B737 NG Systems Exam Questions
and Answers||A+ Solution guide
(Verified)
ELECTRICAL The OFF position of the Bus Transfer Switch opens the _______. -
Answer- DC Crosstie Relay
ELECTRICAL (T/F) When the APU is started, it will automatically come online and
replace the previous power source. - Answer- False
ELECTRICAL With the Battery switch OFF - the Standby Power switch must be placed
to _____ to power the Standby system from the Battery. - Answer- BATT
ELECTRICAL DC power is normally provided by onboard _____ DC Transformer
Rectifiers that convert AC power to DC power. - Answer- 28 volt
ELECTRICAL The Battery Bus is normally powered from _____. - Answer- TR3
ELECTRICAL (T/F) A disconnected IDG can only be reconnected on the ground, by
maintenance. - Answer- True
ELECTRICAL The BAT switch OFF position removes power from the Battery Bus and
_____ when operating with normal power available and the Standby Power switch in
AUTO. - Answer- Switched Hot Battery Bus
ELECTRICAL (T/F) When an engine is started, its IDG automatically comes online and
powers the respective side of the electrical system. - Answer- False
ELECTRICAL With the Bus Transfer switch in _____, the Bus Tie Breakers (BTB) can
automatically power the entire electrical system from a single AC power source. -
Answer- AUTO
ELECTRICAL Inflight or on the Ground with normal conditions, the Standby Power
switch in the AUTO position allows the AC Standby Bus to be normally powered by
_____. - Answer- Transfer Bus 1
ELECTRICAL How is the DC system powered? - Answer- Powered from the AC system
through transformer rectifiers.
ELECTRICAL Each IDG is driven by the _____ accessory drive of the engine. - Answer-
N2
ELECTRICAL The aircraft is equipped with _____ -90KVA generators. - Answer- Three
, ELECTRICAL In case of an overload condition, the galley power on _____ is shed first.
- Answer- Transfer Bus 2
ELECTRICAL (T/F) If an overload exists after shedding of galley power, Main Bus 1 and
Main Bus 2 are shed. - Answer- True
ELECTRICAL (T/F) There is never a time that two generators are allowed to power the
same Transfer Bus. - Answer- True
ELECTRICAL The normally closed Cross Bus Tie relay opens when the autoflight
Approach mode captures the _____ with the Flight Director or Autopilot in use. -
Answer- Glideslope
ELECTRICAL (T/F) The aircraft battery can not provide power to AC components. -
Answer- False
POWERPLANT (T/F) The primary airflow continues to flow normally during reverse
operations. - Answer- True
POWERPLANT An amber ENG FAIL alert appears on the EGT display if the N2 rpm
falls below _____ with the start lever in idle. - Answer- 50%
POWERPLANT The starter is _____ operated. - Answer- Pneumatically
POWERPLANT When engine reverse thrust is selected, an _____ REV appears above
the N1 digital display box while the reverser is in transit. - Answer- Amber
POWERPLANT Low oil pressure (below approximately 13 psi) causes the illumination
of the associated _____ LOW OIL PRESSURE annunciator on the Upper DU. - Answer-
Amber
POWERPLANT The EGT display changes from white to amber if the maximum
continuous EGT is exceeded for more than _____. - Answer- Five minutes
POWERPLANT The lights for the engine fuel shutoff valve and the spar shutoff valve
appear _____ when the valves are closed. - Answer- Dim blue
POWERPLANT The _____ is the free spool, while the _____ is the driven spool that is
connected (by gears) to the accessory section. - Answer- N1; N2
POWERPLANT The ignition _____ position is used for takeoff, landing, flight in
precipitation, and engine operation in icing conditions. - Answer- CONT
POWERPLANT The N1 dial, pointer, and digital display turn _____ if the max operating
N1 rpm is exceeded. - Answer- Red
and Answers||A+ Solution guide
(Verified)
ELECTRICAL The OFF position of the Bus Transfer Switch opens the _______. -
Answer- DC Crosstie Relay
ELECTRICAL (T/F) When the APU is started, it will automatically come online and
replace the previous power source. - Answer- False
ELECTRICAL With the Battery switch OFF - the Standby Power switch must be placed
to _____ to power the Standby system from the Battery. - Answer- BATT
ELECTRICAL DC power is normally provided by onboard _____ DC Transformer
Rectifiers that convert AC power to DC power. - Answer- 28 volt
ELECTRICAL The Battery Bus is normally powered from _____. - Answer- TR3
ELECTRICAL (T/F) A disconnected IDG can only be reconnected on the ground, by
maintenance. - Answer- True
ELECTRICAL The BAT switch OFF position removes power from the Battery Bus and
_____ when operating with normal power available and the Standby Power switch in
AUTO. - Answer- Switched Hot Battery Bus
ELECTRICAL (T/F) When an engine is started, its IDG automatically comes online and
powers the respective side of the electrical system. - Answer- False
ELECTRICAL With the Bus Transfer switch in _____, the Bus Tie Breakers (BTB) can
automatically power the entire electrical system from a single AC power source. -
Answer- AUTO
ELECTRICAL Inflight or on the Ground with normal conditions, the Standby Power
switch in the AUTO position allows the AC Standby Bus to be normally powered by
_____. - Answer- Transfer Bus 1
ELECTRICAL How is the DC system powered? - Answer- Powered from the AC system
through transformer rectifiers.
ELECTRICAL Each IDG is driven by the _____ accessory drive of the engine. - Answer-
N2
ELECTRICAL The aircraft is equipped with _____ -90KVA generators. - Answer- Three
, ELECTRICAL In case of an overload condition, the galley power on _____ is shed first.
- Answer- Transfer Bus 2
ELECTRICAL (T/F) If an overload exists after shedding of galley power, Main Bus 1 and
Main Bus 2 are shed. - Answer- True
ELECTRICAL (T/F) There is never a time that two generators are allowed to power the
same Transfer Bus. - Answer- True
ELECTRICAL The normally closed Cross Bus Tie relay opens when the autoflight
Approach mode captures the _____ with the Flight Director or Autopilot in use. -
Answer- Glideslope
ELECTRICAL (T/F) The aircraft battery can not provide power to AC components. -
Answer- False
POWERPLANT (T/F) The primary airflow continues to flow normally during reverse
operations. - Answer- True
POWERPLANT An amber ENG FAIL alert appears on the EGT display if the N2 rpm
falls below _____ with the start lever in idle. - Answer- 50%
POWERPLANT The starter is _____ operated. - Answer- Pneumatically
POWERPLANT When engine reverse thrust is selected, an _____ REV appears above
the N1 digital display box while the reverser is in transit. - Answer- Amber
POWERPLANT Low oil pressure (below approximately 13 psi) causes the illumination
of the associated _____ LOW OIL PRESSURE annunciator on the Upper DU. - Answer-
Amber
POWERPLANT The EGT display changes from white to amber if the maximum
continuous EGT is exceeded for more than _____. - Answer- Five minutes
POWERPLANT The lights for the engine fuel shutoff valve and the spar shutoff valve
appear _____ when the valves are closed. - Answer- Dim blue
POWERPLANT The _____ is the free spool, while the _____ is the driven spool that is
connected (by gears) to the accessory section. - Answer- N1; N2
POWERPLANT The ignition _____ position is used for takeoff, landing, flight in
precipitation, and engine operation in icing conditions. - Answer- CONT
POWERPLANT The N1 dial, pointer, and digital display turn _____ if the max operating
N1 rpm is exceeded. - Answer- Red
