4TH CLASS POWER ENGINEERING UNIT A8: BASIC
CONCEPTS IN ELECTROTECHNOLOGY | 158
QUESTIONS AND ANSWERS | 2025/2026 UPDATE |
WITH COMPLETE SOLUTION
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
CONCEPTS IN ELECTROTECHNOLOGY | 158
QUESTIONS AND ANSWERS | 2025/2026 UPDATE |
WITH COMPLETE SOLUTION
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
