STATIONARY ENGINEER ELECTRIC
Actual Exam Questions and Answers Verified
Answers (100% Correct) Latest Exam 2025
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
The input of a motor is 40,000 watts and efficiency is 80 percent. The TOTAL
energy loss is __________ watts. - CORRECT ANSWER- 8,000
The full load current of a three-phase 5 hp motor operating at 200 volts, 60
cycles, and having an efficiency of 80 percent and a power factor of 85 percent
is MOST NEARLY amperes. - CORRECT ANSWER- 14.4
Of the following motors, the one that has the best speed regulation is the motor.
- CORRECT ANSWER- shunt
The full load speed of a 60-cycle 208 volt, 3 phase induction motor having 6
poles and operating with a slip of 10% is MOST NEARLY r.p.m -
CORRECT ANSWER- 1080
Of the following, a MAJOR advantage of an AC synchronous motor is that it(s)
- CORRECT ANSWER- can be used for power factor correction
If the field current of a synchronous motor is increased to a point which makes
the synchronous motor overexcited, the - CORRECT ANSWER- motor will
take a leading current
,When transformers are to be operated in parallel, it is NOT necessary that the
transformer have the same - CORRECT ANSWER- KVA rating
A transformer rates at 200 KVA is FULLY loaded with a lagging power factor of
80% when it is supplying - CORRECT ANSWER- 160 KW
If the current in the primary of a current transformer is 500 amperes and the
transformer has a ratio of 100 to 5, an ammeter connected to the secondary will
read MOST NEARLY amperes. - CORRECT ANSWER- 25
Assume that a switchboard ammeter which is connected to a current transformer
is damaged and must be removed without interrupting the service. Of the
following, an ESSENTIAL precaution to be taken before disconnecting the
ammeter is to - CORRECT ANSWER- short the secondary of the transformer
A DC relay is rated at 6 volts and 120 ohms. This relay can be operated from a
120 volt line by connecting a ohm resistance in with
relay - CORRECT ANSWER- 2280: series
Some relays are provided with dash-pots. The FUNCTION of these dash-pots is
to provide - CORRECT ANSWER- delayed time action
An ammeter has a full scale deflection for a current of 0.01 amperes and an
internal resistance of 20 ohms. In order to have the ammeter read full-scale for a
current of 10 amperes and not damage its movement, a shunt should be used
having a value of __________ ohms. - CORRECT ANSWER- 0.02
An air circuit breaker has contacts that flash. The MOST probable cause of this
trouble is that the - CORRECT ANSWER- barriers are broken
The MAIN purpose of a shunt trip on a circuit breaker is to - CORRECT
ANSWER- permit the breaker to be opened electrically from a remote location,
regardless of load conditions at the breaker
The grid-controlled gas-type electronic tube MOST often used in motor control
,circuits is the - CORRECT ANSWER- thyratron
Under normal atmospheric conditions, a pressure gauge that reads 24 inches of
mercury is indicating an absolute pressure of MOST NEARLY
P.S.I. - CORRECT ANSWER- 26.5
The PRIMARY function of a hydrometer is to measure the rate of - CORRECT
ANSWER- relative humidity
A venturi meter is used to measure the rate of - CORRECT ANSWER- fluid
flow
The PRINCIPLE thickening agent used in lubricating greases is - CORRECT
ANSWER- metallic soap
The specific gravity of liquid is USUALLY determined by means of a -
CORRECT ANSWER- hydrometer
The pull required on the fall line (negating friction) to hoist a 120 pounds
weight, using a four-part block and tackle, is lbs. - CORRECT
ANSWER- 30
Of the following terms, the one which does NOT describe a way of finishing the
ends of a rope is the - CORRECT ANSWER- bight
When hoisting a load by means of sling, the stress in each leg of the sling will -
CORRECT ANSWER- increase as the angle between the horizontal and the
sling leg decreases
The MAXIMUM pressure in an upright cylinder 6 feet in diameter, 8 feet high,
and open at the top, when filled tot he brim with water, is MOSTLY NEARLY
lbs/sq.ft. - CORRECT ANSWER- 500
The MAXIMUM height to which water can be lifted by means of suction alone,
, at sea level, is APPROXIMATELY feet. - CORRECT
ANSWER- 34
Actual Exam Questions and Answers Verified
Answers (100% Correct) Latest Exam 2025
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
The input of a motor is 40,000 watts and efficiency is 80 percent. The TOTAL
energy loss is __________ watts. - CORRECT ANSWER- 8,000
The full load current of a three-phase 5 hp motor operating at 200 volts, 60
cycles, and having an efficiency of 80 percent and a power factor of 85 percent
is MOST NEARLY amperes. - CORRECT ANSWER- 14.4
Of the following motors, the one that has the best speed regulation is the motor.
- CORRECT ANSWER- shunt
The full load speed of a 60-cycle 208 volt, 3 phase induction motor having 6
poles and operating with a slip of 10% is MOST NEARLY r.p.m -
CORRECT ANSWER- 1080
Of the following, a MAJOR advantage of an AC synchronous motor is that it(s)
- CORRECT ANSWER- can be used for power factor correction
If the field current of a synchronous motor is increased to a point which makes
the synchronous motor overexcited, the - CORRECT ANSWER- motor will
take a leading current
,When transformers are to be operated in parallel, it is NOT necessary that the
transformer have the same - CORRECT ANSWER- KVA rating
A transformer rates at 200 KVA is FULLY loaded with a lagging power factor of
80% when it is supplying - CORRECT ANSWER- 160 KW
If the current in the primary of a current transformer is 500 amperes and the
transformer has a ratio of 100 to 5, an ammeter connected to the secondary will
read MOST NEARLY amperes. - CORRECT ANSWER- 25
Assume that a switchboard ammeter which is connected to a current transformer
is damaged and must be removed without interrupting the service. Of the
following, an ESSENTIAL precaution to be taken before disconnecting the
ammeter is to - CORRECT ANSWER- short the secondary of the transformer
A DC relay is rated at 6 volts and 120 ohms. This relay can be operated from a
120 volt line by connecting a ohm resistance in with
relay - CORRECT ANSWER- 2280: series
Some relays are provided with dash-pots. The FUNCTION of these dash-pots is
to provide - CORRECT ANSWER- delayed time action
An ammeter has a full scale deflection for a current of 0.01 amperes and an
internal resistance of 20 ohms. In order to have the ammeter read full-scale for a
current of 10 amperes and not damage its movement, a shunt should be used
having a value of __________ ohms. - CORRECT ANSWER- 0.02
An air circuit breaker has contacts that flash. The MOST probable cause of this
trouble is that the - CORRECT ANSWER- barriers are broken
The MAIN purpose of a shunt trip on a circuit breaker is to - CORRECT
ANSWER- permit the breaker to be opened electrically from a remote location,
regardless of load conditions at the breaker
The grid-controlled gas-type electronic tube MOST often used in motor control
,circuits is the - CORRECT ANSWER- thyratron
Under normal atmospheric conditions, a pressure gauge that reads 24 inches of
mercury is indicating an absolute pressure of MOST NEARLY
P.S.I. - CORRECT ANSWER- 26.5
The PRIMARY function of a hydrometer is to measure the rate of - CORRECT
ANSWER- relative humidity
A venturi meter is used to measure the rate of - CORRECT ANSWER- fluid
flow
The PRINCIPLE thickening agent used in lubricating greases is - CORRECT
ANSWER- metallic soap
The specific gravity of liquid is USUALLY determined by means of a -
CORRECT ANSWER- hydrometer
The pull required on the fall line (negating friction) to hoist a 120 pounds
weight, using a four-part block and tackle, is lbs. - CORRECT
ANSWER- 30
Of the following terms, the one which does NOT describe a way of finishing the
ends of a rope is the - CORRECT ANSWER- bight
When hoisting a load by means of sling, the stress in each leg of the sling will -
CORRECT ANSWER- increase as the angle between the horizontal and the
sling leg decreases
The MAXIMUM pressure in an upright cylinder 6 feet in diameter, 8 feet high,
and open at the top, when filled tot he brim with water, is MOSTLY NEARLY
lbs/sq.ft. - CORRECT ANSWER- 500
The MAXIMUM height to which water can be lifted by means of suction alone,
, at sea level, is APPROXIMATELY feet. - CORRECT
ANSWER- 34
