ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

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

  • 80%
  • 75%
  • 90%
  • 100%

2: Direct systems using Group II refrigerants

  • shall be installed per instruction of the AHJ
  • shall be installed in Class T machinery rooms
  • shall not be used for air condition for human comfort
  • shall be allowed to be used for human comfort.

3: What was the main reason for enacting the no venting rule of July 1, 1992?

  • Ozone depletion
  • Green house effect
  • Global warming potential
  • All of the above

4: Pressure vessels with an internal volume of 10 cubic feet or more

  • shall use pressure relief devices
  • shall use fusible plugs
  • shall use rupture discs or duel pressure relief valves
  • shall use pressure relief devices or fusible plugs

5: Pressure vessels having an inside diameter of 6” or less shall be protected by

  • Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
  • either a fusible plug or a pressure relief device
  • a fusible plug
  • a pressure relief device

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

  • Magnesium alloy
  • Stainless steel
  • Copper
  • PVC

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

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

8: Dual-pressure relief devices should be installed on

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

9: Where a refrigeration or air conditioning system is installed,

  • it shall not be operated below prescribed pressuers
  • the form or certificate shall be authorized by the Department of Public Safety
  • The company who installed the system must notify the fire department in the jurisdiction where installed
  • A field inspection shall be made before it is put into service

10: 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 an unoccupied space
  • is such that a leak of refrigerant from a failed connection will enter the occupied space

11: _____ alloys shall not be used in contact with an halogenated refrigerants.

  • Copper
  • Nickel
  • Zinc
  • Magnesium

12: Name three things that must be done when changing refrigeration lubricant?

  • You can't change lubricants.
  • Place sign, check for leaks, insulate
  • Make sure it's compatible, notify owner, notify AHJ
  • Nothing must be done

13: The test pressure applied to the high side of each factory-assembled refrigerating system shall be at least equal to the design pressure of

  • 2.5 times the design pressure
  • the aggregate of the high side and low side
  • the low side
  • the high side

14: Doors communicating with outside from a mechanical room must be?

  • Steel, approved, weather-stripped
  • Self-closing, wooden, fire door
  • Self-closing, approved, fire door
  • Self-closing, aligned, fire door

15: What is not a requirement of a Class T machine room?

  • Fire hose connected to the building fire protection system.
  • Automatic ventilation
  • Tight fitting doors
  • Self-closing doors

16: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code

  • Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
  • over pressure protection as well as a temperature protection device
  • over pressure protection and a rupture disc
  • over pressure protection

17: Can you use Ammonia in industrial applications?

  • No, never
  • When mixed with R-718
  • Yes, always
  • Yes, Under certain condidtions

18: A positive displacement compressor is

  • is a reciprocating type compressor with 2 or more pistons
  • a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber
  • a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
  • where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI

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

  • compressor
  • evaporator
  • outside the machinery room
  • boiler

20: When an inspection is needed, how often must it be done?

  • every 18 months
  • annually
  • every 24 months
  • every 36 months

21: Ammonia can come in contact with _______ ?

  • Brass
  • Copper tubing
  • Copper
  • Aluminum

22: Liquid level gauges must be provided with what?

  • A red line
  • A relief valve
  • A low level mark
  • Automatic shut-offs

23: What refrigerant has zero ozone depletion

  • HFC
  • CFC
  • HCFC
  • None of the above

24: What is an egress?

  • An escape route
  • An entrance or exit
  • A valve put on the low side of the system to prevent frosting
  • A code violation

25: 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