問題一覧
1
An electrician should not wear shoes that have sponge rubber soles while working mainly because they ___
are easily punctured when steeping on a nail
2
Counter emf is measured in
volts
3
___ cable shall be flame retardant, moisture-resistant, fungus-resistant, and corrosion-resistant
NMC
4
The term “15-ampere” is commonly used in identifying a/an
fuse
5
Which resistor is physically larger in size?
10 ohms, 50W
6
____are typically used as enclosures for splicing or terminating telephone cables. I. splice cases Il. terminal boxes IlI. octagonal boxes
I and II only
7
Fluorescent lighting fixtures may be used as raceways if ___
listed for use as a raceway
8
Reactance will cause the current in a circuit to vary only when ___
AC current flows
9
Locknuts are sometime used in making electrical connections on studs. In these cases fhe purpose of the locknuts is to ___
prevent the connection from loosening under vibration
10
A motor with a wide speed range is a(n) ___
DC motor
11
Identified, as used in the CODE in reference to a conductor or its terminals, means that such a conductor or terminal is to be recognized as ___
Grounded
12
Type ITC cable is permitted to be used in industrial establishments with proper supervision in which of the following? I. aerial cable on a messenger Il. cable trays III. with nonpower-limited circuits
I and II only
13
In areas where walls are frequently washed conduit should be mounted with __ inches of air space between the wall and the conduit
1/4”
14
At what angle does a header attach to a floor duct?
right angle
15
The field winding of a self-excited generator is supplied from
its own generated emf
16
The ___ shall be executive officer of the board (BEE)
President of the Philippines
17
A type of AC motor that runs at a constant speed and is used for such purposes as an electric clock motor is a ___ motor.
synchronous
18
Except where computations result in a major fractions of an amphere __, such fractions may be dropped
0.5 or larger
19
The voltage per turn of the primary of a transformer is __ the voltage per turn of the secondary
the same as
20
Bare conductors on a 30 volt lightning system shall not be installed less than ___ mm above thee finished floor, unledd ghe listed for a lower height
2100
21
How many #12 XHHW conductors can you install in a 3/8” flexible metal conduit with the use of inside fittings?
1
22
A switch or breaker should disconnect the grounded conductors of a circuit __
simultaneously as it disconnects the ungrounded conductors
23
The resistance in a circuit may be increased by ___
loose connection
24
The connection of a ground clamp to a grounding electrode shall be ___
accessible
25
Artificial respiration after a severe electrical shock is necessary when the shock results in ___
stoppage of breathing
26
___ locations are those that are hazardous because of the presence of easily ignitable fibers or flyings
Class III
27
This refers to the choice of electrical systems, including planning and detailing of requirements for protection, control, monitoring, coordination and interlocking of electrical systems among others
electrical system design
28
It ids generally recognized that ___ is the largest size EMT hand bender
1 1/4”
29
An oil switch is a switch having contacts which operate under ___. i.askarel ii.oil iii.other suitable liquids
i, ii, or iii
30
any interruption of the circuit, even circuits as low as ___ volts, either by any switch, or loose or defective connections anywhere in the circuit, may produce a spark sufficient to ignite flammable anesthetic agents.
10
31
In a D.C circuit, the ratio of watts to volt amperes is ___
Unity
32
Exposed non-current carrying metal parts of fixed equipment must be grounded under all of the following conditions except ___
electrically heated devices with the frames insulated ground
33
When installing a type FCC system under carpet squares, not more than ___ crossing of cable runs shall be permitted at any one points
2
34
The definition of accessible (wire)
not permanently closed in by the building or structure
35
A circuit breaker that has purposely introduced into it a delay in the tripping action and which delay decrease as the magnitude of the current increases is a ___ circuit breaker.
inverse time
36
Units of apparent power
volts-ampere
37
The branch circuit overcurrent devices in emergency circuitd shall be ___
accessible to only authorized personel
38
To determine directly whether all finished wire installations possess resistance between conductors , and between conductors and ground, use ___.
a megger
39
Autotransformers used to start large induction motors are frequently called starting ___
compensator
40
The horsepower rating of the disconnecting means of hermetic refrigerant motor-compressors shall be determined from the ___ I. nameplate rated-load current II. branch-circuit selection current III. loads
I or II only
41
A fuse puller is used in replacing
cartridge fuses
42
A transformer would most likely have a ___ efficiency
90%
43
Which of the following is NOT a cause for a generator to vibrate
loose pigtails
44
The minimum wire bending space within the enclosure for motor controllers for a 1/0 conductor (2 wires per terminal) would be __ mm
130
45
The output voltage of a single loop generator is a ___
pulsating ac
46
Flexible cords to portable electricity heated appliances rated at more that ___ watts shall be approved for heating cords
50
47
The length of a type S cord connecting a trash compactor must nit exceed ___
4”
48
The speed of a synchronous motor
it’s constant
49
A substance whose molecules consist of the same kind of atoms is called ___
element
50
The resistance of an electrical conductor is inversely proportional to its ___.
cross sectional area