Topics: All categories in the pool
1: Pressure limiting devices are not required for systems containing less then ________ refrigerants.
- 44 lbs
- 13.9 lbs
- 22 lbs
- 6.6 lbs
2: What type of voltage causes the winding in a potential relay to open?
- BEMF (Back Electro-Motive Force)
- 24V control voltage from the thermostat
- 120V line voltage
- None of the above
3: Three-phase motors have what type of windings?
- three start windings
- three run windings
- three run windings and 3 start windings
- one start winding and one run winding.
4: A restaurant is classified as a
- mixed occupancy
- commercial occupancy
- public assembly occupancy
- large mercantile occupancy
5: 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
6: What is potential measured in?
- Amps
- Volts
- Ohms
- Henrys
7: The best way to determine the voltage requirement for an electrical component is to
- determine the capacity of the service panel
- check with the utility company
- read the nameplate data
- read the voltage with a mulitmeter
8: Defined process piping by code CMR (528)
- Any piping that conveys a solid, liquid or gas that is not part of the plumbing or fire protection system
- Any piping in an industrial space
- Any piping in an industrial or commercial space
- All of the above
9: 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
10: 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)
- commercial occupancy
- public assembly occupancy
- illegal occupancy
- institutional occupancy
11: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?
- Foot valve
- Muffler
- Moisture indicator
- Stop valve
12: A Lithium-bromide system is an absorption system that
- uses salts as an absorbent and lithium bromide as a refrigerant
- uses ammonia as a refrigerant and lithium bromide as an absorbent
- uses water as a refrigerant and lithium bromide as an absorbent
- uses water as a absorbent and lithium bromide as a refrigerant
13: The outer portion of shell of the compressor used on low-pressure chillers is called the
- volute
- suction
- nozzle
- baffle
14: The measurement of heat in a particular substance is
- latent heat
- enthalpy
- sensible heat
- specific heat
15: Gauge pressure is
- Atmospheric pressure
- Absolute pressrue
- Barometric pressure
- Force of pressure above that of atmosphere
16: R-22 is classified as a ____ refrigerant on the safety matrix.
- B-2
- A-1
- A-2
- B-1
17: Which occupancy can ammonia be used in?
- commercial
- industrial
- depends on the quantity of freon
- redifential
18: In a refrigeration system, you open a valve from the condenser and collect some material on a clean white sheet of bond paper, which of the following would you most likely be testing for?
- checking the level of refrigerant in the system
- testing for oil in the system
- testing for moisture in the system
- none of the above
19: The certificate of inspection
- shall be authorized by a notarized insurance company
- shall be $20 and an additional fee of $1 for each tone above 20 tons
- shall be posted and protected from dirt, water, and other elements
- shall be posted on the compressor shell or electrical panel at the unit
20: Pressure vessels with an internal volume of 10 cubic feet or more
- shall use pressure relief devices or fusible plugs
- shall use rupture discs or duel pressure relief valves
- shall use fusible plugs
- shall use pressure relief devices
21: 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
22: The maximum permissible amperage draw for a 40VA transfomer with a secondary voltage of 24V is
- 1.7
- .8
- .1
- 1.2
23: The oil separator is always inserted in the system
- in the discharge line
- where it can be easily serviced
- in a cool spot
- to prevent oil logging
24: one BTU equals
- 3.41 hp
- Pi
- 12,000 hp
- 31.4 hp
25: A High-Probability System
- 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
- is such that any leak will cause injury or death to anyone within a 100 square foot area