Technician Grade II Refrigeration Mechanic Recruitment Exam Solved Question Paper download

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Technician Grade II Refrigeration Mechanic Recruitment Exam Solved Question Paper download Page 2 Question No. 1-10

Question #1:- A centrifugal compressor is also called
A:-Turbo compressor
B:-Radial compressor
C:-Scroll compressor
D:-Both (1) and (2)
Correct Answer:- Option-D

Question #2:-The best way of avoiding accidents is by
A:-Doing work in ancient way
B:-Doing work in one’s own way
C:-Observing safety rules related to job, machine and work place
D:-Using safety equipment
Correct Answer:- Option-C

Question #3:-What is smoothering in fire extinguishing ?
A:-Pouring of CTC
B:-Flashing with dry powder
C:-Use water to low temperature
D:-Stop the supply of oxygen
Correct Answer:- Option-D

Question #4:-An outside micrometer has a negative error. The correct reading can be taken by
A:-Adding the negative error in the actual reading.
B:-Deducting the negative error from the actual reading
C:-Adding twice the negative error in the actual reading.
D:-Deducting twice the negative error from the actual reading.
Correct Answer:- Option-A

Question #5:-Which type of taper is provided in the drill shank ?
A:-Pin taper
B:-Metric taper
C:-Morse taper
D:-Jerno taper
Correct Answer:- Option-C

Question #6:-Why the cutting faces of files are slightly bellied on lengthwise ?
A:-Get proper grip over workpiece
B:-Filing flat surfaces is made easier
C:-Permit clearance between file face and the workpiece
D:-Ensure more pressure on workpiece while filing
Correct Answer:- Option-B

Question #7:-Which one of the following sheets is used for making highly corrosive acid tanks ?
A:-Black iron sheets
B:-Galvanised iron sheets
C:-Stainless steel sheets
D:-Lead sheets
Correct Answer:- Option-D

Question #8:-What is the use of feeler gauge ?
A:-Check the width
B:-Check the height
C:-Check the length
D:-Check the gap between the mating parts
Correct Answer:- Option-D

Question #9:-Which type of screw threads are rounded at the crest and root ?
A:-B.A. thread
B:-B.S.F. thread
C:-B.S.W. thread
D:-A.C.M.E. thread
Correct Answer:- Option-B
Question #10:-Which tool is used for trimming the edges of a sheet metal cylinder ?
A:-Straight snips
B:-Bent snips
C:-Tube cutter
D:-Scissors
Correct Answer:- Option-B

Technician Grade II (Refrigeration Mechanic) Recruitment Exam Solved Question Paper Page 2 Question No. 11-20

Question #11:-The diode used for voltage regulation is
A:-Rectifier diode
B:-Zener diode
C:-Signal diode
D:-Varicap diode
Correct Answer:- Option-B
Question #12:-Which tool is used for bending, seaming and forming of sheet metal ?
A:-Bench vice
B:-Hand vice
C:-Stakes
D:-Shear
Correct Answer:- Option-C

Question #13:-One of the functions of electrode coating is
A:-To increase welding current
B:-To stabilize the arc
C:-To prevent rusting
D:-To control arc temperature
Correct Answer:- Option-B

Question #14:-The correct flame for preheating before cutting is
A:-Oxidizing flame
B:-Neutral flame
C:-Carburizing flame
D:-Slightly carburizing flame
Correct Answer:- Option-B
Question #15:-What is the tool used to remove slag from the welding ?
A:-Tongs
B:-Chipping hammer
C:-Cross pean hammer
D:-Ball pean hammer
Correct Answer:- Option-B
Question #16:-Which motor has the least starting torque ?
A:-CSIR
B:-CSR
C:-RSIR
D:-PSC
Correct Answer:- Option-C
Question #17:-The squirel cage three phase induction motor is started by
A:-DOL starter
B:-Star Delta starter
C:-Both (1) and (2)
D:-Stator-Rotor starter
Correct Answer:- Option-C
Question #18:-Which electronic component is the voltage regulator ?
A:-Zener diode
B:-Transistor
C:-Triac
D:-Diac
Correct Answer:- Option-A
Question #19:-Which gas is produced by the chemical reaction of carbide and water ?
A:-Oxygen
B:-Nitrogen
C:-Acetylene
D:-Carbondioxide
Correct Answer:- Option-C
Question #20:-A flaring tool consist of
A:-Flaring block and yoke
B:-Flaring cone and block
C:-Flaring bush and cone
D:-Flaring cone and yoke
Correct Answer:- Option-A

Technician Grade II (Refrigeration Mechanic) Recruitment Exam Solved Question Paper Page 3 Question No. 21-30

Question #21:-The size of tube cutter can be specified by
A:-Length of tube cutter
B:-Cutting wheel size
C:-Maximum diameter of tube which it can cut
D:-Cutting wheel thickness
Correct Answer:- Option-C
Question #22:-A lever type tube bender can form bends up to
A:-90°
B:-135º
C:-45º
D:-180º
Correct Answer:- Option-D
Question #23:-Pinching tool is used for
A:-Enlarging copper tube ends
B:-Remove burrs from tube end
C:-Sealing or closing the copper tubes
D:-Fixing copper tubes in swaging tool
Correct Answer:- Option-C
Question #24:-Heat required to increase the temperature of 1 gram of water by 1 degree centigrade is called
A:-Calorie
B:-BTU
C:-CHU
D:-None of these
Correct Answer:- Option-A
Question #25:-The boiling point of water in Fahrenheit scale is
A:-100º
B:-232º
C:-212°
D:-32º
Correct Answer:- Option-C
Question #26:-The freezing point of mercury is
A:-− 45ºC
B:-– 39ºC
C:-– 4ºC
D:-– 20ºC
Correct Answer:- Option-B
Question #27:-The heat required for changing the state of any object without changing its temperature is called
A:-Sensible heat
B:-Latent heat
C:-Specific heat
D:-None of these
Correct Answer:- Option-B
Question #28:-Which thermodynamic law presents the concept of temperature ?
A:-Zeroth law
B:-First law
C:-Second Law
D:-Third law
Correct Answer:- Option-A
Question #29:-Dry ice is
A:-Solid carbon dioxide
B:-Solid nitrogen
C:-Solid hydrogen
D:-Solid oxygen
Correct Answer:- Option-A
Question #30:-The liquid refrigeration system is also called
A:-Chemical refrigeration system
B:-Expandable refrigeration system
C:-Water vapour system
D:-Both (1) and (2)
Correct Answer:- Option-D

Technician Grade II (Refrigeration Mechanic) Recruitment Exam Solved Question Paper Page 2 Question No. 31-40

Question #31:-In vapour absorption system which energy is used ?
A:-Mechanical energy
B:-Heat energy
C:-Chemical energy
D:-Potential energy
Correct Answer:- Option-B
Question #32:-The cylinder volume between TDC and BDC is known as
A:-Clearance volume
B:-Total volume
C:-Swept volume
D:-All of these
Correct Answer:- Option-C
Question #33:-In natural cooling tower, its sides are
A:-Closed
B:-Opened
C:-Partially opened
D:-None of these
Correct Answer:- Option-B
Question #34:-An example of dynamic compressor is
A:-Rotary vane compressor
B:-Reciprocating compressor
C:-Rotary scroll compressor
D:-Centrifugal compressor
Correct Answer:- Option-D
Question #35:-Rotary screw compressor is used for industrial and commercial applications with a capacity range of
A:-5 to 10 tons
B:-20 to 750 tons
C:-11 to 15 tons
D:-Above 1000 tons
Correct Answer:- Option-B
Question #36:-The size of the gasket specified by its
A:-Material
B:-Thickness
C:-Strength
D:-Both (1) and (3)
Correct Answer:- Option-B
Question #37:-The main disadvantage of water cooled condenser is
A:-Expensive
B:-Low heat transfer rate
C:-Used in low capacity plants
D:-They have fans mounted in them
Correct Answer:- Option-A
Question38:-The condenser both air and water used as cooling medium is
A:-Evaporative condenser
B:-Plate type condenser
C:-Shell and coil condenser
D:-Shell and tube condenser
Correct Answer:- Option-A
Question #39:-The efficiency of condenser increases due to
A:-De scaling
B:-Scaling
C:-Painting
D:-Both (2) and (3)
Correct Answer:- Option-A
Question #40:-The device which divides the high pressure side and the low pressure side of a refrigerating system is known as
A:-Condenser
B:-Evaporator
C:-Receiver
D:-Expansion device
Correct Answer:- Option-D

Technician Grade II Refrigeration Mechanic Recruitment Exam Solved Question Paper download Page 5 Question No. 41-50

Question #41:-In hard water the calcium carbonate contents is
A:-Less than 60 PPM
B:-120 to 180 PPM
C:-More than 180 PPM
D:-60 to 120 PPM
Correct Answer:- Option-B
Question #42:-The difference between the cooling tower water inlet and outlet temperature is known as
A:-Approach
B:-Blow down
C:-Range
D:-Efficiency
Correct Answer:- Option-C
Question #43:-Thermostatic expansion valves are generally set for a super heat of around
A:-10 to 15ºC
B:-0 to 3ºC
C:-4.4 to 5.5ºC
D:-16 to 20ºC
Correct Answer:- Option-C
Question #44:-In which type of expansion valve has high efficiency ?
A:-Capillary Tube
B:-Automatic expansion valve
C:-Hand expansion valve
D:-Thermostatic expansion valve
Correct Answer:- Option-D
Question #45:-The location of an expansion valve in a system is
A:-Between condenser and drier
B:-Between compressor and condenser
C:-Between evaporator and accumulator
D:-Between liquid receiver and evaporator
Correct Answer:- Option-D
Question #46:-The evaporator is also known as
A:-Chilling coil
B:-Freezing coil
C:-Cooling coil
D:-All of the above
Correct Answer:- Option-D
Question #47:-The evaporator which is used in high capacity refrigeration systems is
A:-Dry expansion evaporator
B:-Plate surface evaporator
C:-Flooded evaporator
D:-Bare tube evaporator
Correct Answer:- Option-C
Question #48:-Which process is done first in split AC for shifting from one place to another ?
A:-Flushing
B:-Evacuation
C:-Pump down
D:-Vacuumisation
Correct Answer:- Option-C
Question #49:-A compressor coupled to a motor externally is called
A:-Sealed compressor
B:-Semi sealed compressor
C:-Open type compressor
D:-None of the above
Correct Answer:- Option-C
Question #50:-Which extinguishes the fire of flammable liquids ?
A:-Water
B:-Air
C:-𝐶𝑂2
D:-Oil
Correct Answer:- Option-C

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