JOSE C.

FELICIANO COLLEGE FOUNDATION

Dau Exit, North Expressway, Dau, Mabalacat, Pampanga 2010
Telephone Nos. (045) 624-5211/(045) 624-5116
Website: www.jcfc.edu.ph Email Add: jcfc@pldtsl.net

INSTITUTE OF TEACHER EDUCATION

2nd Semester, A.Y. 2016-2017

MIDTERM EXAM BASIC ELECTRICITY

Name_______________________________________________________ Date:________________

Course title:___________________ Year:_______________ Score:_______________

DIRECTIONS:
 This exam contains 25 multiple choice questions, each worth 2 points.
 Encircle the correct answers for each question. Make sure that your answer is clearly marked.
You will not receive partial credit for any work done.

Erasures are considered as WRONG

1. A meter used to measure both AC and DC voltage and current is known as which of the following.

A. An ohms meter B. A multimeter C. A resistance meter D. None of the above

2. Which of the following materials is used on conduits inside and outside of a box.

A. Bushing B. Couplings C. Lock nuts D. All of the above

3. What is the conductor power loss in watts for a 120v circuit that has a 3% voltage drop and
carries a current flow of 12A?

A. 43w B. 86w C. 172w D. 1,440w

4. Which of the following is used to control speed in a DC motor?

A. Field winding B. A primary transformer C. Ground fault breaker D.A bonding jumper

5. An incandescent lamp filament is made of nickel.

A. True B. False

6. Which of the following conductor type is both moisture and heat resistant?

A. THHN B. THW C. XHHW D. None of the above

7. Conductors are materials that can be charged by rubbing them against other wires.

A. True B. False

8. Bonding safely conducts any fault currents which may arise.

A. True B. False

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9. If a two-wire 120 volt circuit has one grounded conductor and supplies a single-phase 5
horsepower motor, then the required number of overloads is which of the following.

A. Two, one in each conductor B. One in the grounded conductor

C. One in the ungrounded conductor D. Zero, no overload is required

10. In a lamp holder, which of the following is true of the grounded conductor?

A. It would connect to the screw shell B. It is the lead wire

C. It would be fire-retardant D. All of the above

11. An electrical lighting timer switch is generally connected in parallel with the lighting.

A. True B. False

12. In application where high starting torque is required, DC series motors are generally used.

A. True B. False

13. In order to correct a low power factor, which of the following should be checked first.

A. Resistance B. Watts C. Inductive load D. All of the above

14. A wire system has two lengths of wires, where wire A has a resistance of 10 ohms and wire B is
three times the length of wire A with two times the cross-sectional area, which means that resistance
of wire B is equal to which of the following.

A. 30 ohms B. 20 ohms C. 15 ohms D. 10 ohms

15. The wattage rating of a resistor determines its ability to absorb heat.

A. True B. False

16. The sum of series voltage drops equals the applied voltage.

A. True B. False

17. It is a devices that hold and protect the lamp and ar also called as “Lamp sockets/Receptacles”
These come in many designs and sizes.

A. Circuit Breaker B. Lamp Holder C. Junction box D. AWG

18. A device that connects and disconnects the flow of electric current in a circuit.

A Lamp holder B. Switch C. Sockets D. Conduit

19. A circuit protective device that automatically blows and cut the current when and over load or
short circuit.

A. Fuse B. switch C. conduit D. Lamp

20. It is a protective device used to automatically blows and cuts the current when trouble in the
circuit such as short circuit or overload occurs.

A. Main source B. Circuit Breaker C. Switch D. Lamp

21. An octagonal shaped electrical material where the connections or joints of wires are being done.
It is also where the flush type lamp holder is attached. This could be made of metal or plastic.

A. Circuit Breaker B. Junction box C. Lamp holder D. Meter

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22. A rectangular shaped metallic or plastic (PVC) materials in which flush type convenience outlet
and switch are attached.

A. Meter B. AWG C. Source load D. Utility box

23. Is a duplex stranded wire used for temporary wiring installation and commonly used in extension
cord assembly. It comes in a roll of 150 meters and with sizes of gauge # 18 and gauge # 16 AWG
(American wire gauge)

A. Flat cord B. Load of Energy C. Circuit Breaker D. Meter

24. Which is made of multiple strands joined together to make a single wire.

A. Solid wire B. Source wire C. Meter D. Stranded Wire

25. Is a made of a single strand of copper or aluminum wire. These are used in wiring installation
inside and outside the building.

A. Solid wire B. Stranded wire C. Source D. Meter

26. It is a electrical materials used as the passage of wires for protection and insulation. these could
be rigid metallic, flexible, metallic conduit. and rigid non- metallic.

A. Conduits/pipes B. Meter C. Cross joints D. Junction Box

27. An electrical materials used to hold and anchor electrical conduits in its proper position.

A. Junction box B. Utility box C. Clamps D. Conduit

28. Used to attach metallic or non-metallic conduit to the junction or utility boxes.

A. Connectors B. Clamps C. Current flow D. Conduit

29. This kind of joint is commonly used to join two or more conductors inside the junction box. It is
suitable for service where there is no mechanical stress when wires are to be connected in an outlet
box, switch or conduit fitting.

A. Knotted tap B. Rat tail or Pig tail C. Cross joint D. Tee joint

30. This is used where the tap wire is under heavy tensile stress.

A. Knotted tap B. Rat tail C. Pig tail D. Cross joint

31. This is the most widely used splice or joint in interior wiring installation to extend the length of
wire from one point to another.

A. Knotted tap B. Rat tail C. Pig tail D. Western Union Short-tie

Splice

32. The same application is done as in plan tap and the only difference is that this tap is a
combination of two plain tap place side by side with each other.

A. Pig tail B. Rat tail C. Knotted tap D. Cross joints

33. This is used extensively for outside wiring to extend the length of wire from one end to another.

A. Cross joint B. Knotted joint C. Rat tail D. Western Union Long tie

34. This is used on large solid conductors where it is difficult to wrap the heavy tap wire around the
main wire.

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A. Y-joint B. Tee-joint C. Cross joint D. Wrapped tap

35. This is used on large solid conductors where it is difficult to wrap the heavy tap wire around the
main wire.

A. Y-joint B. Tee-joint C. Cross joint D. Wrapped tap

36. This is used as a temporary tap usually done in constructions sites the easy twist will facilitate tap
wire movement.

A. Tee joint B. Cross joint C. Aerial tap D. Wrapped tap

37. The circuit conductors between service equipment and the final branch circuit over current
device are considered to be which of the following.

A. Service laterals B. Feeder conductors C. Grounded conductors D. A wire assembly

38. When a switch on a 110 amp system is closed, the total resistance of the switch is equal to which
of the following:

A. 55 amps B. 220 volts C. 1100 ohms D. Zero

39. The armature reaction in an alternator is magnetizing at lagging loads.

A. True B. False

40. A three horsepower motor is equivalent to which of the following in watts:

A. 746 watts B. 2238 watts C. 3000 watts D. None of the above

41. When reduced to the most nominal component, the smallest element of matter is which of the
following:

A. An atom B. Electrons C. One ohm of electrical current D. None of the above

42. In generator, voltage is produced by which of the following conditions:

A. Electrical pressure B. Vibration C. Magnetism D. Cutting lines of force

43. Of all the materials used for insulation, which of the following has the highest electrical
breakdown strength and the longest life:

A. Rubber B. Cloth C. Impregnated paper D. Colored vinyl

44. A wire secured at one end with the other end fastened to a pole under tension is known as which
of the following:

A. Messenger wire B. A service drop C. A guy wire D. None of the above

45. Which of the following is characteristic of inductance?

A. It creates opposition to voltage B. It opposes changes in current

C. It creates changes current D. None of the above

46. Illumination is measured in which of the following units:

A. Lumens B. Foot candles C. Light per square inch D. None of the above

47. Some copper conductors are tinned to help prevent chemical reaction:

A. True B. False

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48. The electrical property of conductors that allows them to oppose the free flow of current traveling
over them is measured in which of the following:

A. Amperes B. Ohms C. Volts D. Watts

49. Two equally valued resistors in series have a total resistance of which of the following:

A. Twice as much as one of the resistors B. The sum of one

C. The difference between each resistance D. None of the above

50. If the circuit breaker is installed vertically and the handle is flipped up, then the circuit breaker
will be which of the following:

A. Off B. Unable to operate properly C. On D. Lock in place

Prepared: Approved:

Richard A. Manansala Farraday D. Valenton, MA SPED

College Faculty OIC, ITED

Approved by:

ATTY: Manuel M. Feliciano

President JCFC