Topics: ASHRAE/CMR
1: What is the minimum size of the discharge pipe?
- Same size as the outlet of the relief valve
- One pipe size larger that the inlet of the relief valve
- Depends on size of manifold
- All of the above
2: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested
- annually
- bi-annually
- regularly
- quarterly
3: Class A refrigerants are considered
- toxic
- flammable
- non-flammable
- non-toxic
4: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.
- True
- False
5: What type of pressure relief device is used on a CO2 system?
- Rupture disk
- Fusible plug
- Gate valve
- Glove valve
6: A professional or office building would be considered what type of occupancy?
- mercantile
- business
- commercial
- public assembly
7: Large Mercantile occupancy is a premise or that portion of a premise where more than ____ persons congregate on levels above or below the street level to purchase personal merchandise.
- 400
- 100
- 250
- 350
8: Large mercantile occupancy is
- a premise of that portion of a premise where more than 50 persons congregate on levels above of below street level to purchase personal merchandise.
- a premise of that portion of a premise where more than 100 persons congregate on levels above of below street level to purchase personal merchandise.
- a premise or that portion of a premise where more than 200 persons congregate on levels above or below street level to purchase personal merchandise
- a premise or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise
9: An example of direct system is
- rooftop unit
- chiller
- absorber
- none of the above
10: 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
11: What is Trichlorotrifluoromethane?
- R-12
- R-113
- R-13
- R-11
12: Who authorizes changes to the safety codes?
- Person who pulled the permit
- Board of Boilers
- Person in charge of the facility
- Contractor who last serviced the system.
13: What must be done if refrigeration lines pass through a concrete floor?
- moisture barrier
- leak checked
- insulated
- installed through a pipe casing
14: When an inspection is needed, how often must it be done?
- every 18 months
- every 36 months
- annually
- every 24 months
15: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
16: Ammonia can come in contact with _______ ?
- Copper
- Aluminum
- Brass
- Copper tubing
17: Most CFC's are
- toxic
- inert
- inert but toxic
- flammable
18: When must refrigeration system covered by the code be inspected?
- Upon installation
- Annually
- Annually and when installed
- Not required
19: What refrigerant doesn't have to be classifted?
- R-717
- R-711
- R-718
- R-134a
20: A Category D fluid
- is when the fluid handled is non flammable, nontoxic, and not damaging to human as defined in ANSI/ASME Process Piping.
- is when the design pressure does not exceed 150 psi
- a fluid for service piping in which the potential for personnel exposure is judged to cause harm and irreversible damage to those persons exposed to it
- Both a and b are correct
21: A pressure relief should be located at least _______ from windows and doors.
- 30'
- 20'
- 15'
- 25'
22: How much clearance do you need around the perimeter of electrical panels?
- 24"
- 18"
- 12"
- 36"
23: The color code of a tank of ammonia is
- lavender
- white
- light green
- silver
24: What pipe can not be used for refrigeration?
- N
- L
- K
- M
25: Pressure vessels with an internal volume of 3 cubic feet or more
- shall use fusible plugs
- shall use pressure relief devices or fusible plugs
- do not need pressure relief protection
- shall use pressure relief devices