Common System erros

752/763: Hydraulic motor generator (HMG) operation automatically switches the Captain’s RDMI to:

A) The center IRU

B) The right IRU

C) The left IRU

D) Any available IRU

767: According to the graphic, the left electronic engine control alternate mode (ALTN) switch light has illuminated. This indicates:

A) Automatic reversion or manual selection to the alternate mode

B) Reverse thrust has no overspeed protection

C) Maximum thrust red-line protection is no longer available

D) The EEC can no longer control engine speed and decelerates to and remains at minimum fuel flow

757/767: With the FUEL CONTROL switch out of CUTOFF, rotating the ENGINE START selector to the FLT position:

A) Causes selected ignition System for the associated engine to operate continuously

B) Causes an auto relight initiated automatically

C) Bypasses the ignition selector and causes both ignition systems to operate continously

D) Bypasses the ignition selector and causes both ignition systems to operate continuously for 120 seconds

757: With the center tank pumps off, remaining center tank fuel is automatically scavenged by a fuel scavenge ejector pump. A valve allows fuel to be discharged into the __________ when that tank is less than 50% full.

A) Associated main fuel tank

B) Left surge tank

C) Right main tank

D) Left main tank

767: With _______________, scavenge of remaining center tank fuel begins when the main tanks are approximately half full.

A) Center tank pumps off

B) Center tank pumps on

C) A crossfeed valve open

D) N3 above 50%

757: The hydraulic motor generator (HMG) is automatically powered by the ___________ whenever both main AC busses become unpowered in flight.

A) The left engine hydraulic pump or the PTU, if operating

B) The right engine hydraulic pump or the PTU, if operating

C) The center engine hydraulic pump or the PTU, if operating

D) The center engine hydraulic pump or the ADP, if operating

757: To prevent electrical overloads, the No. 2 electric pump is inhibited when only one generator (APU or engine) or only external power is available and:

A) Left and right electric pump switches are on

B) both engine-driven pump switches are on

C) Both center hydraulic electric pump switches are on

D) The right electric pump switch is on

767: In the AUTO position, the air-driven demand pump (ADP) operates automatically whenever the landing gear, flaps, slats, or speed brakes/ground spoilers are selected for operation. The ADP will also operate when:

A) Center system hydraulic presser drops to a preset value

B) The center No. 2 electric primary pump is inoperative

C) The center No. 1 electric primary pump is inoperative

D) Left hydraulic pressure drops to a preset value

757/767: The emergency lighting system consists of passenger cabin interior emergency lights, passenger exterior emergency lights, and an aft flight deck dome light. The system is powered by remote batteries. Battery charge is maintained by the _____________.

A) Ground service bus

B) Left main DC bus

C) right utility bus

D) Right main DC

757: The right DUCT LEAK light is illuminated. What does this indicate?

A) The engine bleed system pressure is excessive

B) A high temperature bleed air leak is detected

C) A bleed air leak in the engine anti-ice duct is detected

D) Overpressure is detected in either wing anti-ice duct

757: The left engine HI STAGE light is illuminated. What does this indicate?

A) The left engine bleed system temperature is excessive and the engine high pressure bleed air valve is automatically locked open

B) The left engine bleed system temperature is excessive and the engine high pressure bleed air valve is automatically locked closed

C) The left engine bleed system pressure is excessive and the engine high pressure bleed air valve is automatically locked open

D) The left engine bleed system pressure is excessive and the engine high pressure bleed air valve is automatically locked closed

757/767: What will occur if the selected (AUTO 1 or AUTO 2) pressurization controller fails?

A) Control is automatically switched to the other controller

B) Cabin altitude automatically descend to 4000 feet

C) Control is automatically switched to the MAN controller

D) The AUTO INOP light illuminates

757/767: During normal operation, the __________ is the source for the Captain’s ADI, HSI, and VSI.

A) Right IRU

B) Center IRU

C) Left IRU

D) Left, right, or center IRU

757/767: The DC FAIL light is illuminated on the IRS mode selector panel for the left IRU. This indicates that:

A) left IRU's input is not reliable for navigation

B) The left main DC bus is not powered

C) DC backup power for the related IRU has failed

D) The left IRU has lost AC power

767: With _______________, scavenge of remaining center tank fuel begins when the main tanks are approximately half full.

A) Center tank pumps off

B) Center tank pumps on

C) A crossfeed valve open

D) N3 above 50%

757: Trailing edge flaps and leading edge slats are hydraulically operated by drive units normally powered by the _____ hydraulic system(s).

A) Right

B) Left

C) Center

D) Left, center and right

757/767: Inflight and ground operation of various aircraft systems are controlled by the air/ground sensing system and the nose air/ground sensing systems. They receive logic signals from:

A) Tilt sensors located on each main landing gear and nose gear strut compression sensors

B) Titl sensors located on each main landing gear and IRU pitch information

C) Main landing gear strut compression sensors

D) Nose gear strut tilt sensors

757/767: The UNSCHED STAB TRIM light illuminates when:

A) One of the two stabilizer brakes failed to release when trimming with the stabilizer trim

B) Fault in the Mach speed trim switches

C) Stabilizer trim movement without signal from trim switches, Mach/speed trim system or autopilot

D) The engaged autopilot is operating in a degreaded mode

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