Topics: ASHRAE/CMR
1: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.
- shall not be prohibited
- shall be prohibited
- containing R-11, R-123 & R-717 exclusively shall not be prohibited
- of Group B2 refrigerant shall be prohibited
2: An example of direct system is
- rooftop unit
- chiller
- absorber
- none of the above
3: A premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space such as auditoriums, ballrooms, classrooms, passenger depots, restaurants, and theaters is considered a(n)
- commercial occupancy
- illegal occupancy
- public assembly occupancy
- institutional occupancy
4: A declaration test is needed when the system contains more than
- 65 lbs
- 110 lbs
- 55 lbs
- 120 lbs
5: What must be done if refrigeration lines pass through a concrete floor?
- insulated
- leak checked
- moisture barrier
- installed through a pipe casing
6: Can ammonia be used on domestic system?
- yes
- no
- yes, for systems under 10 tons
- no, unless there is proper ventilation system installed
7: Most CFC's are
- flammable
- inert
- inert but toxic
- toxic
8: R-22 is classified as a ____ refrigerant on the safety matrix.
- A-1
- B-1
- B-2
- A-2
9: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.
- HCFC-123
- Lithium bromide
- CFC-11
- ammonia
10: 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
11: A restaurant is classified as a
- commercial occupancy
- mixed occupancy
- large mercantile occupancy
- public assembly occupancy
12: What is the minimum height refrigeration piping should be placed against walls?
- 6'
- 72"
- 7.25'
- Ceiling height
13: Doors communicating with outside from a mechanical room must be?
- Self-closing, wooden, fire door
- Self-closing, approved, fire door
- Steel, approved, weather-stripped
- Self-closing, aligned, fire door
14: The 522 CMR 9.00 has adopted for reference ASHRAE ____
- 10
- 15
- III
- 25
15: Who approves containers for refrigerants?
- E.P.A
- D.O.E
- D.O.T
- D.O.D
16: Evaporators within 18" of a heating coil must be equipped with a
- high limit control
- pressure relief device
- low limit control
- zone valve
17: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants
- there is no Group B1 refrigerants
- lower
- the same
- higher
18: Halo-carbon refrigerants cannot be used with what material?
- Copper
- Aluminum
- Stainless Steel
- Magnesium alloy
19: Which refrigerant class listed below is the most flammable?
- A-1
- A-3
- C-3
- B-2
20: No open flames are allowed in the machinery room unless?
- Never can be allowed
- Approved by the authorized person
- Only when combustion air is provided from outside of the machinery room
- Approved by the installing contractor
21: How much clearance do you need around the perimeter of electrical panels?
- 24"
- 12"
- 18"
- 36"
22: Ammonia belongs to Group
- A-1
- B-1
- B-2
- A-2
23: What refrigerant is an inorganic compound?
- R-22
- R-132A
- Ammonia
- R-410A
24: Pressure limiting devices are not required for systems containing less then ________ refrigerants.
- 6.6 lbs
- 13.9 lbs
- 22 lbs
- 44 lbs
25: Which refrigerant class listed below is the most flammable?
- B2
- A3
- C3
- A2