ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: How many different groups of refrigerants are there?

  • 11
  • 3
  • 15
  • 7

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

  • Magnesium
  • Zinc
  • Copper
  • Nickel

3: 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.
  • you can never change refrigerants
  • Place sign, check for leaks, and insulate suction line
  • Nothing must be done

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

  • relief valve
  • bleed valve
  • service valve
  • condenser

5: 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

6: 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

7: Halogen refrigerants are corrosive to which type of metal?

  • stainless steel
  • black iron
  • copper
  • magnesium

8: Which of the following is an inorganic refrigerant?

  • R-22
  • Ammonia
  • Chlorofluorocarbons
  • All of the above

9: Class 3 refrigerants are

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

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

  • 100
  • 1
  • 10
  • 50

11: What is not a requirement of a class T machine room?

  • tight fitting doors
  • self-closing doors
  • fire hose connection to the building fire protection system
  • automatic ventilation

12: Institutional occupancy is

  • a premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space.
  • a premise or that portion of a premise from which, because they are disabled, debilitated, or confined, occupants cannot readily leave without the assistance of others.
  • a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
  • None of the above

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

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

14: R-12. R-22, and R-40 are considered Group I refrigerants.

  • True
  • False

15: When a receiver is greater than 3 cubic feet but less than 10 cubic feed, what is the minimum relief device required?

  • fusible plug
  • relief valve
  • rupture disc
  • all of the above

16: There can be no airflow from an occupied space through a machine room unless what?

  • System is high velocity
  • System is ducted and sealed
  • Duct is not located in the ceiling
  • None of the above.

17: All machine rooms must be outfitted with a detector that _______?

  • activates an audible alarm
  • activates a visual alarm
  • starts the ventilation system
  • All of the above

18: What would be the classification of a church?

  • Institutional
  • Large mercantile
  • Place of assembly
  • Industrial

19: Pressure vessels of 10 cubic feet or more gross volume shall use

  • at least one rupture member
  • a dual pressure-relief valve if charging into the atmosphere
  • at least three means of discharge and/or rupture discs
  • both a and b are correct

20: What refrigerant doesn't have to be classifted?

  • R-711
  • R-718
  • R-717
  • R-134a

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

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

22: When systems are protected by a high pressure relief device, the compressor's pressure limiting device shall be set at or below ____ % of the operating pressure of the high side relief device.

  • 80
  • 110
  • 100
  • 90

23: An example of direct system is

  • rooftop unit
  • chiller
  • absorber
  • none of the above

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

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

25: 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
  • 15
  • 25
  • 20