ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: How many groups of refrigerants are there?

  • 1
  • 3
  • 7
  • 5

2: What pipe can not be used for refrigeration?

  • K
  • N
  • L
  • M

3: A High-Probability 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 form a failed connection or component of such system
  • is such that a leak of refrigerant from a failed connection will enter the occupied space
  • is such that a leak of refrigerant from a failed connection will enter an unoccupied space

4: When should a relief valve start to function?

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

5: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.

  • 100%
  • 90%
  • 75%
  • 80%

6: 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
  • high and low pressure controls
  • a refrigerant detector located in an area where the refrigerant from a leak will concentrate
  • a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate

7: 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
  • load-side of the contactor in
  • breaker panel in

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

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

9: Ammonia can come in contact with _______ ?

  • Aluminum
  • Brass
  • Copper tubing
  • Copper

10: A 3-cubic foot receiver must have what type of relief valve?

  • fusible plug
  • relief valve
  • rupture device
  • none of the above

11: Who is permitted to access a refrigeration machine room?

  • Contractors only
  • Anyone, it's a completely safe area
  • Any employee
  • Authorized persons only

12: What is the refrigerant dichlorodifluoromethane?

  • R-22
  • R-123
  • R-12
  • R-134A

13: System design pressures must take into consideration, not only, pressures found during normal operation but also what?

  • When it's cold out
  • When there is a malfunction on the high side
  • When its warm out
  • All of the above

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

  • A3
  • C3
  • B2
  • A2

15: Pressure vessels with an internal volume of 3 cubic feet or less

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

16: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.

  • UL and UR
  • UV or UR
  • UL and UM
  • UM or UL

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

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

18: Class A refrigerants are considered

  • non-flammable
  • toxic
  • non-toxic
  • flammable

19: Emergency shutdown procedures, including precautions to be observed in case of a breakdown or leak over 55 lbs of refrigerant charge, shall be displayed on a conspicuous card located as near as possible to the

  • outside the machinery room
  • compressor
  • boiler
  • evaporator

20: What is R-22?

  • HFC
  • Chlorodifluoromethane
  • CCFCM
  • Chlorofluoromethane

21: 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 40'
  • At least 30'
  • At least 20'

22: When a refrigeration or air conditioning system is installed

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

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

  • 10
  • 50
  • 1
  • 100

24: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8

  • low side of the system
  • the vapor side of the system
  • high side of the system
  • the liquid side of the system

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

  • A-2
  • B-1
  • B-2
  • A-1