This is the Multiple Choice Questions Part 12 of the Series in Philippine Electrical Code (PEC) as one of the Electrical Engineering topic. In Preparation for the REE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including but not limited to past Board Exam Questions in Electrical Engineering field, Electrical Engineering Books, Journals and other Electrical Engineering References.
Continue Practice Exam Test Questions Part 12 of the Series
⇐ MCQ in Philippine Electrical Code (PEC) Part 11 | REE Board Exam
Choose the letter of the best answer in each questions.
551. For all single-phase motors, to protect them from short circuits and ground faults, a multiplying factor of _____ of its full load current rating shall be used the protective device selected is a non-time delay fuse and _____ if the protective device is a time delay fuse.
A. 300%, 175%
B. 300%, 150%
C. 250%, 175%
D. 250%, 150%
Answer: Option A
Solution:
552. Flexible metal conduit shall be supported within ____ on each side of every outlet box, junction box, cabinet or fitting.
A. 300 mm
B. 200 mm
C. 460 mm
D. 150 mm
Answer: Option A
Solution:
553. The maximum electrical trade size of electrical metallic tubing shall be_____.
A. 125 mm
B. 150 mm
C. 100 mm
D. 200 mm
Answer: Option C
Solution:
554. RME Board October 1996
For installations of 2.0 mm2 conductors in 600-v circuits, what is the minimum insulation resistance allowed by the Philippine Electrical Code?
A. 1,000,000 Ω
B. 750,000 Ω
C. 250,000 Ω
D. 500,000 Ω
Answer: Option D
Solution:
555. Askarel insulated transformers installed indoors and rated over ____ kVA shall be furnished with a pressure relief vent.
A. 37.5
B. 25
C. 50
D. 15
Answer: Option B
Solution:
556. In straight pulls, the length of the pull box shall not be less than _____ times the trade diameter of the largest raceway.
A. 8
B. 6
C. 10
D. 5
Answer: Option A
Solution:
557. REE Board October 1998
Busways shall be securely supported at intervals NOT exceeding ____ unless otherwise designed and marked.
A. 1,000 mm
B. 2,000 mm
C. 2,500 mm
D. 1,500 mm
Answer: Option D
Solution:
558. The smallest electrical trade size of a liquidtight flexible non-metallic conduit shall be.
A. 15 mm
B. 12 mm
C. 20 mm
D. 25 mm
Answer: Option C
Solution:
559. Boxes intended to enclose flush devices shall have an internal depth of NOT less than ____.
A. 24 mm
B. 20 mm
C. 16 mm
D. 28 mm
Answer: Option A
Solution:
560. A branch circuit supplying a fixed storage type water heater having a capacity of 450 liters or less shall have a rating not less than _____ of the nameplate rating of the water heater.
A. 100%
B. 115%
C. 120%
D. 125%
Answer: Option D
Solution:
561. Defined as the shortest distance measured between a point on the top surface of any direct buried conductor, cable, conduit and the top surface of finish grade.
A. Trench
B. Cover
C. Tray
D. Duct
Answer: Option B
Solution:
562. A wall screen or fence less than ____ in height shall NOT be considered as a preventing access unless it has other features that provide a degree of isolation equivalent to the height of the fence in question.
A. 2,000 mm
B. 2,500 mm
C. 3,000 mm
D. 1,500 mm
Answer: Option B
Solution:
563. RME Board April 1994
Branch circuit conductors supplying a single phase motor shall have an ampacity NOT exceeding
A. 100%
B. 125%
C. 200%
D. 115%
Answer: Option B
Solution:
564. Pits within ____ horizontally from the flammable vapor source, shall be considered a hazardous location under Class I, Division I location
A. 6,000 mm
B. 5,000 mm
C. 7,600 mm
D. 4,600 mm
Answer: Option C
Solution:
565. Type TW conductor is a ____ type.
A. moisture and heat resistant
B. moisture and heat resistant thermoplastic
C. moisture resistant and thermoplastic
D. heat resistant and thermoplastic
Answer: Option C
Solution:
566. The current in amperes a conductor can carry continuously under the conditions of use without exceeding its temperature rating
A. Ampacity
B. Capacitivity
C. Rating
D. Amperage
Answer: Option A
Solution:
567. RME Board October 1995
Flat conductor cables maybe installed in any of the following location EXCEPT one. Which one is this?
A. On hard concrete flooring
B. In wet locations
C. For branch circuits
D. In damp locations
Answer: Option B
Solution:
568. Operation of loads and intervals of time both of which maybe subject to wide
A. Periodic duty
B. Intermittent duty
C. Continuous duty
D. Varying duty
Answer: Option D
Solution:
569. For equipment rated 1200 A and over 1,900 mm wide containing overcurrent devices and control devices at least one entrance of NOT less than ____ wide and ____ high shall be provided at each end.
A. 600 mm, 2,000 mm
B. 600 mm, 2,500 mm
C. 80 mm, 2,000 mm
D. 800 mm, 2,500 mm
Answer: Option A
Solution:
570. Batteries and direct current circuits shall be physically separated by at least a ___ gap or other approved means from circuits of a different power source.
A. 12 mm
B. 15 mm
C. 20 mm
D. 10 mm
Answer: Option A
Solution:
571. Where contactors are used as the disconnecting means for fuses an individually externally operable switch, such as tumbler switch for the control of each contractor shall be located at a distance of not more than ____ from the contactor.
A. 1,500 mm
B. 1,800 mm
C. 2,000 mm
D. 2,400 mm
Answer: Option B
Solution:
572. No electrical installation, alteration and or addition shall be connected or reconnected to any power supply or any other source of electrical energy without
A. an electrical permit
B. an application for inspection
C. certificate of payment
D. certificate of final inspection
Answer: Option D
Solution:
573. RME Board April 1996
Four (4) 3-phase motor are supplied by one common feeder cable. The full load current ratings of the motors are 10 A, 20 A, 30 A, and 40 A. What should be the minimum ampacity of the feeder cable?
A. 110 A
B. 125 A
C. 150 A
D. 100 A
Answer: Option A
Solution:
574. Thermal barrier shall be required if the space between the resistors and reactors and any combustible material is less than ____.
A. 600 mm
B. 400 mm
C. 500 mm
D. 300 mm
Answer: Option D
Solution:
575. The ampacity of conductors that connect a capacitor to the terminals of a motor circuit conductor shall not be less than ____ the ampacity of the motor circuit conductors and in no case less than 135% of the rated capacitor current.
A. one-third
B. one-fourth
C. one-half
D. one-fifth
Answer: Option A
Solution:
576. The load for each ungrounded feeder and services conductor supplying 5 to 8 receptacles that supply shore power for boats shall be calculated as ____ of the sum of the rating of the receptacles.
A. 80%
B. 70%
C. 90%
D. 60%
Answer: Option C
Solution:
577. RME Board October 1994
A device actuated by the operation of some devices with which it is directly associated to govern succeeding operations of some or allied devices
A. Selsyn
B. Automatic
C. Interlock
D. Relay
Answer: Option C
Solution:
578. RME Board October 1994
The underground service conductors between the street main, including any risers at pole or other structure or from transformers and the first point of connection to the services entrance conductors.
A. Service drop
B. Service cable
C. Service lateral
D. None of these
Answer: Option C
Solution:
579. For 101 A to 200 A circuits, the minimum insulation required shall be____
A. 50,000 ohms
B. 100,000 ohms
C. 250,000 ohms
D. 75,000 ohms
Answer: Option A
Solution:
580. Which of the following is NOT a standard kVA rating of a single-phase transformer?
A. 175
B. 150
C. 167
D. 100
Answer: Option A
Solution:
581. RME Board October 1995
For voltage above 600 V, the minimum insulation resistance shall be ____
A. 1,500,000 ohms per kilovolt rating
B. 500,000 ohms per kilovolt rating
C. 1,000,000 ohms per kilovolt rating
D. 2,000,000 ohms per kilovolt rating
Answer: Option C
Solution:
582. The rating of any cord and plug connected utilization equipment shall NOT exceed ____ of the branch circuit rating.
A. 100%
B. 80%
C. 125%
D. 90%
Answer: Option B
Solution:
583. If there will six or more 2-wire branch circuits, the service disconnecting means shall NOT be smaller than ____.
A. 100 A
B. 90 A
C. 60 A
D. 30 A
Answer: Option A
Solution:
584. For direct current motors, the multiplying factor to be used in selecting the size of overcurrent device using an inverse time CB shall be____ percent of its full load current.
A. 125
B. 150
C. 175
D. 200
Answer: Option B
Solution:
585. Specifications written on the plans or submitted on separate standard size sheets shall show_____.
A. types of writing, i.e. service entrance, branch circuit, feeders, etc.
B. nature of electrical services, i.e. no. of phase, voltage, frequency, etc.
C. special equipment5 to be installed indicating ratings
D. all of these
Answer: Option D
Solution:
586. RME Board April 1996
An appliance which is fixed in one place to another in normal use
A. Fixed appliance
B. Stationary appliance
C. Portable appliance
D. None of these
Answer: Option B
Solution:
587. In starting a large DC motor, a starter is primarily used in order to
A. save electrical power
B. limit the starting current
C. add more power
D. reduce the voltage drop
Answer: Option B
Solution:
588. Hazardous locations in which easily ignitable fibers are stored and handled.
A. Class III, Division 2
B. Class III, Division 1
C. Class II, Division 2
D. Class II, Division 1
Answer: Option A
Solution:
589. In commercial garages, repair and storage areas, the entire area up to a level of ____ above the floor shall be considered to be Class I, Division 2 hazardous location
A. 400 mm
B. 500 mm
C. 460 mm
D. 450 mm
Answer: Option C
Solution:
590. Conductors passing over roof surface, a vertical clearance of ____ shall be maintained.
A. 2,500 mm
B. 1,500 mm
C. 2,000 mm
D. 3,000 mm
Answer: Option A
Solution:
591. What is the minimum vertical clearance for service drop conductors (not over 600 volts) above finished grade or sidewalks accessible only to pedestrians?
A. 3100 mm
B. 3700 mm
C. 4600 mm
D. 5500 mm
Answer: Option A
Solution:
592. RME Board Exam April 1996
Busways shall be permitted to be installed behind panels if means of access are provided and if the conditions below are met. One of them is NOT valid. Which one is this?
A. No over current are installed on the busway other than for an individual fixture
B. The busway is so installed that the joints between sections and fitting are accessible for maintenance purposes
C. The busway is open and of the ventilator type
D. The space behind the panels is not for air handling purposes
Answer: Option C
Solution:
593. The OCPD for resistance welders shall NOT exceed _____ of the conductor’s ampacity supplying the circuit.
A. 200%
B. 250%
C. 300%
D. 400%
Answer: Option C
Solution:
594. For installations to supply only limited load of a single branch circuit, the service disconnecting means shall have a rating of NOT less than _____.
A. 20 A
B. 30 A
C. 40 A
D. 15 A
Answer: Option D
Solution:
595. Metal clad cable (MC) can be used in systems of 600 V or ____.
A. less
B. more
C. both A and B
D. neither A and B
Answer: Option B
Solution:
596. Open conductors passing over residential driveways and those commercial areas not subject to truck traffic where the voltage exceeds 300 V to ground shall have a vertical clearance of ____.
A. 3,700 mm
B. 4,600 mm
C. 3,100 mm
D. 5,500 mm
Answer: Option B
Solution:
597. MC cable insulation have a maximum operating temperature of not less than ____.
A. 75°C
B. 80°C
C. 90°C
D. 60°C
Answer: Option C
Solution:
598. The ampacity of conductors in non-metallic sheathed cable shall be used at ____.
A. 75°C
B. 60°C
C. 90°C
D. 80°C
Answer: Option B
Solution:
599. What is the radius of a solid round conductor, which id the nearest equivalent of a stranded conductor whose total area is exactly 8.0 mm²?
A. 1.597 mm
B. 1.596 mm
C. 3.191 mm
D. 3.192 mm
Answer: Option C
Solution:
600. For high impedance grounding, the system _____ conductor shall not be connected to the ground EXCEPT through the grounding impedance.
A. line
B. neutral
C. both A and B
D. neither A and B
Answer: Option B
Solution:
⇒ MCQ in Philippine Electrical Code (PEC) Part 13 | REE Board Exam
Questions and Answers in Philippine Electrical Code
Following is the list of practice exam test questions in this brand new series:
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