Which of the following is the correct order for the path of light in a HUD? - Avionics MCQ

Aeronautical & Aerospace Engineering : Avionics - Quiz(MCQ)

Which of the following is the correct order for the path of light in a HUD?

A)

CRT -> collimating lens -> mirror -> combiner glass -> pilot

B)

CRT -> mirror -> collimating lens -> combiner glass -> pilot

C)

Collimating lens -> CRT -> mirror -> combiner glass -> pilot

D)

CRT -> mirror -> combiner glass -> collimating lens -> pilot

Correct Answer : CRT -> mirror -> collimating lens -> combiner glass -> pilot

Explanation : The symbols and flight parameters are generated and magnified by the CRT (Cathode Ray Tube) and is reflected almost 90° by a mirror. The reflected rays are passed through a collimating lens which produces a parallel ray of light with focus at infinity. The collimated rays are then displayed in a combiner glass which combines the outside world picture with the flight parameters generated to be viewed by the pilot.

Recently Updated in Avionics Questions

Only the pilot of a particular aircraft can use its DVI control system?

A)

True

B)

False

C)

Can Not Say

D)

None of the above

Correct Answer : Option (B) : False

Explanation : The DVI control system is a universal system which can recognize the voice of anyone if spoken clearly. This is done for maintenance purposes and for an emergency.

The DVI control system need not be super sensitive to the voice of the pilot.

A)

True

B)

False

C)

Can Not Say

D)

None of the above

Correct Answer : Option (B) : False

Explanation : The DVI control system must be super sensitive to the voice of the pilot so that it can be operated in cockpit noise environment. In a fast jet combat aircraft, the background noise levels can be very high.

What are isolated word recognizers?

A)

System that is not fully voice commanded

B)

Systems that can recognize anyone’s voice

C)

Systems that require a pause between each word to recognize

D)

Systems that only accept one-word command

Correct Answer : Option (C) : Systems that require a pause between each word to recognize

Explanation : An isolated word recognizer requires pauses between each word said as it cannot recognize fully connected speech. The DVI control in an aircraft must not be an isolated voice recognizer to ensure smooth man-machine interface.

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