#140.
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
voltage
D
source
Answer: source
#141.
A law that states that current is directly proportional to voltage and inversely proportional to
resistance is known as ________.
A
Ohm's Law
B
Kirchoff's Law
C
Law of Resistivity
D
PEC
Answer: Ohm's Law
#142.
In Ohm's Law, to find the unknown voltage in the circuit, the formula to be used is:
A
E = I / R
B
I = E / R
C
E = I x R
D
R = E / I
Answer: E = I x R
#143.
What amount of current does a 40-watt fluorescent lamp draw from a 220 volts power source?
A
0.18 amperes
B
25.5 amperes
C
50.5 amperes
D
5.5 amperes
Answer: 0.18 amperes
#144.
There are several factors involved in electrical wiring installation but the foremost consideration is
________.
A
safety
B
function
C
labor
D
cost
Answer: safety
#145.
The standard number or diameter of wires for convenience outlet layout should be?
A
12
B
14
C
18
D
16
Answer: 12
#146.
To comply with the requirements of the Philippine Electrical Code, the appropriate fuse rating for
lighting outlet should be ________.
A
20 amperes
B
60 amperes
C
30 amperes
D
15 amperes
Answer: 20 amperes
#147.
Planning and designing of electrical wiring plan is being done in order to:
A
Provide efficient and effective wiring system of the building.
B
Protect the circuit from high current.
C
Avoid overloaded circuit.
D
Maintain quality workmanship.
Answer: Provide efficient and effective wiring system of the building.
#148.
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
Answer: 20 amperes
#149.
An electrical component used to control electrical circuit in two different locations is called:
A
push-button switch
B
remote controlled switch
C
four-way switch
D
three-way switch
Answer: three-way switch
#150.
To conserve energy, what kind of lamp should be used in lighting fixtures?
A
Compact fluorescent lamp
B
Neon lamp
C
Mercury lamp
D
Incandescent lamp
Answer: Compact fluorescent lamp
#151.
The size of electrical wire recommended for installing lighting fixtures is:
A
No. 12 AWG
B
No. 14 AWG
C
No. 18 AWG
D
No. 10 AWG
Answer: No. 14 AWG
#152.
What is the voltage required by an automatic pressure cooker having a resistance of 20 ohms
when the current flowing is 8 amperes?
A
480 volts
B
120 volts
C
160 volts
D
240 volts
Answer: 160 volts
#153.
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
All
B
None
C
One
D
Two
Answer: Two
#154.
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
Answer: Terminal 1 of the load
#155.
Which of the following electrical symbols in wiring diagram means that there are three wires
running in a line?
A
S3W
B
----/-/-/----
C
-----/-/-/-/----
D
------------
Answer: ----/-/-/----
#156.
A series connected dry cells will result to ________.
A
increase in the amount of voltage
B
increase total resistance
C
more powerful supply of electricity
D
increase in the amount of current
Answer: increase in the amount of voltage
#157.
What type of switch is used to control alternately three-phase line system using two sources of
power?
A
Triple Pole Double Throw Switch
B
Triple Pole Single Throw Switch
C
Single Pole Double Throw Switch
D
Double Pole Single Throw Switch
Answer: Triple Pole Double Throw Switch
#158.
Which of the following is the best conductor of electricity?
A
Copper
B
Silver
C
Gold
D
Aluminum
Answer: Silver
#159.
What type of switch is used when you want to control one lamp or group of lamps in two
different locations?