ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

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

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

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

  • Nickel
  • Zinc
  • Copper
  • Magnesium

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

  • 18
  • 36
  • 48
  • 24

4: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?

  • Foot valve
  • Stop valve
  • Muffler
  • Moisture indicator

5: A Low-Probability System

  • is such that a leak of refrigerant from a failed connection will enter the occupied space
  • is a system highly likely to leak form a failed connection or component of such system
  • is such that any leak will cause injury or death to anyone within a 100 square foot area
  • is such that a leak of refrigerant from a failed connection can not enter the occupied space

6: R-22 is considered a(n)

  • HCFC
  • CFC
  • HFC
  • HCFCH

7: How many refrigerant classifications are there for flammability?

  • 2
  • 7
  • 1
  • 3

8: Liquid level gauges must be provided with what?

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

9: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed

  • 330 lbs.
  • 550 lbs
  • 660 lbs
  • 55 lbs

10: What is an egress?

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

11: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.

  • True
  • False

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

  • 50
  • 100
  • 10
  • 1

13: Can you use Ammonia in industrial applications?

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

14: 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.

  • 20
  • 10
  • 15
  • 25

15: Defined process piping by code CMR (528)

  • Any piping that conveys a solid, liquid or gas that is not part of the plumbing or fire protection system
  • Any piping in an industrial space
  • Any piping in an industrial or commercial space
  • All of the above

16: A Category D fluid

  • is when the fluid handled is non flammable, nontoxic, and not damaging to human as defined in ANSI/ASME Process Piping.
  • is when the design pressure does not exceed 150 psi
  • a fluid for service piping in which the potential for personnel exposure is judged to cause harm and irreversible damage to those persons exposed to it
  • Both a and b are correct

17: 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
  • make sure it's compatible, notify owner, notify A.H.J
  • nothing must be done

18: A “U” or “UM” marking a on a nameplate of a pressure vessels signifies compliance with Section VIII of

  • the ASME Boiler and Pressure Vessel Code
  • Section 11.3.1.5 ASHRAE 15 Standard
  • the ANSI Standard 10.7.2
  • both the ANSI Standard 10.7.2 and ASHRAE 15 Standard 11.3.1.5

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

  • Magnesium alloy
  • Copper
  • Stainless steel
  • PVC

20: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.

  • shall not be prohibited
  • of Group B2 refrigerant shall be prohibited
  • shall be prohibited
  • containing R-11, R-123 & R-717 exclusively shall not be prohibited

21: Relief valves are rated in

  • gallons of water per minute
  • gallons of water per hour
  • pounds of air per hour
  • pounds of air per minute

22: What is the refrigerant chlorodifluoromethane?

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

23: What would be the classification of a church?

  • Institutional
  • Industrial
  • Large mercantile
  • Place of assembly

24: How many refrigerant classifications are there for toxicity?

  • 3
  • 1
  • 2
  • 5

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

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