ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: When should a relief valve start to function?

  • Two times it's working pressure
  • At it's set pressure
  • Before the purge station discharges
  • 10 psi before it's set pressure

2: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.

  • 22
  • 18
  • 33
  • 50

3: R-11 belongs to Group

  • B-1
  • A-2
  • B-3
  • A-1

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

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

5: Low temperature systems should have what?

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

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

  • A2
  • C3
  • A3
  • B2

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

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

8: Most CFC's are

  • inert but toxic
  • inert
  • flammable
  • toxic

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

  • magnesium
  • black iron
  • copper
  • stainless steel

10: An example of direct system is

  • rooftop unit
  • chiller
  • absorber
  • none of the above

11: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and

  • gas masks must be worn
  • explosion precautions must be taken
  • the owner shall be informed
  • no flames shall be permitted

12: What refrigerant doesn't have to be classifted?

  • R-134a
  • R-718
  • R-717
  • R-711

13: The Department that certifies the transportation of refrigerant is the

  • RSES
  • DOT
  • EPA
  • EPO

14: A restaurant is classified as a

  • large mercantile occupancy
  • public assembly occupancy
  • mixed occupancy
  • commercial occupancy

15: What type of material can't be used on the outlet of a relief valve?

  • Stainless steel
  • PVC
  • Magnesium alloy
  • Copper

16: 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
  • Never can be allowed
  • Approved by the installing contractor

17: When can recovered refrigerants be reused?

  • They can't
  • Only when used in original owner's equipment
  • Only if used in 30 days of recovery
  • None of the above

18: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the

  • first disconnect in
  • breaker panel in
  • load-side of the contactor in
  • 24 volt secondary side of the Class 2 transformer to the thermostat

19: What is Trichlorotrifluoromethane?

  • R-13
  • R-11
  • R-12
  • R-113

20: 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

21: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.

  • 1.5
  • 2.2
  • 1
  • 1.2

22: Who authorizes changes to the safety codes?

  • Person in charge of the facility
  • Contractor who last serviced the system.
  • Board of Boilers
  • Person who pulled the permit

23: Indirect systems using Group II refrigerants

  • shall be used in refrigeration system in excess of 1,000 lbs
  • shall be used in refrigeration system less than 1,000 lbs
  • shall have all refrigerant containing parts except piping, installed in a Class T machine room
  • shall be used for mechanical equipment only

24: 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.

  • 550
  • 100
  • 350
  • 50

25: What refrigerant is an inorganic compound?

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