Topics: ASHRAE/CMR
1: A pressure relief should be located at least _______ from windows and doors.
- 25'
- 15'
- 30'
- 20'
2: Insurance companies shall forward each inspection report of all refrigeration or A/C systems to the Chief of Inspections within
- 1 week
- 2 months
- 14 days
- 30 days
3: When should a relief valve start to function?
- Two times it's working pressure
- At it's set pressure
- 10 psi before it's set pressure
- Before the purge station discharges
4: When is the only time you can leave a service container attached to a system?
- Leaking system
- Recovery
- Charging
- Both b and c
5: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
- mercantile occupancy
- business occupancy
- public assembly occupancy.
- commercial occupancy
6: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
7: Stop valves shall not be permitted between the system and the
- bleed valve
- relief valve
- condenser
- service valve
8: 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
- There is a temporary shut-down until a final inspection can be performed.
- Notify the Fire Marshal that the system has been inspected and approved
9: Who is permitted to access a refrigeration machine room?
- Authorized persons only
- Anyone, it's a completely safe area
- Any employee
- Contractors only
10: Each machinery room shall contain
- a refrigerant detector located in an area where the refrigerant from a leak will concentrate
- smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements
- high and low pressure controls
- a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
11: What type refrigerant is NOT ozone depleting?
- HCFC
- HFC
- CFC
- Halon
12: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above
13: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 18
- 22
- 50
- 33
14: 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”
- “UM” and “UV”
- “UV”
- “UL”
15: 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
- competent welder
- welder qualified
- licensed welder
- licensed technician
16: An example of direct system is
- rooftop unit
- chiller
- absorber
- none of the above
17: What type of refrigerants are NOT flammable?
- CHC
- HFC
- HCFC
- All of the above
18: Machinery rooms must be vented to ______?
- unoccupied spaces
- neutralizing tank
- basement
- outdoors
19: 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.
- 250
- 100
- 350
- 400
20: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
21: Single compound Refrigerants are classified by what two criteria?
- Weight and color
- Flammability and toxicity
- Temperature range and hazardousness
- Flammability and temperature range
22: Institutional occupancy is
- a premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space.
- a premise or that portion of a premise from which, because they are disabled, debilitated, or confined, occupants cannot readily leave without the assistance of others.
- a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
- None of the above
23: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- UL and UM
- UV or UR
- UM or UL
- UL and UR
24: What is a Category "D" fluid?
- A typical refrigerant used on newer air conditioning and heat pump ssytems
- A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily contact
- Any fluid that exceeds 150 psig and has design temperature of over 366F
- A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and design temperature is between -20F to 366F
25: Ammonia can come in contact with _______ ?
- Copper tubing
- Copper
- Aluminum
- Brass