Power Engineering - 4A Electro
Technology Practice Questions With
Complete Solutions
/. An ampere is the _______________ of current flow.
a. measurement
b. cause of increase
c. cause of reduction
d. cause
e. resistance - Answer-✅a. measurement
/.An electrical device which is designed to start and stop current flow is the
a. circuit breaker
b. fuse
c. potentiometer
d. resistor
e. switch - Answer-✅e. switch
/.Equivalent resistance is decreased:
a. when voltage is decreased
b. when a circuit is in parallel
c. if the amperage is increased
d. when a circuit is opened
e. when a circuit is in series - Answer-✅b. when a circuit is in parallel
/.The electrical unit of power is the:
a. joule
b. coulomb
c. watt
d. milliamp
e. watthour - Answer-✅c. watt
/.Most conductors tend to:
a. melt when voltage is applied
,b. oscillate when voltage is applied
c. shrink when heated
d. decrease in resistance with increase in temperature
e. increase in resistance with increase in temperature - Answer-✅e. increase in
resistance with increase in temperature
/.An insulator is material that will not _____________ an electrical current.
a. resist
b. conduct
c. reduce
d. retard
e. slow - Answer-✅b. conduct
/.The opposition a device or material offers to the flow of electric current, is known as:
a. a voltage drop
b. an insulator
c. a resistance
d. a short circuit
e. counterflow - Answer-✅c. a resistance
/.In an equivalent circuit developed from a multi resistor series circuit:
a. original circuit resistances will each have to be the same as the equivalent resistance
b. the sum of voltage drops across the original resistances will be equal to the voltage
drop of the equivalent circuit
c. voltage drop will be the same as for each of the original resistances
d. the resistance will be the reciprocal sum of the original resistances
e. amperage flowing will be different than the original circuit amperage flowing through
each resistance - Answer-✅b. the sum of voltage drops across the original resistances
will be equal to the voltage drop of the equivalent circuit
/.Since the discovery of electrons, it has been determined that electrons are a negative
charge and flow from:
a. north to south
b. negative to positive
c. the battery to the source
d. positive to negative
e. a lower potential to a higher potential - Answer-✅b. negative to positive
/.__________ current flow is from positive to negative.
a. Electron
b. Static
,c. Conventional
d. Generated
e. Reversed - Answer-✅c. Conventional
/.Current flow is inversely proportional to the
a. voltage
b. wattage
c. conductance
d. resistance
e. amperage - Answer-✅d. resistance
/.The unit of current flow is the
a. volt
b. hertz
c. ohm
d. watt
e. ampere - Answer-✅e. ampere
/.The unit for opposition to current flow is the
a. volt
b. newton
c. ohm
d. ampere
e. watt - Answer-✅c. ohm
/.Electrons are negatively charged particles
a. which can easily flow through insulators
b. which seek open circuits
c. firmly attached to the neutrons of an atom
d. orbiting about the nucleus of an atom
e. flowing through the atoms centre - Answer-✅d. orbiting about the nucleus of an atom
/.In an atom the electrons:
a. orbit around the protons only
b. orbit only the neutrons
c. are repelled by the neutrons
d. are large in size when compared to the protons
e. are attracted to the protons - Answer-✅e. are attracted to the protons
/.Atoms that have greater numbers of electrons in the outer shell are
, a. not good insulators
b. positively charged
c. good conductors
d. not good conductors
e. neutrally charged - Answer-✅d. not good conductors
/.The battery of an electrical circuit:
a. gives a load to the circuit
b. supplies electromotive force
c. decreases the resistance
d. withholds neutrons from the circuit
e. maintains lighting for the circuit - Answer-✅b. supplies electromotive force
/.The total resistance of three resistances in a series circuit can be given as:
a. R1 + R2 + R3
b. R1 x R2 x R3
c. R1/1 + R2/2 + R3/3
d. 1/R1 + 1/R2 + R3
e. (R1 x R2 x R3)/3 - Answer-✅a. R1 + R2 + R3
/.__________ is an electromotive force.
a. Power
b. Amperage
c. The ohm
d. The watt
e. The volt - Answer-✅e. The volt
/.Electromotive force
a. is able to move ohms through a resistance
b. is increased by a resistor
c. induces resistance to an open circuit
d. is capable of moving a quantity of electrons at some rate per period of time
e. is increased by a voltage drop - Answer-✅d. is capable of moving a quantity of
electrons at some rate per period of time
/.A current carrying conductor being moved by a magnetic field is the principle known as
a. electrolysis
b. motor action
c. magnetic flux
d. generator action
e. hydro-electrics - Answer-✅b. motor action
Technology Practice Questions With
Complete Solutions
/. An ampere is the _______________ of current flow.
a. measurement
b. cause of increase
c. cause of reduction
d. cause
e. resistance - Answer-✅a. measurement
/.An electrical device which is designed to start and stop current flow is the
a. circuit breaker
b. fuse
c. potentiometer
d. resistor
e. switch - Answer-✅e. switch
/.Equivalent resistance is decreased:
a. when voltage is decreased
b. when a circuit is in parallel
c. if the amperage is increased
d. when a circuit is opened
e. when a circuit is in series - Answer-✅b. when a circuit is in parallel
/.The electrical unit of power is the:
a. joule
b. coulomb
c. watt
d. milliamp
e. watthour - Answer-✅c. watt
/.Most conductors tend to:
a. melt when voltage is applied
,b. oscillate when voltage is applied
c. shrink when heated
d. decrease in resistance with increase in temperature
e. increase in resistance with increase in temperature - Answer-✅e. increase in
resistance with increase in temperature
/.An insulator is material that will not _____________ an electrical current.
a. resist
b. conduct
c. reduce
d. retard
e. slow - Answer-✅b. conduct
/.The opposition a device or material offers to the flow of electric current, is known as:
a. a voltage drop
b. an insulator
c. a resistance
d. a short circuit
e. counterflow - Answer-✅c. a resistance
/.In an equivalent circuit developed from a multi resistor series circuit:
a. original circuit resistances will each have to be the same as the equivalent resistance
b. the sum of voltage drops across the original resistances will be equal to the voltage
drop of the equivalent circuit
c. voltage drop will be the same as for each of the original resistances
d. the resistance will be the reciprocal sum of the original resistances
e. amperage flowing will be different than the original circuit amperage flowing through
each resistance - Answer-✅b. the sum of voltage drops across the original resistances
will be equal to the voltage drop of the equivalent circuit
/.Since the discovery of electrons, it has been determined that electrons are a negative
charge and flow from:
a. north to south
b. negative to positive
c. the battery to the source
d. positive to negative
e. a lower potential to a higher potential - Answer-✅b. negative to positive
/.__________ current flow is from positive to negative.
a. Electron
b. Static
,c. Conventional
d. Generated
e. Reversed - Answer-✅c. Conventional
/.Current flow is inversely proportional to the
a. voltage
b. wattage
c. conductance
d. resistance
e. amperage - Answer-✅d. resistance
/.The unit of current flow is the
a. volt
b. hertz
c. ohm
d. watt
e. ampere - Answer-✅e. ampere
/.The unit for opposition to current flow is the
a. volt
b. newton
c. ohm
d. ampere
e. watt - Answer-✅c. ohm
/.Electrons are negatively charged particles
a. which can easily flow through insulators
b. which seek open circuits
c. firmly attached to the neutrons of an atom
d. orbiting about the nucleus of an atom
e. flowing through the atoms centre - Answer-✅d. orbiting about the nucleus of an atom
/.In an atom the electrons:
a. orbit around the protons only
b. orbit only the neutrons
c. are repelled by the neutrons
d. are large in size when compared to the protons
e. are attracted to the protons - Answer-✅e. are attracted to the protons
/.Atoms that have greater numbers of electrons in the outer shell are
, a. not good insulators
b. positively charged
c. good conductors
d. not good conductors
e. neutrally charged - Answer-✅d. not good conductors
/.The battery of an electrical circuit:
a. gives a load to the circuit
b. supplies electromotive force
c. decreases the resistance
d. withholds neutrons from the circuit
e. maintains lighting for the circuit - Answer-✅b. supplies electromotive force
/.The total resistance of three resistances in a series circuit can be given as:
a. R1 + R2 + R3
b. R1 x R2 x R3
c. R1/1 + R2/2 + R3/3
d. 1/R1 + 1/R2 + R3
e. (R1 x R2 x R3)/3 - Answer-✅a. R1 + R2 + R3
/.__________ is an electromotive force.
a. Power
b. Amperage
c. The ohm
d. The watt
e. The volt - Answer-✅e. The volt
/.Electromotive force
a. is able to move ohms through a resistance
b. is increased by a resistor
c. induces resistance to an open circuit
d. is capable of moving a quantity of electrons at some rate per period of time
e. is increased by a voltage drop - Answer-✅d. is capable of moving a quantity of
electrons at some rate per period of time
/.A current carrying conductor being moved by a magnetic field is the principle known as
a. electrolysis
b. motor action
c. magnetic flux
d. generator action
e. hydro-electrics - Answer-✅b. motor action
