Topics: ASHRAE/CMR
1: Which occupancy can ammonia be used in?
- industrial
- commercial
- redifential
- depends on the quantity of freon
2: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?
- A group sensing
- refrigerant sensing
- CO Sensing
- phosgene gas sening
3: Name a CFC refrigerant(s):
- R-11
- R-12
- R-123
- both a & b
4: What type of relief valve is used on a CO2 system?
- rupture disc
- fusible plug
- gate valve
- glove disc
5: A class B2 refrigerant is considered
- toxic and somewhat flammable
- non-toxic and non-flammable
- toxic and non-flammable
- non-toxic and highly flammable
6: Who approves containers for refrigerants?
- E.P.A
- D.O.D
- D.O.E
- D.O.T
7: Joints in refrigeration piping must be _____ before being covered?
- Leak tested
- Pressurized
- Insulated
- Inspected
8: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested
- regularly
- annually
- bi-annually
- quarterly
9: The color code of a tank of ammonia is
- silver
- white
- light green
- lavender
10: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above
11: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.
- 18
- 48
- 24
- 36
12: R-22 falls under which safety classification?
- B-1
- B-2
- A-2
- A-1
13: What happens after your initial inspection of a pressure vessel?
- Notify the Fire Marshal that the system has been inspected and approved
- 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.
- Inspector leaves a metal tag with a certification listed on it
14: All serviceable components of a refrigeration system shall be provided with
- safe access
- name plates with markings referring to pressure and temperature in accordance with ASME Boiler and Pressure Vessel Code
- service manuals
- manufactures instructions on start-up procedures
15: Stop valves shall not be permitted between the system and the
- relief valve
- service valve
- condenser
- bleed valve
16: 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
17: Halogen refrigerants are corrosive to which type of metal?
- copper
- stainless steel
- magnesium
- black iron
18: 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
- 25
- 15
19: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 500 lbs
- 55 lbs
- 330 lbs
- 660 lbs
20: 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
21: R-717 is
- water
- carbon dioxide
- ammonia
- trichloromethane
22: There can be no airflow from an occupied space through a machine room unless what?
- System is high velocity
- System is ducted and sealed
- Duct is not located in the ceiling
- None of the above.
23: The 522 CMR 9.00 has adopted for reference ASHRAE ____
- III
- 25
- 15
- 10
24: All electrical work done on refrigeration systems must comply with
- OSHA
- NEC and Massachusetts Modifications
- ASHREA-15 Section 9.2.1
- Department of Energy
25: 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