) 1086 plant

In winter air conditioning the process used is :

(A) Dehumidification
(C) Humidification

രു
(D)

(0)
യ)

At which point °C scale and °F scale will be same :

(ಯ) -405
© 273

©)
(D)

mil.... 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

40.

41.

42.

44.

45.

46.

47.

48.

The absolute zero temperature corresponds on the condition when :
(^) all the substances exit only as solids
(B) volume of a gas reduces to zero
(0 kinetic energy of gas molecules become zero

(D) no pressure is exerted by the gas

The oil used with 134 A refrigerant is :
(A) Mineral oil (B) CapillaD
(€) Polyol ester 011 (D) Lubricating oil

Cripse.... 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

10.

11.

12.

13.

14.

15.

16.

The pressure in a capillary tube decreases due to :
(ക) frictional resistance offered by the tube wall
(18 acceleration of refrigerant in the tube
(C) heat transfer from the tube
(0) both (A) and (B)

The freon group of refrigerants are :
(A) halo-carbon refrigerants (8) azeotrope refrigerants
(£) inorganic refrigerants (D) hydro-carbon refrigerants

In electrolux.... See more

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

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

70.

71.

72.

73.

74.

78.

78.

727

78.

122/2016

For new clutches, it is generally assumed that
^) Wear is uniform

B) Pressure is uniform

C) Both pressure and wear are uniform

D) None of these

The thermal efficiency of theoretical Otto cycle
A) Increases with increase in compression ratio
B) Increases with increase in isentropic index 7
C) 15 independent of pr.... 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

169/2016

Maximum : 100 marks
Time : 1 hour and 15 minutes

1. One tonne of refrigeration is equal to :
(ക 21 KJ/min (B) 420 KJ/min
(©) 210 KJ/min 9 (D) 620 KJ/min

2. Awater cooler is uses the refrigerant :
(മ R22 ೫) 1
(0). ೫717 D) 134,

3. What is the angle of point of centre punch?
(ക 90° രു 60
(0) 4 (1) 305

4. The switch should control the line :
(ಯ) Earth (B) Phase
(C) Neutral (D) Common

.... 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

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