ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: 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

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

2: What section of ASHRAE-15 governs pressure vessels?

  • Section 6 ASHRAE-34 ASME VIII unfired
  • Section 9 ASHRAE-15 ASME VIII unfired
  • Section 7 ASHRAE-15 ASME VIII fired
  • OSHA

3: 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

4: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested

  • annually
  • regularly
  • quarterly
  • bi-annually

5: Can ammonia be used on domestic system?

  • no, unless there is proper ventilation system installed
  • yes
  • no
  • yes, for systems under 10 tons

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

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

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

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

8: Ammonia can come in contact with _______ ?

  • Copper tubing
  • Aluminum
  • Brass
  • Copper

9: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.

  • the atmosphere
  • a de-pressurized recovery tank with a silver top and yellow bottom
  • a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
  • All of the above

10: 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

11: R-410A is classified as a ____ refrigerant on the safety matrix.

  • A-1
  • A-2
  • B-1
  • B-2

12: Who authorizes changes to the safety codes?

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

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

  • copper
  • magnesium
  • stainless steel
  • black iron

14: What refrigerant were phased out in 2004?

  • R-134a
  • R-12
  • R-22
  • R-11

15: What is the minimum size of the discharge pipe?

  • Same size as the outlet of the relief valve
  • One pipe size larger that the inlet of the relief valve
  • Depends on size of manifold
  • All of the above

16: Trichlorofluoromethane is the name of what refrigerant?

  • R-502
  • R-12
  • R-11
  • R-113

17: A relief valve discharge capacity is rated in

  • temperature minus pounds of air per second divided by release rate squared
  • Pounds of air per minute.
  • PSIA
  • PSIG

18: Fusible plugs must have what marked on them?

  • Melting temperature in F
  • Melting temperature in C
  • Opening pressure
  • All of the above

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

  • 48
  • 18
  • 24
  • 36

20: Before you change the type of refrigerant in a refrigeration system, what three things must be done?

  • place sign, check for leaks, insulate
  • nothing must be done
  • make sure it's compatible, notify owner, notify A.H.J
  • you can't change refrigerants

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

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

22: Where are the three places that the discharge from an ammonia relief valve be piped?

  • To chemical neutralizing tank only
  • Underground, into drain, into mechanical room
  • Atmosphere, Tank containing water, where the AHJ indicates.
  • None of the above.

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

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

24: How many gallons of water do you need per pound of ammonia?

  • 10
  • 50
  • 100
  • 1

25: The color code of a tank of ammonia is

  • silver
  • light green
  • white
  • lavender