Topics: ASHRAE/CMR
1: R-410A is classified as a ____ refrigerant on the safety matrix.
- B-2
- A-2
- B-1
- A-1
2: According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into
- the low-pressure side of the system
- the high side of the system
- the liquid receiver
- both a and c are correct
3: When must refrigeration system covered by the code be inspected?
- Annually and when installed
- Not required
- Upon installation
- Annually
4: Relief valves are rated in
- gallons of water per hour
- pounds of air per hour
- gallons of water per minute
- pounds of air per minute
5: What was the main reason for enacting the no venting rule of July 1, 1992?
- Ozone depletion
- Green house effect
- Global warming potential
- All of the above
6: NH3 is
- ammonia
- lithium bromide
- R-508A
- R-718
7: What is the minimum size of the discharge pipe?
- Same size as the outlet of the relief valve
- One pipe size larger that the inlet of the relief valve
- Depends on size of manifold
- All of the above
8: A restaurant is classified as a
- commercial occupancy
- mixed occupancy
- large mercantile occupancy
- public assembly occupancy
9: Pressure relief valves shall be marked with the data from
- Section VIII Division of the ASME Boiler & Pressure Code
- Section XIII Division of the ASME Boiler & Pressure Code
- Section I Division VIII of ASME Boiler & Pressure Code
- Section IV Division of the ASME Boiler & Pressure Code
10: The main purpose of a refrigerant detector in a machinery room is to
- inform there is a refrigerant leak int he system
- detect toxins in the air caused by a refrigerant leak
- to set off an alarm when there is refrigerant present inside the room
- all of the above
11: What is the minimum height refrigeration piping should be placed against walls?
- 6'
- 72"
- 7.25'
- Ceiling height
12: What must be done to refrigerant pipes before being buried?
- Certified
- Leaked checked
- Encased
- Coated
13: What is Trichlorotrifluoromethane?
- R-11
- R-113
- R-13
- R-12
14: How far from the ground does a relief valve need to be?
- At least 20' above grade
- At least 25' above grade
- At least 15' above grade
- Not more than 3' above grade
15: What refrigerant were phased out in 2004?
- R-12
- R-11
- R-134a
- R-22
16: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
17: Halo-carbon refrigerants cannot be used with what material?
- Copper
- Aluminum
- Stainless Steel
- Magnesium alloy
18: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
- When there is a space 6' or more above it
- When its white
- When there are sprinklers above
- When it's used as part of a supply or return air system
19: A relief valve shall be located at least ___ above grade.
- 25'
- 36'
- 10'
- 15'
20: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
- lower
- the same
- there is no Group B1 refrigerants
- higher
21: Fusible plugs shall not be used with pressure vessels of
- 15 square feet or less
- 3 cubic feet or more
- 3 cubic feet or less
- 15 cubic feet or more
22: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.
- True
- False
23: What is an example of institutional occupancy?
- Football stadium
- Hospital
- Shopping mall
- Dorms
24: Indirect systems using Group II refrigerants
- shall be used for mechanical equipment only
- shall be used in refrigeration system less than 1,000 lbs
- shall be used in refrigeration system in excess of 1,000 lbs
- shall have all refrigerant containing parts except piping, installed in a Class T machine room
25: When a refrigeration or air conditioning system is installed
- a field inspection shall be made before it is put into service
- it shall be approved by the owner for proper operation.
- it shall not be operated below prescribed pressures
- the form of certificate shall be authorized by the Department of Pubic safety