Topics: All categories in the pool
1: Institutional occupancy is
- a premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space.
- a premise or that portion of a premise from which, because they are disabled, debilitated, or confined, occupants cannot readily leave without the assistance of others.
- a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
- None of the above
2: Which of the following is NOT a positive displacement compressor?
- centrifugal
- scroll
- reciprocating
- screw
3: When systems are protected by a high pressure relief device, the compressor's pressure limiting device shall be set at or below ____ % of the operating pressure of the high side relief device.
- 80
- 90
- 100
- 110
4: Ammonia systems use ____ pressure to adjust oil pressure
- air
- stream
- liquid
- discharge
5: High side floats are used on centrifugal chiller systems are are considered critically charged systems.
- False
- are obsolete.
- True
- depends on the type of refrigerant being used
6: Two capacitors are wired in parallel. One capacitor has a value of 15uf. The other has a value of 25uf. What is the total value supplied?
- 25 uf
- 40 uf
- 15 uf
- 20 uf
7: When a refrigeration or air conditioning system is installed
- it shall not be operated below prescribed pressures
- a field inspection shall be made before it is put into service
- it shall be approved by the owner for proper operation.
- the form of certificate shall be authorized by the Department of Pubic safety
8: Laten heat is associated with a change in state of a refrigerant but not temperature
- True
- False
9: The formula for Pure Power in a resistance circuit is
- Watts X amps.
- Watts X power factor
- Kw = volts X amps
- Watts = volts X amps
10: When using nitrogen for brazing, the pressure should be:
- 125 psig
- 50-100 psig
- Slightly below atmospheric
- Very low
11: What does safe access mean?
- Well-lit exit signs
- A clear unobstructed path to the equipment and controls
- Locked doors
- OSHA approved
12: Gauge pressure is
- force of pressure above that of atmospheric
- atmospheric pressure
- what a gauge reads when checking pressures on a chilled water system.
- absolute pressure
13: High pressure controls should be set no higher than
- 10% of set point
- 90% of set point
- 25% of set point
- 80% of set point
14: How much refrigerant can be stored in a mechanical room outside of the system?
- 330
- 100
- 150
- 200
15: The leaving chilled water set point for comfort cooling is typically?
- 66
- 45
- 60
- 38
16: A High-Probablity system
- is such that a leak of refrigerant from failed connections will enter the occupied space
- is such that any leak will cause injury or death to anyone within a 100 square foot area
- is such that a leak of refrigerant from failed connections will enter the unoccupied space
- is a system highly likely to leak from a failed connection or component of such system
17: A rule of thumb in air conditioning is ____ CFM per ton?
- 500
- 100
- 600
- 400
18: While water is evaporated in an evaporative condenser the impurities which were in the water are
- blown to the atmosphere by the fan
- washed out of the air by the spray pump
- accumulate in the sump water
- remain in the air
19: Thermodynamics is the branch of science that deals with
- molecular therory
- state of energy
- heat energy
- energy due to motion
20: In an electrical circuit, what is potential measured in?
- Herys
- Volts
- Ohms
- Amps
21: A chilled water pump's suction gauge reads 10 psig. The discharge gauge reads 48 psig. What is the head in feet the pump is working against?
- 88
- 96
- 58
- 38
22: "I" represents _______ in the Watt's law formula.
- reactance
- watts
- amperage
- voltage
23: B3 refrigerants are considered
- non-toxic but non-flammable
- non-toxic but flammable
- toxic and highly flammable
- toxic but non-flammable
24: A positive displacement compressor is
- a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
- where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI
- is a reciprocating type compressor with 2 or more pistons
- a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber
25: Trichlorofluoromethane is the name of what refrigerant?
- R-113
- R-12
- R-502
- R-11