1) Maximum current required to start the motor. a) Ampacity  b) Locked-rotor current  c) Peak current  d) Direct current 2) A type of cable that is a fabricated assembly of insulated conductors enclosed in flexible metal sheath. It is use both on exposed and concealed work. a) Armored cable  b) Metal clad cabale  c) Mineral insulated cable  d) Non-metallic sheathed cable 3) Two-twenty (220) volt line is advantageous over the 120 volt line for the reason that ______________. a) Economy is attained by using smaller wire  b) there is lower power loss  c) There is smaller percentage of power drop  d) All of the above 4) It is a type of transformer that produces secondary voltages less than its primary volage. a) Step-up transformer b) Step-down transformer c) Non-step transformer  d) None 5) Rotating part of electric motor which is typically constructed of a laminated steel core containing current-carrying copper wires. a) Rotor  b) Stator  c) Generator  d) NOTA 6) The maximum value of torque produced by the motor during overload without stalling. a) Locked-rotor torque  b) Pull-up torque  c) Breakdown torque  d) Full-load torque 7) In a simple circuit, when measuring the current in the line by a multimeter, the probe should be connected in ________ with the line. a) series  b) parallel – for measuring voltage  c) series-parallel  d) wye-delta 8) These are control devices consisting of coils of wire acting as electromagnets that pull a plunger (iron bar) into the core when energized. a) Solenoids  b) Signalling devices  c) Mechanical devices  d) Sensors 9) Size of AWG No. 10 wire is: a) 2.0 square meter b) 3.5 square meter c) 5.5 square meter d) 8.0 square meter 10) An electrical switch which is operated mechanically by the movement of some other piece of material or machine. a) Limit switch  b) Pressure switch  c) Float switch  d) Time switch 11) The starting current of an electric motor is ______ compared to its running current. a) Higher  b) Lower  c) The same  d) None of the above 12) Electrical equipment such as alternators, generators and electric motors operate based on what law? a) Kirchhoff’s Law  b) Electromagnetism  c) Ohm’s Law  d) Newton’s Law 13) A swine house, having a dimension of 20-ft wide by 60-ft long, requires an illumination of 200 lux. If a 25-watts fluorescent lamp with lighting intensity of 100lumen is provided, how many bulbs will be needed for the structure? a) 293 bulbs  b) 323 bulbs  c) 423 bulbs  d) 223 bulbs 14) A 12-ampere air-moving device with a power factor of 0.85 was connected to a 240-volt line. What is the power in the circuit? a) 2,200 watts  b) 2,448 watts  c) 2,848 watts  d) None of the above 15) Find the total impedance of a series circuit containing two 25-ohm resistors and an 75-ohm inductive reactance. a) 125.09 ohms  b) 90.14 ohms  c) 50.6 ohms  d) 100 ohms 16) In a 110V, 60 hz source, determine the impedance of a combine resistor and an inductor in series if the resistor value is 500 ohms and the inductor value is 2 Henrys. a) 754.6 ohms  b) 500.5 ohms  c) 904.7 ohms  d) 1254 ohms 17) What is power dissipated when a ½ amp current flows through a 5-ohm resistor? a) 2 W  b) 1 W  c) 1.25 W  d) 1.5 W 18) A poultry house has 220-volt supply, twenty-five 20-watt LED AC florescent lamps, a single phase 6-hp pump motor and scheduled to purchase a 700-watt incubator. Average ambient temperature is 29 °C. What should be the circuit breaker amperage? a) 20 A  b) 30 A  c) 60 A  d) Cannot be determined 19) The percent voltage drop must not exceed 2% for a 230-volt feeder line at 20 ampere rating. If No. 14 AWG wire of 2.58 resistance in ohm/1000ft is to be used, compute for the allowable wire length for a 2-wire feeder line. a) 18 meters  b) 12 meters  c) 10 meters  d) 60 meters 20) A circuit has a voltage source of 220V AC. The total load consists of a 50-ohm resistance, 86.7 inductive reactance and 86.7 capacitive reactance connected in series. What is the total current? a) 5 A  b) 10 A  c) 20 A  d) 30 A 21) A type of DC motor in which the field windings is connected parallel with the armature. a) Shunt-wound motor  b) Series-wound motor  c) Compound-wound motor  d) Synchronous 22) According to PEC, the maximum load to be served by the branch circuit conductors must not be more than ____ of the ampacity of the conductors. a) 60%  b) 70%  c) 80%  d) 90% 23) It is an electrical instrument that records the electrical energy consumption of an electrical equipment. a) Multitester b) Power factor meter c) Kilowatt-hour meter d) Wattmeter 24) Define by the NEC as all circuit conductors between the service equipment or the generator switchboard of an isolated plant, and the final branch circuit over current device. a) Feeder b) Panel board c) Service entrance d) None of the above 25) The second best choice of electric wire and cables by manufacturers is: a) Cesium b) Silver c) Aluminum d) Copper 26) When measuring an unknown voltage, always start with a) the highest range of the meter  b) the lowest range of the meter c) the mid-range of the meter d) none of the above 27) The standard frequency of AC electricity in the Philippines a) 60Hz b) 50Hz c) variable d) dependent on the locality 28) This happens when the electric field in a material is large enough, in which conducting paths suddenly appear in the material. Electrons flow along one or more conducting paths, creating electrical sparks. a) Electrical breakdown  b) Short circuit  c) Ground  d) Electric circuit 29) It is an electrical element that acts as a switch but without physical contact and also amplifies the signal passing through it. a) Capacitor  b) Inductor  c) Transistor  d) Diode 30) A 2-m x 10-m space is supplied with a light of 400 lux. How many foot-candle does a lamp provide into the space, assuming a coefficient of utilization of 0.80 and a service factor of 0.7. a) 25.82 foot-candle  b) 12.82 foot-candle c) 20.82 foot-candle d) 10.82 foot-candle

Review in Rural Electrification

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