Stationary Engineer Electric Final Exam
Prep
Exam 2026 Test Questions And Correct
Verified Answers
D
O
N
O
T
C
O
PY
The power factor of a load is equal to the ____________ power
divided by the ____________ power. - ANS-True ; apparent
A 10-ohms and 20-ohms resistor are connected in parallel. The
total line current drawn by this parallel combination is 30 amps.
Under these conditions, the line voltage will be ____________
volts. - ANS-200
,A 20-ohm resistor is connected in series with a parallel
combination of two resistors, one of which is 10-ohms, the
other 40-ohms. If the voltage across the parallel combination is
40 volts, the voltage across the 20-ohm series resistor is
________ volts. - ANS-100
A certain 120-volts single-phase AC circuit has a power factor of
D
80 percent and a watt-meter reading of 1150 watts. The current
O
drawn by the circuit is _________ amperes. - ANS-12
N
O
If the voltage between lines of a 3-phase, 3-wire delta
connected system is 2400 volts, then the phase voltage is
T
_____________ volts - ANS-2400
C
O
A circuit consists of an inductive reactance of 15 ohms and a
PY
resistor of 20 ohms in series across a 100-volts, 60 cycles AC
supply. The current in this circuit is ____________ amperes. -
ANS-4
A 3 phase, 3 wire, 208 volt, 60 cycles AC service supplies a
balanced load consisting of three 30 ohms resistors connected
wye. The line current under these conditions os MOST NEARLY
___________ amperes. - ANS-6
,If the level of the electrolyte in a lead acid storage battery falls
below the top of the plates because of evaporations under
normal operating conditions, it is BEST to add - ANS-Water
A 600 volt cartridge fuse must have knife blade contacts if its
current rating exceeds _____________ amperes. - ANS-60
D
O
When the magnitude of the short circuit currents in a feeder
circuit must be limited, this is USUALLY accomplished by means
N
of - ANS-reactors
O
T
The cross sectional area in circular mils of a standard cable
having 37 strands, each of which ha a diameter of 90 nils, is
C
MOST NEARLY - ANS-300,000
O
PY
A coil having an average diameter of 4 inches is to be made up
from a 1,260 ft long length of wire. The numbers of turns in this
coil will be MOST NEARLY - ANS-1,200
An AC circuit consists only of a pure inductance and a power
source. The relationship between the voltage and the current in
this circuit is that the - ANS-current lags the voltage
, The device commonly known as a growler is FREQUENTLY used
to - ANS-test DC armature windings for shorts
When a megger is applied alternately to the two leads of a
direct current electrolytic capacitor, the reading will - ANS-start
at zero but increase gradually for one of the connections
D
The device used to convert direct current to alternating current
O
is called - ANS-inverters
N
O
Of the following conditions, the one which is MOST likely to
cause flashing or excessive arcing from brush to brush in a
T
motor is - ANS-Excessively high voltage on the line
C
O
The currents in the armature equalizer connections in a DC
PY
generator are - ANS-alternating currents
A generating station has one 1000 Kw and two 2000 Kw
generators. To supply 2000 Kw MOST economically, the
operating conditions should be - ANS-one 2000 Kw generator at
full load
Prep
Exam 2026 Test Questions And Correct
Verified Answers
D
O
N
O
T
C
O
PY
The power factor of a load is equal to the ____________ power
divided by the ____________ power. - ANS-True ; apparent
A 10-ohms and 20-ohms resistor are connected in parallel. The
total line current drawn by this parallel combination is 30 amps.
Under these conditions, the line voltage will be ____________
volts. - ANS-200
,A 20-ohm resistor is connected in series with a parallel
combination of two resistors, one of which is 10-ohms, the
other 40-ohms. If the voltage across the parallel combination is
40 volts, the voltage across the 20-ohm series resistor is
________ volts. - ANS-100
A certain 120-volts single-phase AC circuit has a power factor of
D
80 percent and a watt-meter reading of 1150 watts. The current
O
drawn by the circuit is _________ amperes. - ANS-12
N
O
If the voltage between lines of a 3-phase, 3-wire delta
connected system is 2400 volts, then the phase voltage is
T
_____________ volts - ANS-2400
C
O
A circuit consists of an inductive reactance of 15 ohms and a
PY
resistor of 20 ohms in series across a 100-volts, 60 cycles AC
supply. The current in this circuit is ____________ amperes. -
ANS-4
A 3 phase, 3 wire, 208 volt, 60 cycles AC service supplies a
balanced load consisting of three 30 ohms resistors connected
wye. The line current under these conditions os MOST NEARLY
___________ amperes. - ANS-6
,If the level of the electrolyte in a lead acid storage battery falls
below the top of the plates because of evaporations under
normal operating conditions, it is BEST to add - ANS-Water
A 600 volt cartridge fuse must have knife blade contacts if its
current rating exceeds _____________ amperes. - ANS-60
D
O
When the magnitude of the short circuit currents in a feeder
circuit must be limited, this is USUALLY accomplished by means
N
of - ANS-reactors
O
T
The cross sectional area in circular mils of a standard cable
having 37 strands, each of which ha a diameter of 90 nils, is
C
MOST NEARLY - ANS-300,000
O
PY
A coil having an average diameter of 4 inches is to be made up
from a 1,260 ft long length of wire. The numbers of turns in this
coil will be MOST NEARLY - ANS-1,200
An AC circuit consists only of a pure inductance and a power
source. The relationship between the voltage and the current in
this circuit is that the - ANS-current lags the voltage
, The device commonly known as a growler is FREQUENTLY used
to - ANS-test DC armature windings for shorts
When a megger is applied alternately to the two leads of a
direct current electrolytic capacitor, the reading will - ANS-start
at zero but increase gradually for one of the connections
D
The device used to convert direct current to alternating current
O
is called - ANS-inverters
N
O
Of the following conditions, the one which is MOST likely to
cause flashing or excessive arcing from brush to brush in a
T
motor is - ANS-Excessively high voltage on the line
C
O
The currents in the armature equalizer connections in a DC
PY
generator are - ANS-alternating currents
A generating station has one 1000 Kw and two 2000 Kw
generators. To supply 2000 Kw MOST economically, the
operating conditions should be - ANS-one 2000 Kw generator at
full load
