True/False
Indicate whether the sentence or statement is true
or false.
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1.
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The NEC code
should always be consulted when determining electrical wiring requirements for air conditioning and
refrigeration equipment along with Manufacturer’s requirements.
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2.
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When a marking
specifies fuses or HACR Type circuit breakers, the circuit is intended to be protected only by the
type of protective device specified.
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3.
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Protective device
rating shall not exceed the manufacturer’s values.
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Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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4.
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Disconnecting means shall be located within sight from a readily accessible from the
air-conditioning or refrigeration equipment. The disconnecting means shall be permitted to be
installed on or within the equipment. The disconnecting means shall not be located on ______ that are
designed for access to the equipment.
a. | panels | c. | breakers | b. | doors | d. | stairs | | | | |
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5.
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When installing
cord-connected equipment a separate attachment plug and receptacle shall be permitted to serve as a
_______ means?
a. | breaker | c. | power source | b. | disconnecting | d. | ground
source | | | | |
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6.
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The value of the
branch-circuit selection current will always be equal to or greater than the marked _______ load
current.
a. | running | c. | spike | b. | peak | d. | rated | | | | |
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7.
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When the nameplate
on the unit is missing what would component nameplate must be used to determine the rated-load
current?
a. | condenser fan
motors | c. | electric
heaters | b. | blower | d. | compressor | | | | |
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8.
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When sizing a
disconnecting means for a hermetic refrigeration motor-compressor the ampere rating shall be at least
______% of the nameplate rated-loaded current or branch-circuit protection current, whichever is
greater.
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9.
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The ampere rating
of the disconnecting means shall be at least 115% of the sum of all currents rated at the _____
condition determined in accordance with 440.12.(B)(1) the NEC. a. | rated-loaded | c. | Inrush | b. | FLA | d. | Spike | | | | |
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10.
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Fuse rating
_________ exceed the maximum fuse size specifed on the air conditiong nameplate?
a. | must | c. | cannot | b. | never | d. | will | | | | |
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11.
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A branch-circuit
short-circuit and ground-fault protective device shall be capable of carrying the starting current of
the motor. A protective device have a rating or setting not exceeding ______% of the motor compressor
rated load current or branch-circuit selection current, shall be permitted and may shall not exceed
by ______% if required.
a. | 120%/150% | c. | 175%/350% | b. | 175%/250% | d. | 175%/225% | | | | |
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12.
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Where a flexible
cord is used to supply a room air conditioner, the length of such cord shall not exceed _____ feet
for a nominal 120 volt or _____ feet for a nominal 208/240 rated units.
a. | 10’/6’ | c. | 3’/3’ | b. | 10’/10’ | d. | 10’/2’ | | | | |
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