ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: A relief valve discharge capacity is rated in

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

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

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

3: When must refrigeration system covered by the code be inspected?

  • Not required
  • Annually and when installed
  • Upon installation
  • Annually

4: What must be done to refrigerant pipes before being buried?

  • Certified
  • Leaked checked
  • Encased
  • Coated

5: Trichlorofluoromethane is the name of what refrigerant?

  • R-12
  • R-502
  • R-113
  • R-11

6: Machinery rooms must be vented to ______?

  • neutralizing tank
  • outdoors
  • unoccupied spaces
  • basement

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

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

8: What refrigerant has zero ozone depletion

  • HFC
  • CFC
  • HCFC
  • None of the above

9: No open flames are allowed in the machinery room unless?

  • Approved by the authorized person
  • Never can be allowed
  • Approved by the installing contractor
  • Only when combustion air is provided from outside of the machinery room

10: Ammonia belongs to Group

  • A-1
  • A-2
  • B-1
  • B-2

11: Most CFC's are

  • inert but toxic
  • toxic
  • flammable
  • inert

12: Pressure vessels with an internal volume of 3 cubic feet or more

  • do not need pressure relief protection
  • shall use pressure relief devices
  • shall use pressure relief devices or fusible plugs
  • shall use fusible plugs

13: How far from the ground does a relief valve need to be?

  • At least 15' above grade
  • At least 20' above grade
  • At least 25' above grade
  • Not more than 3' above grade

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

  • Make sure its compatible, notify owner, and notify AHJ.
  • Nothing must be done
  • Place sign, check for leaks, and insulate suction line
  • you can never change refrigerants

15: The 522 CMR 9.00 has adopted for reference ASHRAE ____

  • III
  • 15
  • 25
  • 10

16: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?

  • Because it's cheap
  • R-718 is not rated unlimited because it's a dangerous refrigerant
  • Because it's a non-flammable refrigerant
  • Because it's water

17: 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
  • 100
  • 50

18: Pressure vessels nameplate markings must be compliant with the

  • ASHRAE 34 Standards
  • CMR-588 & CMR-528
  • ASME Boiler and Pressure Vessel Code
  • All of the Above

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

  • relief valve
  • condenser
  • service valve
  • bleed valve

20: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.

  • 2
  • 5
  • 3
  • 1

21: What must be done if refrigeration lines pass through a concrete floor?

  • installed through a pipe casing
  • leak checked
  • moisture barrier
  • insulated

22: The gauge thickness required on a CO2 tank construction is

  • 5/16"
  • 1/8"
  • 3/32"
  • 1/16"

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

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

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

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

25: Dual-pressure relief devices should be installed on

  • vessels of 10 cubic feet or more
  • vessels of 10 cubic feet or less
  • vessels of 3 cubic feet or less
  • vessels of 3 cubic feet or more