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Refrigeration and Air Conditioning Technician
BASIC REFRIGERATION
Set 5
Set 5
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Q9755
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What is top dead centre in reciprocating compressor cylinder?
A
The piston moves down from the point of cylinder
B
The piston moves up from the point of cylinder
C
The piston stops in cylinder at bottom
D
The piston starts in cylinder at bottom
Q9756
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Which component controls the thermostat and defrost heater in frost free refrigerator?
A
Thermoheater
B
Defrost timer
C
Relay
D
OLP
Q9757
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What is the advantage of using flux in brazing?
A
Over heating
B
Melting tubes
C
Prevent Oxidation
D
Chemical reaction
Q9758
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Which compressor dome handles high pressure and high temperature vapour?
A
Semi hermetic reciprocating compressor
B
Open type reciprocating compressor
C
Hermetic reciprocating compressor
D
Hermetic rotary compressor
Q9759
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What is the absolute pressure of gas in a cylinder, if gauge reads 135.3 p.s.i?
A
130 p.s.i.a
B
140 p.s.i.a
C
150 p.s.i.a
D
160 p.s.i.a
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