問題一覧
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27. What type of hand tools commonly used in boring of ½ “diameter hole in a panel board
C. Knock out puncher and adjustable wrench
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20. It is the connection between the grounded circuit conductor and the equipment grounding conductor at the service conductor
C. Bonding jumper, main
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5. A mechanical device such as locknut, bushing or connectors intended primarily for a mechanical rather than an electrical function.
B. Fittings
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4. One most advantage of using rubber insulation tape in splice is______.
C. Does not absorb much moisture
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9. A mechanical connector that is crimped unto a conductor for both splice and termination is known as.
C. Mechanical lug
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8. The box use for convenience outlet.
D. Utility box
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29. What are the type of fitting commonly used for tightening between the boxes and the conduit
A. Straight connector
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12. A live duplex wire can be de-energized quickly and safely by cutting
D. One by one using diagonal cuter
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13. When measuring load current, an ammeter is connected____.
B. In series with the load
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3. When tightening a terminal screw connection with the splice wire, the end to the splice wire should pass around the screw in the same direction as the screw is turned, so that_______.
C. The will not turn off
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1. A type of diagram that use in designing or troubleshooting electrical installation control equipment so arrangement to simplify the tracing of the circuit?
B. Schematic diagram
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26. An electrician should have his tools in good condition, the most important reason being is_____.
D. Defective tools can cause accident and damage to equipment
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10. Commonly used adhesive materials for joining of PVC conduit.
B. PVC solvent
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30. The box use for typical switches
D. Utility box
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23. Which of the following is the input device
D. All of the above
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22. The technical term for the thw wires used mostly in industrial wirings is
A. Pvc insulated heat resistance
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17. What amount of current will be drawn by incandescent bulb connected to a 115-volt circuit if its resistant is 268.5 ohms
B. 0.43 amperes
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11. The size of circuit breaker to be used in 40 a motor full load current is
D. Equal to 100at
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6. What is the commonly use conduit in service entrance?
D. RSC/IMC
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15. What is the ampacity of # 8.0 sq.mm.Thw wires?
C. 25 amperes
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25. The minimum size of the conduit commonly used in laying-out of auxiliary devices
B. ¾ “ diameter
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7. What is the type of fitting commonly used for exposed conduit support.
A. Conduit strap/clamp
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16. What will you do if the load schedule reflects a 20at/2.0 sq. Mm. Lighting branch circuit of which circuit breaker is over rated?
C. Look for the wiring layout and cheek for groupings
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14. When measuring load resistance, the ohmmeter is connected_______.
C. Across the terminal of the load
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18. When measuring ballast resistance if it is defective or good, it is necessary that the source
B. De-energized
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28. A mechanical device such as lock nut, bushing or connector intended primarily for a mechanical rather than an electrical function
B. Fittings
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2. Which the following electrical parameter apply or labeled to all kind of switch
C. Rated current and rated voltage
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24. When skinning a small wire, the insulation should be “pencil down” rather that cut square to
D. Decrease danger of nicking the wire
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21. Which of the following is an output device
D. Magnetic lock
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19. A circuit is an electrical protective device which_______.
B. Protects electrical equipment from current surge and overload