問題一覧
1
The definition of a qualified person is ___.
persons familiar with the construction and operation of the equipment and the hazards
2
Which of the following is NOT a cause for a generator to vibrate
loose pigtails
3
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
4
When calculating the conductor fill for strut-type channel raceway with internal joiners the raceway shall be permitted to be filled to ___ percent of the cross-sectional area
25
5
An oil switch is a switch having contacts which operate under ___. i.askarel ii.oil iii.other suitable liquids
i, ii, or iii
6
On s delta connected 3Ø, 4-wire system the phase arrangement for the busbar with the highest voltage to ground is ____ .
B phase
7
The wheatstone bridge method is used for accurste measurements of ___
resistance
8
A transformer would most likely have a ___ efficiency
90%
9
An electrician should not wear shoes that have sponge rubber soles while working mainly because they ___
are easily punctured when steeping on a nail
10
Branch circuits for heating and air conditioning equipment located on the elevator car shall not have a circuit voltage in excess of __ volts.
600
11
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
12
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
13
To determine directly whether all finished wire installations possess resistance between conductors , and between conductors and ground, use ___.
a megger
14
When thermal overload relays are used for the protection of poly-phase induction motors, their primary purpose is to protect the motors in case of ___.
sustained overload
15
The voltage produced by electromagnetic induction is controlled by ____.
the number of lines of flux cut per second
16
The important function of a type S-fuse is ___
Non-interchangeable
17
Sensitivity of the voltmeter is expressed in
ohm/volt
18
The speed of a synchronous motor
it’s constant
19
PEE, REE and RME whose Certificate of Registration has been revoked may, after the lapsed of from the surrender thereof, be re-issued upon approval of the Commission.
1 year
20
The rating of a storage battery is expressed in __
ampere-hours
21
The field winding of a self-excited generator is supplied from
its own generated emf
22
Units of apparent power
volts-ampere
23
Boxes and fittings shl be ___ in a class III, Division * location
dusttight
24
A substance whose molecules consist of the same kind of atoms is called ___
element
25
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
26
A nameplate data that will tell whether or not the motor is allowed to develop more that its rated nameplate horsepower without causing deterioration of its insulation.
service factor
27
An appliance, which is fastened or otherwise, secured at a specific location
Fixed
28
An auxiliary gutter shall not extend a greater distance than ___ feet beyond the equipment which it supplements
30
29
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
30
Which one refers to the generator’s mechanical driver?
prime mover
31
The definition of accessible (wire)
not permanently closed in by the building or structure
32
The branch circuit overcurrent devices in emergency circuitd shall be ___
accessible to only authorized personel
33
Artificial respiration after a severe electrical shock is necessary when the shock results in ___
stoppage of breathing
34
Reactance will cause the current in a circuit to vary only when ___
AC current flows
35
The term “15-ampere” is commonly used in identifying a/an
fuse
36
The advantage of AC over DC incudes which of the following?
ease of voltage variation
37
A fuse puller is used in replacing
cartridge fuses
38
The resistance of an electrical conductor is inversely proportional to its ___.
cross sectional area
39
Which of the following motors does not have a commutator
squirrel cage
40
A manufactured assembly designed to support and energize lighting fixtures that are capable of being readily repositioned is ___
lighting track
41
Fire protective signaling circuits shall be grounded the only exception is Dc power-limited circuits having a maximum current of __ amperes
0.030
42
A cord connector that is supported by a permanently installed cord pendant shall be considered a (an) ____
receptacle outlet
43
Flexible cords to portable electricity heated appliances rated at more that ___ watts shall be approved for heating cords
50
44
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
45
Except where computations result in a major fractions of an amphere __, such fractions may be dropped
0.5 or larger
46
Hoist way is a ___ in which an elevator or dumbwaiter is designed to operate
hatchway
47
Autotransformers used to start large induction motors are frequently called starting ___
compensator
48
What would be the advantage of 240 volts rather than 120 volts on a load with the same wattage?
less voltage drop
49
A motor with a wide speed range is a(n) ___
DC motor
50
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
51
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
52
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
53
It ids generally recognized that ___ is the largest size EMT hand bender
1 1/4”
54
A piece of electrical equipment that is designed to operate at alternate intervals of (1) load and no load; or (2) load and rest; or (3) load, no load, and rest is called __ duty.
intermittent
55
This refers to department stores, supermarkets, shopping malls, office buildings, hotels, theatres, stadiums, condominiums, conventions, convention centers, restaurants and the like, used for business or profit
commercial establishments
56
A switch or breaker should disconnect the grounded conductors of a circuit __
simultaneously as it disconnects the ungrounded conductors
57
Typical output of a lead acid cell.
2.0 V
58
The connection of a ground clamp to a grounding electrode shall be ___
accessible
59
Counter emf is measured in
volts
60
__ are permitted to protect motor branch circuit conductors from overload. I. Thermal relays II. Inverse time circuit breakers III. Time delay fuses
I, II, III
61
For open conductors of not over 600 volts, clearance from ground shall be __ mm, above finished grade where the supply conductors have a nominal voltage limited to 150 volts to ground and accessible to pedestrians only.
3000
62
A switch or circuit breaker should disconnect the grounded conductors of a circuit ___
simultaneously as it disconnects the ungrounded conductors
63
What is the VA input of a fully loaded 5hp 230 volt single-phase motor?
6440
64
When using compressed air to clean electrical equipment, the air pressure should not exceed 50 pounds. The main reason is higher pressures ___.
may loosen insulating tape
65
All lights and any receptacles adjacent to the mirror(s) and above the dressing table counters in dressing rooms of theaters shall be controlled by wall switches installed in the
dressing rooms
66
all wiring must be installed so that when completed
it is free of short and unintentional grounds
67
The wattmeter/s necessary to measure the power in the load of an unbalanced 3-phase, 4-wire system is __
3
68
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
69
In a D.C circuit, the ratio of watts to volt amperes is ___
Unity
70
___ cable shall be flame retardant, moisture-resistant, fungus-resistant, and corrosion-resistant
NMC
71
The load in an electrical circuit is use to ___
utilize the electrical energy
72
Fluorescent lighting fixtures may be used as raceways if ___
listed for use as a raceway
73
An appliance that is not easily moved from one place to another in normal use is a _ appliance
stationary
74
A common fuse and circuit breaker works on the principal that ___
current develops heat
75
The length of a type S cord connecting a trash compactor must nit exceed ___
4”
76
When installing a type FCC system under carpet squares, not more than ___ crossing of cable runs shall be permitted at any one points
2
77
The input to a motor is 16,000 watts and the motor loses a total of 3,000 watts. The efficiency of the motor is most nearly
81.25%
78
____are typically used as enclosures for splicing or terminating telephone cables. I. splice cases Il. terminal boxes IlI. octagonal boxes
I and II only
79
The output voltage of a single loop generator is a ___
pulsating ac
80
The process of adding impurities to a pure semiconductor
Doping
81
In areas where walls are frequently washed conduit should be mounted with __ inches of air space between the wall and the conduit
1/4”
82
___ locations are those that are hazardous because of the presence of easily ignitable fibers or flyings
Class III
83
Which of the following is standard size fuse?
601
84
An electrical time switch for lighting is normally connected in ___ with the lighting circuit being controlled
series
85
The definition of ambient temperature is ____
The temperature of the area surrounding the conductor
86
The resistance in a circuit may be increased by ___
loose connection
87
The maximum current a #12 THW copper conductor connected to a 20 amp circuit breaker would ever carry under any condition could be ___ amperes.
5000 or more
88
How many #12 XHHW conductors can you install in a 3/8” flexible metal conduit with the use of inside fittings?
1
89
At what angle does a header attach to a floor duct?
right angle
90
When more than one calculated or tabulated ampacity could apply for a given circuit length, the __ value shall be used.
lowest
91
an electrical timer switch for lighting is normally connected in ___ with the lighting circuit being controlled
Series
92
The voltage per turn of the primary of a transformer is __ the voltage per turn of the secondary
the same as
93
The temperature of the shunt field motor increases from 20°C to 30°C after 3 hours of operation. This increase in temperature produces what effect on the behavior of the motor?
It will speed up the motor due to decrease in the field current
94
Automatic device that operates at present values is known as ___.
relay
95
The minimum wire bending space within the enclosure for motor controllers for a 1/0 conductor (2 wires per terminal) would be __ mm
130
96
Bussways rated over 600 volts shall have all conductor termination and connection hardware accessible for __. I. Maintenance II. Connection III. Installation
I, II, & III
97
Conductors which supply one or more AC transformers or DC rectifiers are welders shall be protected by an overcurrent decide rate or set at not more than ___ percent of the conductor rating
200
98
Which resistor is physically larger in size?
10 ohms, 50W
99
An open coil can be detected by ___ reading
high resistance
100
The ___ shall be executive officer of the board (BEE)
President of the Philippines