Topics: ASHRAE/CMR
1: What type refrigerant is NOT ozone depleting?
- HCFC
- HFC
- CFC
- Halon
2: 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
3: Doors communicating with outside from a mechanical room must be?
- Self-closing, aligned, fire door
- Steel, approved, weather-stripped
- Self-closing, approved, fire door
- Self-closing, wooden, fire door
4: 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
5: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?
- R-718 is not rated unlimited because it's a dangerous refrigerant
- Because it's water
- Because it's cheap
- Because it's a non-flammable refrigerant
6: Class A refrigerants are considered
- flammable
- non-flammable
- non-toxic
- toxic
7: Refrigerants shall be classified by
- toxicity and flammability
- maximum permissible quantities of each group
- color codes
- requirements for commercial, industrial, and residential occupancies
8: What is not a requirement of a Class T machine room?
- Self-closing doors
- Fire hose connected to the building fire protection system.
- Automatic ventilation
- Tight fitting doors
9: Relief valves are rated in
- gallons of water per minute
- gallons of water per hour
- pounds of air per hour
- pounds of air per minute
10: A High-Probability System
- is such that any leak will cause injury or death to anyone within a 100 square foot area
- is such that a leak of refrigerant from a failed connection will enter an unoccupied space
- is such that a leak of refrigerant from a failed connection will enter the occupied space
- is a system highly likely to leak form a failed connection or component of such system
11: Refrigerant piping crossing an open space that affords passageway in any building shall not be less than _____ feet above the floor unless piping is located against the ceiling.
- 9.00'
- 7.25'
- 8'4"
- 7.00'
12: R-22 is classified as a ____ refrigerant on the safety matrix.
- A-1
- A-2
- B-2
- B-1
13: Ammonia can come in contact with _______ ?
- Brass
- Copper tubing
- Aluminum
- Copper
14: Which occupancy can ammonia be used in?
- commercial
- industrial
- depends on the quantity of freon
- redifential
15: The 522 CMR 9.00 has adopted for reference ASHRAE ____
- 10
- III
- 25
- 15
16: A class A3 refrigerant is considered
- toxic and somewhat flammable
- non-toxic and non-flammable
- toxic and non-flammable
- non-toxic but highly flammable
17: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 330 lbs
- 55 lbs
- 660 lbs
- 500 lbs
18: NH3 is
- lithium bromide
- ammonia
- R-508A
- R-718
19: What is Trichlorotrifluoromethane?
- R-113
- R-12
- R-13
- R-11
20: 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.
21: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 50
- 22
- 25
- 66
22: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
23: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and
- gas masks must be worn
- the owner shall be informed
- explosion precautions must be taken
- no flames shall be permitted
24: When must refrigeration system covered by the code be inspected?
- Annually
- Upon installation
- Annually and when installed
- Not required
25: A “U” or “UM” marking a on a nameplate of a pressure vessels signifies compliance with Section VIII of
- the ASME Boiler and Pressure Vessel Code
- Section 11.3.1.5 ASHRAE 15 Standard
- the ANSI Standard 10.7.2
- both the ANSI Standard 10.7.2 and ASHRAE 15 Standard 11.3.1.5