Topics: ASHRAE/CMR
1: 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
2: R-22 is classified as a ____ refrigerant on the safety matrix.
- A-1
- A-2
- B-2
- B-1
3: A hotel is considered a _______ occupancy.
- institutional
- residential
- commercial
- mercantile
4: 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
5: Refrigerant piping crossing an open space that affords passageway in any building shall not be less than _____ feet above the floor unless piping is located against the ceiling.
- 9.00'
- 7.25'
- 8'4"
- 7.00'
6: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
- lower
- higher
- the same
- there is no Group B1 refrigerants
7: Doors communicating with outside from a mechanical room must be?
- Self-closing, aligned, fire door
- Steel, approved, weather-stripped
- Self-closing, approved, fire door
- Self-closing, wooden, fire door
8: What section of ASHRAE-15 governs pressure vessels?
- Section 7 ASHRAE-15 ASME VIII fired
- Section 9 ASHRAE-15 ASME VIII unfired
- OSHA
- Section 6 ASHRAE-34 ASME VIII unfired
9: A class B2 refrigerant is considered
- toxic and non-flammable
- toxic and somewhat flammable
- non-toxic and highly flammable
- non-toxic and non-flammable
10: The Board of Boilers adopts by reference
- the MACS Pressure Vessel Code of Massachusetts
- the 1997 ANSI/ASHRAE Safety Code
- Montreal Protocol Safety Code
- MSCA Code
11: How many flammability classifications are refrigerants in?
- 7
- 2
- 3
- 5
12: What is a Category "D" fluid?
- 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
- A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and design temperature is between -20F to 366F
13: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere
- 330
- 110
- 6.6
- 1,000
14: R-11 belongs to Group
- A-2
- A-1
- B-3
- B-1
15: Most CFC's are
- inert but toxic
- flammable
- toxic
- inert
16: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False
17: What is the refrigerant dichlorodifluoromethane?
- R-12
- R-134A
- R-123
- R-22
18: Ammonia can come in contact with _______ ?
- Brass
- Copper tubing
- Aluminum
- Copper
19: What is an egress?
- A valve put on the low side of the system to prevent frosting
- An entrance or exit
- A code violation
- An escape route
20: A pressure relief should be located at least _______ from windows and doors.
- 20'
- 15'
- 25'
- 30'
21: What is an example of institutional occupancy?
- Hospital
- Football stadium
- Dorms
- Shopping mall
22: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 15
- 18
- 24
- 10
23: Who authorizes changes to the safety codes?
- Person in charge of the facility
- Contractor who last serviced the system.
- Person who pulled the permit
- Board of Boilers
24: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
25: When must refrigeration system covered by the code be inspected?
- Annually
- Upon installation
- Annually and when installed
- Not required