Power Engineering - 4A Electro
Technology Practice Questions With
Complete Solutions | Verified
/. A typical extra low voltage device would be a:
Select one:
a. toaster
b. set of tree lights
c. door bell
d. residential lighting - Answer-✅c
/.As back EMF decreases the net armature EMF:
Select one:
a. remains constant
b. decreases
c. increases
d. decreases amount of armature current - Answer-✅c
/.Prior to using a voltage meter, what must be known:
Select one:
a. type of current
b. type of meter
c. expected measured value
d. if circuit is open or not - Answer-✅c
/.A property of a magnet, is that it will always point in the north direction:
Select one:
a. freely suspended in the air
b. charged with electricity
c. it is demagnetized
d. in the presence of iron filings - Answer-✅a
/.An ampere is the _________ of current flow:
Select one:
a. cause
b. resistance
c. measurement
d. reluctance - Answer-✅c
,/.Current transformers step down the current rather than the:
Select one:
a. resistance
b. voltage
c. conductance
d. number of poles - Answer-✅b
/.Three phase systems often use__________ to replace three-phase transformers:
Select one:
a. capacitors
b. pancake windings
c. Sandwich windings
d. banks of single-phase - Answer-✅d
/.Test meters come in 2 basic types, digital and:
Select one:
a. pneumatic
b. DMM
c. analogue
d. LCD - Answer-✅c
/.A moving conductor is at an angle of 90 degrees within the magnetic field:
Select one:
a. maximum resistance to current flow is attained
b. current will flow with the least resistance
c. motor action will be experienced
d. voltage generated will be at its maximum - Answer-✅d
/.The flow of electrons in a uniform direction from atom to atom through a circuit is
known as:
Select one:
a. electromotive force
b. potential difference
c. a short circuit
d. current - Answer-✅d
/.The magnetic field in a DC machine may be supplied by permanent magnets in small
units. Large DC machines use field poles that are essentially:
Select one:
a. insulators
b. resistors
c. non-magnetic
d. electromagnets - Answer-✅d
/.Three resistors of 170 ohms, 9 ohms, and 570 ohms are connected in series.
Determine the total equivalent resistance:
,Select one:
a. 391 ohms
b. 749 ohms
c. 7490 ohms
d. 3910 ohms - Answer-✅b
/.The property which determines whether or not a material will be easily magnetized is
called:
Select one:
a. reaction
b. conductivity
c. permeability
d. magnetism - Answer-✅c
/.Ammeters are connected with the negative or black lead connected to the:
Select one:
a. positive side of the circuit
b. parallel side of the circuit
c. negative side of the circuit
d. switch of the circuit - Answer-✅c
/.The strength of the magnetic field produced in a shunt wound generator:
Select one:
a. is weak
b. is fairly constant
c. fluctuates
d. is regulated by an external AC supply - Answer-✅b
/.Three major losses which occur in a transformer are iron losses, copper losses and:
Select one:
a. cooling losses
b. heat losses
c. flux leakage
d. capacitive losses - Answer-✅c
/.A typical low voltage device would include:
Select one:
a. 600V 3 phase motor
b. 24 V DC motor
c. buzzers and doorbells
d. feeder services for large buildings - Answer-✅A
/.This type of circuit may be used to reduce energy and installation costs for seasonal
loads by using the same supply capacity for the loads alternately:
Select one:
a. overload switch
, b. tie switch
c. transfer switch
d. safety switch - Answer-✅c
/.How many slip rings are required for a three phase stationary field alternator:
Select one:
a. 1
b. 2
c. 3
d. none - Answer-✅c
/.The _________ is a measure of electromotive force:
Select one:
a. ampere
b. ohm
c. watt
d. volt - Answer-✅d
/.A kilowatt hour meter has a small motor which:
Select one:
a. turns at a constant speed
b. slows down as power consumption increases
c. has a speed proportional to power consumption
d. moves the meter demand pointer - Answer-✅c
/.The three dimensional region surrounding a magnet where the force of the magnet can
be detected is the:
Select one:
a. magnetic field
b. permeability
c. reluctance
d. flux - Answer-✅a
/.What is the difference between the grounded conductor and the grounding conductor?:
Select one:
a. the grounding conductor is white
b. the grounded conductor is the identifier conductor and is white
c. the grounded conductor can be bare
d. the grounding conductor is the identifier conductor and is white - Answer-✅b
/.Dry type transformers that are not fan cooled are called:
Select one:
a. capacitive transformers
b. low capacitive transformers
c. ventilated transformers
Technology Practice Questions With
Complete Solutions | Verified
/. A typical extra low voltage device would be a:
Select one:
a. toaster
b. set of tree lights
c. door bell
d. residential lighting - Answer-✅c
/.As back EMF decreases the net armature EMF:
Select one:
a. remains constant
b. decreases
c. increases
d. decreases amount of armature current - Answer-✅c
/.Prior to using a voltage meter, what must be known:
Select one:
a. type of current
b. type of meter
c. expected measured value
d. if circuit is open or not - Answer-✅c
/.A property of a magnet, is that it will always point in the north direction:
Select one:
a. freely suspended in the air
b. charged with electricity
c. it is demagnetized
d. in the presence of iron filings - Answer-✅a
/.An ampere is the _________ of current flow:
Select one:
a. cause
b. resistance
c. measurement
d. reluctance - Answer-✅c
,/.Current transformers step down the current rather than the:
Select one:
a. resistance
b. voltage
c. conductance
d. number of poles - Answer-✅b
/.Three phase systems often use__________ to replace three-phase transformers:
Select one:
a. capacitors
b. pancake windings
c. Sandwich windings
d. banks of single-phase - Answer-✅d
/.Test meters come in 2 basic types, digital and:
Select one:
a. pneumatic
b. DMM
c. analogue
d. LCD - Answer-✅c
/.A moving conductor is at an angle of 90 degrees within the magnetic field:
Select one:
a. maximum resistance to current flow is attained
b. current will flow with the least resistance
c. motor action will be experienced
d. voltage generated will be at its maximum - Answer-✅d
/.The flow of electrons in a uniform direction from atom to atom through a circuit is
known as:
Select one:
a. electromotive force
b. potential difference
c. a short circuit
d. current - Answer-✅d
/.The magnetic field in a DC machine may be supplied by permanent magnets in small
units. Large DC machines use field poles that are essentially:
Select one:
a. insulators
b. resistors
c. non-magnetic
d. electromagnets - Answer-✅d
/.Three resistors of 170 ohms, 9 ohms, and 570 ohms are connected in series.
Determine the total equivalent resistance:
,Select one:
a. 391 ohms
b. 749 ohms
c. 7490 ohms
d. 3910 ohms - Answer-✅b
/.The property which determines whether or not a material will be easily magnetized is
called:
Select one:
a. reaction
b. conductivity
c. permeability
d. magnetism - Answer-✅c
/.Ammeters are connected with the negative or black lead connected to the:
Select one:
a. positive side of the circuit
b. parallel side of the circuit
c. negative side of the circuit
d. switch of the circuit - Answer-✅c
/.The strength of the magnetic field produced in a shunt wound generator:
Select one:
a. is weak
b. is fairly constant
c. fluctuates
d. is regulated by an external AC supply - Answer-✅b
/.Three major losses which occur in a transformer are iron losses, copper losses and:
Select one:
a. cooling losses
b. heat losses
c. flux leakage
d. capacitive losses - Answer-✅c
/.A typical low voltage device would include:
Select one:
a. 600V 3 phase motor
b. 24 V DC motor
c. buzzers and doorbells
d. feeder services for large buildings - Answer-✅A
/.This type of circuit may be used to reduce energy and installation costs for seasonal
loads by using the same supply capacity for the loads alternately:
Select one:
a. overload switch
, b. tie switch
c. transfer switch
d. safety switch - Answer-✅c
/.How many slip rings are required for a three phase stationary field alternator:
Select one:
a. 1
b. 2
c. 3
d. none - Answer-✅c
/.The _________ is a measure of electromotive force:
Select one:
a. ampere
b. ohm
c. watt
d. volt - Answer-✅d
/.A kilowatt hour meter has a small motor which:
Select one:
a. turns at a constant speed
b. slows down as power consumption increases
c. has a speed proportional to power consumption
d. moves the meter demand pointer - Answer-✅c
/.The three dimensional region surrounding a magnet where the force of the magnet can
be detected is the:
Select one:
a. magnetic field
b. permeability
c. reluctance
d. flux - Answer-✅a
/.What is the difference between the grounded conductor and the grounding conductor?:
Select one:
a. the grounding conductor is white
b. the grounded conductor is the identifier conductor and is white
c. the grounded conductor can be bare
d. the grounding conductor is the identifier conductor and is white - Answer-✅b
/.Dry type transformers that are not fan cooled are called:
Select one:
a. capacitive transformers
b. low capacitive transformers
c. ventilated transformers
