Topics: All categories in the pool
1: The 522 CMR 9.00 has adopted for reference ASHRAE ____
- 15
- 25
- 10
- III
2: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants
- lower
- there is no Group B1 refrigerants
- higher
- the same
3: 14.7 psia is equivalent to
- atmospheric pressure at seal level
- 29.92" Hg
- 0 psig
- All of the above.
4: Clearance volume
- affects compressor capacity
- varies depending on compressor speed
- has no effect on compressor capacity
- is the same on all compressors
5: Pressure vessels with an internal volume of 10 cubic feet or more
- shall use fusible plugs
- shall use pressure relief devices
- shall use rupture discs or duel pressure relief valves
- shall use pressure relief devices or fusible plugs
6: With a 5/8" X 5/8" x 3/4" tee, what size is the center connection?
- 1/2"
- 5/8"
- 3/8"
- 3/4"
7: How many groups of refrigerants are there?
- 5
- 7
- 1
- 3
8: A solder joint melts at temperatures of
- 600F to 900F
- 400F to 800F
- less than 400F
- 1,200F to 1,500F
9: Gauge pressure is
- Barometric pressure
- Atmospheric pressure
- Force of pressure above that of atmosphere
- Absolute pressrue
10: On a single phase motor, when does the start winding cut out?
- At 75% of its full rated speed
- At 50% of its full rated speed
- At 25% of its full rated speed
- Start windings do no cut-out of the run cycle
11: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.
- 48
- 36
- 18
- 24
12: Which is the lowest vacuum?
- 5" hg
- 10 psia
- 5 psig
- 1,000 Microns
13: A restaurant is classified as a
- public assembly occupancy
- commercial occupancy
- large mercantile occupancy
- mixed occupancy
14: What is the minimum height refrigeration piping should be placed against walls?
- 72"
- 7.25'
- 6'
- Ceiling height
15: What is the voltage of each leg to ground of a three-phase motor with a 460v supply voltage?
- 208v
- 120v
- 277v
- 240v
16: Large Mercantile occupancy is a premise or that portion of a premise where more than ____ persons congregate on levels above or below the street level to purchase personal merchandise.
- 250
- 350
- 100
- 400
17: A relief valve discharge capacity is rated in
- temperature minus pounds of air per second divided by release rate squared
- PSIG
- Pounds of air per minute.
- PSIA
18: What is a megaohm meter?
- An electric meter that measures very high resistance values by sending a high DC voltage signal into the object being tested
- Is an electric meter that measures extremely low resistance valves by sending high DC voltage signal into the object being tested.
- An electric meter used by electricians to test large 3-phase blower motors for the correct rotation
- An electric meter that measures very high resistance values by sending a low voltage AC signal into the object being tested
19: A motor starter contains a thermal overload and a
- contactor
- solenoid
- transformer
- 3-way relay
20: Whoever owns/uses a refrigeration or air conditioning system covered by this code
- must notify the Department of Public Safety prior to starting the system
- shall be licensed by the Commonwealth of Massachusetts according to CMR 522
- shall make application for inspections to the Chief of Inspectors
- None of the above
21: A start capacitor in series with a start winding will
- increase the amp draw of the motor
- decrease the amp draw of the motor
- increase running efficiency
- increase starting torque
22: The leaving chilled water set point for comfort cooling is typically?
- 60
- 45
- 38
- 66
23: When should a relief valve start to function?
- At it's set pressure
- 10 psi before it's set pressure
- Before the purge station discharges
- Two times it's working pressure
24: A relief valve shall be located at least ___ above grade.
- 10'
- 36'
- 25'
- 15'
25: Total heat of a substance is considered
- empathetical
- enthalpy
- specific heat
- sensible heat