Topics: ASHRAE/CMR
1: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- UL and UM
- UM or UL
- UV or UR
- UL and UR
2: 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
3: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.
- True
- False
4: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 15
- 18
- 24
- 10
5: Where a refrigeration or air conditioning system is installed,
- it shall not be operated below prescribed pressuers
- 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
- the form or certificate shall be authorized by the Department of Public Safety
6: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?
- A group sensing
- refrigerant sensing
- phosgene gas sening
- CO Sensing
7: How many refrigerant classifications are there for toxicity?
- 2
- 3
- 5
- 1
8: 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
9: 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
10: How are refrigerant blends classified?
- Based on best case Fractionation
- Based on worst case fractionation
- Blends don't have to be classified
- Based on the oil used
11: R-22 falls under which safety classification?
- A-1
- B-1
- A-2
- B-2
12: Pressure vessels having an inside diameter of 6” or less shall be protected by
- Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
- either a fusible plug or a pressure relief device
- a fusible plug
- a pressure relief device
13: Setting a pressure relief device shall not exceed ___ of the design pressure
- 75%
- 80%
- 90%
- 100%
14: What pipe can not be used for refrigeration?
- K
- M
- L
- N
15: System design pressures must take into consideration, not only, pressures found during normal operation but also what?
- When it's cold out
- When there is a malfunction on the high side
- When its warm out
- All of the above
16: Direct systems using Group II refrigerants
- shall be installed per instruction of the AHJ
- shall be installed in Class T machinery rooms
- shall be allowed to be used for human comfort.
- shall not be used for air condition for human comfort
17: What happens after your initial inspection of a pressure vessel?
- Inspector leaves a metal tag with a certification listed on it
- Notify the AHJ to let them know that the system been inspected
- Notify the Fire Marshal that the system has been inspected and approved
- There is a temporary shut-down until a final inspection can be performed.
18: Evaporators within 18" of a heating coil must be equipped with a
- pressure relief device
- high limit control
- low limit control
- zone valve
19: A professional or office building would be considered what type of occupancy?
- mercantile
- business
- public assembly
- commercial
20: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.
- the atmosphere
- a de-pressurized recovery tank with a silver top and yellow bottom
- a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
- All of the above
21: Pressure vessels with an internal volume of 3 cubic feet or more
- shall use fusible plugs
- shall use pressure relief devices
- shall use pressure relief devices or fusible plugs
- do not need pressure relief protection
22: The color code of a tank of ammonia is
- white
- light green
- silver
- lavender
23: Joints in refrigeration piping must be _____ before being covered?
- Leak tested
- Pressurized
- Inspected
- Insulated
24: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered
- commercial occupancy
- public assembly occupancy
- mixed occupancy
- institutional occupancy
25: Fusible plugs shall not be used with pressure vessels of
- 15 square feet or less
- 15 cubic feet or more
- 3 cubic feet or more
- 3 cubic feet or less