Topics: All categories in the pool
1: A rule of thumb in air conditioning is ____ CFM per ton?
- 100
- 600
- 400
- 500
2: Liquid level gauges shall have _____________ with one exception being that of the liquid level gauge bull’s eye type.
- color-coded glass to determine type of refrigerant
- moisture indicators
- automatic closing shut-off valves
- All of the above
3: A check valve is a device
- designed to allow the flow of refrigerant gas in both directions
- that is always spring loaded
- with a pressure drop
- found on high pressure steam systems
4: When must refrigeration system covered by the code be inspected?
- Not required
- Upon installation
- Annually and when installed
- Annually
5: What is the leaving chilled water set point for water chiller systems?
- 38F
- 66F
- 55F
- 45F
6: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.
- 36
- 18
- 48
- 24
7: A moisture indicator must
- change color when exposed to moisture
- be yellow
- be filled with liquid
- be sight side up
8: Heat is a form of
- power
- work
- matter
- energy
9: A R-22 system running with a condensing temperature of 110F and a 40F evaporator temperature will read pressures of ____ on the high side and ____ on the low side.
- 257 psig, 77 psig
- 226 psig, 68 psig
- 350 psig, 120 psig
- 455 psig, 185 psig
10: The start winding has _____ turns than the run winding.
- more
- less
- the same
- none of the above
11: What is not a requirement of a Class T machine room?
- Automatic ventilation
- Fire hose connected to the building fire protection system.
- Self-closing doors
- Tight fitting doors
12: Low ambient controls are used when
- when systems run all year round
- economizers are used
- always
- on air conditioning systems only
13: A compressor that increases vapor pressure by changing the internal volume of the compression chamber is called?
- Low Pressure displacement
- Pressure induced displacement.
- Non-positive displacement
- Positive displacement
14: Heat cannot of itself, pass from a
- cold to a warmer body
- warm to a colder body
- state of hot energy to a state of cold energy
- None of the above
15: The best way to determine the voltage requirement for an electrical component is to
- read the nameplate data
- determine the capacity of the service panel
- check with the utility company
- read the voltage with a mulitmeter
16: The main cause of enacting the "no vending rule" of July 1st 1992 was
- global warming potential
- ozone depletion
- both a & b
- None of the above
17: A class B2 refrigerant is considered
- non-toxic and highly flammable
- toxic and non-flammable
- toxic and somewhat flammable
- non-toxic and non-flammable
18: When should a relief valve start to function?
- Before the purge station discharges
- At it's set pressure
- Two times it's working pressure
- 10 psi before it's set pressure
19: When a receiver is greater than 3 cubic feet but less than 10 cubic feed, what is the minimum relief device required?
- fusible plug
- relief valve
- rupture disc
- all of the above
20: With a 5/8" X 5/8" x 3/4" tee, what size is the center connection?
- 3/8"
- 3/4"
- 1/2"
- 5/8"
21: A High-Probability System
- is such that any leak will cause injury or death to anyone within a 100 square foot area
- is a system highly likely to leak form a failed connection or component of such system
- is such that a leak of refrigerant from a failed connection will enter the occupied space
- is such that a leak of refrigerant from a failed connection will enter an unoccupied space
22: All electrical work done on refrigeration systems must comply with
- Department of Energy
- ASHREA-15 Section 9.2.1
- OSHA
- NEC and Massachusetts Modifications
23: What would be the classification of a prison?
- Institutional
- Place of assembly
- Large mercantile
- Industrial
24: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
- 99%
- 90%
- 80%
- 75%
25: 1 Watt = ______ BTU's?
- 12
- 7.216
- 4.482
- 3.412