ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

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

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

2: Which refrigerant class listed below is the most flammable?

  • A3
  • C3
  • A2
  • B2

3: What section governs pressure vessels?

  • OSHA
  • Section ASHREA 34
  • Section 1 ASHREA 15 ASME fired
  • Section 8 ASHREA 15 ASME unfired

4: Low temperature systems should have what?

  • High pour point
  • Low pour point
  • High viscosity
  • None of the above

5: 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

6: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere

  • 1,000
  • 330
  • 6.6
  • 110

7: A class B2 refrigerant is considered

  • toxic and non-flammable
  • non-toxic and non-flammable
  • non-toxic and highly flammable
  • toxic and somewhat flammable

8: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.

  • containing R-11, R-123 & R-717 exclusively shall not be prohibited
  • of Group B2 refrigerant shall be prohibited
  • shall not be prohibited
  • shall be prohibited

9: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?

  • When there are sprinklers above
  • When there is a space 6' or more above it
  • When it's used as part of a supply or return air system
  • When its white

10: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.

  • 50
  • 350
  • 550
  • 100

11: The certificate of inspection

  • shall be posted and protected from dirt, water, and other elements
  • shall be authorized by a notarized insurance company
  • shall be $20 and an additional fee of $1 for each tone above 20 tons
  • shall be posted on the compressor shell or electrical panel at the unit

12: Pressure vessels having an inside diameter of 6” or less shall be protected by

  • a fusible plug
  • a pressure relief device
  • either a fusible plug or a pressure relief device
  • Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified

13: All electrical work done on refrigeration systems must comply with

  • OSHA
  • NEC and Massachusetts Modifications
  • Department of Energy
  • ASHREA-15 Section 9.2.1

14: Halogen refrigerants are corrosive to which type of metal?

  • black iron
  • magnesium
  • stainless steel
  • copper

15: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.

  • 90%
  • 80%
  • 100%
  • 75%

16: The dial of a pressure gauge, when installed on the high side of a system be graduated 1.2 times the designed pressure.

  • True
  • False

17: 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.

  • 100
  • 250
  • 350
  • 400

18: Large mercantile occupancy is

  • a premise or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise
  • a premise or that portion of a premise where more than 200 persons congregate on levels above or below street level to purchase personal merchandise
  • a premise of that portion of a premise where more than 50 persons congregate on levels above of below street level to purchase personal merchandise.
  • a premise of that portion of a premise where more than 100 persons congregate on levels above of below street level to purchase personal merchandise.

19: What refrigerant is an inorganic compound?

  • R-410A
  • Ammonia
  • R-132A
  • R-22

20: What is an egress?

  • An escape route
  • An entrance or exit
  • A valve put on the low side of the system to prevent frosting
  • A code violation

21: Direct systems using Group II refrigerants

  • shall not be used for air condition for human comfort
  • shall be installed in Class T machinery rooms
  • shall be allowed to be used for human comfort.
  • shall be installed per instruction of the AHJ

22: 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

23: What would be the classification of a church?

  • Large mercantile
  • Industrial
  • Place of assembly
  • Institutional

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

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

25: Fusible plugs shall not be used with pressure vessels of

  • 15 cubic feet or more
  • 15 square feet or less
  • 3 cubic feet or less
  • 3 cubic feet or more