Topics: All categories in the pool
1: What is Trichlorotrifluoromethane?
- R-11
- R-13
- R-113
- R-12
2: Three-phase motors have what type of windings?
- three run windings
- three start windings
- one start winding and one run winding.
- three run windings and 3 start windings
3: Capacitors are rated in
- volt - amperes
- kelvins
- micro-farads
- megaohms
4: 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
- Inspector leaves a metal tag with a certification listed on it
- There is a temporary shut-down until a final inspection can be performed.
5: A mercury bulb controller is not recommended for
- use where vibration is severe
- low voltage use
- line or low voltage use
- line voltage use
6: Pressure vessels with an internal volume of 10 cubic feet or more
- shall use fusible plugs
- shall use pressure relief devices or fusible plugs
- shall use rupture discs or duel pressure relief valves
- shall use pressure relief devices
7: R-410A can segregate in the system or chemically change its composition due to a leak.
- True
- False
8: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.
- shall be prohibited
- of Group B2 refrigerant shall be prohibited
- containing R-11, R-123 & R-717 exclusively shall not be prohibited
- shall not be prohibited
9: Volts x amps equals
- Inductance
- Impedance
- Ohms Law
- Watts
10: Suction line oil traps should be installed when the condenser is
- more than 100' away from the evaporator
- in the basement and the evaporator is on the third floor
- on the third floor roof and the evaporator is in the basement
- located outside the operates in temperatures below 35F
11: A single pole-double throw switch used how many wires excluding the ground wire?
- two
- five
- three
- four
12: Who authorizes changes to the safety codes?
- Person in charge of the facility
- Contractor who last serviced the system.
- Person who pulled the permit
- Board of Boilers
13: Ammonia is under what safety classification?
- B2
- B3
- B1
- A3
14: What kind of system uses two different refrigerants in separate systems dependent on each other?
- Low pressure
- Simple
- Cascade
- R-414B
15: Thermodynamics is the branch of science that deals with
- state of energy
- molecular therory
- heat energy
- energy due to motion
16: The solution that leaves the concentrator in an absorption chiller is referred to as the
- weak solution
- absorbed solution
- diluted solution
- strong solution
17: All machine rooms must be outfitted with a detector that _______?
- activates an audible alarm
- activates a visual alarm
- starts the ventilation system
- All of the above
18: Name a CFC refrigerant(s):
- R-11
- R-12
- R-123
- both a & b
19: What is the minimum height refrigeration piping should be placed against walls?
- 7.25'
- Ceiling height
- 72"
- 6'
20: Which of the following is not an air velocity meter?
- Velometer
- Hydrometer
- Anemometer
- Anemotherm
21: A direct system
- is where the refrigerant comes in contact with the space refrigerated
- is on where brine is cooled & circulated to the space refrigerated
- is a self-contained complete factory made and tested system
- is one which encloses a separate body of evaporative refrigerant
22: When an electronic bridge is in balance the bridge output will be
- 15 volts
- 1 volt
- .01 volts
- 0 volts
23: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant
- does not require a pressure-limiting device
- shall be inspected by the Boiler of Inspectors bi-annually
- shall have a pressure limiting device and a pressure relief valve installed
- shall have a pressure limiting device installed on the high side of the system
24: A premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space such as auditoriums, ballrooms, classrooms, passenger depots, restaurants, and theaters is considered a(n)
- institutional occupancy
- commercial occupancy
- public assembly occupancy
- illegal occupancy
25: A 3-cubic foot receiver must have what type of relief valve?
- fusible plug
- relief valve
- rupture device
- none of the above