Topics: ASHRAE/CMR
1: When an inspection is needed, how often must it be done?
- every 36 months
- every 18 months
- every 24 months
- annually
2: All electrical work done on refrigeration systems must comply with
- NEC and Massachusetts Modifications
- OSHA
- ASHREA-15 Section 9.2.1
- Department of Energy
3: Where are the three places that the discharge from an ammonia relief valve be piped?
- To chemical neutralizing tank only
- Underground, into drain, into mechanical room
- Atmosphere, Tank containing water, where the AHJ indicates.
- None of the above.
4: R-22 is considered a(n)
- HCFCH
- HCFC
- CFC
- HFC
5: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code
- over pressure protection and a rupture disc
- Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
- over pressure protection as well as a temperature protection device
- over pressure protection
6: Setting a pressure relief device shall not exceed ___ of the design pressure
- 75%
- 90%
- 100%
- 80%
7: _____ and its alloys are suitable for use with ammonia systems.
- Copper
- Zinc
- Magnesium
- Aluminum
8: Halogen refrigerants are corrosive to which type of metal?
- magnesium
- stainless steel
- copper
- black iron
9: A relief valve shall be located at least ___ above grade.
- 15'
- 10'
- 25'
- 36'
10: 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
11: NH3 is
- R-718
- R-508A
- ammonia
- lithium bromide
12: 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
13: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?
- 1,000
- 100
- 100,000
- 10,000
14: R-717 is
- trichloromethane
- ammonia
- water
- carbon dioxide
15: High pressure controls should be set no higher than
- 90% of set point
- 10% of set point
- 80% of set point
- 25% of set point
16: Name an HCFC refrigerant(s):
- R-22
- R-123
- R-11
- both a & b
17: What type of material can't be used on the outlet of a relief valve?
- Magnesium alloy
- PVC
- Stainless steel
- Copper
18: What happens after your initial inspection of a pressure vessel?
- Inspector leaves a metal tag with a certification listed on it
- Notify the AHJ to let them know that the system been inspected
- There is a temporary shut-down until a final inspection can be performed.
- Notify the Fire Marshal that the system has been inspected and approved
19: Class 3 refrigerants are
- non-flammable
- non-toxic
- highly flammable
- toxic
20: A declaration test is needed when the system contains more than
- 110 lbs
- 55 lbs
- 65 lbs
- 120 lbs
21: How far from the ground does a relief valve need to be?
- At least 25' above grade
- Not more than 3' above grade
- At least 20' above grade
- At least 15' above grade
22: Each machinery room shall contain
- smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements
- a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
- high and low pressure controls
- a refrigerant detector located in an area where the refrigerant from a leak will concentrate
23: The discharge relief valve is located (9.4.6)
- between the compressor and the stop valve
- between the compressor and oil separator
- between the compressor and reciever
- on top of the condensor
24: What pipe can not be used for refrigeration?
- L
- K
- N
- M
25: Ammonia is under what safety classification?
- A3
- B2
- B3
- B1