NEW
Font size
WorksheetsBasic Electricity
Total questions: 30
Worksheet time: 18mins
When there is a break in the circuit and the current could not pass through, the circuit is ________.
closed
shorted
grounded
open
Which term usually refers to a device that produces an electric current when light falls upon them?
Solar cell
Dry cell
Solar lamp
Solar light
Which is synchronous alternating-current machine that changes mechanical power into electrical power?
Dynamo
Motor
Alternator
Lathe machine
Which battery CANNOT be recharged after its chemical energy has been depleted?
Energizer
Eveready
Primary battery
Secondary battery
Which generator generates direct current?
Alternator
Dynamo
Battery
Adaptor
Which battery can be recharged after each chemical energy has been depleted?
Primary battery
Energizer
Eveready
Secondary battery
Which is used to change mechanical energy into electrical energy?
Battery
Circuit
Dry Cell
Generator
A process in splitting the atom of uranium is called ________.
fusion
fission
friction
tension
A process by joining hydrogen atoms which causes heat hotter than the sun is called ________.
fusion
fission
friction
tension
Which transforms heat energy to electric energy?
Transformers
Battery
Generator
Thermocouple
Which is the kinetic energy of falling water?
Thermo energy
Hydro energy
Solar energy
Mechanical energy
Which is a solar collector that is capable of producing voltage when exposed to radiant energy (sunlight)?
Photoelectric
Photovoltaic system
Photoemission system
Solar light
Energy derived or extracted from the internal heat of the earth is called ________.
volcanic
geothermal
thermal
chemical
Which refers to the extraction of electrons from a substance by sunlight on incident electromagnetic radiation?
Photoelectric effect
Photovoltaic effect
Photoemission
Electron microscopy
Which statement is TRUE?
Bigger size of wire has higher resistance.
Bigger size of wire has lower resistance.
Long wire has lesser resistance.
Short wire has higher resistance.
A small light bulb with a resistance of 100 ohms is connected across a 120-v line. What is the current through the bulb?
1.2 A
0.012 A
0.12 A
12 A
A 200-v lamp has a resistance of 400 ohms. The power rating in watts of lamp is ________.
100 W
600 W
200 W
250 W
If 18 resistances, each of a value of 36 ohms, are connected in parallel, then the total resistance is ________.
36 ohms
2 ohms
648 ohms
54 ohms
A toaster takes 10 A from a 120v line. The power used is:
12 W
130 W
1,200 W
120
What is the resistance of a 100 W, 110 V incandescent lamp?
121 ohms
115 ohms
125 ohms
12.1 ohms
How many kilowatts is the water heater if it draws a current of 10 amperes and has a resistance of 23 ohms?
23 kW
2,300 kW
230 kW
2.3 kW
Which is a box with a blank cover is inserted in one or more runs of raceway to facilitate pulling of the conductors?
Blank box
Junction box
Terminal box
Pull box
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?
1.2 mm
1.6 mm
1.5 mm
2 mm
A thin-walled steel raceway of circular with a corrosion-resistant coating for protection of wires or cable is ________.
rigid metal conduit
flexible metal pipe
metal moulding
electrical metallic tubing
Armored cable is commercially known as ________.
BX cable
flat cable
metallic cable
duplex cable
Which type of cable is fabricated assembly of insulated conductors enclosed in a flexible metal sheath?
Underground cable
Armored cable
Flat cable
Flexible cable
An assembly of two 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:
split knob
cleat
spool insulator
strain insulator
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?
Knob and tube wiring
Open wiring on insulators
Concealed knob and tube wiring
Open wiring with knob and tubes
Which term refers to that switch or outlet body that is embedded or hidden in the wall?
Surface type
Flush type
Concealed knob and tube wiring
Open type
The use of surface non-metallic raceway is not permitted in all the following, EXCEPT:
dry locations
where subject to severe physical damage
where voltage is over 300 V
where concealed
