Topics: ASHRAE/CMR
1: Evaporators within 18" of a heating coil must be equipped with a
- high limit control
- low limit control
- zone valve
- pressure relief device
2: Refrigerant restricted in 2004 but used for transition for decades:
- R-11
- R-123
- R-134A
- R-22
3: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.
- 2.2
- 1
- 1.2
- 1.5
4: What would be the classification of a prison?
- Large mercantile
- Institutional
- Industrial
- Place of assembly
5: A 3-cubic foot receiver must have what type of relief valve?
- fusible plug
- relief valve
- rupture device
- none of the above
6: 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
7: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code
- over pressure protection as well as a temperature protection device
- Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
- over pressure protection
- over pressure protection and a rupture disc
8: What must be done to refrigerant pipes before being buried ?(8.10.4)
- Certified
- Classifed
- Leak checked
- Insulated and installed in a pipe duct (Encased)
9: 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.
- 50
- 350
- 550
- 100
10: Liquid level gauges must be provided with what?
- Automatic shut-offs
- A red line
- A relief valve
- A low level mark
11: What is a Category "M" fluid?
- Any fluid that exceeds 150 psig and has design temperatures over 366F
- A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily content
- A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and the designed temperature is between -20F to 366F
- A typical refrigerant used on newer air conditioning and heat pump systems
12: What is the refrigerant chlorodifluoromethane?
- R-12
- R-22
- R-134a
- R-123
13: R-22 is considered a(n)
- HCFC
- CFC
- HCFCH
- HFC
14: What refrigerant is an inorganic compound?
- Ammonia
- R-132A
- R-22
- R-410A
15: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8
- the vapor side of the system
- the liquid side of the system
- low side of the system
- high side of the system
16: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?
- Foot valve
- Stop valve
- Moisture indicator
- Muffler
17: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above
18: Single compound Refrigerants are classified by what two criteria?
- Temperature range and hazardousness
- Flammability and temperature range
- Flammability and toxicity
- Weight and color
19: Ammonia is under what safety classification?
- B3
- B1
- B2
- A3
20: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 330 lbs.
- 660 lbs
- 55 lbs
- 550 lbs
21: What type of relief valve is used on a CO2 system?
- gate valve
- rupture disc
- fusible plug
- glove disc
22: Where are the three places that the discharge from an ammonia relief valve be piped?
- atmosphere, tank containing water, where the A.H.J. indicates
- underground, into drain, into mechanical room
- to chemical neutralizing tank only
- none of the above
23: What is a Category "D" fluid?
- A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and design temperature is between -20F to 366F
- A typical refrigerant used on newer air conditioning and heat pump ssytems
- Any fluid that exceeds 150 psig and has design temperature of over 366F
- A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily contact
24: No open flames are allowed in the machinery room unless?
- Approved by the authorized person
- Never can be allowed
- Only when combustion air is provided from outside of the machinery room
- Approved by the installing contractor
25: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- UL and UM
- UV or UR
- UL and UR
- UM or UL