ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.

  • 48
  • 18
  • 24
  • 36

2: A pressure vessel having an inside diameter of 6” or less shall be sufficient to withstand ____times the pressure of the saturation temperature of the refrigerant or ____times the critical pressure of the refrigerant, whichever is less.

  • 3.0, 3.5
  • 2.5, 3.0
  • 6.6, 6.6
  • 2.5, 2.5

3: Ammonia can come in contact with _______ ?

  • Aluminum
  • Copper tubing
  • Brass
  • Copper

4: How many different groups of refrigerants are there?

  • 15
  • 11
  • 3
  • 7

5: Class A refrigerants are considered

  • non-toxic
  • flammable
  • toxic
  • non-flammable

6: Evaporators within 18" of a heating coil must be equipped with a

  • low limit control
  • pressure relief device
  • zone valve
  • high limit control

7: _____ and its alloys are suitable for use with ammonia systems.

  • Magnesium
  • Aluminum
  • Zinc
  • Copper

8: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?

  • Moisture indicator
  • Foot valve
  • Stop valve
  • Muffler

9: 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.

  • 350
  • 250
  • 400
  • 100

10: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.

  • 80%
  • 99%
  • 75%
  • 90%

11: High pressure controls should be set no higher than

  • 25% of set point
  • 80% of set point
  • 90% of set point
  • 10% of set point

12: The 522 CMR 9.00 has adopted for reference ASHRAE ____

  • 15
  • 25
  • III
  • 10

13: Each machinery room shall contain

  • smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements
  • a refrigerant detector located in an area where the refrigerant from a leak will concentrate
  • a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
  • high and low pressure controls

14: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a

  • mercantile occupancy
  • business occupancy
  • public assembly occupancy.
  • commercial occupancy

15: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.

  • 2
  • 1
  • 5
  • 3

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: What refrigerant has zero ozone depletion

  • HFC
  • CFC
  • HCFC
  • None of the above

18: No open flames are allowed in the machinery room unless?

  • Approved by the authorized person
  • Only when combustion air is provided from outside of the machinery room
  • Approved by the installing contractor
  • Never can be allowed

19: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.

  • there is no Group B1 refrigerants
  • the same
  • lower
  • higher

20: Which refrigerant replaced R-12?

  • R-410A
  • R-407A
  • R-134A
  • R-22

21: Liquid level gauges must be provided with what?

  • A relief valve
  • A red line
  • A low level mark
  • Automatic shut-offs

22: A room having machinery but no flame producing apparatus permanently installed and operated is considered a

  • Class T machinery room
  • Class M machinery room
  • Class B machinery room
  • Class A machinery room

23: The discharge relief valve is located (9.4.6)

  • on top of the condensor
  • between the compressor and reciever
  • between the compressor and oil separator
  • between the compressor and the stop valve

24: All machine rooms must be outfitted with a detector that _______?

  • activates an audible alarm
  • activates a visual alarm
  • starts the ventilation system
  • All of the above

25: _____ alloys shall not be used in contact with an halogenated refrigerants.

  • Nickel
  • Copper
  • Magnesium
  • Zinc