4th Class Power Engineering Part 4A
Unit 12 Electro Technology Chapters
1-6 Exam Questions And Answers
/.__________ The unit of current flow is the
Select one:
a. volt
b. ampere
c. watt
d. hertz
e. ohm
/.__________ is an electromotive force.
Select one:
a. Amperage
b. The volt
c. The watt
d. The ohm
e. Power
/.__________ current flow is from positive to negative.
Select one:
a. Conventional
b. Reversed
c. Static
d. Electron
e. Generated
/.An electrical device which is designed to start and stop current flow is the
Select one:
a. switch
b. fuse
c. resistor
d. circuit breaker
e. potentiometer
/.A closed electrical circuit will:
Select one:
a. be series only
b. be parallel only
c. not allow current to flow
,d. allow current to flow
e. contain an open switch or relay contact
/.Equivalent resistance is decreased:
Select one:
a. when a circuit is in series
b. if the amperage is increased
c. when voltage is decreased
d. when a circuit is in parallel
e. when a circuit is opened
/.If the applied voltage in a circuit is 220 volts and the current flow is 2.3 amperes the
resistance of this circuit is
Select one:
a. 360 Ohms
b. 25 Watts
c. 95.6 Ohms
d. .025 Ohms
e. 40 Watts
/.The electrical pressure that causes current flow through a circuit is
Select one:
a. electromotive force
b. very high voltage
c. the ohm
d. the watt
e. amperage
/.An electric motor develops 420 kW power output. The motor efficiency is 65%. If the
supply voltage is 2.4 kV, determine the current draw of the motor in ampere.
Select one:
a. 261.38
b. 255.17
c. 273.07
d. 269.23
e. 276.18
/.Ohms Law can be stated as:
Select one:
a. watts times ohms equals volts
b. I = R/E
c. R = I/E
d. E = IR
e. volts equals ohms divided by amperes
,/.Four resistances are connected in parallel. R1 = 6 O, R2 = 16 O, R3 = 30 O, R4 = 52
O. Calculate the total resistance R in O.
Select one:
a. 4.273
b. 3.549
c. 3.867
d. 3.136
e. 2.917
/.A resistor of 9 O is connected to a supply of 120 volts. Determine the power dissipated
by the resistor in watts.
Select one:
a. 1800
b. 1300
c. 1600
d. 1100
e. 1200
/.Four resistances are connected in parallel. R1 = 2 ohms, R2 = 18 ohms, R3 = 40
ohms, R4 = 86 ohms. Calculate the total resistance R in ohms.
Select one:
a. 1.689
b. 1.208
c. 1.849
d. 1.465
e. 1.342
/.A current of 2 amps is flowing through a resistor with a value of 45 ohms. Determine
the value of the applied voltage in volts.
Select one:
a. 2
b. 90
c. 45
d. 180
e. 22.5
/.The watt is an electrical unit of measure for:
Select one:
a. magnetic flux strength
b. resistance
c. potential difference
d. current flow
e. power
/.The unit for opposition to current flow is the:
Select one:
, a. ohm
b. ampere
c. volt
d. newton
e. watt
/.If the power dissipated by a resistor is 1.2 kW when supplied with 110 volts, the
amperage will be:
Select one:
a. 1320
b. 91.666
c. 10.909
d. 132
e. 19.006
/.What power is dissipated by a resistor with a supply voltage of 120 volts, and current
of 8 amperes?
Select one:
a. 96 kilowatts
b. 960 watts
c. 960 ohms
d. 15 watts
e. 15 ohms
/.Three resistances of 15, 34, and 62 ohms make up a series circuit. Supply voltage is
240. The current flowing would be
Select one:
a. 20.38 amps
b. 8.42 amps
c. 2.16 amps
d. 60 amps
e. 5.18 amps
/.The flow of electrons in a uniform direction from atom to atom through a circuit, is
known as:
Select one:
a. current
b. electromotive force
c. voltage drop
d. potential difference
e. a short circuit
/.Commutation is the process of converting AC to _____ in a DC generator.
Select one:
a. Voltage
b. Heat
Unit 12 Electro Technology Chapters
1-6 Exam Questions And Answers
/.__________ The unit of current flow is the
Select one:
a. volt
b. ampere
c. watt
d. hertz
e. ohm
/.__________ is an electromotive force.
Select one:
a. Amperage
b. The volt
c. The watt
d. The ohm
e. Power
/.__________ current flow is from positive to negative.
Select one:
a. Conventional
b. Reversed
c. Static
d. Electron
e. Generated
/.An electrical device which is designed to start and stop current flow is the
Select one:
a. switch
b. fuse
c. resistor
d. circuit breaker
e. potentiometer
/.A closed electrical circuit will:
Select one:
a. be series only
b. be parallel only
c. not allow current to flow
,d. allow current to flow
e. contain an open switch or relay contact
/.Equivalent resistance is decreased:
Select one:
a. when a circuit is in series
b. if the amperage is increased
c. when voltage is decreased
d. when a circuit is in parallel
e. when a circuit is opened
/.If the applied voltage in a circuit is 220 volts and the current flow is 2.3 amperes the
resistance of this circuit is
Select one:
a. 360 Ohms
b. 25 Watts
c. 95.6 Ohms
d. .025 Ohms
e. 40 Watts
/.The electrical pressure that causes current flow through a circuit is
Select one:
a. electromotive force
b. very high voltage
c. the ohm
d. the watt
e. amperage
/.An electric motor develops 420 kW power output. The motor efficiency is 65%. If the
supply voltage is 2.4 kV, determine the current draw of the motor in ampere.
Select one:
a. 261.38
b. 255.17
c. 273.07
d. 269.23
e. 276.18
/.Ohms Law can be stated as:
Select one:
a. watts times ohms equals volts
b. I = R/E
c. R = I/E
d. E = IR
e. volts equals ohms divided by amperes
,/.Four resistances are connected in parallel. R1 = 6 O, R2 = 16 O, R3 = 30 O, R4 = 52
O. Calculate the total resistance R in O.
Select one:
a. 4.273
b. 3.549
c. 3.867
d. 3.136
e. 2.917
/.A resistor of 9 O is connected to a supply of 120 volts. Determine the power dissipated
by the resistor in watts.
Select one:
a. 1800
b. 1300
c. 1600
d. 1100
e. 1200
/.Four resistances are connected in parallel. R1 = 2 ohms, R2 = 18 ohms, R3 = 40
ohms, R4 = 86 ohms. Calculate the total resistance R in ohms.
Select one:
a. 1.689
b. 1.208
c. 1.849
d. 1.465
e. 1.342
/.A current of 2 amps is flowing through a resistor with a value of 45 ohms. Determine
the value of the applied voltage in volts.
Select one:
a. 2
b. 90
c. 45
d. 180
e. 22.5
/.The watt is an electrical unit of measure for:
Select one:
a. magnetic flux strength
b. resistance
c. potential difference
d. current flow
e. power
/.The unit for opposition to current flow is the:
Select one:
, a. ohm
b. ampere
c. volt
d. newton
e. watt
/.If the power dissipated by a resistor is 1.2 kW when supplied with 110 volts, the
amperage will be:
Select one:
a. 1320
b. 91.666
c. 10.909
d. 132
e. 19.006
/.What power is dissipated by a resistor with a supply voltage of 120 volts, and current
of 8 amperes?
Select one:
a. 96 kilowatts
b. 960 watts
c. 960 ohms
d. 15 watts
e. 15 ohms
/.Three resistances of 15, 34, and 62 ohms make up a series circuit. Supply voltage is
240. The current flowing would be
Select one:
a. 20.38 amps
b. 8.42 amps
c. 2.16 amps
d. 60 amps
e. 5.18 amps
/.The flow of electrons in a uniform direction from atom to atom through a circuit, is
known as:
Select one:
a. current
b. electromotive force
c. voltage drop
d. potential difference
e. a short circuit
/.Commutation is the process of converting AC to _____ in a DC generator.
Select one:
a. Voltage
b. Heat
