1. For service entrance conductors, the minimum size of copper wires the code allows is

_______.

a. 3.5 mm2 b. 5.5 mm2 c. 8.0 mm2 d. 14 mm2

2. The maximum number of disconnects the code allows per service grouped in any one

location is _____.

a. 4 b. 6 c. 8 d. 10

3. In general, switches shall be so wired that all switching is done in the ________ conductor.

a. grounded b. ungrounded c. both a and b d. neither a nor b

4. When circuit breaker are installed in enclosed switchboards, they are usually derated to a

certain percentage. What is this percentage?

a. 60% b. 80% c. 50% d. 70%

5. Which of the following requires a moisture seal at all points of termination?

a. underplaster extensions b. bare conductor feeders

c. liquidtight flexible metal conduit d. mineral-insulated cable

6. For a feeder supplying household cooking equipment and electric clothes dryers the

maximum unbalanced load on the neutral conductor shall be considered as ______ of the

load on the ungrounded conductors.

a. 40% b. 50% c. 70% d. 80%

7. A _______ is a protective device for limiting surge voltages by discharging or bypassing

surge current, and it also prevents continued flow of follow current while remaining capable of

repeating these functions.

a. surge arrester b. auto fuse c. fuse d. circuit breaker

8. No swimming pool lighting fixtures shall be installed for operation on supply circuits over

_______ volts between conductors.

a. 24 b. 50 c. 120 d. 150

9. Service conductors between the street main and the first point of connection to the service

entrance run underground is known as the service ________.

a. drop b. loop c. lateral d. cable

10. EMT installed in a wet location, shall have it s coupling and connectors ________.

a. protected against corrosion b. corrosion resistant

c. raintight type d. none of these

11. Dual-voltage motors that have a different locked-rotor kva per horsepower on the two

voltages shall be marked with the code letter for the voltage giving the ______ locked-rotor

kva per horsepower.

a. highest b. average c. lowest d. normal

12. Conductor A.W.G. numbers vary _______ to the ampacity.

a. inversely b. proportionally c. directly d. bi-laterally

13. Type TC power and control cable may be used _________.

a. in outdoor locations when supported by a messenger cable

b. as open cable on brackets

c. where exposed by physical damage

d. none of these

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For service entrance conductors, the minimum size of copper wires the code allows is _______. a. 3.5 mm 2 b. 5.5 mm 2 c. 8.0 mm 2 d. 14 mm 2
The maximum number of disconnects the code allows per service grouped in any one location is _____. a. 4 b. 6 c. 8 d. 10
In general, switches shall be so wired that all switching is done in the ________ conductor. a. grounded b. ungrounded c. both a and b d. neither a nor b
When circuit breaker are installed in enclosed switchboards, they are usually derated to a certain percentage. What is this percentage? a. 60% b. 80% c. 50% d. 70%
Which of the following requires a moisture seal at all points of termination? a. underplaster extensions b. bare conductor feeders c. liquidtight flexible metal conduit d. mineral-insulated cable
For a feeder supplying household cooking equipment and electric clothes dryers the maximum unbalanced load on the neutral conductor shall be considered as ______ of the load on the ungrounded conductors. a. 40% b. 50% c. 70% d. 80%
A _______ is a protective device for limiting surge voltages by discharging or bypassing surge current, and it also prevents continued flow of follow current while remaining capable of repeating these functions. a. surge arrester b. auto fuse c. fuse d. circuit breaker
No swimming pool lighting fixtures shall be installed for operation on supply circuits over _______ volts between conductors. a. 24 b. 50 c. 120 d. 150
Service conductors between the street main and the first point of connection to the service entrance run underground is known as the service ________. a. drop b. loop c. lateral d. cable
EMT installed in a wet location, shall have it s coupling and connectors ________. a. protected against corrosion b. corrosion resistant c. raintight type d. none of these
Dual-voltage motors that have a different locked-rotor kva per horsepower on the two voltages shall be marked with the code letter for the voltage giving the ______ locked-rotor kva per horsepower. a. highest b. average c. lowest d. normal
Conductor A.W.G. numbers vary _______ to the ampacity. a. inversely b. proportionally c. directly d. bi-laterally
Type TC power and control cable may be used _________. a. in outdoor locations when supported by a messenger cable b. as open cable on brackets c. where exposed by physical damage d. none of these

Raceways on the outside of buildings shall be ______. a. watertight and arranged to drain b. weatherproof and covered c. raintight and arranged to drain d. rainproof and guarded
Receptacles mounted on ______ need not be grounded. a. outdoor circuits b. garage walls c. portable generators d. electric ranges
Which of the following may not be used in damp or wet locations? a. AC armored cable b. EMT c. open wiring d. rigid steel conduit
The ampacity of a 125 mm 2 IGS cable is ________ amperes. a. 119 b. 168 c. 215 d. 255
Which of the following is the maximum allowable rating of a permanently connected appliance where the branch overcurrent device is used as the appliance disconnecting means? a. 1/8 hp b. ¼ hp c. ½ hp d. 1 hp
Elevator traveling cables for operating ________ circuits shall contain nonmetallic fillers as necessary to maintain concentricity. I. signal II. control a. I only b. II only c. both I and II d. neither I nor II
How would you seal unused ko’s in panels and boxes? a. cardboard b. duct seal c. tape d. metal plugs and plates
Liquidtight flexible conduit shall not be permitted ______. a. in hazardous locations b. in high temperature areas c. in exposed and concealed work d. where installations requires flexibility or protection from liquids, vapors or solids
Hoistway is a ________ in which an elevator or dumbwaiter is designed to operate. a. shaftway b. hatchway c. well hole d. all of these
Where devices containing disconnecting means are mounted out of reach, suitable means shall be provided to operate the disconnecting means from the floor. Which of the following is permitted? a. devices cannot be mounted out of reach b. sticks (hook) c. ladders d. no method is permitted
________ is defined as properly localizing a fault condition to restrict outages to the equipment affected, accomplishing by choice of selective fault protective devices. a. monitoring b. coordination c. choice selection d. fault device
Conductors for festoon lighting shall be of the _____ type. I. thermoplastic II. rubber covered III. shielded a. I only b. I or II only c. II or III only d. I, II, or III
A receptacle outlet installed outdoors shall be located so that ______ is not likely to touch the outlet cover or plate. a. persons b. water accumulation c. metal d. none of these

Lampholders installed over highly combustible material shall be of the ______ type. a. porcelain b. low smoke c. switched d. unswitched
When an outlet is removed from a cellular metal floor raceway, the sections of circuit conductors supplying the outlet shall be ______. a. taped b. dead-ended c. shorted together d. removed from the raceway
Circuits used only for the operation of fire alarm, other protective signaling systems, or the supply to fire pump equipment _________to be connected on the supply side of the service overcurrent device where separately provided with overcurrent protection a. shall be permitted b. shall not be permitted c. not stated in the code d. not required by the Code
Class III locations are those that are hazardous because of ________. a. the presence of combustible dust b. over 2500 mm depth of water c. flammable gases or vapors may be present in the air d. the presence of easily ignitible fibers or flyings
The maximum number of quarter bends in one run of EMT is ________. a. two b. four c. five d. none of these
Which of the following electrical conductor has the highest resistance a. 3.5 mm 2 b. 8.0 mm 2 c. 2.0 mm 2 d. 5.5 mm 2
In the schedule of loads for motor circuits, which of the following is NOT included? a. Type of motor b. Motor as numbered or identified in the power layout c. Motor’s manufacturer d. Number of phase
What is the allowable ampacity of THW insulated copper conductor with an area of 8.0 mm 2 and exposed to an ambient temperature of 30 oC? a. 45 A b. 20 A c. 30 A d. 60 A
If the project is extensive and requires more time for checking and for computations of fees, the issuance of the electrical permit need not be issued immediately. However, the delay shall not be longer than how many working days? a. 7 b. 6 c. 5 d. 8
Location which are hazardous because of the presence of combustible dust. a. Class I b. Class II c. Class III d. Class IV
Operation at substantially constant load for an indefinitely long time. a. periodic duty b. intermittent duty c.. continuous duty d. short time duty
The minimum insulation level for the neutral conductors of solidly grounded systems shall be ______. a. 600 V b. 300 V c.. 500 V d. 1,000 V

philippine electrical code 5, Exams of Electrical Engineering

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