ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: An example of direct system is

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

2: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.

  • the return air ducted system
  • Machinery rooms need not be vented
  • the mechanical room housing the refrigeration system
  • the outdoors

3: A class A3 refrigerant is considered

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

4: 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
  • 350
  • 50
  • 100

5: What type of pressure relief device is used on a CO2 system?

  • Fusible plug
  • Gate valve
  • Rupture disk
  • Glove valve

6: What is Trichlorotrifluoromethane?

  • R-113
  • R-13
  • R-12
  • R-11

7: When a refrigeration or air conditioning system is installed

  • the form of certificate shall be authorized by the Department of Pubic safety
  • it shall be approved by the owner for proper operation.
  • a field inspection shall be made before it is put into service
  • it shall not be operated below prescribed pressures

8: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.

  • True
  • False

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

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

10: What refrigerant is an inorganic compound?

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

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

  • 36
  • 18
  • 48
  • 24

12: All serviceable components of a refrigeration system shall be provided with

  • name plates with markings referring to pressure and temperature in accordance with ASME Boiler and Pressure Vessel Code
  • manufactures instructions on start-up procedures
  • safe access
  • service manuals

13: R-22 is classified as a ____ refrigerant on the safety matrix.

  • A-2
  • B-2
  • A-1
  • B-1

14: According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into

  • the low-pressure side of the system
  • the high side of the system
  • the liquid receiver
  • both a and c are correct

15: How far from the window does a relief valve need to be according to ASHRAE-15?

  • There is no minimum for relief valve and windows.
  • At least 20'
  • At least 40'
  • At least 30'

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

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

17: Pipe identification labels are required when the system contains more than

  • 55 lbs
  • 65 lbs
  • 120 lbs
  • 110 lbs

18: When should a relief valve start to function?

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

19: A relief valve shall be located at least ___ above grade.

  • 25'
  • 10'
  • 15'
  • 36'

20: How many refrigerant classifications are there for flammability?

  • 3
  • 7
  • 2
  • 1

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: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants

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

23: Stop valves shall not be permitted between the system and the

  • condenser
  • relief valve
  • bleed valve
  • service valve

24: A High-Probablity system

  • is such that any leak will cause injury or death to anyone within a 100 square foot area
  • is a system highly likely to leak from a failed connection or component of such system
  • is such that a leak of refrigerant from failed connections will enter the unoccupied space
  • is such that a leak of refrigerant from failed connections will enter the occupied space

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

  • 50
  • 10
  • 100
  • 1