Topics: ASHRAE/CMR
1: What type of pressure relief device is used on a CO2 system?
- Gate valve
- Fusible plug
- Rupture disk
- Glove valve
2: A movie theater would be considered a
- mixed occupancy
- commercial occupancy
- institutional occupancy
- public assembly occupancy
3: Refrigeration piping before being buried shall be
- leak tested
- encased in pipe duct
- pressure tested
- All of the above
4: 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.
- “U” or “UM”
- “UL”
- “UV”
- “UM” and “UV”
5: What is the refrigerant dichlorodifluoromethane?
- R-134A
- R-22
- R-123
- R-12
6: The main purpose of a refrigerant detector in a machinery room is to
- inform there is a refrigerant leak int he system
- detect toxins in the air caused by a refrigerant leak
- to set off an alarm when there is refrigerant present inside the room
- all of the above
7: 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
8: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- high pressure
- design pressure
- low pressure
- critical pressure
9: Doors communicating with outside from a mechanical room must be?
- Self-closing, aligned, fire door
- Self-closing, approved, fire door
- Self-closing, wooden, fire door
- Steel, approved, weather-stripped
10: 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
11: How far from the ground does a relief valve need to be?
- At least 20' above grade
- Not more than 3' above grade
- At least 15' above grade
- At least 25' above grade
12: Pressure vessels having an inside diameter of 6” or less shall be protected by
- a fusible plug
- Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
- either a fusible plug or a pressure relief device
- a pressure relief device
13: Ammonia belongs to Group
- A-1
- B-1
- A-2
- B-2
14: What would be the classification of a prison?
- Industrial
- Large mercantile
- Place of assembly
- Institutional
15: Stop valves shall not be permitted between the system and the
- bleed valve
- condenser
- service valve
- relief valve
16: When an inspection is needed, how often must it be done?
- every 24 months
- annually
- every 18 months
- every 36 months
17: How many groups of refrigerants are there?
- 7
- 5
- 1
- 3
18: All electrical work done on refrigeration systems must comply with
- OSHA
- ASHREA-15 Section 9.2.1
- NEC and Massachusetts Modifications
- Department of Energy
19: It shall be the duty of the person in charge of the premises on which a refrigeration system containing more than ___ lbs of refrigerant is installed to provide a schematic drawing or panel giving directions for the operation of the system.
- 55
- 50
- 15
- 75
20: Whoever owns/uses a refrigeration or air conditioning system covered by this code
- must notify the Department of Public Safety prior to starting the system
- shall be licensed by the Commonwealth of Massachusetts according to CMR 522
- shall make application for inspections to the Chief of Inspectors
- None of the above
21: 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
22: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.
- the atmosphere
- a de-pressurized recovery tank with a silver top and yellow bottom
- a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
- All of the above
23: A machine room with a refrigerant system using ammonia shall
- be provided with a continuously operated ventilation system
- be considered a non-hazardous location in accordance with National Electrical code
- have no flame producing apparatus permanently installed and operated
- All of the above
24: Which of the following is an inorganic refrigerant?
- R-22
- Ammonia
- Chlorofluorocarbons
- All of the above
25: Ammonia can come in contact with _______ ?
- Copper tubing
- Brass
- Aluminum
- Copper