| Post Name | Technician Grade II (Refrigeration Mechanic) - Kerala Cooperative Milk Marketing Federation Limited |
|---|---|
| Question Paper Code | 073/2022/OL |
| Category Code | 014/2022 |
| Date of Test | 31 August 2022 |
| Exam Type | Online Examination |
| Total Questions | 100 |
1
Which extinguishes the ļ¬re of ļ¬ammable liquids ?
Answer
C. š¶š2
2
The best way of avoiding accidents is by
Answer
C. Observing safety rules related to job, machine and work place
3
What is smoothering in ļ¬re extinguishing ?
Answer
D. Stop the supply of oxygen
4
An outside micrometer has a negative error. The correct reading can be taken by
Answer
A. Adding the negative error in the actual reading.
5
Which type of taper is provided in the drill shank ?
Answer
C. Morse taper
6
Why the cutting faces of ļ¬les are slightly bellied on lengthwise ?
Answer
B. Filing ļ¬at surfaces is made easier
7
Which one of the following sheets is used for making highly corrosive acid tanks ?
Answer
D. Lead sheets
8
What is the use of feeler gauge ?
Answer
D. Check the gap between the mating parts
9
Which type of screw threads are rounded at the crest and root ?
Answer
Question Cancelled
10
Which tool is used for trimming the edges of a sheet metal cylinder ?
Answer
B. Bent snips
11
The diode used for voltage regulation is
Answer
B. Zener diode
12
Which tool is used for bending, seaming and forming of sheet metal ?
Answer
C. Stakes
13
One of the functions of electrode coating is
Answer
B. To stabilize the arc
14
The correct ļ¬ame for preheating before cutting is
Answer
B. Neutral ļ¬ame
15
What is the tool used to remove slag from the welding ?
Answer
B. Chipping hammer
16
Which motor has the least starting torque ?
Answer
C. RSIR
17
The squirel cage three phase induction motor is started by
Answer
C. Both (1) and (2)
18
Which electronic component is the voltage regulator ?
Answer
A. Zener diode
19
Which gas is produced by the chemical reaction of carbide and water ?
Answer
C. Acetylene
20
A ļ¬aring tool consist of
Answer
A. Flaring block and yoke
21
The size of tube cutter can be speciļ¬ed by
Answer
C. Maximum diameter of tube which it can cut
22
A lever type tube bender can form bends up to
Answer
D. 180Āŗ
23
Pinching tool is used for
Answer
C. Sealing or closing the copper tubes
24
Heat required to increase the temperature of 1 gram of water by 1 degree centigrade is called
Answer
A. Calorie
25
The boiling point of water in Fahrenheit scale is
Answer
C. 212Ā°
26
The freezing point of mercury is
Answer
B. ā 39ĀŗC
27
The heat required for changing the state of any object without changing its temperature is called
Answer
B. Latent heat
28
Which thermodynamic law presents the concept of temperature ?
Answer
A. Zeroth law
29
Dry ice is
Answer
A. Solid carbon dioxide
30
The liquid refrigeration system is also called
Answer
D. Both (1) and (2)
31
In vapour absorption system which energy is used ?
Answer
B. Heat energy
32
The cylinder volume between TDC and BDC is known as
Answer
C. Swept volume
33
A centrifugal compressor is also called
Answer
D. Both (1) and (2)
34
An example of dynamic compressor is
Answer
D. Centrifugal compressor
35
Rotary screw compressor is used for industrial and commercial applications with a capacity range of
Answer
B. 20 to 750 tons
36
The size of the gasket speciļ¬ed by its
Answer
B. Thickness
37
The main disadvantage of water cooled condenser is
Answer
A. Expensive
38
The condenser both air and water used as cooling medium is
Answer
A. Evaporative condenser
39
The eļ¬ciency of condenser increases due to
Answer
A. De scaling
40
In natural cooling tower, its sides are
Answer
B. Opened
41
In hard water the calcium carbonate contents is
Answer
B. 120 to 180 PPM
42
The diļ¬erence between the cooling tower water inlet and outlet temperature is known as
Answer
C. Range
43
Thermostatic expansion valves are generally set for a super heat of around
Answer
C. 4.4 to 5.5ĀŗC
44
In which type of expansion valve has high eļ¬ciency ?
Answer
D. Thermostatic expansion valve
45
The location of an expansion valve in a system is
Answer
D. Between liquid receiver and evaporator
46
The evaporator is also known as
Answer
D. All of the above
47
The evaporator which is used in high capacity refrigeration systems is
Answer
C. Flooded evaporator
48
Which process is done ļ¬rst in split AC for shifting from one place to another ?
Answer
C. Pump down
49
A compressor coupled to a motor externally is called
Answer
C. Open type compressor
50
The device which divides the high pressure side and the low pressure side of a refrigerating system is known as
Answer
D. Expansion device
51
The leakage in a refrigeration system using ammonia is detected by
Answer
B. Sulphur sticks
52
One ton of refrigeration is equal to
Answer
C. 12,000 BTU/hr
53
The undesirable property of a refrigerant is
Answer
D. High boiling point
54
The conditioned air supplied to the room must have the capacity to take up
Answer
C. Both room sensible heat and latent heat loads
55
Thermostatic expansion valve is used to maintain
Answer
A. Constant degree of superheat
56
In a refrigeration system, why are expansion devices located closer to the evaporator ?
Answer
B. To minimize the heat gain
57
The window type AC is installed slight slanting at the back. What is the reason for doing so ?
Answer
C. To make condensate water ļ¬ow into the drain pipe
58
What type of compressor motor is used in inverter split AC ?
Answer
D. Variable speed motor
59
Which of the following is not an advantage of capillary tube ?
Answer
D. A capillary tube designed for a speciļ¬c condition will also work eļ¬ciently for other conditions
60
The CSIR wiring of visible cooler has no
Answer
B. Running capacitor
61
What is the value of starting capacitor used for 1.5 TR capacity window AC ?
Answer
B. 80 to 100 MFD
62
What is the cause for water cooler runs continuously ?
Answer
B. Poor insulation
63
Separate thermostats are used in split AC units of the type
Answer
B. Multi split unit
64
Which of the following statement is wrong ?
Answer
D. None of the above
65
Materials form deposits inside the condenser water tubes is called
Answer
C. Water fouling
66
Why are ice cans made tapered in height ?
Answer
B. To facilitate dumping
67
What is the gas used in ice plants ?
Answer
B. Ammonia
68
The most common insulating material used in deep freezer is
Answer
A. PUF
69
Which type of evaporator is used in household refrigerators ?
Answer
A. Frosting evaporator
70
What is Air Condititiong ?
Answer
Question Cancelled
71
Which of the following is not a factor aļ¬ecting the capacity of evaporator ?
Answer
D. Evaporator pressure
72
The grill of an air conditioner should be washed with
Answer
C. Soap solution
73
Which arrangement avoids cooling water overļ¬ow in storage type water cooler ?
Answer
C. Float
74
In a vapour compression cycle the condition of refrigerant is saturated liquid
Answer
Question Cancelled
75
Which component is used to maintain the brine solution temperature evenly in a Ice candy plant ?
Answer
C. Agitator
76
In an Ice plant where the refrigerant after condensation is stored ?
Answer
B. Liquid receiver
77
Brine solution is the mixture of
Answer
A. Calcium chloride and water
78
How the walk in coolers wall panels are connected ?
Answer
D. Through in build lock
79
Which indication gives if the red bulb blinking outside the cold room ?
Answer
C. Someone is locked inside
80
Which electrically operated valve is used in cold storage plants ?
Answer
D. Solenoid valve
81
Why the relative humidity is kept above 90% in cold storage plants storing vegetables ?
Answer
A. To prevent moisture loss
82
Speciļ¬c humidity is also called
Answer
C. Humidity ratio
83
Wet bulb temperature of air whose relative humidity is 100% will be
Answer
A. Equal to dew point temperature
84
What is Room Sensible Heat Factor (RSHF) ?
Answer
B. RSH/(RSH+RLH)
85
Standard atmospheric pressure is
Answer
D. 1.01325 bar
86
What is one of the daily routine maintenance in a central Ac plant ?
Answer
C. Checking of refrigerant level, cold air temperature
87
In summer air conditioning the process is
Answer
B. Cooling and dehumidiļ¬cation
88
Which controls the refrigerant ļ¬ow in a package AC unit ?
Answer
D. Expansion valve
89
VRV stands for
Answer
D. Variable Refrigerant Volume
90
Glass wool is an example for
Answer
B. Fibrous insulation
91
Which type of duct requires least material for carrying air ?
Answer
A. Circular
92
AHU stands for
Answer
C. Air Handling Unit
93
The ducts are mostly made by
Answer
D. Galvanized Iron sheet
94
The space between the main ceiling and false ceiling is referred as
Answer
C. Plenum
95
In HEPA ļ¬lter, what stands for HEPA ?
Answer
B. High Eļ¬ciency Particulate Air
96
In an electronic ļ¬lter the air is ļ¬ltered by passing through a
Answer
D. Electrostatic ļ¬eld
97
Which ļ¬lter removes smoke and other odours ?
Answer
A. Electronic ļ¬lter
98
The condenser of car AC is
Answer
C. Air cooled
99
For what purpose dye is adding to the car AC system with refrigerant ?
Answer
B. To identify gas leak
100
The refrigerant used in automobile AC is
Answer
A. R134A
Discussion
Ask a doubt or share a tip.
No comments yet ā start the discussion.