FOR THE RMO WRITTEN EXAM | 400
QUESTIONS | WITH COMPLETE SOLUTIONS!!
1 of 400
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2 of 400
Term
What do compound gauges measure?
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Positive and negative It's purpose is to cycle the
pressure. compressor on and off.
It is used to add and remove oil. It is a gas tight fitting.
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3 of 400
Term
What are the advantages of an automatic expansion valve?
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It is used to supply oil to the
It is not ideal and frankly too high.
bearings at start up.
, It maintains a constant
They are sized according to evaporator pressure, it's a
refrigerant tonnage and a pressure simple design and little could
drop through the valve that is go wrong and an excessive
acceptable. charge will have no effect.
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4 of 400
Term
What is a Zimmerli gauge used to measure?
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It is used to supply oil to the
As the suction pressure increases.
bearings at start up.
Turbines use sleeve bearings. It is used to measure vacuum.
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5 of 400
Term
How many wires are in a single phase 208 volt circuit?
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, A higher temperature supply. By keeping the suction valves open.
With seals made of metal and
3 total - 2 Hot and 1 ground.
carbon.
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6 of 400
Term
What system uses chilled water and brines to cool building spaces?
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A strong wind. Air and water.
It creates positive pressure to
Indirect systems.
eliminate shaft leakage.
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