11.18 On Board Maintence Systems

Question 1

What is the purpose of a dual CMC installation in the CMS?

A) To provide redundant electrical power
B) To allow all data inputs to go to both units
C) To enable faster GPS signal acquisition

Answer 1

B) To allow all data inputs to go to both units

Question 2

What is the role of the standby CMC in a dual installation?

A) To mirror the active CMC’s outputs
B) To remain on standby while the other is active
C) To act as the main power source

Answer 2

B) To remain on standby while the other is active

Question 3

What happens if the active CMC fails?

A) The system shuts down completely
B) The standby CMC is automatically or manually selected by the flight deck switch
C) The flight crew must reset the active CMC

Answer 3

B) The standby CMC is automatically or manually selected by the flight deck switch

Question 4

What causes a hard failure?

A) Lack of maintenance
B) Performance Change of a system caused by a Failure of the operating system, an LRU component, aircraft wiring, or related systems
C) Temporary loss of power

Answer 4

B) Performance Change of a system caused by a Failure of the operating system, an LRU component, aircraft wiring, or related systems

Question 5

What defines a soft failure?

A) Immediate changes to system performance
B) A system or LRU failure with no immediate changes to performance
C) Complete system shutdown

Answer 5

B) A system or LRU failure with no immediate changes to performance

Question 6

What does BITE stand for?

A) Basic Internal Testing Equipment
B) Built-in Test Equipment
C) Backup Instrument Testing Equipment

Answer 6

B) Built-in Test Equipment

Question 7

What is contained in units monitored by the CMC?

A) Backup data processors with external testing
B) Circuits known as Built-in Test Equipment (BITE)
C) External test devices

Answer 7

B) Circuits known as Built-in Test Equipment (BITE)

Question 8

What does ACARS stand for?

A) Aircraft Communications Addressing and Reporting System
B) Automated Control and Reporting System
C) Aircraft Command and Routing System

Answer 8

A) Aircraft Communications Addressing and Reporting System

Question 9

What materials are Intelligent Skins normally limited to?

A) Metal alloys
B) Composite materials
C) Ceramic coatings

Answer 9

B) Composite materials

Question 10

PMAT portable MAT