BASIC ELECTRICITY
A
39) A process by joining hydrogen atoms which causes heat hotter than the sun is called ________. a. fusion b. fission c. friction d. tension
B
It determines the total resistance in a series circuit? A. The largest resistor B. The sum of the resistor C. The largest resistor minus the smaller D. The smallest resistor
B
38) A process in splitting the atom of uranum is called ________. a. fusion b. fission c. friction d. tension
D
1) A form of electricity where the flow of current is always in the same direction: a. voltage b. power c. alternating current d. direct current
D
10) To comply with the requirements of the Philippine Electrical Code, the appropriate fuse rating for lighting outlet should be ________. a. 15 amperes b. 30 amperes c. 60 amperes d. 20 amperes
A
11) Planning and designing of electrical wiring plan is being done in order to: a. Provide efficient and effective wiring system of the building. b. Maintain quality workmanship. c. Avoid overloaded circuit. d. Protect the circuit from high current.
A
12) Circuit breakers are used to protect household electrical circuits. What is the ampacity rating of the breaker used for convenience outlets or general purpose circuits? a. 20 amperes b. 30 amperes c. 15 amperes d. 60 amperes
B
13) An electrical component used to control electrical circuit in two different locations is called: a. four-way switch b. three-way switch c. push-button switch d. remote controlled switch
C
14) To conserve energy, what kind of lamp should be used in lighting fixtures? a. Incandescent lamp b. Mercury lamp c. Compact fluorescent lamp d. Neon lamp
D
15) The size of electrical wire recommended for installing lighting fixtures is: a. No. 12 AWG b. No. 10 AWG c. No. 18 AWG d. No. 14 AWG
D
16) What is the voltage required by an automatic pressure cooker having a resistance of 20 ohms when the current flowing is 8 amperes? a. 240 volts b. 480 volts c. 120 volts d. 160 volts
B
17) In a 220-volt power line, three 50-watt incandescent bulbs are connected in parallel. How many more bulbs will light if one of the bulbs is open? a. One b. Two c. All d. None
A
18) In a simple electrical connection, one of the lines of the source is connected to ________. a. Terminal 1 of the load b. Terminal 2 of the load c. Terminal 1 of the switch d. Terminal 1 & 2 of the switch
A
19) Which of the following electrical symbols in wiring diagram means that there are three wires running in a line? a. ----/-/-/---- b. -----/-/-/-/---- c. ------------ d. S3W
B
2) The force which opposes and reduces the flow of electrical current is recognized as ________. a. power b. resistance c. electromagnetism d. frequency
B
20) A series connected dry cells will result to ________. a. increase in the amount of current b. increase in the amount of voltage c. increase total resistance d. more powerful supply of electricty
D
21) What type of switch is used to control alternately three-phase line system using two sources of power? a. Double Pole Single Throw Switch b. Single Pole Double Throw Switch c. Triple Pole Single Throw Switch d. Triple Pole Double Throw Switch
C
22) Which of the following is the best conductor of electricity? a. Copper b. Aluminum c. Silver d. Gold
A
23) What type of switch is used when you want to control one lamp or group of lamps in two different locations? a. Two, 3-way switch b. One, 4-way switch c. Two, single switch d. Duplex switch
A
24) Cells are connected in parallel to increase the ________ capacity of the cells. a. current b. voltage c. resistance d. inductance
B
25) The resistors are to be connected in four possible types 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
A
26) Which is an exposed wiring method that uses cleats, knowbs, tubes and flexible tubing for the protection and support of single insulated conductor run in or on building and not concealed by the building structure? a. Open wiring on insulators b. Armored cable wiring c. Concealed knob and tube wiring d. Metal clad cable wiring
C
27) What will happen if two 100-W, 230 V incadescent lamps are connected in series across a 230 V source? a. Both lamps will consume more power. b. Both lamps will get burnt. c. Each lamp will give lesser output lights. d. Each lamp will give more output lights.
D
28) What is the reason why electrical appliances are connected in parallel rather than in series? a. Parallel connection consumes lesser power. b. Parallel connection is simpler than series connection. c. Each appliances consumes more power if connected in series. d. It makes the operation of each appliance independent of each other.
A
29) When replacing a busted fuse which of the following is important? a. same size and type b. same type but different rating c. same size but different rating d. different size and type
A
3) A part of an electric circuit which converts electrical energy into another form of energy to do work is ________. a. load b. circuit c. source d. control
D
30) Which of the following is a source of alternating current? a. Dynamo b. Battery c. Dry cell d. Alternator
D
31) When there is a break in the circuit and the current could not pass through, the circuit is ________. a. closed b. shorted c. grounded d. open
A
32) Which term usually refers to a device that produces an electric current when light falls upon them? a. Solar cell b. Dry cell c. Solar lamp d. Solar light
C
33) Which is synchronous alternating-current machine that changes mechanical power into electrical power? a. Dynamo b. Motor c. Alternator d. Lathe machine
C
34) Which battery CANNOT be recharged after its chemical energy has been depleted? a. Energizer b. Eveready c. Primary battery d. Secondary battery
B
35) Which generator generates direct current? a. Alternator b. Dynamo c. Battery d. Adaptor
D
36) Which battery can be recharged after each chemical energy has been depleted? a. Primary battery b. Energizer c. Eveready d. Secondary battery
D
37) Which is used to change mechanical energy into electrical energy? a. Battery b. Circuit c. Dry cell d. Generator
C
4) A part of an electrical circuit, consists of batteries, generator or a main electrical power which supplies electricity is called ________. a. control b. load c. source d. voltage
D
40) Which transforms heat energy to electric energy? a. Transformers b. Battery c. Generator d. Thermocouple
B
41) Which is the kinetic energy of falling water? a. Thermo energy b. Hydro energy c. Solar energy d. Mechanical energy
B
42) Which is a solar collector that is capable of producing voltage when exposed to radiant energy (sunlight)? a. Photoelectric b. Photovoltaic system c. Photoemission system d. Solar light
B
43) Energy derived or extracted from the internal heat of the earth is called ________. a. volcanic b. geothermal c. thermal d. chemical
A
44) Which refers to the extraction of electrons from a substance by sunlight on incident electromagnetic radiation? a. Photoelectric effect b. Photovoltaic effect c. Photoemission d. Electron microscopy
B
45) Which statement is TRUE? a. Bigger size of wire has higher resistance. b. Bigger size of wire has lower resistance. c. Long wire has lesser resistance. d. Short wire has higher resistance.
C
46) A small light ulb with a resistance of 100 ohms is connected across a 120-v line. What is the current through the bulb? a. 1.2 A b. 0.012 A c. 0.12 A d. 12 A
A
47) A 200-v lamp has a resistance of 400 ohms. The power rating in watts of lamp is ________. a. 100 w b. 600 w c. 200 w d. 250 w
B
48) If 18 resistances, each of a value of 36 ohms, are connected in parallel, then the total resistance is ________. a. 36 ohms b. 2 ohms c. 648 ohms d. 54 ohms
C
49) A toaster takes 10 A from a 120v line. The power used is: a. 12 w b. 130 w c. 1,200 w d. 120 w
D
5) A law that states that current is directly proportional to voltage and inversely proportional to resistance is known as ________. a. PEC b. Law of Resistivity c. Kirchoff's Law d. Ohm's Law
A
50) What is the resistance of a 100 w, 110-v incandescent lamp? a. 121 ohms b. 115 ohms c. 125 ohms d. 12.1 ohms
D
51) How many kilowatts is the water heater if it draws a current of 10 amperes and has a resistance of 23 ohms? a. 23 Kw b. 2,300 Kw c. 230 Kw d. 2.3 Kw
B
52) The resistance of an electrical wire is inversely proportional to its ________. a. length b. cross sectional area c. temperature d. material
B
53) A fluorescent lamp unit connected to a 110v AC line takes 1.2A and requires 110w power. What is its power factor? a. 0.9 b. 0.833 c. 0.866 d. 0.8
C
54) An electric heater uses 20kw-in 8 hours. If the voltage across the heater is 240 volts. What is the heater resistance? a. 2.5 ohms b. 83.3 ohms c. 23.04 ohms d. 2.30 ohms
B
55) The resistance of a 230v incandescent lamp is 300 ohms. What current is required to operate the lamp? a. 0.85 A b. 0.77 A c. 1.30 A d. 7.74 A
A
56) A group of lamps operates a current of 12 A and a voltage of 120v. What is the total power of the lamps? a. 1.44 kw b. 1.20 kw c. 1.34 kw d. 14.4 kw
C
57) What is the maximum load capacity of a 15A circuit breaker protecting a branch circuit that supplies a continuous load? a. 15 A b. 10 A c. 12 A d. 14 A
B
58) What is the horsepower rating of an electric water pump if it has a power rating of 1.75 Kw? a. 2 Hp b. 2.3 Hp c. 2.5 Hp d. 23 Hp
C
59) How many kilowatts does a certain appliance consume for 5 hours of useif it has a power rating of 1.5 Hp? a. 56 Kw b. 7.5 Kw c. 5.6 Kw d. 75 Kw
A
6) In Ohm's Law, to find the unknown voltage in the circuit, the formula to be used is: a. E = I x R b. E = I / R c. I = E / R d. R = E / I
B
60) A cell supplies a load current of 0.5A for a period of 20 hours until its terminal voltage falls to an unacceptable level. How long can it be expected to supply a current of 100mA? a. 50 hours b. 100 hours c. 60 hours d. 70 hours
B
61) A battery is rated 200Ah. If it is used to supply a constant current of 8Ah. How long can the battery last until it becomes unusable? a. 20 hours b. 2.5 hours c. 15 hours d. 2.5 hours
C
62) The resistance of 500 meters of a certain wire is 125 ohms. What length of the same wire will have a resistance of 60 ohms? a. 24 meters b. 225 meters c. 240 meters d. 235 meters
C
63) If three equal resistances are connected in parallel,the equivalent resistance of the circuit will be ________ the value of one resistor. a. three time b. half c. one-third d. the same
A
64) Find the cost of using a 100W, 220V lamp for 20 hours at P3.00 per kW-hr? a. P6.00 b. P9.00 c. P10.00 d. P60.00
D
65) Which is a box with a blank cover is inserted in one or more runs of raceway to facilitate pulling of the conductors? a. Blank box b. Junction box c. Terminal box d. Pull box
B
66) Which is a box with a blank cover for joining runs of conduits and providing space for connection and branching of enclosed conductors? a. Blank box b. Junction box c. Terminal box d. Pull box
B
67) The minimum size of wire used in electrical wiring is the no.14 AWG. Under the SI standard, what is the diameter of this wire? a. 1.2 mm b. 1.6 mm c. 1.5 mm d. 2.0 mm
D
68) A thin-walled steel raceway of circularwith a corrosion-resistant coating for protection of wires or cable is ________. a. rigid metal conduit b. flexible metal pipe c. metal moulding d. electrical metallic tubing
A
69) Armored cable is commercially known as ________. a. BX cable b. flat cable c. metallic cable d. duplex cable
B
70) Which type of cable is fabricated assembly of insulated conductors enclosed in a flexible metal sheath? a. Underground cable b. Armored cable c. Flat cable d. Flexible cable
B
71) Flat cable assembly shall be installed for ________. I. concealed work only II. exposed work only a. I only b. II only c. I and II d. cannot be determined
B
72) An assembly of two pieces of insulating material provided with grooves for holding one or more conductors at a definite scpacing from the surface wired over and from each other, and with holes for fastening in position is called: a. split knob b. cleat c. spool insulator d. strain insulator
C
73) Which is a wiring method that uses knobs, tubes, and flexible non-metallic tubing for the protection and support of single insulated conductors concealed in hollow spaces of walls and ceilings of buildings? a. Knob and tube wiring b. Open wiring on insulators c. Concealed knob and tube wiring d. Open wiring with knob and tubes
B
74) Which term refers to that switch or outlet body that is embedded or hidden in the wall? a. Surface type b. Flush type c. Concealed type d. Open type
A
75) The use of surface non-metallic raceway is not permitted in all the following, EXCEPT: a. dry locations b. where subject to severe physical damage c. where voltage is over 300 V d. where concealed
B
76) When the entire switch or outlet body is visible and extends beyond the wall surface, the device is said to be ________. a. Wall type b. Surface type c. Flush type d. Open type
C
77) What device automatically breaks the circuit the moment an overload or short circuit occurs? a. Breaker switch b. Overload c. Circuit breaker d. Main switch
D
78) Which term is used when two conductors are embedded in one solid mass of rubber insulation? a. two in one b. three in one c. stranded d. duplex
C
79) What type of socket is used for outdoor or wet location in wiring installation? a. Waterproof socket b. Special purpose socket c. Weatherproof socket d. Outdoor socket
C
8) There are several factors involved in electrical wiring installation but the foremost consideration is ________. a. cost b. labor c. safety d function
A
80) What is the smallest size of wire permitted by the Code to be used in wiring installation? a. 2.0 mm squared b. 3.5 mm squared c. 2.0 mm d. 1.25 mm squared
A
81) Which one of the following uses is permitted by the Code to be used for surface non-metallic raceway? a. dry locations b. where concealed c. where subject to severe physical damage d. where voltage is over 300 V
D
82) Service entrance using copper conductors shall have sufficient capacity and shall not be smaller than ________. a. 5.5 mm squared b. 3.5 mm squared c. 14 mm squared d. 8.0 mm squared
C
83) If two identical lamps give normal light when connected in parallel in a 230v line are reconnected in series in the same line, the bulb will ________. a. give more light b. not light c. give less light d. blows out
B
84) When flexible metal conduit is installed as a fixed raceway, it shall be secured within ________ on each side of every outlet box. a. 250 mm b. 300 mm c. 100 mm d. 150 mm
A
85) A short circuit can be detected by using ________. a. an ohmmeter b. a megger c. an oscilloscope d. an ammeter
A
86) The electrical plans for residential house include the following items, EXCEPT: a. Substation plan b. Location plan c. Floor plan showing location of service d. Layout of wiring plan for general lighting and receptacles outlets
B
87) If installed in raceways, conductors of size ________ and larger shall be stranded. a. 5.5 mm squared b. 8.0 mm squared c. 14 mm squared d. 3.5 mm squared
C
88) At least ________ of free conductor shall be left at each outlet, junction and switch point for splices or connection of fixture or devices. a. 250 mm b. 175 mm c. 150 mm d. 300 mm
D
89) A certain residential house has lighting load of 1.1 kVA and an appliance load of 10A at 220 volts, single phase, two wires, 60 Hz. The branch circuit fuse protection for lighting and appliance loads are ________ and ________, respectively. a. 20 A and 60 A b. 20 A and 30 A c. 15 A and 30 A d. 15 A and 20 A
A
9) The standard number or diameter of wires for convenience outlet layout should be? a. 12 b. 14 c. 18 d. 10
C
90) Live vegetation or trees ________ used for support of overhead conductors spans. a. shall be b. should be c. shall not be d. should not be
D
91) Light fixtures suspended from the ceiling by chains should be wired so that the wires ________. a. will be grounded b. will not touch the chains c. will support the fixture d. will not support the fixture
D
92) In rigid metal conduit wiring, conduit of 15-20 mm diameter shall be supported at least every ________. a. 2,500 mm b. 3,500 mm c. 1,800 mm d. 3,800 mm
A
93) Why do conductors need additional wiring insulators? a. Electrical wiring needs to be protected from mechanical harm. b. Wires are connected by joints therefore need reinsulation. c. Wires touches wood surface therefore need protection. d. Wires skin is weak.
A
94) What is the total number of mechanical degrees that an electrical pipe run maybe bent between pull points? a. 360 degrees b. 180 degrees c. 120 degrees d. 270 degrees
C
95) Rigid non-metallic conduit shall be supported within ________ of each box. a. 600 mm b. 800 mm c. 900 mm d. 760 mm
C
96) Electrical metallic tubing smaller than ________ electrical trade size shall NOT be used. a. 12 mm b. 10 mm c. 15 mm d. 20 mm
B
97) Type AC cable shall be secured by approved staples, straps, hangers or similar fittings at intervals NOT exceeding ________. a. 1,250 mm b. 1,300 mm c. 1,500 mm d. 1,000 mm
C
98) In concealed knob and tube wiring, the clearance to be maintained between conductors is ________. a. 65 mm b. 45 mm c. 76 mm d. 50 mm
D
99) Three bulbs are connected in parallel and controlled by a single switch. If one of the 3 bulbs is busted, what will happen to the remaining bulbs? a. it will not lit b. its brightness is reduced c. its brightness increases d. its brightness in maintained
A
A 200-v lamp has a resistance of 400 ohms. The power rating in watts of lamp is ____. A. 100w B. 600w C. 200w D. 250w
B
A basic electric circuit is made up of what components? B. A load, a resistor, and a conductive path for current B. A voltage source, a load, and a conductive path for current C. A voltage source, a conductive path for current, and a battery C. A conductive path for curent, a battery, and a copper wire
B
A battery is rated 200Ah. If it is used to supply a constant current of 8A, how long can the battery last until it becomes unusable? A. 20 hrs B. 25 hrs C. 15 hrs D. 2.5 hrs
B
A cell supplies a load current of 0.5A for a period 20hrs until its terminal voltage falls to an unacceptable level. How long can it br expected to supply a current of 100mA? A. 50 hrs B. 100 hrs C. 60 hrs D. 70 hrs
D
A certain residential house has lighting load of 1.1 kVA and an appliance load of 10A at 220 volts, single phase, two wires, 60Hz. The brach circuit fuse protection for lighting and appliance loads are ______ and _______, respectively. A. 20A and 60A B. 20 and 30 C. 15A and 30A D. 15A and 20A
A
A complete circuit consists of a device or board, a path for the current flow, a method of control and a source of A. Electrical energy B. Electrical machine C. Electrical device D. Electrical charge
B
A device for producing electric current by moving a coil of wire in magnetic field A. Motor B. Generators C. Machine D. Engine
D
A device that protects the conductor from burning the insulator A. Switch B. Electric tape C. Bulb D. Fuse
C
A flourescent lamp unit connected to a 110v AC line takes 1.2A and requires 110w power. What is its power factor? A. 0.9 B. 0.833 C. 0.866 D. 0.8
D
A form of electricity where the flow of current is always in the same direction ____. A. Voltage B. Power C. Alternating current D. Direct current
C
A group of lamps operates a current of 12A and a voltage of 120v. What is the total power of the lamps? A. 1.44 kw B. 1.20 kw C. 1.34 D. 14.4
D
A law that states that current is directly proportional to voltage and inversely proportional to resistance is known as ______. A. PEC B. Law of resistivity C. Kirchoff's law D. Ohm's law
D
A parallel circuit differs from a series circuit in that a parallel circuit has A. No path for current flow B. Fewer paths for current flow C. One path for current flow D. More than one path for current flow
D
A parallel circuit is also used as a divider for: A. Conductance B. Power C. Voltage D. Current
A
A part of an electric circuit which converts electrical energy into another form of energy to do work A. Load B. Circuit C. Source D. Control
C
A part of an electrical circuit, consist of batteries, generator or a main electrical power which supplies energy A. Control B. Load C. Source D. Voltage
A
A process in joining hydrogen atoms which causes heat hotter than the sun is called ____. A. Fusion B. Fission C. Friction D. Tension
B
A process in splitting the atom of uranium is called___. A. Fusion B. Fission C. Friction D. Tension
A
A series circuit current is: A. Remains the same through each component B. The same as the individual resistances C. Subtracted by each component D. Varies through each component
B
A series connected dry cells will result to______. A. Increase in the amount of current B. Increase in the amount of voltage C. Increase total resistance D. More powerful supply of electricity
A
A short circuit can be detected by using ____. A. An ohmmeter B. A megger C. An oscilloscope D. An ammeter
B
A short circuit will have A. A small current flow B. A large current flow C. No current flow D. Some current flow
C
A small light bulb with a resistance of 100 ohms is connected across a 120-v line. What is the current through the bulb? A. 1.2 A B. 0.012 A C. 0.12 A D. 12 A
D
A switch is a device that: A. Has a short circuits complex circuits B. Hold a fuse C. Has a double polr D. Completes a current path
D
A thin-walled steel raceway of circular form with a corrosion-resistant coating for protection of wires or cables is ____. A. Rigid metal conduit B. Flexible metal pipe C. Metal moulding D. Electrical metallic tubing
C
A toaster takes 10A from a 120v line. The power used is ___. A. 12 w B. 130 w C. 1200 w D. 120 w
B
A watt-hour meter is used by a utility company like Meralco, to determine your electric bill. The watt-meter record the A. Current B. Electrical power consumption C. Electrical energy consumption D. Voltage
C
All the components in a series circuit schematic is recognized because: A. Diagonally across the page B. In a uniform vertical manner C. End to end in a "string" D. Horizontally across the page
A
Armored cable is commercially known as ____. A. BX cable B. Flat cable C. Metallic cable D. Duplex cable
C
An ammeter is used to measure A. Voltage B. Resistance C. Current D. All of the above
B
An assembly of 2 pieces of insulating material provided with grooves for holding one or more conductors at a definite spacing from the surface wired over and from each other, and with holes for fastening in position is called _____. A. Split knob B. Cleat C. Spool insulator D. Strain insulator
B
An electric heater uses 20kw-h in 8 hrs. If the voltage across the heater is 240 volts. What is the heater resistance? A. 2.5 ohms B. 83.3 ohms C. 23.04 ohms D. 2.30 ohms
B
An electrical component used to control electrical circuit in two different locations. A. 4-way switch B. 3-way switch C. Push-button switch D. Remote controlled switch
D
An open resistor can affect a series circuit in: A. Current will flow around the open resistor B. The open resistor will drop 0 V. C. Total resistance will decrease D. No current will flow in the circuit
C
At least ____ of free conductor shall be left at each outlet, junction, and switch point for splices or connection of fixture or devices A. 250mm B. 175mm C. 150mm D. 300 mm
A
Cells are connected in parallel to increase the ______capacity of the cells. A. Curent B. Voltage C. Resistance D. Inductance
C
Chemical reaction takes place before it produces electrical charges to what source of electricity? A. Geothermal power B. Solar power C. Battery D. Rotary electromagnetic machine
A
Circuit breakers are used to protect household electrical circuits. What is the ampacity rating of the breaker used for convenience outlets or general purpose circuits? A. 20 amperes B. 30 amperes C. 15 amperes D. 60 amperes
A
Components that connect in parallel form: A. Branches B. Short circuits C. Open circuits D. A voltage divider
C
Electrical metallic tubing smaller than _____ electrical trade size shall NOT be used. A. 12 mm B. 10 mm C. 15 mm D. 20 mm
C
Electrical power is measured in A. Amperes B. Ohms C. Watts D. Volts
A
Electricity is known by its effect. Which of the following is not true? A. Use candle to light your house B. Electric fan to ventilate air C. Electric stove for cooking D. Conditioner to regulate temperature
B
Energy derived or extracted from the internal heat of the earth is called _____ energy. A. Volcanic B. Geothermal C. Thermal D. Chemical
B
Energy derived or extracted from the internal heat of the earth is called ______ energy. A. Volcanic B. Geothermal C. Photoemission system D. Solar light
A
Find the cost of using 100W, 220V, lamp for 20hrs at Php 3.00 per kW-hr. A. Php 6.00 B. Php 9.00 C. Php 10.00 D. Php. 60.00
B
Flat cable assembly shall be installed for _____. I. Concealed work only II. Exposed work only A. I only B. II only C. I and II D. Cannot be determined
D
House wiring must follow to existing laws and regulations of the National Electrical Code as well as the City or Local ordinances enforced and applied to the specific localities. What agency approves its methods A. City Engineers B. Barangay office C. Department of Local Government D. National Fire Protection
B
How does battery delivers current when it is connected to a series? A. Primary/Secondary difference B. Total Resistance C. The polarity connections D. Average resistance
C
How many kilowatts does a certain appliance consume for 5hrs. of use if it has a power rating of 1.5Hp? A. 56Kw B. 7.5 Kw C. 5.6 Kw D. 75 Kw
D
How many kilowatts is the water heater if it draws a current of 10 amperes and has a resistance of 23 ohms? A. 23 Kw B. 2300 Kw C. 230 Kw D. 2.3 Kw
B
If 18 resistance, each of a value of 36 ohms, are connected in parallel, then the total resistance is ______. A. 36 ohms B. 2 ohms C. 648 ohms D. 54 ohms
C
If 3 equal resistances are connected in parallel, the equivalent resistance of the circuit will be _____ the value one resistor. A. Three times B. Half C. One-third D. The same
B
If installed in raceways, conductors of size______ and larger shall be stranded A. 5.5 mm^2 B. 8.0 mm^2 C. 14 mm^2 D. 3.5 mm^2
D
If the current in a circuit equals 0 A, it is expected that the: A. Voltage is too high B. Resistance is too low C. Circuit has a short D. Circuit is open
C
If two identical lamps give normal light when connected in parallel in a 230 V line are reconnected in series in the same line, the bulb will ______. A. Give more loght B. Not light C. Give less light D. Blows out
B
If you measure the resistance (R) through a component, and the voltage (V) across the component, then you can find the resistance of the component by using the equation A. R= V x I B. R= V/I C. V= I x R D. R= 1/V
A
If you want to check if there is a current present in the electrical circuit. In what particular part of the electrical circuit srves as the conductor and passage of the electric current from the souceand back will he check? A. Path B. Source C. Load D. Control
B
In a 220-volt power line, three 50-watt incandescent bulbs are connected in parallel. How many more bulbs will light if one of the bulbs is open? A. One B. Two C. All D. None
A
In a simple electrical connection, one of the lines of the source is connected to ________. A. Terminal 1 of the load B. Terminal 2 of the load C. Terminal 1 of the switch D. Terminal 1 and 2 of the switch
C
In concealed knob and tube wiring, the clearance to be maintained between conductors is _____. A. 65 mm B. 45 mm C. 76 mm D. 50 mm
A
In ohm's law, to find the unknown voltage in the circuit, the formula to be used is _____. A. E= I x R B. E= I/R C. I= E/R D. R= E/I
D
In rigid metak conduit wiring, conduit of 15-20 mm diameter shall be supported at least every ___0 A. 2500 mm B. 3500 mm C. 1800 mm D. 3000 mm
D
It is a natural source of electricity that makes use of the heat of the sun to produce electricity A. Hydroelectric electricity B. Human energy C. Nuclear energy D. Solar energy
B
It is a type of electricity in motion. This is very useful; it can be transmitted from place to place through a connection and attachment A. Static electricity B. Dynamic electricity C. Battery D. Dynamic and Static electricity
C
It is an electrical device or appliances that consumes electrical energy A. Path B. Source C. Load D. Control
C
It is form of mass coming from biological non-fossil organic matter A. Fossil fuel B. Geothermal C. Biomass D. Solar Mass
A
It is stated in Ohms Law that current is directly proportional to the electromotive force (E. M. F) or voltage and inversely proportional to the A. Resistance B. Power C. Source D. Electricity
A
John wants to check if there is a current present in the electrical circuit. In what particular part of the electrical circuit serves as the conductor and passage of the electric current from the source and back will he check? A. Path B. Source C. Load D. Control
D
Light fixtures suspended from the ceiling by chains should be wired so that the wires _______. A. Will be grounded B. Will not touch the chains C. Will support the fixture D. Will support the fixture
C
Live vegetation or trees _____ used for support of overhead conductors spans. A. Shall be B. Should be C. Shall not be D. Should not be
C
Open wiring on insulators which is mostly known as open or exposed wiring method uses cleats, knobs (solid or split) that made of what kind of material? A. Wood B. Ceramics C. Porcelain tubes D. Rubber
A
Peter is checking the circuit of an electrical system. What unit of measure will he use if he wants to know the resistance in a circuit? A. Ohms B. Volts C. Amperes D. Watts
A
Planning and designing of electrical wiring plan is being done in order to ____. A. Provide efficient and effective wiring system of the building B. Maintain quality and workmanship C. Avoid overloaded circuit D. Protect the circuit from high current
A
Power is defined as: A. The rate at which work is done B. Work C. The conversion of energy D. Force
C
Rigid non-metallic conduit shall be supported within _____ of each box or other conduit termination A. 600 mm B. 800 mm C. 900 mm D. 760 mm
D
Service entrance using copper conductors shall have sufficient capacity and shall not be smaller than ___. A. 5.5 mm^2 B. 3.5 mm^2 C. 14 mm^2 D. 8.0 mm^2
A
The electric plans for residential house include the following items EXCEPT one. Which one is this? A. Substation plan B. Location plan C. Floor plan showing location of service D. Layout of wiring plan for general lighting and receptacle outlets
D
The flow of electric charge is known as: A. Voltage drop B. Resistance C. Charging D. Electric current
B
The force which opposes and reduces the flow of electrical current is recognized as ______. A. Power B. Resistance C. Electromagnetism D. Frequency
B
The lightning you see during storms and heavy rains is generated by friction from the bombardment of heavy clouds is an example of A. Dynamic electricity B. Static electricity C. Generate electricity D. Dynamic and static electricity
B
The minimum size of wire used in electrical wiring is the no. 14 AWG. Under the SI standard, what is the diameter of this wire? A. 1.2 mm B. 1.6 mm C. 1.5 mm D. 2.0 mm
B
The negative and positive charge symbols are assigned to the: A. Proton and electron B. Electron and proton C. Atom and nucleus D. Electron and element
C
The periodic reversal of the current in a circuit is known as: A. Pulsating current B. Variable current C. Alternating current D. Direct current
C
The resistance of 500 meters of a certain wire is 125 ohms. What length of the same wire will hava a resistance of 60 ohms? A. 24 meters B. 225 meters C. 240 meters D. 235 meters
A
The resistance of a 230v incandescent lamp is 300 ohms. What current is required to operate the lamp? A. 0.85 A B. 0.77 A C. 1.30 A D. 7.74 A
B
The resistance of an electrical wire is inversely proportional to its _____. A. Length B. Cross sectional area C. Temperature D. Material
B
The resistors are to be connected in four possible types 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
D
The size of electrical wire recommended for installing lighting fixtures. A. No. 12 AWG B. No. 10 AWG C. No. 18 AWG D. No. 14 AWG
A
The use of surface non-metallic raceway is not permitted in all the following EXCEPT one. Which is the exception? A. Dry locations B. Where subject to severe physical damage C. Where voltage is over 300V D. Where concealed
A
The standard number or diameter or wires for convenience outlet layout should be. A. No. 12 B. No. 14 C. No. 18 D. No. 10
C
There are several factors involved in electrical wiring installation but the foremost consideration is ____. A. Cost B. Labor C. Safety D. Function
D
Three bulbs are connected in parallel and controlled by a single switch. If one of the 3 bulbs is busted, what will happen to the remaining bulbs? A. Will not lit B. Its brightness is reduced C. Its brightness increases D. Its brightness is maintained
D
To comply with the requirements of the Philippine Ethical Code the appropriate fuse rating for lighting outlet should be _____. A. 15 amperes B. 30 amperes C. 60 amperes D. 20 amperes
C
To conserve energy, what kind of lamp be used in lighting fixtures? A. Incandescent lamp B. Mercury lamp C. Compact flourescent lamo D. Neon lamp
B
Type AC cable shall not be secured by approved staples, straos hangers or similar fittings at intervals NOT exceeding________. A. 1250 mm B. 1300 mm C. 1500 mm D. 1000 mm
B
What amount of current does a 40-watt flourescent lamp draw from a 220 volts power source? A. 5.5 Amperes B. 0.18 amperes C. 25.5 amperes D. 50.5 amperes
B
What amount of current does a 40-watt fluorescent lamp draw from a 220 volts power source? a. 5.5 amperes b. 0.18 amperes c. 25.5 amperes d. 50.5 amperes
A
What are the unit and symbol for current? A. Ampere, I B. Ampere, A C. Ampere, E D. Ampere, M
C
What device automatically breaks the circuit the moment an overload or short circuit occurs? A. Breaker switch B. Overload C. Circuit breaker D. Main switch
B
What instrument is used in checking electrical that has dual functions? A. Watt meter B. Multi-Tester C. Ohmmeter D. Volt meter
A
What is RT for a 12 k ohms, a 4 k ohms, and a 3 k ohms resistor in parallel? A. 1.5 k ohms B. 6.3 k ohms C. 2 k ohms D. 19 k ohms
B
What is RT for a 3 k ohms, a 6 k ohms, and a 9 k ohms resistor in series? A. 12 ohms B. 18 ohms C. 3 ohms D. 15 ohms
B
What is the horsepower rating of an electric water pump if it has a power rating of 1.75 kw? A. 2 Hp B. 2.3 Hp C. 2.5 Hp D. 23 Hp
C
What is the maximum load capacity of a 15A circuit breaker protecting a branch circuit that supplies a continuous load? A. 15A B. 10A C. 12A D. 14A
A
What is the resistance of a 100w, 110v incandescent lamp? A. 121 ohms B. 115 ohms C. 125 ohms D. 12.1 ohms
A
What is the smallest size of wire permitted by the Code to be used in wiring installation? A. 2.0 mm^2 B. 3.5 mm^2 C. 2.0 mm^2 D. 1.25 mm^2
A
What is the total number of mechanical degrees that an electrical pipe maybe bent between pull points? A. 360 degrees B. 180 degrees C. 120 degrees D 270 degrees
B
What is the voltage of a circuit if the current 3A and the resistance 5? A. 15A B. 15V C. 1.2 D. Control
D
What is the voltage required by an automatic pressure cooker having a resistance of 20 ohms when the current flowing is 8 amperes A. 240 volts B. 480 volts C. 120 volts D. 160 volts
D
What is thr main reason why electrical appliances are connected in parallel rather than in series? A. Parallel connection consumes lesser power B. Parallel connection is simpler than series connection C. Each appliance consumes more power if connected in series D. It makes the operation of each appliance independent of each other
C
What type of socket is used for outdoor or wet location wiring insullation? A. Water proof socket B. Special purpose socket C. Weatherproof socket D. Outdoor socket
D
What type of switch is used to control alternately three-phase line system using two sources of power? A. Double Pole Single Throw Switch B. Single Pole Double Throw Switch C. Triple Pole Single Throw Switch D. Triple Pole Double Throw Switch
A
What type of switch is used when you wnat to control one lanp or group of lanp in two different locations? A. Two, 3-way switch B. One, 4-way switch C. Two, single switch D. Duplex switch
C
What will happen if two 100-W, 230 V incandescent lamps are connected in series across a 230 V source? A. Both lamps will consume more power B. Both lamps will get burnt C. Each lamp will get lesser output lights D. Each lamp will give more output lights
C
When do we use a voltmeter? A. To measure current B. In series with the circuit C. In parallel with the circuit D. To measure coulombs
B
When flexible metal conduit is installed as a fixed raceway, it shall be secured within _____ on each side of every outlet box A. 250 mm B. 300 mm C. 100 mm D. 150 mm
A
When replacing a busted fuse which of the following is important? A. Same size and type B. Same type but different rating C. Same size but different rating D. Different size and type
A
When replacing a busted fuse which which of the following is important? A. Same size and stype B. Same type but different rating C. Same size but different rating D. Different size and type
B
When the entire switch or outlet body is visible and extends beyond the wall surface, the device is said to be ____. A. Wall type B. Surface type C. Flush type D. Open type
D
When there is a break in the circuit and the current could not pass through, the circuit is _____. A. Closed B. Shorted C. Grounded D. Open
C
Which battery CANNIT be recharged after after its chemical energy has been depleted? A. Energizer B. Eveready C. Primary battery D. Secondary battery
D
Which battery can be recharged after each chemical energy has been depleted A. Primary battery B. Energizer C. Eveready D. Secondary battery
D
Which box with a blank cover is inserted in one or more runs of raceway to facilitate pulling of the conductors? A. Blank box B. Junctiom box C. Terminal box D. Pull box
D
Which equation shows individual resistor drop? A. V x R B. 1^2 x R C. V x I D. 1 x R
B
Which generator generates direct current? A. Alternator B. Dynami C. Battery D. Adaptor
B
Which is a box with a blank cover for joining runs of conduits and providing space for connection and branching of enclosed conductors? A. Blank box B. Junction box C. Terminal box D. Pull box
B
Which is a solar collector that is capablr of producing voltage when exposed to radiant energy (sunlight)? A. Photoelectric B. Photovoltaic system C. Photoemission system D. Solar light
C
Which is a synchronous alternating-current machine that changes mecganical power into electrical power? A. Dynamo B. Motor C. Alternator D. Lathe machine
A
Which is an exposed wiring method that uses cleats, knobs, tubes, and flexible tubing for the protection and support of single insulated conductor run in or on building and not concealed by the building structure? A. Open wiring on insulators B. Armored cable wiring C. Concealed knob and tube wiring D. Metal clad cable wiring
B
Which is the kinetic energy of falling water? A. Thermo energy B. Hydro energy C. Solar energy D. Mechanical energy
D
Which is used to change mechanical energy into electrical energy? A. Battery B. Circuit C. Dry cell D. Generator
A
Which of the following electrical symbols in wiring diagran means that there are 3 wires running in a line? A. - - - - /-/-/---- B. - - - - - /-/-/-/----- C. - - - - - - - - - - - D. S3W
D
Which of the following is a source of alternating curent? A. Dynamo B. Battery C. Dry cell D. Alternator
B
Which of the following is not a safety precaution in electricity? A. Use proper tools for the job. B. Touch the electrical wiring C. Wear safety gloves D. Protect cord from heat
C
Which of the following is the best conductor of electricity? A. Copper B. Aluminum C. Silver D. Gold
A
Which refers to the extraction of electrons from a substance by sunlight on incident electromagnetic radiation? A. Photoelectric effect B. Photovoltaic effect C. Photoemission D. Electron microscopy
B
Which statement is TRUE? A. Bigger size of wire has higher resistance B. Bigger size of wire has lower resistance C. Long wire has lesser resistance D. Short wire has higher resistance
D
Which term is used when 2 conductors are imbedded in one solid mass of rubber insulation? A. Two in one B. Duplex C. Stranded D. Duplex
B
Which term refers to that switch or outlet body that is embedded or hidden in the wall? A. Surface B. Flush type C. Concealed type D. Open type
A
Which term usually refers to a device that produces an electric current when light falls upon them? A. Solar cell B. Dry cell C. Solar lamp D. Solar light
D
Which transforms heat energy to electric energy? A. Transformer B. Battery C. Generator D. Thermocouple
A
Which type of the following uses is permitted by the Code to he used for surface non-metallic raceway? A. Dry location B. When concealed C. Where subject to physical change D. Where voltave is over 300 V
A
Why do conductors need additional wiring insulators? A. Electrical wiring needs to be protected from mechanical harm B. Wires are connected by joints therefore needs reinsulation C. Wires touches wood surface therefore need protectio D. Wires skin is weak