4th Class Power Engineering Unit A8: Basic Concepts in Electrotechnology
UPDATED ACTUAL Questions and CORRECT Answers
Question: A typical extra low voltage device would be a
Correct Answer: Select one: a. toaster b. set of tree lights c. door bell d. residential lighting: c
Question: As back EMF decreases the net armature EMF
Correct Answer: Select one: a. remains constant b. decreases c. increases d. decreases amount of armature
current: c
Question: Prior to using a voltage meter, what must be known
Correct Answer: Select one: a. type of current b. type of meter c. expected measured value d. if circuit is
open or not: c
Question: A property of a magnet, is that it will always point in the north direction
Correct Answer: Select one: a. freely suspended in the air b. charged with electricity c. it is demagnetized
d. in the presence of iron filings: a
Question: An ampere is the _________ of current flow
Correct Answer: Select one: a. cause b. resistance c. measurement d. reluctance: c
Question: Current transformers step down the current rather than the
Correct Answer: Select one: a. resistance b. voltage c. conductance d. number of poles: b
Question: Three phase systems often use__________ to replace three-phase transformers
Correct Answer: Select one: a. capacitors b. pancake windings c. Sandwich windings d. banks of
single-phase: d
Question: Test meters come in 2 basic types, digital and
Correct Answer: Select one: a. pneumatic b. DMM c. analogue d. LCD: c
Question: A moving conductor is at an angle of 90 degrees within the magnetic field
Correct Answer: 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: d
Question: The flow of electrons in a uniform direction from atom to atom through a circuit is known as
Correct Answer: Select one: a. electromotive force b. potential difference c. a short circuit d. current: d
Question: 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
Correct Answer: Select one: a. insulators b. resistors c. non-magnetic d. electromagnets: d
Question: Three resistors of 170 ohms, 9 ohms, and 570 ohms are connected in series. Determine the total
equivalent resistance
Correct Answer: Select one: a. 391 ohms b. 749 ohms c. 7490 ohms d. 3910 ohms: b
Question: The property which determines whether or not a material will be easily magnetized is called
Correct Answer: Select one: a. reaction b. conductivity c. permeability d. magnetism: c
, Question: Ammeters are connected with the negative or black lead connected to the
Correct Answer: 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: c
Question: The strength of the magnetic field produced in a shunt wound generator
Correct Answer: Select one: a. is weak b. is fairly constant c. fluctuates d. is regulated by an external AC
supply: b
Question: Three major losses which occur in a transformer are iron losses, copper losses and
Correct Answer: Select one: a. cooling losses b. heat losses c. flux leakage d. capacitive losses: c
Question: A typical low voltage device would include
Correct Answer: Select one: a. 600V 3 phase motor b. 24 V DC motor c. buzzers and doorbells d. feeder
services for large buildings: a
Question: 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
Correct Answer: Select one: a. overload switch b. tie switch c. transfer switch d. safety switch: c
Question: How many slip rings are required for a three phase stationary field alternator
Correct Answer: Select one: a. 1 b. 2 c. 3 d. none: c
Question: The _________ is a measure of electromotive force
Correct Answer: Select one: a. ampere b. ohm c. watt d. volt: d
Question: A kilowatt hour meter has a small motor which
Correct Answer: 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: c
Question: The three dimensional region surrounding a magnet where the force of the magnet can be
detected is the
Correct Answer: Select one: a. magnetic field b. permeability c. reluctance d. flux: a
Question: What is the difference between the grounded conductor and the grounding conductor?
Correct Answer: 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: b
Question: Dry type transformers that are not fan cooled are called
Correct Answer: Select one: a. capacitive transformers b. low capacitive transformers c. ventilated
transformers d. non-ventilated transformers: d
Question: Apparent power is the power
Correct Answer: Select one: a. used for the actual work b. generated by rotating equipment c. supplied by
the utility d. caused by system capacitance: c
Question: Changing light bulbs can only be performed by qualified electrical personnel in
Correct Answer: Select one: a. Apartment building parking garage b. Mechanical room with heating boiler
c. Gas processing plants d. all of the above: c
UPDATED ACTUAL Questions and CORRECT Answers
Question: A typical extra low voltage device would be a
Correct Answer: Select one: a. toaster b. set of tree lights c. door bell d. residential lighting: c
Question: As back EMF decreases the net armature EMF
Correct Answer: Select one: a. remains constant b. decreases c. increases d. decreases amount of armature
current: c
Question: Prior to using a voltage meter, what must be known
Correct Answer: Select one: a. type of current b. type of meter c. expected measured value d. if circuit is
open or not: c
Question: A property of a magnet, is that it will always point in the north direction
Correct Answer: Select one: a. freely suspended in the air b. charged with electricity c. it is demagnetized
d. in the presence of iron filings: a
Question: An ampere is the _________ of current flow
Correct Answer: Select one: a. cause b. resistance c. measurement d. reluctance: c
Question: Current transformers step down the current rather than the
Correct Answer: Select one: a. resistance b. voltage c. conductance d. number of poles: b
Question: Three phase systems often use__________ to replace three-phase transformers
Correct Answer: Select one: a. capacitors b. pancake windings c. Sandwich windings d. banks of
single-phase: d
Question: Test meters come in 2 basic types, digital and
Correct Answer: Select one: a. pneumatic b. DMM c. analogue d. LCD: c
Question: A moving conductor is at an angle of 90 degrees within the magnetic field
Correct Answer: 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: d
Question: The flow of electrons in a uniform direction from atom to atom through a circuit is known as
Correct Answer: Select one: a. electromotive force b. potential difference c. a short circuit d. current: d
Question: 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
Correct Answer: Select one: a. insulators b. resistors c. non-magnetic d. electromagnets: d
Question: Three resistors of 170 ohms, 9 ohms, and 570 ohms are connected in series. Determine the total
equivalent resistance
Correct Answer: Select one: a. 391 ohms b. 749 ohms c. 7490 ohms d. 3910 ohms: b
Question: The property which determines whether or not a material will be easily magnetized is called
Correct Answer: Select one: a. reaction b. conductivity c. permeability d. magnetism: c
, Question: Ammeters are connected with the negative or black lead connected to the
Correct Answer: 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: c
Question: The strength of the magnetic field produced in a shunt wound generator
Correct Answer: Select one: a. is weak b. is fairly constant c. fluctuates d. is regulated by an external AC
supply: b
Question: Three major losses which occur in a transformer are iron losses, copper losses and
Correct Answer: Select one: a. cooling losses b. heat losses c. flux leakage d. capacitive losses: c
Question: A typical low voltage device would include
Correct Answer: Select one: a. 600V 3 phase motor b. 24 V DC motor c. buzzers and doorbells d. feeder
services for large buildings: a
Question: 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
Correct Answer: Select one: a. overload switch b. tie switch c. transfer switch d. safety switch: c
Question: How many slip rings are required for a three phase stationary field alternator
Correct Answer: Select one: a. 1 b. 2 c. 3 d. none: c
Question: The _________ is a measure of electromotive force
Correct Answer: Select one: a. ampere b. ohm c. watt d. volt: d
Question: A kilowatt hour meter has a small motor which
Correct Answer: 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: c
Question: The three dimensional region surrounding a magnet where the force of the magnet can be
detected is the
Correct Answer: Select one: a. magnetic field b. permeability c. reluctance d. flux: a
Question: What is the difference between the grounded conductor and the grounding conductor?
Correct Answer: 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: b
Question: Dry type transformers that are not fan cooled are called
Correct Answer: Select one: a. capacitive transformers b. low capacitive transformers c. ventilated
transformers d. non-ventilated transformers: d
Question: Apparent power is the power
Correct Answer: Select one: a. used for the actual work b. generated by rotating equipment c. supplied by
the utility d. caused by system capacitance: c
Question: Changing light bulbs can only be performed by qualified electrical personnel in
Correct Answer: Select one: a. Apartment building parking garage b. Mechanical room with heating boiler
c. Gas processing plants d. all of the above: c
