Topics: ASHRAE/CMR
1: The dial of a pressure gauge, when installed on the high side of a system be graduated 1.2 times the designed pressure.
- True
- False
2: Single compound Refrigerants are classified by what two criteria?
- Flammability and toxicity
- Temperature range and hazardousness
- Weight and color
- Flammability and temperature range
3: 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
4: What section governs pressure vessels?
- Section 1 ASHREA 15 ASME fired
- Section ASHREA 34
- Section 8 ASHREA 15 ASME unfired
- OSHA
5: How much refrigerant can be stored in a mechanical room outside of the system?
- 200
- 150
- 100
- 330
6: A movie theater would be considered a
- institutional occupancy
- mixed occupancy
- public assembly occupancy
- commercial occupancy
7: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
- Class A machinery room
- Class M machinery room
- Class T machinery room
- Class B machinery room
8: When a refrigerating machinery room is used, the emergency procedures shall be posted
- outside the room, immediately adjacent to each door
- on a conspicuous card located near the evaporator
- inside the room, immediately adjacent to each door
- on a conspicuous card located near the compressor
9: How far from the ground does a relief valve need to be?
- Not more than 3' above grade
- At least 25' above grade
- At least 15' above grade
- At least 20' above grade
10: A relief valve shall be located at least ___ above grade.
- 25'
- 10'
- 15'
- 36'
11: Doors communicating with outside from a mechanical room must be?
- Steel, approved, weather-stripped
- Self-closing, aligned, fire door
- Self-closing, wooden, fire door
- Self-closing, approved, fire door
12: A relief valve discharge capacity is rated in
- Pounds of air per minute.
- temperature minus pounds of air per second divided by release rate squared
- PSIA
- PSIG
13: A pressure vessel having an inside diameter of 6” or less shall be sufficient to withstand ____times the pressure of the saturation temperature of the refrigerant or ____times the critical pressure of the refrigerant, whichever is less.
- 6.6, 6.6
- 2.5, 2.5
- 3.0, 3.5
- 2.5, 3.0
14: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
- 99%
- 90%
- 80%
- 75%
15: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8
- low side of the system
- the liquid side of the system
- high side of the system
- the vapor side of the system
16: Name an HCFC refrigerant(s):
- R-22
- R-123
- R-11
- both a & b
17: Setting a pressure relief device shall not exceed ___ of the design pressure
- 75%
- 80%
- 90%
- 100%
18: What would be the classification for Stop & Shop grocery store?
- Large mercantile
- Industrial
- Place of assembly
- Instituional
19: What type of material can't be used on the outlet of a relief valve?
- Copper
- Magnesium alloy
- PVC
- Stainless steel
20: High pressure controls should be set no higher than
- 80% of set point
- 90% of set point
- 25% of set point
- 10% of set point
21: The Department that certifies the transportation of refrigerant is the
- RSES
- EPO
- EPA
- DOT
22: The gauge thickness required on a CO2 tank construction is
- 1/16"
- 3/32"
- 1/8"
- 5/16"
23: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
- 5.5
- 2.5
- 3.0
- 2.0
24: What pipe can not be used for refrigeration?
- L
- K
- M
- N
25: What must be done to refrigerant pipes before being buried?
- Coated
- Leaked checked
- Encased
- Certified