QUESTION BANK #9

10. Which of the following is the rotating part of a large alternator' A. Field B Armature C. Yoke D. Commutator

A

100. One of the approved grounding electrode system is using the metal underground water pipe in direct contact with earth for ___ or more. A. 3,000 mm B. 4,000 mm C. 2,500 mm D. 1,500 mm

A

17. How much charge is stored in a 2 µF capacitor connected across a 50-V supply? A. 100 µC B. 25 µC C. 200 µC D. 120 µC

A

23. In a "STOP-START" motor controller using contactors, how many contactors are needed? A. Only one B. Two C. Either A or B D. Any number

A

24. SI unit of luminous flux. A. Lumen B. Lux C. Foot-candle D. Candle

A

30. The ampere-hour capacity of the battery depends on A. The area of the plates B. the distance between the plates C. the thickness of the plates D. the strength of the electrolytes

A

35. In automobiles, it prevents the arcing at the distributor points when they began to open. A. Condenser B. Ignition coil C. Contact points D. Spark plug

A

40. To forward bias a diode, its cathod is connected to the ___ terminal of the supply. A. negative B. positive C. either A or B D. neither A or B

A

45. In radio, gang condenser is a type of. A. air capacitor B. electrolytic capacitor C. paper capacitor D. variable capacitor

A

46. A method of stopping a polyphase motor quickly by momentarily connecting the motor for reverse rotation. A. Plugging B. Jogging C. Inching D. Latching

A

48. How can the polarization index of transformer oil be improve? A. filtering B. vacuuming C. heating D. all of these

A

52. 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

A

55. Sheet metal of flush and recessed fixture housing shall be protected against corrosion and shall NOT be less than ___thick. A. 0.65 mm B. 0.60 mm C. 0.64 mm D. 0.63 mm

A

61. The floor of transformer vaults in contact with the earth shall be of concrete NOT less than _____ thick. A. 100 mm B. 200 mm C. 300 mm D. 250 mm

A

64. Any switch or device normally used to start and stop a motor by making and breaking the motor circuit current. A. controller B. rheostat C. autotransformer D. double pole double throw switch

A

68. Hazardous locations, in which volatile flammable liquids or flammable gases are handled processed or used. A. Class I, Division 2 B. Class II, Division 2 C. Class II Division 1 D. Class I Division 1

A

75. The down conductors shall be protected for a minimum distance of ______ above grade level. A. 1,800 mm B. 1,600 mm C. 1,700 mm D. 1,500 mm

A

76. If the trade name of the conductor is "heat resistant rubber" what type letter is it? A. type RH B. type RHW C. type THHW D. type MTW

A

78. Exposed energize parts of motor and controllers operating at _____ volts or more between terminals shall be guarded against accidental contact by enclosure. A. 50 B. 30 C. 40 D. 60

A

81. Wires or cables used in dry and wet location for over 2000 volts insulation and ozone resistant with moisture and heat resistant rubber and has a maximum operating temperature of 90oC is ____ type? A. MI B. RHW C. THW D. THHN

A

84. What type of conductors is used for machine tool wiring in dry or wet locations? A. type MTW B. type RHW C. type MI D. type UF

A

9. To keep the terminals of a lead add storage battery free from corrosion, it is advisable to A. Keep the electrolyte level low B. Apply petroleum jelly C. Charge the battery at frequent intervals D Dean the terminals frequently

A

91. Electrodes of pipe or conduit shall NOT be smaller than ____ trade size. A. 20 mm B. 15 mm C. 25 mm D. 32 mm

A

97. Motors with marked temperature rise not over 40oC shall have an overload protection equal to _____ percent of the motor full load current. A. 115 B. 125 C. 110 D. 100

A

RME Board Exam 38. A dc motor can easily be identified by A. commutator B. size of conductor C. winding D. yoke

A

20. Neutral current is the same as A. no-charge current B. ground current C. eddy current D. normal current

B

25. To obtain proper short circuit protection for a service, one should use a A. Iimiting resistor B. current limiting fuse C. time delay relay D. time delay breaker

B

28. A certain motor takes 350 A at 100 V and the hp output is 45. What is its efficiency? A. 94.6% B. 95.9% C. 97.2% D. 93.5%

B

29. A capacitor consists of two ____ A. insulators separated by a conductor B. Conductors separated by an insulator C. Conductors D. Insulators

B

31. If the line to line voltage of a 3-phase grounded system is 208 volts, what is the voltage between any of the three lines and the ground? A. 208 V B. 120 V C. 147 V D. 69.3 V

B

33. A battery is rated 200 Ah. If it is use to supply a constant current of 8 A, how long can the battery last until it becomes unstable? A. 20 hour B. 25 hours C. 15 hour D. 30 hours

B

34. Synchronous motors are A. self-starting B. not self-starting C. either A or B D. neither A or B

B

37. Which of the following is measured by a megger? A. Small current B. Insulation resistance C. Small voltage D. Grounded voltage

B

39. The d's Arsonval meter is what type of a meter movement? A. Moving iron B. Moving coil C. Both A and B D. Neither A or B

B

4. Electrical instrument use to measure electrical power. A. Kilowatt-hour meter B. Wattmeter C. Clamp ammeter D. Galvanometer

B

43. A transformer will work on what type of supply? A. dc B. ac C. either A and B D. neither A or B

B

47. If a motor is to be controlled from two different locations, the START buttons are connected in. A. Series B. Parallel C. Series-parallel D. Parallel-series

B

49. If the resistance of the circuit is 25 ohms, what voltage is necessary for a current flow of 2 A? A. 6.25 V B. 100 V C. 0.16 V D. 400 V

B

5. Three resistors are to be connected in four possible type of circuit connections namely, series, parallel, series-parallel and parallel-series. Which type of connection will give the least amount of equivalent resistance? A. Series B. Parallel C. Series-parallel D. Parallel-series

B

62. Where raceways are exposed to widely different temperatures they shall be____. A. grounded B. sealed C. isolated D. bonded

B

63. Not less than ____ of free non heating lead shall be within the junction box. A. 100 mm B. 150 mm C. 175 mm D. 200 mm

B

65. Where installed in raceways conductors of size ____ and larger shall be stranded. A. 5.5 mm2 B. 8.0 mm2 C. 14 mm2 D. 3.5 mm2

B

7. A universal motor is a _____ motor. A. Shunt wound B. Series wound C. Compound wound D. Any of these

B

79. The derating factors for the number of wires in a raceway shall not apply to conductors in nipples having a length NOT exceeding ____. A. 500 mm B. 600 mm C. 760 mm D. 300 mm

B

8. Type of diode used to regulate dc power voltage supply. A. Shockley B. Zener C. Tunnel D. SCR

B

80. Lamps installed in scene docks shall be so located and guarded and shall provide an air space of NOT less than _____ between such lamps and any combustible material. A. 75 mm B. 50 mm C. 40 mm D. 64 mm

B

89. Fuses, circuit breakers or combinations thereof shall NOT be connected in_____. A. series B. parallel C. both A and B D. neither A or B

B

92. For single-phase AC or DC motors supplied by a 3-wire, single-phase AC and DC with grounded neutral, the number of overload units required shall be. A. one, in the grounded conductor B. one, in either ungrounded conductor C. two, in both ungrounded conductors D. three, in all conductors

B

94. For wound rotors, to determine the maximum setting of its short circuit protective device, using a fuse or an inverse time circuit breaker, a multiplying factor of ____ of its current rating shall be used. A. 125% B. 150% C. 250% D. 200%

B

95. One equipment shall in sight from another equipment not more than ______ from the other. A. 10 m B. 15 m C. 20 m D. 5 m

B

98. The minimum temperature at which a given liquid gives off vapor in sufficient concentration to form an ignitable mixture. A. Kindling temperature B. Flash point C. Absolute temperature D. Heat of fusion

B

12. Who shall be the executive officer of the Board of Electrical Engineering and shall also conduct the examination given by the Board, as provided In Art II, Sec 9, of the New Electrical Engineering Law' A. A member of the Board of Electrical Engineering B. The President of the Philippines C. The Commissioner of the Professional Regulations Commission D. The Chairman of the Board of Electrical Engineering

C

13. A voltage regulator on a shunt wound generator varies the _____. A. armature current B. resistance of the armature circuit C. resistance of the field circuit D. resistance of both the armature and field

C

14. A 100-W bulb is connected in series with a room heater of 750 W. what will happen if the bulb is replaced by a 60 W bulb? A. heater output will increase B. bulb will not glow C. heater output will decrease D. heater output remain unchanged

C

15. Which of the following unbalanced loads is the most difficult to handle? A. delta connected loads B. 4-wire star connected load C. 3-wire star connected load D. all of these

C

2. The output of a shunt generator is 500 A at a terminal voltage of 250 v. If the shunt resistance is 50 ohms, what is the armature current? A. 500 A B. 495 A C. 505 A D. 510 A

C

21. Three 9-ohm resistors are connected in parallel across a 24-V source. The total power taken by the circuit is A. 120 W B. 240 W C. 192 W D. 190 W

C

27. Reciprocal Of resistance. A. Susceptance B. Reluctance C. Conductance D. Admittance

C

3. A motor circuit ____. I. Carries the electric signals to the controller, and carried the main power II. Does not carry the electric signals to the controller, but carries the main power III. Carries the electric signals to the controller, but does not carry main power A. I only B. II only C. III only D. None of these

C

32. The RMS value of a sinusoidal wave is equivalent to ___ times the peak value. A. 1.732 B. 0.577 C. 0.707 D. 1.414

C

42. Which of the following motors has no commutator? A. Shunt motors B. Universal motors C. Induction motors D. Repulsion motors

C

50. What type of dc motors is suitable for heavy-duty load application s such as in mills and crushers? A. Series B. Shunt C. Cumulative compound D. Differential compound

C

53. Which of the following statements is NOT true about grounding electrode conductor? A. It shall be solid or stranded B. It must be continuous C. Splice or joints are allowed D. It shall be insulated covered or bare.

C

54. 8.0 mm2TW copper has an ampacity equal to ______. A. 30 A B. 50 A C. 40 A D. 60 A

C

58. To improve the insulation resistance of a motor, it is first cleaned, washed, varnished then baked. Which is very economical and effective method of baking particularly the inside coils of a large motor? A. Putting incandescent lamps around the winding and cover B. Hanging resistor strips inside the core and cover C. Putting it inside the baking oven and control the oven temperature D. Connecting the terminals to a variable low voltage supply and increase the baking current gradually until the desired baking temperature is attained, making sure that the rated current is not exceeded

C

6. What is the size in square millimeters (mm²) of the cable 250 MCM in size? A. 150 mm² B. 135 mm² C. 125 mm² D. 145 mm²

C

67. Where no standard electrical equipment of the exact size or rating required is available, _______ maybe used. A. The next lower standards size B. any size C. the next larger standard size D. none of these

C

69. The permanent joining of metallic parts to form an electrically conductive path which will assure electrical continuity and the capacity to conduct safely likely to be imposed. A. Welding B. Molding C. Bonding D. Splicing

C

71. The uses of non-metallic extensions are NOT allowed in all but one of the following, which is one this? A. As an aerial cable B. Where exposed to corrosive vapors C. Where subject to corrosive vapors D. Through floors or partitions

C

72. Metal fixtures transformers and transformers enclosure on circuits operating at over _______ volts to ground shall be grounded. A. 250 B. 100 C. 150 D. 300

C

74. When the voltage between conductors does not exceed 300 V and the roof hasa slope of not less than 100 mm in 300 mm, the clearance can be reduce to. A. 500 mm B. 800 mm C. 1000 mm D. 900 mm

C

77. A circle with the letter of B stands for. A. Buzzer outlet B. Pushbutton outlet C. Outlet with blank cover D. Bell outlet

C

86. Cartridge fuses and fuse holders shall have a maximum operating voltage of _____. A. 150 V B. 500 V C. 300 V D. 250 V

C

88. An enclosure either above or below ground, with fire resistant walls, ceiling and floor exclusively built for unattended transformer and their auxiliaries. A. Transformer housing B. Transformer yard C. Transformer vault D. None of these

C

99. Lamp holders installed over highly combustible material shall be located at least ____ above the floor. A. 2,000 mm B. 2,500 mm C. 2,400 mm D. 2,600 mm

C

RME Board Exam 87. At least ____ of free conductor shall be left at each outlet, junction and switch point for splices or the connection of fixtures or devices. A. 200 mm B. 100 mm C. 150 mm D. 300 mm

C

1. Which of the following is TRUE regarding a reverse power relay? A. It protects motor from running in reverse rotation B. It keeps amperage at safe level C. It keeps voltage at safe level D. It protects a generator from motorizing

D

11. A material with atoms in which the electrons tend to stay in their orbits. A. Inductor B. Conductor C. Intrinsic D. Insulator

D

16. If a split-phase induction motor fails to start, one of the following causes is A. there is no voltage B. faulty cut-out switch C. open overload device D. all of these

D

18. A circuit that does not provide a complete path for the flow of the current is____. A. a closed circuit B. a grounded circuit C. a series circuit D. an open circuit

D

19. PLC is one of the modern types of controller. What do you mean by PLC? A. Programmable Logic Counter B. Programmable Language Controller C. Programmable Laboratory Controller D. Programmable Logic Controller

D

22. What is the secondary voltage of a transformer that has a primary voltage of 100 V, primary turns of 200 and secondary turns of 40? A. 500 V B. 25 V C. 4 V D. 20 V

D

26. Ratio of maximum load to the A. Diversity factor B. Utilization factor C. Power factor D. Demand factor

D

36. A dc generator that has a voltage rise from no-load to full load. A. Differential compound B. Under compounded C. Flat compounded D. Over compounded

D

44. A bridge type rectifier uses how many diodes? A. One B. Two C. Three D. Four

D

51. Fuses shall be plainly marked with______. A. ampere rating B. voltage rating C. interrupting rating D. all of these

D

56. Exposed energized parts of motors and controllers shall be guarded against accidental contact by elevating it ______ or more above the floor. A. 2,500 mm B. 2,300 mm C. 2,600 mm D. 2,400 mm

D

57. Which of the following statement is NOT true regarding a rosette? A. Fusible rosette shall be installed B. Rosettes installed in damp or wet locations shall be of weatherproof type C. Separable rosettes that may change polarity shall not be used D. None of these

D

59. Ground terminal shall be____. A. solid plate B. stranded cable C. solid wire or rod D. all of these

D

60. The construction of metal cabinets and cutout boxes shall be such as to secure strength and rigidity. If constructed or uncoated sheet steel, the metal thickness should NOT be less than. A. 1.55 mm B. 1.75 mm C. 1.00 mm D. 1.35 mm

D

66. What type letter for conductors has a trade name "moisture resistant thermoplastic"? A. TW B. THHW C. THWN D. THHN

D

70. In mobile homes, if a range, clothes dryer or similar appliance is connected by metal covered cable or flexible metal conduit, a length of NOT less than _____ of free cable or conduit shall be provided to permit moving the appliance. A. 800 mm B. 700 mm C. 600 mm D. 900 mm

D

73. Grounding electrodes shall be installed such that at least ____ of length is in contact with the soil. A. 2,000 mm B. 1,500 mm C. 2,500 mm D. 2,400 mm

D

82. Direct burial cables or conductors with a nominal voltage of 660V or less and placed under a one or two family dwelling driveways and parking areas shall have a minimum cover distance of ____. A. 480 mm B. 500 mm C. 440 mm D. 460 mm

D

83. A certain residential house has lighting load of 1.1 kVA and an appliance load of 10 A at 220 volts, single phase, two wires, 60 Hz. The branch circuit fuse protections for lighting and appliance load are _____ and _____ respectively. A. 30 A, 60 A B. 20 A, 30 A C. 15A, 30 A D. 15 A 20 A

D

85. The Building Code (PD 1096) of Philippines has several referral codes. The only no referral code is. A. The Philippines Electrical Code B. Fire Code C. Structural Code D. Chemical Engineering Code

D

90. Which of the following cables is NOT used as an electrical cable? A. Flat cables B. Optical fiber cables C. Armored cables D. Steel cables

D

93. The ampacity of branch circuit conductors and the rating or setting of over current devices supplying fix electric space heating equipment for pipelines and vessels shall be not less than ___ percent of the total load of the heaters. A. 120% B. 110% C. 115% D. 125%

D

96. For office buildings, a general lighting load of ____ VA/m2 shall be used. A. 12 B. 16 C. 24 D. 28

D

RME Board Exam 41. A tool that is used to align conduits in multiple ducts is a ___ A. hickey B. manometer C. growler D. mandrel

D