| Post Name | A C Plant Operator - Kerala State Film Development Corporation Ltd. |
|---|---|
| Question Paper Code | 095/2024/OL |
| Category Code | 255/2023 |
| Date of Test | 16 August 2024 |
| Exam Type | Online Examination |
| Total Questions | 100 |
1
What is the advantage of waste disposal?
Answer
D. Ensure workshop neat and tidy
2
What 'A' denotes in ABC of first-aid?
Answer
C. Airway
3
Which part of Universal Surface Gauge holds the scriber?
Answer
A. Snug
4
Which is an integral part of the stock in Vernier Bevel Protractor?
Answer
B. Dial
5
Which is used to remove drills, chucks and sockets from the machine spindle?
Answer
D. Drift
6
Name the Hand shear its one of the handle of the shear is bend downwards and the bending portion should be fixed on the iron plate's hole and upper handle will be held by worker?
Answer
C. Block shears
7
24 SWG is equal to how many millimeters?
Answer
B. 0.629 mm
8
Which defect occurs in lap joint, when the flame is directed on the edge of the top plate?
Answer
A. Edge of plate melted off
9
Which type of edge preparation is done for gas welding a 18 mm thick copper butt joint?
Answer
B. Double vee
10
Unit of frequency is
Answer
A. Hertz
11
Name the property of a substance which gives opposition to flow of electron through itself.
Answer
C. resistance
12
Insulation resistance of electrical equipment is measured by
Answer
B. Meggar
13
What is the purpose of centrifugal switch in single phase motor?
Answer
A. Disconnect auxiliary winding of motor
14
Name the motor used in ceiling fan
Answer
D. permanent capacitor motor
15
The speed of rotating magnetic field in stator of an induction motor is known as
Answer
B. synchronous speed
16
Starter used to start slip ring induction motor is
Answer
B. Rotor resistance starter
17
The main function of starter is to
Answer
B. limit inrush of current at starting
18
Expansion of FET is
Answer
A. Field Effective Transistor
19
Which component in rectifier convert AC to DC
Answer
C. diode
20
In SI system the pressure measuring unit in refrigeration is
Answer
B. Pascal
21
What is the use of bent snips in refrigeration works?
Answer
C. Cutting the sheet along curved lines
22
The input power requirement for thermo electric refrigeration system is
Answer
C. Low voltage DC input
23
Which refrigeration system is driven by low grade energy?
Answer
D. Steam jet refrigeration
24
The type of condenser used in traditional domestic refrigerators
Answer
D. Natural convection type
25
The capacity of shell and coil type condenser is around
Answer
B. 50 TR
26
Main disadvantage in manual defrosting is
Answer
B. Taking too much time
27
Identify the method of defrosting used in frost free refrigerator
Answer
C. Electric defrosting
28
Recuperators type heat exchangers are not used in
Answer
D. Chemical factories
29
Cooling tower efficiency is the ratio of
Answer
C. Range to difference of temperature of water entering the cooling tower and wet bulb temperature of air
30
Refrigerator efficiency is _______ is the C.O.P of the refrigerator.
Answer
D. Independent
31
Which one of the following is not a suitable application of evaporators?
Answer
A. Heating
32
The expansion device used in domestic refrigeration is
Answer
C. Capillary tube
33
Thermodynamic process where no heat is exchanged with the surroundings is
Answer
A. Adiabatic
34
The valve used to restrict or throttle the fluid in a particular direction to influence the volumetric flow of the fluid
Answer
D. Check valve
35
Operation of thermostatic expansion valve is based on changes in
Answer
B. Degree of superheat at exit from the evaporator
36
The compression process shown in the P-H diagram of a vapour compression refrigeration cycle is
Answer
C. Straight line with positive slope
37
In the vapor compression refrigeration system sub cooling of the refrigerant in the condenser results in
Answer
A. Increase in size of the evaporator
38
L/G ratio of a cooling tower is
Answer
A. Water flow rate / Air mass flow
39
Reason for reduction in suction pressure of the compressor
Answer
D. Fouling of the evaporator surface
40
Counter flow heat exchanges transfer _______ heat than parallel flow heat exchangers.
Answer
B. More
41
Which of the following statements hold true for ice refrigeration?
Answer
D. The rate of refrigeration decreases with time
42
Name the type of compressor used when the rate of flow of the refrigerant is large
Answer
B. Centrifugal compressor
43
The reason for using analyzer-rectifier combination in absorption refrigeration cycle
Answer
B. To eliminate the water vapour from ammonia vapour
44
The shape of P-V curve for an ideal gas is
Answer
C. Hyperbolic
45
When water cooled condenser is used in a refrigeration system trapped air will be usually indicated by
Answer
D. Unusually high head pressure when compared to the existing temperature of the liquid refrigerant
46
In a vapour compression system, the condition of refrigerant before entering the
Answer
B. Superheated vapour
47
Dial thermometer is used to measure
Answer
C. Vapour pressure
48
Which of the following property is desirable for an ideal refrigerant?
Answer
B. Low viscosity
49
The detection of leakage in a refrigeration system using Freon as refrigerant is accomplished by
Answer
A. Halide torch
50
Freon 12 belongs to the refrigerant category of
Answer
B. Methane family
51
Which of the following can be used as a secondary refrigerant?
Answer
D. H₂O
52
Which one of the following refrigerants is not derived from chlorofluorocarbons?
Answer
D. R 744
53
COP stands for
Answer
A. Coefficient of performance
54
The process which changes the refrigeration system from R12 to R401a is called
Answer
B. Retrofitting
55
What is the typical temperature of a single-door refrigerator freezer?
Answer
B. -18°C
56
The main disadvantage in manual defrosting method is
Answer
B. Takes too much time
57
The cleaning process of a refrigeration cycle involves cleaning the
Answer
D. Deposited solids and oils
58
Water cooler tank is made up of
Answer
A. Stainless steel
59
The sensing element in a thermostat of a bottle cooler is
Answer
D. Thermal bulb
60
What is the most commonly used as insulating material in deep freezers?
Answer
B. PUF
61
Which refrigerant is mostly used in ice plants?
Answer
B. Ammonia
62
Air conditioning involves
Answer
D. All of the above
63
The thermodynamics law which represents the concept of temperature
Answer
D. Zeroth law
64
Which component absorbs heat in package AC?
Answer
C. Evaporator
65
Deep freezer is mostly used for
Answer
B. Storing ice cream
66
The type of refrigeration cycle employed in room AC
Answer
C. Vapour compression refrigeration
67
The device that controls the temperature in window AC
Answer
D. Thermostat
68
In package air conditioner, the preventive measure for scale formation in water cooled condenser
Answer
B. Improve water quality
69
The component that belongs to outdoor unit of split AC
Answer
C. Compressor
70
Which is the first process in shifting the split AC from one place to another?
Answer
C. Pump down
71
Which material is used to make ducts in split AC?
Answer
B. GI sheet
72
How is the capacity of refrigerator is expressed
Answer
D. Litres
73
The type of split AC in which indoor unit is mounted on the ceiling
Answer
A. Cassette AC
74
The defrost thermostat measures the temperature of
Answer
C. Evaporator
75
The pH of brine water used in ice candy plants need to be maintained between
Answer
D. 7.0 to 8.0
76
The refrigerant employed in ice plants working on the principle of vapour compression refrigeration system is/are
Answer
C. R-22 and R-717
77
Choose the correct option using the following statements based on retrofitting an industrial ice plant from R22 to a more environment friendly refrigerant : Statement 1 : The global warming potential of the new refrigerant must be similar to that of R-22 Statement 2 : The compatibility of the new refrigerant with existing lubricants need not be verified
Answer
D. Both Statement 1 and Statement 2 are wrong
78
The usual operating temperature range of low temperature walk in freezer used for holding frozen food is
Answer
A. -15°C to -40°C
79
The cause of high suction pressure and high discharge pressure noticed in refrigeration system of a cold storage plant can be
Answer
D. All of these
80
Which of the following is TRUE with respect to air -tight insulation applied in cold storage systems?
Answer
B. The insulation material must be fire proof
81
Which of the following is TRUE for a basic compressor refrigeration system for cold storage application?
Answer
A. King valve is for pumping down the system
82
Choose the correct option using the following statements pertaining to the analysis of the psychrometric chart towards the right direction : Statement 1 : Constant relative humidity plots are uphill curves Statement 2 : Constant wet bulb temperature lines are downhill straight lines
Answer
C. Both Statement 1 and Statement 2 are correct
83
For air with a relative humidity of 80%
Answer
B. Dew point temperature is less than Wet bulb temperature
84
If a mass of moist air contained in a closed metallic vessel is heated, then its
Answer
A. Relative humidity decreases
85
Which of the following is TRUE regarding sensible cooling of air?
Answer
C. Dry bulb temperature decreases, wet bulb temperature decreases, dew point temperature remains constant
86
What is the advantages of using fan coil units in a central AC plant?
Answer
C. Ability to provide zoned heating and cooling
87
Which type of fan used in central AC system has the air entering the impeller axially, turn 90 degree and get discharged radially through the casing?
Answer
B. Centrifugal fan
88
Which of the following statements is NOT TRUE about the operation of components in a central air conditioning system?
Answer
A. The expansion valve reduces the pressure and temperature of the refrigerant, enabling better heat absorption into it in the condenser coil
89
Which of the following is/are associated with the performance of an air- cooled condenser in a packaged air conditioning system?
Answer
D. All of these
90
What is the full form of VRF with respect to refrigeration and air conditioning field?
Answer
A. Variable Refrigerant Flow
91
Which type of duct is commonly used in residential AC systems due to its ease of installation and flexibility?
Answer
C. Flexible Duct
92
What is the primary function of ducts in a residential air conditioning system?
Answer
B. To distribute conditioned air throughout the house
93
Which of the following is/are considered in duct design for a centralized air conditioning system?
Answer
D. All of these
94
Choose the correct option using the following statements based on insulation of ducts used in air conditioning systems : Statement 1 : Insulation prevents condensation in duct and minimizes noise from air movement. Statement 2 : Insulated ducts reduce heat gain or heat loss and there by improve energy efficiency
Answer
C. Both Statement 1 and Statement 2 are correct
95
What is the primary function of air filters in mobile air conditioning systems?
Answer
B. To remove dust and particles from the air
96
Which type of air filter used in a residential air conditioning system is comparatively having the highest efficiency in capturing fine particles, including bacteria and viruses?
Answer
C. HEPA filters
97
Which of the following is/are the typical part of the servicing routine for air filters in commercial air conditioning systems?
Answer
D. All of these
98
Which is the electric ciruitary component used to sense the temperature of air coming off the evaporator coil area in car air conditioning system?
Answer
A. Thermistor
99
Choose the correct option using the following statements : Statement 1 : In automobile air conditioning systems with R 134a, serpertine type evaporator has higher performance than plate and fin type evaporator. Statement 2 : A compressor clutch facilitates torque transfer from engine front end accessary drive to compressor rotating assembly of automobile AC
Answer
B. Only Statement 2 is correct
100
Which of the following is/are applicable to Roof Mounted Package Unit (RMPU) used in AC coaches of Railways?
Answer
D. All of these
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