ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Low temperature systems should have what?

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

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

  • B-2
  • A-3
  • A-1
  • C-3

3: When is the only time you can leave a service container attached to a system?

  • Leaking system
  • Recovery
  • Charging
  • Both b and c

4: What type of copper is not permitted on refrigeration systems?

  • Type L
  • Type M
  • Type N
  • Type K

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

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

6: Doors communicating with outside from a mechanical room must be?

  • Self-closing, aligned, fire door
  • Self-closing, wooden, fire door
  • Steel, approved, weather-stripped
  • Self-closing, approved, fire door

7: Ashrae states that the equipment on a building needs to conform to adjacent buildings classifications when within ____ feet from opening and intakes.

  • 20
  • 15
  • 50
  • 75

8: 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.

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

9: When a refrigerating machinery room is used, the emergency procedures shall be posted

  • on a conspicuous card located near the evaporator
  • on a conspicuous card located near the compressor
  • outside the room, immediately adjacent to each door
  • inside the room, immediately adjacent to each door

10: Most CFC's are

  • toxic
  • inert but toxic
  • flammable
  • inert

11: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?

  • T&P device
  • Relief valve
  • Temperature limiter device
  • Circuit Breaker

12: Class A refrigerants are considered

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

13: When an inspection is needed, how often must it be done?

  • every 36 months
  • every 18 months
  • annually
  • every 24 months

14: R-22 is considered a(n)

  • HFC
  • HCFC
  • CFC
  • HCFCH

15: A premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space such as auditoriums, ballrooms, classrooms, passenger depots, restaurants, and theaters is considered a(n)

  • public assembly occupancy
  • institutional occupancy
  • illegal occupancy
  • commercial occupancy

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

  • 80%
  • 90%
  • 100%
  • 75%

17: There can be no airflow from an occupied space through a machine room unless what?

  • System is high velocity
  • System is ducted and sealed
  • Duct is not located in the ceiling
  • None of the above.

18: Joints in piping for refrigeration containing parts must withstand temperatures of ___?

  • 700F
  • 600F
  • 800F
  • 1000F

19: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.

  • 2.0
  • 2.5
  • 3.0
  • 5.5

20: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?

  • 10,000
  • 100,000
  • 100
  • 1,000

21: How many different groups of refrigerants are there?

  • 11
  • 3
  • 15
  • 7

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

  • stainless steel
  • black iron
  • copper
  • magnesium

23: What refrigerant were phased out in 2004?

  • R-11
  • R-12
  • R-22
  • R-134a

24: What must be done to all doors and access points in duct work going through a mechanical room?

  • Must be hindged
  • Must be screwed shut
  • Must be sealed and gasketed
  • All of the above

25: How many CFMs are required per square foot of commercial office occupied space

  • 15 CFM
  • .5 CFM
  • 20 CFM
  • 5 CFM