Topics: ASHRAE/CMR
1: What section governs pressure vessels?
- OSHA
- Section 1 ASHREA 15 ASME fired
- Section ASHREA 34
- Section 8 ASHREA 15 ASME unfired
2: What type refrigerant is NOT ozone depleting?
- CFC
- HCFC
- HFC
- Halon
3: Trichlorofluoromethane is the name of what refrigerant?
- R-12
- R-113
- R-11
- R-502
4: Class A refrigerants are considered
- flammable
- non-toxic
- non-flammable
- toxic
5: Pressure vessel having an inside diameter exceeding 6” with an internal pressure greater than 15psig shall be marked directly on or on the nameplate the letters _______________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- “UM” and “UV”
- “UV”
- “UL”
- “U” or “UM”
6: The color code of a tank of ammonia is
- silver
- light green
- white
- lavender
7: All electrical work done on refrigeration systems must comply with
- NEC and Massachusetts Modifications
- OSHA
- ASHREA-15 Section 9.2.1
- Department of Energy
8: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- nothing must be done
- you can't change refrigerants
- make sure it's compatible, notify owner, notify A.H.J
- place sign, check for leaks, insulate
9: When should a relief valve start to function?
- 10 psi before it's set pressure
- Two times it's working pressure
- At it's set pressure
- Before the purge station discharges
10: Pressure vessels with an internal volume of 3 cubic feet or more
- shall use pressure relief devices or fusible plugs
- shall use fusible plugs
- do not need pressure relief protection
- shall use pressure relief devices
11: Where a refrigeration or air conditioning system is installed,
- The company who installed the system must notify the fire department in the jurisdiction where installed
- A field inspection shall be made before it is put into service
- it shall not be operated below prescribed pressuers
- the form or certificate shall be authorized by the Department of Public Safety
12: R-717 is
- water
- carbon dioxide
- trichloromethane
- ammonia
13: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- design pressure
- critical pressure
- high pressure
- low pressure
14: Class 3 refrigerants are
- non-toxic
- highly flammable
- non-flammable
- toxic
15: 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
- 500 lbs
- 55 lbs
16: Refrigerants shall be classified by
- toxicity and flammability
- maximum permissible quantities of each group
- color codes
- requirements for commercial, industrial, and residential occupancies
17: Emergency shutdown procedures, including precautions to be observed in case of a breakdown or leak over 55 lbs of refrigerant charge, shall be displayed on a conspicuous card located as near as possible to the
- evaporator
- compressor
- boiler
- outside the machinery room
18: Ammonia is under what safety classification?
- A3
- B3
- B2
- B1
19: 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.
20: Who approves containers for refrigerants?
- D.O.D
- D.O.E
- E.P.A
- D.O.T
21: Pipe identification labels are required when the system contains more than
- 120 lbs
- 55 lbs
- 65 lbs
- 110 lbs
22: What is not a requirement of a Class T machine room?
- Self-closing doors
- Fire hose connected to the building fire protection system.
- Tight fitting doors
- Automatic ventilation
23: No open flames are allowed in the machinery room unless?
- Never can be allowed
- Approved by the installing contractor
- Only when combustion air is provided from outside of the machinery room
- Approved by the authorized person
24: What must be done to all doors and access points in duct work going through a mechanical room?
- Must be hindged
- Must be screwed shut
- Must be sealed and gasketed
- All of the above
25: High pressure controls should be set no higher than
- 80% of set point
- 25% of set point
- 90% of set point
- 10% of set point