| Post Name | Refrigeration Mechanic (HER) - Health Services |
|---|---|
| Question Paper Code | 014/2020/OL |
| Category Code | 223/2017 |
| Date of Test | 12 September 2020 |
| Medium of Question | ENGLISH |
| Exam Type | Online Examination |
| Total Questions | 100 |
1
Day after tomorrow is Friday, then what is the previous day of today ?
Answer
C. Tuesday
2
If TOP is coded as POT, then TABLE is coded as
Answer
A. Elbat
3
Find out the missing letter of the following series : B, E, H, _
Answer
C. K
4
How much is 40% of 3 hour and 30 minutes ?
Answer
B. 1 Hr. 24 mts.
5
A teacher is to school, like a nurse is to
Answer
D. Hospital
6
If BAG is coded as 217, decode the number 6554.
Answer
B. FEED
7
In a month with 31 days, the ļ¬rst day of the month is Tuesday, then the last day of the month is
Answer
D. Thursday
8
Insert the missing number : 14 9 5 13 7 6 21 8 ā
Answer
C. 13
9
Arun walks 100 metre in 4 minutes. How many minutes will be take to complete 575 metre ?
Answer
C. 23 mts.
10
Find the odd-man out.
Answer
D. 70
11
The ratio of actual mass of water vapour in a given volume of moist air to the mass of water vapour in the same volume of saturated air at the same temperature and pressure is known as
Answer
D. Relative humidity
12
A standard ice point temperature corresponds to the temperature of
Answer
D. Mixture of ice and water under equilibrium conditions
13
The suction pipe diameter of refrigerating unit compressor in comparison to delivery side is
Answer
A. Bigger
14
At 100% relative humidity, the temperatures, dry bulb, wet bulb, dew point and saturation are
Answer
A. Equal
15
Humidity ratio is the mass of water vapour present in 3
Answer
D. 1 kg of dry air
16
Critical pressure of a liquid is the pressure
Answer
A. Above which liquid will remain liquid
17
Ammonia is
Answer
D. Highly toxic and inļ¬ammable
18
For room air distribution, the maximum variation in temperature is
Answer
B. 1 degree Celsius
19
The device used to ļ¬nish a drilled hole
Answer
D. Reamer
20
Presence of moisture in a refrigerant aļ¬ects the working of
Answer
C. Expansion valve
21
The boiling point of ammonia is
Answer
C. ā33.3 degree Celsius
22
Which of the following refrigerant has the highest critical point temperature ?
Answer
A. Freon-11
23
One ton of refrigeration is equal to the refrigeration eļ¬ect corresponding to melting of 1000 kg of ice in
Answer
B. In 24 hour
24
In Electrolux refrigerator
Answer
C. Ammonia evaporates in hydrogen
25
One tonne of refrigeration is equal to
Answer
D. All the above
26
On psychrometric chart, dry bulb temperature lines are
Answer
B. Vertical
27
The comfort conditions in air conditioning system are deļ¬ned by
Answer
A. 22Ā°C dry bulb temperature and 60% relative humidity
28
Condensing temperature in a refrigerator is the temperature
Answer
D. At which a refrigerant becomes liquid
29
The function of brine agitator in ice plant is to
Answer
C. Obtain uniform temperature of brine
30
A sling psychrometer is used to measure
Answer
B. Humidity
31
A product of decomposition of oil resulting from impurities or moisture is
Answer
A. Sludge
32
Out of the following compressors which one has no moving parts ?
Answer
C. Thermo
33
The heat rejection factor is given by
Answer
C. 1 + 1/COP
34
The refrigerant for a refrigerator should have
Answer
C. High latent heat
35
Freon group refrigerants are
Answer
C. Nontoxic and non-inļ¬ammable
36
In a Carnot cycle, heat is transferred at
Answer
C. Constant temperature
37
A process in which substance is exposed to mechanical or chemical action of air is called
Answer
B. Aeration
38
The capacity of domestic refrigerator is of the range of
Answer
A. 0.1 to 0.3 TR
39
The tubes of shell and tube condenser in ammonia refrigerant is made up of
Answer
A. Steel
40
A bootstrap air cooling system has
Answer
B. Two heat exchanger
41
A system of ļ¬xed mass and identity whose boundaries are determined by the space of matter occupied in it is called
Answer
A. Closed system
42
Formation of frost on evaporator in refrigerator
Answer
A. Results in loss of heat due to poor heat transfer
43
Chemical formula of Freon-12
Answer
A. š¶š¶š2 š¹2
44
Heating of air without changing its moisture content takes place on psychrometric chart along
Answer
C. A horizontal line of the constant dew point
45
Drift loss in cooling tower is of the order of
Answer
C. 10 to 20%
46
Out of the following which one is an example for intensive property ?
Answer
D. All the above
47
Which of the following property remains constant during throttling process ?
Answer
D. Enthalpy
48
According to Charles law for a perfect gas
Answer
B. š2 /š1 =š2 /š1 , if P is kept constant
49
The bank of tubes at the back of domestic refrigerator is
Answer
A. Condenser tubes
50
In cooling tower water is cooled by the process of
Answer
C. Evaporation
51
The latent heat of water is
Answer
A. 540 K.Cal/Kg
52
Thermal conductivity of air with rise in temperature
Answer
A. Increases
53
The thermostatic expansion valve is also called
Answer
A. Constant superheat valve
54
A grill along with a damper is called
Answer
A. Register
55
The refrigeration plants are charged by introducing refrigerants from the cylinder at the
Answer
B. Receiver
56
Domestic refrigerator working on a vapor compression cycle uses the following type of expansion device.
Answer
D. Capillary tube
57
The measurement of temperature is given by which thermodynamic law ?
Answer
A. Zeroth law
58
A drier is located in the
Answer
A. Liquid line
59
Out of the following refrigerants, which one has lowest freezing point ?
Answer
A. Freon-22
60
The power per tone in KW of refrigeration is given by
Answer
A. 3.5/COP
61
The index which correlates the combined eļ¬ects of air temperature, relative humidity and air velocity on the human body, is known as
Answer
C. Eļ¬ective temperature
62
The process of adding of moisture to air at constant dry bulb temperature is known as
Answer
A. Humidiļ¬cation
63
Undercooling in a refrigeration cycle
Answer
A. Increases COP
64
Superheated vapor behaves
Answer
D. Approximately as gas
65
The most widely used superconductor is
Answer
C. Niobium
66
The unit of thermal diļ¬usivity is
Answer
C. mĀ²/h
67
Dust and other impurities in air are removed by
Answer
D. Any of the above
68
The refrigeration eļ¬ect in a dry evaporator compared to ļ¬ooded evaporator in a similar plant
Answer
C. Is less
69
An air washer is used in a refrigeration system for
Answer
D. All of the above
70
If suction pressure decrease, then COP
Answer
A. Decreases
71
Cooling towers are installed in places where
Answer
B. Water is scarce
72
When two refrigerants are mixed in the proper proportions, the mixture forms a third refrigerant called
Answer
C. Azeotropic refrigerant
73
Air refrigerators works on
Answer
C. Reversed Joule cycle
74
Psychrometry is the science of measuring of _________ in air.
Answer
C. Moisture
75
Lithium bromide in vapor absorption refrigeration system is used as
Answer
D. Absorbent
76
The vertical distance, the air moves after it leaves the outlet and reaches at the end of blow is called
Answer
C. Drift
77
A DC shunt motor has
Answer
A. Constant speed
78
The ratio of supplied air to the air leaving the room is known as
Answer
A. Entrainment ratio
79
Reciprocating refrigeration compressor uses following type of valve
Answer
B. Ring plate valve
80
Thermal insulator provide ________ path to heat.
Answer
B. Longer
81
A Baudelot evaporator is used to
Answer
C. Separate cream from milk
82
The most suitable refrigerant for commercial ice plant is
Answer
B. Ammonia
83
Moisture in refrigeration system is removed by
Answer
D. Any of the above
84
Air cooler reduces temperature and
Answer
B. Increases humidity
85
Which of the following is not desirable property of good insulating material ?
Answer
B. High heat conductivity
86
The following type of expansion device is utilized in ļ¬ooded evaporator
Answer
D. Float valve
87
The solar radiation reaches earth by beam radiation and
Answer
B. Diļ¬used radiation
88
As relative humidity decreases, the dew point will be
Answer
A. Lower than wet bulb temperature
89
The unit of capacitance is expressed by
Answer
A. Farad
90
An electrically operated switch used to disconnect the starting winding from the circuit, when the motor reaches 75% of its rated speed
Answer
C. Relay
91
Which part of Indian Constitution deals with Fundamental Rights ?
Answer
D. Part 3
92
Which article of Indian Constitution deals with Amendment of Constitution ?
Answer
C. Article 368
93
How many schedules are there in Indian Constitution ?
Answer
C. 12 Schedules
94
Which Amendment added Right to Education to Indian Constitution ? ļæ½ā
Answer
A. 86 Amendment ļæ½ā
95
Who was the Chairman of Drafting Committee of Indian Constitution ?
Answer
C. Dr. B. R. Ambedkar
96
Who is the Ex-Oļ¬cio Chairman of Rajya Sabha ?
Answer
B. Vice President
97
Name the body which framed Indian Constitution.
Answer
B. Constituent Assembly
98
Which Article of Indian Constitution abolishes untouchability ?
Answer
A. Article 17
99
What is the minimum age required to contest in Lok Sabha Election ?
Answer
D. 25 years
100
How many members are elected to Kerala Legislative Assembly ?
Answer
A. 140
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