Topics: ASHRAE/CMR
1: A relief valve discharge capacity is rated in
- temperature minus pounds of air per second divided by release rate squared
- PSIG
- PSIA
- Pounds of air per minute.
2: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
- Class A machinery room
- Class T machinery room
- Class B machinery room
- Class M machinery room
3: When must refrigeration system covered by the code be inspected?
- Not required
- Annually and when installed
- Upon installation
- Annually
4: What must be done to refrigerant pipes before being buried?
- Certified
- Leaked checked
- Encased
- Coated
5: Trichlorofluoromethane is the name of what refrigerant?
- R-12
- R-502
- R-113
- R-11
6: Machinery rooms must be vented to ______?
- neutralizing tank
- outdoors
- unoccupied spaces
- basement
7: When is the only time you can leave a service container attached to a system?
- Leaking system
- Recovery
- Charging
- Both b and c
8: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above
9: No open flames are allowed in the machinery room unless?
- Approved by the authorized person
- Never can be allowed
- Approved by the installing contractor
- Only when combustion air is provided from outside of the machinery room
10: Ammonia belongs to Group
- A-1
- A-2
- B-1
- B-2
11: Most CFC's are
- inert but toxic
- toxic
- flammable
- inert
12: Pressure vessels with an internal volume of 3 cubic feet or more
- do not need pressure relief protection
- shall use pressure relief devices
- shall use pressure relief devices or fusible plugs
- shall use fusible plugs
13: How far from the ground does a relief valve need to be?
- At least 15' above grade
- At least 20' above grade
- At least 25' above grade
- Not more than 3' above grade
14: 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.
- Nothing must be done
- Place sign, check for leaks, and insulate suction line
- you can never change refrigerants
15: The 522 CMR 9.00 has adopted for reference ASHRAE ____
- III
- 15
- 25
- 10
16: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?
- Because it's cheap
- R-718 is not rated unlimited because it's a dangerous refrigerant
- Because it's a non-flammable refrigerant
- Because it's water
17: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.
- 550
- 350
- 100
- 50
18: 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
19: Stop valves shall not be permitted between the system and the
- relief valve
- condenser
- service valve
- bleed valve
20: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.
- 2
- 5
- 3
- 1
21: What must be done if refrigeration lines pass through a concrete floor?
- installed through a pipe casing
- leak checked
- moisture barrier
- insulated
22: The gauge thickness required on a CO2 tank construction is
- 5/16"
- 1/8"
- 3/32"
- 1/16"
23: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
- the return air ducted system
- the mechanical room housing the refrigeration system
- the outdoors
- Machinery rooms need not be vented
24: How many CFMs are required per square foot of commercial office occupied space
- 20 CFM
- 15 CFM
- 5 CFM
- .5 CFM
25: Dual-pressure relief devices should be installed on
- vessels of 10 cubic feet or more
- vessels of 10 cubic feet or less
- vessels of 3 cubic feet or less
- vessels of 3 cubic feet or more