ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Single compound Refrigerants are classified by what two criteria?

  • Temperature range and hazardousness
  • Flammability and temperature range
  • Weight and color
  • Flammability and toxicity

2: What is a Category "D" fluid?

  • A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and design temperature is between -20F to 366F
  • Any fluid that exceeds 150 psig and has design temperature of over 366F
  • A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily contact
  • A typical refrigerant used on newer air conditioning and heat pump ssytems

3: pressure relief valves must discharge to the atmosphere at a location not less than 15 feet from ground level and ____ feet from any window, ventilation opening, or exits of buildings.

  • 10
  • 20
  • 15
  • 25

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

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

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

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

6: Refrigerant restricted in 2004 but used for transition for decades:

  • R-123
  • R-22
  • R-134A
  • R-11

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

  • 10'
  • 25'
  • 15'
  • 36'

8: Each machinery room shall contain

  • smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements
  • a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
  • high and low pressure controls
  • a refrigerant detector located in an area where the refrigerant from a leak will concentrate

9: Which refrigerant replaced R-12?

  • R-407A
  • R-22
  • R-134A
  • R-410A

10: A relief valve discharge capacity is rated in

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

11: The discharge relief valve is located (9.4.6)

  • on top of the condensor
  • between the compressor and reciever
  • between the compressor and oil separator
  • between the compressor and the stop valve

12: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?

  • R-22
  • R-11
  • R-113
  • R-12

13: 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

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

  • bleed valve
  • condenser
  • service valve
  • relief valve

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

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

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

  • atmosphere, tank containing water, where the A.H.J. indicates
  • underground, into drain, into mechanical room
  • to chemical neutralizing tank only
  • none of the above

17: Ammonia can come in contact with _______ ?

  • Copper tubing
  • Brass
  • Aluminum
  • Copper

18: Can ammonia be used on domestic system?

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

19: When should a relief valve start to function?

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

20: What is the refrigerant chlorodifluoromethane?

  • R-123
  • R-134a
  • R-12
  • R-22

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

  • Copper
  • Stainless Steel
  • Aluminum
  • PVC

22: How much clearance do you need around the perimeter of electrical panels?

  • 24"
  • 36"
  • 18"
  • 12"

23: What refrigerant were phased out in 2004?

  • R-134a
  • R-11
  • R-12
  • R-22

24: Liquid level gauges shall have _____________ with one exception being that of the liquid level gauge bull’s eye type.

  • color-coded glass to determine type of refrigerant
  • moisture indicators
  • automatic closing shut-off valves
  • All of the above

25: R-22 is considered a(n)

  • HCFCH
  • HCFC
  • CFC
  • HFC