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

2:-134 8
B:-Freon-22
C:-Freon-11
D:-None of these
Correct Answer:- Option-A
Question49:-Secondary Refrigerant is useful because
A:-ltis cheap
B:-Easily available
C:-It reduces the primary Refrigerant Piping
D:-None of these
Correct Answer:- Option-C
Question50:-In Split air conditioners the following condenser is used
A:-Forced convection air cooled
B:-Natural Convection air cooled
C:-Water cooled
D:-Evaporative type
Correct Answer:.... See more

65.

66.

67.

68.

69.

70.

079/21

Consider an ideal vapor compression refrigeration cycle. If the throttling process
is replaced by an isentropic expansion process, keeping all the other processes
unchanged, which one of the following statements is true for the modified cycle ?
A) Coefficient of performance is the same as that of the original cycle

)
)
)
)

[81]

Coefficient of performanc.... See more

Correct Answer: Option-D
Question16:-Crtical pressure of a liquid is the pressure
‘AcAbove which liquid will remain liquid
B:-Above which liquid becomes gas
CAbove which a liquid becomes gas
D-At which all the phases exist together
Correct Answer:- ೦೧000
Question 7:-Ammonia is
Ac Non-toxic
B:-Non-inflammable
பொரும்‌ and norvinflammable
D-Highly toxic and inflammable
Correct Answer:- Option-D
Question18:-For room air distribu.... See more

‘A-Ammonia is absorbed in hydrogen
B:-Ammonia is absorbed in water
‘C-Ammonia evaporates in hydrogen
Hydrogen 15 absorbed in ammonia
Correct Answer: Option-C
Question25:-One tonne of refrigeration is equal to
8-210 Kymin
2:35 ۷
०.३.5५5
०-५। the above
Correct Answer:- Option-D
Question26:-On psychrometric chart, dry bulb temperature lines are
‘Ac Horizontal
B:Vertical
೦೧೬ರ
പിഡി
Correct Answer: Optio.... See more

De-Lead
Correct Answer: Option-C
Question66:-The unit of thermal diffusivity is
‏۴6ھ‎
‏۸ھ‎
‏سن‎
‏ےب‎
‎Correct Answer: Option-C
Question67:-Dust and other impurities in air are removed by
Achir washer
B:-Centrifugal device
Ce-Adhesive impregnated filter
D-Any of the above
Correct Answer:- Option-D
Question68:-The refrigeration effect ina dry evaporator compared to flooded evaporator ina similar plant
cls sameSee more

Correct Answer:- Option-C
Question74:-Psychrometry isthe science of measuring of 1೧೫೧
‘AcTemperature
Bs Pressure
CeMoisture
D:-Heat
Correct Answer: Option-C
Question75:-Lithium bromide in vapor absorption refrigeration system is used as
Ac Refrigerant
B:-Cooling substance
CeLubricant
D:-Absorbent
Correct Answer:- Option-D
Question76:-The vertical distance, the air moves after it leaves the outlet and reaches at the end of blow is called.... See more

Correct Answer:- Option-D
Question16:-Crtical pressure of a liquid is the pressure
‘AcAbove which liquid will remain liquid
॥ which a liquid becomes gas
Ce-Above which a liquid becomes gas
D-At which all the phases exist together
Correct Answer:- Option-é
Question 7:-Ammonia is
॥
B:-Non-inflammable
CeToxie and norvinflammable
D-Highly toxic and inflammable
Correct Answer:- Option-D
Question18:-For room air distribution, the maximum varia.... See more

‘A-Ammonia is absorbed in hydrogen
B:-Ammonia is absorbed in water
C-Ammonia evaporates in hydrogen
D-Hydrogen is absorbed in ammonia
Correct Answer:- Option-C
Question25:-One tonne of refrigeration is equal to
‘A210 Kymin
2:35 ۷
3.50
D-All the above
Correct Answer:- Option-D
Question26:-On psychrometric chart, dry bulb temperature lines are
‘Ac Horizontal
B:Vertical
c-Curved
പിഡി
Correct Answer:- Option ®
Questi.... See more

Correct Answer: Option-C
Question74:-Psychrometry isthe science of measuring of ೧೫೧
‘AcTemperature
Bs Pressure
CeMoisture
D:-Heat
Correct Answer:- Option-C
Question75:-Lithium bromide in vapor absorption refrigeration system is used as
Ac Refrigerant
B:-Cooling substance
CeLubricant
D:-Absorbent
Correct Answer:- Option-D
Question76:-The vertical distance, the air moves after it leaves the outlet and reaches at the end of blow is called<.... See more

A:-134 a
B:-Freon-22
C:-Freon-11
D:-None of these
Correct Answer:- Option-A
Question49:-Secondary Refrigerant is useful because
A:-It is cheap
B:-Easily available
C:-It reduces the primary Refrigerant Piping
D:-None of these
Correct Answer:- Option-C
Question50:-In Split air conditioners the following condenser is used
A:-Forced convection air cooled
B:-Natural Convection air cooled
C:-Water cooled
D:-Evaporative type
Correct Answer.... 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

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

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

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

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

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

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