Topics: ASHRAE/CMR
1: How many CFMs are required per square foot of commercial office occupied space
- 5 CFM
- 20 CFM
- 15 CFM
- .5 CFM
2: What kind of material can't be used on the outlet of a relief valve?
- Stainless Steel
- Aluminum
- PVC
- Copper
3: Relief valves are rated in
- pounds of air per hour
- gallons of water per hour
- pounds of air per minute
- gallons of water per minute
4: 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
5: How far from the window does a relief valve need to be according to ASHRAE-15?
- There is no minimum for relief valve and windows.
- At least 40'
- At least 30'
- At least 20'
6: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.
- 1.5
- 1
- 2.2
- 1.2
7: Which of the following are considered inorganic refrigerants?
- R-717 and R-718
- 410A and R-407C
- R-500 and R-502
- None of the above
8: A “U” or “UM” marking a on a nameplate of a pressure vessels signifies compliance with Section VIII of
- the ASME Boiler and Pressure Vessel Code
- Section 11.3.1.5 ASHRAE 15 Standard
- the ANSI Standard 10.7.2
- both the ANSI Standard 10.7.2 and ASHRAE 15 Standard 11.3.1.5
9: What type of relief valve is used on a CO2 system?
- gate valve
- glove disc
- fusible plug
- rupture disc
10: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 660 lbs
- 330 lbs.
- 550 lbs
- 55 lbs
11: _____ and its alloys are suitable for use with ammonia systems.
- Copper
- Aluminum
- Zinc
- Magnesium
12: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.
- True
- False
13: Single compound Refrigerants are classified by what two criteria?
- Flammability and temperature range
- Weight and color
- Flammability and toxicity
- Temperature range and hazardousness
14: Doors communicating with outside from a mechanical room must be?
- Self-closing, approved, fire door
- Steel, approved, weather-stripped
- Self-closing, wooden, fire door
- Self-closing, aligned, fire door
15: What type of copper is not permitted on refrigeration systems?
- Type K
- Type M
- Type L
- Type N
16: How many flammability classifications are refrigerants in?
- 2
- 5
- 3
- 7
17: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False
18: R-11 belongs to Group
- B-3
- A-1
- B-1
- A-2
19: What is Trichlorotrifluoromethane?
- R-11
- R-13
- R-113
- R-12
20: Systems containing more than 110 pounds must have stop valves located at the
- compressor suction inlet
- compressor discharge outlet
- receiver inlet and outlet
- All of the above
21: A class A3 refrigerant is considered
- non-toxic but highly flammable
- non-toxic and non-flammable
- toxic and non-flammable
- toxic and somewhat flammable
22: Halogenated refrigerants cannot be used with what material?
- Aluminum
- Stainless steel
- Magnesium alloy
- Copper
23: Liquid level gauges must be provided with what?
- A relief valve
- A low level mark
- A red line
- Automatic shut-offs
24: Refrigerant restricted in 2004 but used for transition for decades:
- R-123
- R-22
- R-11
- R-134A
25: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8
- the liquid side of the system
- the vapor side of the system
- low side of the system
- high side of the system