BASIC REFRIGERATION - Practice Mode

1) What is top dead centre in reciprocating compressor cylinder?

The piston moves down from the point of cylinder The piston moves up from the point of cylinder The piston stops in cylinder at bottom The piston starts in cylinder at bottom

Correct Answer: The piston moves down from the point of cylinder

2) Which component controls the thermostat and defrost heater in frost free refrigerator?

Thermoheater Defrost timer Relay OLP

Correct Answer: Defrost timer

3) What is the advantage of using flux in brazing?

Over heating Melting tubes Prevent Oxidation Chemical reaction

Correct Answer: Prevent Oxidation

4) Which compressor dome handles high pressure and high temperature vapour?

Semi hermetic reciprocating compressor Open type reciprocating compressor Hermetic reciprocating compressor Hermetic rotary compressor

Correct Answer: Hermetic rotary compressor

Explanation:

5) What is the absolute pressure of gas in a cylinder, if gauge reads 135.3 p.s.i?

130 p.s.i.a 140 p.s.i.a 150 p.s.i.a 160 p.s.i.a

Correct Answer: 150 p.s.i.a

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