Refrigeration Operator Exam Questions and Answers 100% Pass |Verified & Updated

Refrigeration Operator Exam Questions and
Answers 100% Pass |Verified & Updated
Question 1
When handling liquid refrigerants the operator must wear:
Correct Answer
Safety goggles



Question 2
What type of grease would you pick in a dry condition above 70 degrees C
Correct Answer
Sodium based



Question 3
The code that provides for the safe design, construction, installation, operation,
inspection, testing, and repair of refrigeration and air conditioning equipment and
systems

Correct Answer
B52 Code



Question 4
Pump is located below the source supply with the centreline of the pump
Correct Answer
Static suction head



Question 5
The thermal wheel works similar to what system
Correct Answer
A run around system




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,Question 6
Provides the safe design, construction, and installation of boilers and pressure vessels
Correct Answer
B51 Code



Question 7
Air pressure in a dynamic compressor is increased by
Correct Answer
Employing a series of stages



Question 8
Gate valves are used mainly for:
Correct Answer
On/off control



Question 9
In refrigeration systems, heat is _______ from the substance to be cooled
Correct Answer
Extracted



Question 10
Absolute pressure = Gauge pressure + ___________
Correct Answer
Atmospheric pressure



Question 11
A flexible reed valve will:
Correct Answer
Bend if higher than normal cylinder temperatures occur




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,Question 12
A substance at its saturation point is
Correct Answer
At its boiling point



Question 13
Device that compensates for axial and angular misalignment
Correct Answer
Flexible coupling



Question 14
The purpose of the lantern ring
Correct Answer
Distribute sealing water to packing



Question 15
Disadvantages of a mechanical seal
Correct Answer
Higher initial costs



Question 16
Eight kgs of copper is raised from 25 degrees C to 50 degrees C. Find the heat
required
Correct Answer
77.6 C



Question 17
A compressor provides ______ pressure discharge
Correct Answer
High




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, Question 18
Which pump is best used for pumping heavy viscous liquid
Correct Answer
Reciprocating



Question 19
Dehumidification of an air duct can be accomplished by
Correct Answer
Cooling the air to its dew point



Question 20
If louvres are actuated to increase the amount of outlet air, the return air louvres will:
Correct Answer
Close



Question 21
Oxygen is:
Correct Answer
colorless, tasteless, odorless gas



Question 22
Worn pump bearings will cause excessive wear on ______
Correct Answer
Packing



Question 23
What state is the refrigerant at the outlet of the condenser?
Correct Answer
High pressure, low temperature liquid




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