Topics: ASHRAE/CMR
1: When should a relief valve start to function?
- At it's set pressure
- 10 psi before it's set pressure
- Two times it's working pressure
- Before the purge station discharges
2: What would be the classification of a prison?
- Institutional
- Industrial
- Large mercantile
- Place of assembly
3: Ammonia can come in contact with _______ ?
- Brass
- Copper tubing
- Copper
- Aluminum
4: How many gallons of water per pound of ammonia do you need?
- 15
- 20
- 1
- 5
5: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8
- high side of the system
- low side of the system
- the vapor side of the system
- the liquid side of the system
6: What is a Category "M" fluid?
- A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily content
- Any fluid that exceeds 150 psig and has design temperatures over 366F
- 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
7: A relief valve shall be located at least ___ above grade.
- 10'
- 15'
- 36'
- 25'
8: Name an HCFC refrigerant(s):
- R-22
- R-123
- R-11
- both a & b
9: Setting a pressure relief device shall not exceed ___ of the design pressure
- 100%
- 80%
- 75%
- 90%
10: How many CFMs are required per square foot of commercial office occupied space
- 15 CFM
- .5 CFM
- 20 CFM
- 5 CFM
11: How much clearance do you need around the perimeter of electrical panels?
- 36"
- 24"
- 18"
- 12"
12: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- UV or UR
- UL and UM
- UM or UL
- UL and UR
13: What type of copper is not permitted on refrigeration systems?
- Type M
- Type K
- Type N
- Type L
14: An example of direct system is
- rooftop unit
- chiller
- absorber
- none of the above
15: The main cause of enacting the "no vending rule" of July 1st 1992 was
- global warming potential
- ozone depletion
- both a & b
- None of the above
16: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?
- Foot valve
- Stop valve
- Muffler
- Moisture indicator
17: Pressure vessels with an internal volume of 10 cubic feet or more
- shall use pressure relief devices or fusible plugs
- shall use rupture discs or duel pressure relief valves
- shall use fusible plugs
- shall use pressure relief devices
18: What is the refrigerant dichlorodifluoromethane?
- R-134A
- R-12
- R-123
- R-22
19: Ammonia is under what safety classification?
- B2
- A3
- B3
- B1
20: Who authorizes changes to the safety codes?
- Person in charge of the facility
- Person who pulled the permit
- Board of Boilers
- Contractor who last serviced the system.
21: All electrical work done on refrigeration systems must comply with
- NEC and Massachusetts Modifications
- ASHREA-15 Section 9.2.1
- Department of Energy
- OSHA
22: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.
- shall not be prohibited
- of Group B2 refrigerant shall be prohibited
- shall be prohibited
- containing R-11, R-123 & R-717 exclusively shall not be prohibited
23: 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
24: R-22 falls under which safety classification?
- B-2
- A-2
- A-1
- B-1
25: The gauge thickness required on a CO2 tank construction is
- 5/16"
- 1/8"
- 1/16"
- 3/32"