Topics: ASHRAE/CMR
1: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False
2: NH3 is
- ammonia
- lithium bromide
- R-718
- R-508A
3: According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into
- the low-pressure side of the system
- the high side of the system
- the liquid receiver
- both a and c are correct
4: Pressure vessels with an internal volume of 10 cubic feet or more
- shall use fusible plugs
- shall use rupture discs or duel pressure relief valves
- shall use pressure relief devices or fusible plugs
- shall use pressure relief devices
5: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 55 lbs
- 660 lbs
- 550 lbs
- 330 lbs.
6: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.
- 36
- 24
- 48
- 18
7: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- UM or UL
- UL and UM
- UV or UR
- UL and UR
8: Setting a pressure relief device shall not exceed ___ of the design pressure
- 90%
- 100%
- 75%
- 80%
9: The color code of a tank of ammonia is
- lavender
- silver
- white
- light green
10: pressure relief valves must discharge to the atmosphere at a location not less than 15 feet from ground level and ____ feet from any window, ventilation opening, or exits of buildings.
- 10
- 20
- 15
- 25
11: Can you use Ammonia in industrial applications?
- Yes, always
- Yes, Under certain condidtions
- No, never
- When mixed with R-718
12: What must be done if refrigeration lines pass through a concrete floor?
- insulated
- installed through a pipe casing
- leak checked
- moisture barrier
13: 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
- low side of the system
- the liquid side of the system
- high side of the system
14: All welding done on any refrigeration system or piping covered by 522 CMR 9.00 shall be performed by a according to Section IX of the ASME code
- licensed technician
- licensed welder
- competent welder
- welder qualified
15: The dial of a pressure gauge, when installed on the high side of a system be graduated 1.2 times the designed pressure.
- True
- False
16: Evaporators within 18" of a heating coil must be equipped with a
- high limit control
- pressure relief device
- low limit control
- zone valve
17: What type of pressure relief device is used on a CO2 system?
- Fusible plug
- Glove valve
- Rupture disk
- Gate valve
18: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- low pressure
- design pressure
- critical pressure
- high pressure
19: Halogen refrigerants are corrosive to which type of metal?
- magnesium
- copper
- black iron
- stainless steel
20: 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
- Notify the Fire Marshal that the system has been inspected and approved
- There is a temporary shut-down until a final inspection can be performed.
21: Class T machine room
- has no flame producing apparatus permanently installed
- shall have remote controls to stop the action of the refrigerant compressor
- shall include closets used for setting equipment
- shall have refrigerant leak detecting systems installed inside and outside the room
22: _____ and its alloys are suitable for use with ammonia systems.
- Copper
- Aluminum
- Zinc
- Magnesium
23: The Department that certifies the transportation of refrigerant is the
- DOT
- EPA
- EPO
- RSES
24: No open flames are allowed in the machinery room unless?
- Approved by the installing contractor
- Never can be allowed
- Only when combustion air is provided from outside of the machinery room
- Approved by the authorized person
25: Relief valves are rated in
- pounds of air per hour
- gallons of water per minute
- gallons of water per hour
- pounds of air per minute