STATIONARY ENGINEER ELECTRIC 2024-2025
QUESTIONS WITH 100% CORRECT ANSWER
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 -
CORRECT ANSWER current lags the voltage
The power factor of a load is equal to the ____________ power divided by the
____________ power. - CORRECT ANSWER 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. - CORRECT ANSWER 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. - CORRECT ANSWER 100
A certain 120-volts single-phase AC circuit has a power factor of 80 percent and a
watt-meter reading of 1150 watts. The current drawn by the circuit is _________
amperes. - CORRECT ANSWER 12
If the voltage between lines of a 3-phase, 3-wire delta connected system is 2400
volts, then the phase voltage is _____________ volts - CORRECT ANSWER
2400
,STATIONARY ENGINEER ELECTRIC 2024-2025
QUESTIONS WITH 100% CORRECT ANSWER
A circuit consists of an inductive reactance of 15 ohms and a resistor of 20 ohms
in series across a 100-volts, 60 cycles AC supply. The current in this circuit is
____________ amperes. - CORRECT ANSWER 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. - CORRECT ANSWER
6.9
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 - CORRECT ANSWER Water
A 600 volt cartridge fuse must have knife blade contacts if its current rating
exceeds _____________ amperes. - CORRECT ANSWER 60
When the magnitude of the short circuit currents in a feeder circuit must be
limited, this is USUALLY accomplished by means of - CORRECT ANSWER
reactors
The cross sectional area in circular mils of a standard cable having 37 strands,
each of which ha a diameter of 90 nils, is MOST NEARLY - CORRECT ANSWER
300,000
,STATIONARY ENGINEER ELECTRIC 2024-2025
QUESTIONS WITH 100% CORRECT ANSWER
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 -
CORRECT ANSWER 1,200
The device commonly known as a growler is FREQUENTLY used to - CORRECT
ANSWER 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 - CORRECT ANSWER start at zero but
increase gradually for one of the connections
The device used to convert direct current to alternating current is called -
CORRECT ANSWER inverters
Of the following conditions, the one which is MOST likely to cause flashing or
excessive arcing from brush to brush in a motor is - CORRECT ANSWER
Excessively high voltage on the line
The currents in the armature equalizer connections in a DC generator are -
CORRECT ANSWER alternating currents
, STATIONARY ENGINEER ELECTRIC 2024-2025
QUESTIONS WITH 100% CORRECT ANSWER
A generating station has one 1000 Kw and two 2000 Kw generators. To supply
2000 Kw MOST economically, the operating conditions should be - CORRECT
ANSWER one 2000 Kw generator at full load
The terminal voltage of a DC shunt generator having an armature current of 100
amperes, an armature resistance of 0.02 ohms, and a generated E.M.F of 222
volts is MOST NEARLY ______________ volts. - CORRECT ANSWER 220
The number of poles in the field of an alternator generating voltage at a
frequency of 60 cycles per second while rotating at 1200 rpm is - CORRECT
ANSWER 6
If the field of a shunt motor opens while running, the motor will - CORRECT
ANSWER run away
To reverse the direction of rotation of a cumulative compound motor, and not
have it run as a differential compound motor, reverse the connections to the
____________ field. - CORRECT ANSWER shunt field and to the series
A main contributing factor to motor stator failure usually is - CORRECT ANSWER
dirt
QUESTIONS WITH 100% CORRECT ANSWER
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 -
CORRECT ANSWER current lags the voltage
The power factor of a load is equal to the ____________ power divided by the
____________ power. - CORRECT ANSWER 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. - CORRECT ANSWER 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. - CORRECT ANSWER 100
A certain 120-volts single-phase AC circuit has a power factor of 80 percent and a
watt-meter reading of 1150 watts. The current drawn by the circuit is _________
amperes. - CORRECT ANSWER 12
If the voltage between lines of a 3-phase, 3-wire delta connected system is 2400
volts, then the phase voltage is _____________ volts - CORRECT ANSWER
2400
,STATIONARY ENGINEER ELECTRIC 2024-2025
QUESTIONS WITH 100% CORRECT ANSWER
A circuit consists of an inductive reactance of 15 ohms and a resistor of 20 ohms
in series across a 100-volts, 60 cycles AC supply. The current in this circuit is
____________ amperes. - CORRECT ANSWER 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. - CORRECT ANSWER
6.9
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 - CORRECT ANSWER Water
A 600 volt cartridge fuse must have knife blade contacts if its current rating
exceeds _____________ amperes. - CORRECT ANSWER 60
When the magnitude of the short circuit currents in a feeder circuit must be
limited, this is USUALLY accomplished by means of - CORRECT ANSWER
reactors
The cross sectional area in circular mils of a standard cable having 37 strands,
each of which ha a diameter of 90 nils, is MOST NEARLY - CORRECT ANSWER
300,000
,STATIONARY ENGINEER ELECTRIC 2024-2025
QUESTIONS WITH 100% CORRECT ANSWER
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 -
CORRECT ANSWER 1,200
The device commonly known as a growler is FREQUENTLY used to - CORRECT
ANSWER 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 - CORRECT ANSWER start at zero but
increase gradually for one of the connections
The device used to convert direct current to alternating current is called -
CORRECT ANSWER inverters
Of the following conditions, the one which is MOST likely to cause flashing or
excessive arcing from brush to brush in a motor is - CORRECT ANSWER
Excessively high voltage on the line
The currents in the armature equalizer connections in a DC generator are -
CORRECT ANSWER alternating currents
, STATIONARY ENGINEER ELECTRIC 2024-2025
QUESTIONS WITH 100% CORRECT ANSWER
A generating station has one 1000 Kw and two 2000 Kw generators. To supply
2000 Kw MOST economically, the operating conditions should be - CORRECT
ANSWER one 2000 Kw generator at full load
The terminal voltage of a DC shunt generator having an armature current of 100
amperes, an armature resistance of 0.02 ohms, and a generated E.M.F of 222
volts is MOST NEARLY ______________ volts. - CORRECT ANSWER 220
The number of poles in the field of an alternator generating voltage at a
frequency of 60 cycles per second while rotating at 1200 rpm is - CORRECT
ANSWER 6
If the field of a shunt motor opens while running, the motor will - CORRECT
ANSWER run away
To reverse the direction of rotation of a cumulative compound motor, and not
have it run as a differential compound motor, reverse the connections to the
____________ field. - CORRECT ANSWER shunt field and to the series
A main contributing factor to motor stator failure usually is - CORRECT ANSWER
dirt
