Topics: ASHRAE/CMR
1: Which occupancy can ammonia be used in?
- depends on the quantity of freon
- commercial
- redifential
- industrial
2: When a receiver is greater than 3 cubic feet but less than 10 cubic feed, what is the minimum relief device required?
- fusible plug
- relief valve
- rupture disc
- all of the above
3: What do you need to do when you install a new system?
- Document the superheat and subcooling reading
- Add refrigerant
- Insulate the suction line before you take a superheat reading
- Have it inspected
4: Where must a refrigeration contractor's license number be displayed?
- Uniforms, checks, and invoices.
- Trucks, license plates, and uniforms
- Trucks, invoices, and advertising
- Truck, office, every job, and on all equipment
5: Where a refrigeration or air conditioning system is installed,
- The company who installed the system must notify the fire department in the jurisdiction where installed
- it shall not be operated below prescribed pressuers
- A field inspection shall be made before it is put into service
- the form or certificate shall be authorized by the Department of Public Safety
6: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False
7: 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 a non-flammable refrigerant
- Because it's cheap
- Because it's water
8: What pipe can not be used for refrigeration?
- L
- K
- N
- M
9: What must be done to refrigerant pipes before being buried ?(8.10.4)
- Classifed
- Leak checked
- Insulated and installed in a pipe duct (Encased)
- Certified
10: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?
- R-12
- R-22
- R-11
- R-113
11: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 22
- 66
- 25
- 50
12: A High-Probablity system
- is such that any leak will cause injury or death to anyone within a 100 square foot area
- is a system highly likely to leak from a failed connection or component of such system
- is such that a leak of refrigerant from failed connections will enter the unoccupied space
- is such that a leak of refrigerant from failed connections will enter the occupied space
13: What would be the classification for Stop & Shop grocery store?
- Place of assembly
- Industrial
- Instituional
- Large mercantile
14: Class 3 refrigerants are
- highly flammable
- toxic
- non-flammable
- non-toxic
15: What is an example of institutional occupancy?
- Dorms
- Hospital
- Football stadium
- Shopping mall
16: Doors communicating with outside from a mechanical room must be?
- Self-closing, approved, fire door
- Self-closing, aligned, fire door
- Steel, approved, weather-stripped
- Self-closing, wooden, fire door
17: How far from the ground does a relief valve need to be?
- Not more than 3' above grade
- At least 15' above grade
- At least 20' above grade
- At least 25' above grade
18: An example of direct system is
- rooftop unit
- chiller
- absorber
- none of the above
19: Liquid level gauges shall have _____________ with one exception being that of the liquid level gauge bull’s eye type.
- color-coded glass to determine type of refrigerant
- moisture indicators
- automatic closing shut-off valves
- All of the above
20: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
- 2.0
- 3.0
- 2.5
- 5.5
21: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
22: Trichlorofluoromethane is the name of what refrigerant?
- R-502
- R-12
- R-113
- R-11
23: Stop valves shall not be permitted between the system and the
- condenser
- relief valve
- bleed valve
- service valve
24: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- you can't change refrigerants
- place sign, check for leaks, insulate
- make sure it's compatible, notify owner, notify A.H.J
- nothing must be done
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