ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: R-717 is

  • ammonia
  • trichloromethane
  • water
  • carbon dioxide

2: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a

  • commercial occupancy
  • mercantile occupancy
  • public assembly occupancy.
  • business occupancy

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

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

4: What refrigerant doesn't have to be classified?

  • R-717
  • R-422A
  • R-718
  • R-134A

5: Systems containing more than 110 pounds must have stop valves located at the

  • compressor suction inlet
  • compressor discharge outlet
  • receiver inlet and outlet
  • All of the above

6: 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

7: What type of pressure relief device is used on a CO2 system?

  • Fusible plug
  • Gate valve
  • Rupture disk
  • Glove valve

8: Evaporators within 18" of a heating coil must be equipped with a

  • high limit control
  • pressure relief device
  • low limit control
  • zone valve

9: High pressure controls should be set no higher than

  • 90% of set point
  • 80% of set point
  • 10% of set point
  • 25% of set point

10: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.

  • 2.2
  • 1
  • 1.2
  • 1.5

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

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

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

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

13: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?

  • Temperature limiter device
  • Circuit Breaker
  • T&P device
  • Relief valve

14: 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

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

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

16: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.

  • 24
  • 10
  • 18
  • 15

17: What type of relief valve is used on a CO2 system?

  • gate valve
  • glove disc
  • fusible plug
  • rupture disc

18: The dial of a pressure gauge, when installed on the high side of a system be graduated 1.2 times the designed pressure.

  • True
  • False

19: How many CFMs are required per square foot of commercial office occupied space

  • 15 CFM
  • .5 CFM
  • 20 CFM
  • 5 CFM

20: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?

  • Because it's a non-flammable refrigerant
  • Because it's cheap
  • R-718 is not rated unlimited because it's a dangerous refrigerant
  • Because it's water

21: When can recovered refrigerants be reused?

  • They can't
  • Only when used in original owner's equipment
  • Only if used in 30 days of recovery
  • None of the above

22: A class A3 refrigerant is considered

  • non-toxic but highly flammable
  • toxic and non-flammable
  • non-toxic and non-flammable
  • toxic and somewhat flammable

23: What type of copper is not permitted on refrigeration systems?

  • Type M
  • Type K
  • Type N
  • Type L

24: A room having machinery but no flame producing apparatus permanently installed and operated is considered a

  • Class B machinery room
  • Class M machinery room
  • Class T machinery room
  • Class A machinery room

25: What is a Category "M" fluid?

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