Why are IIT (Image Intensifier Tubes) used in HMD?

Aeronautical & Aerospace Engineering : Avionics - Quiz(MCQ)

Terrain mapping

Clarity of outside world scene

Provide night vision capabilities

Compensation for parallax errors

Correct Answer : Provide night vision capabilities

Explanation : IIT is an image intensification device which complements the infrared viewing system by providing night vision. The image form the Image Intensifier Tube is a phosphor screen which emits green light in the centre of the visual band where the eye is most sensitive.

Recently Updated in Avionics Questions

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

True

False

Can Not Say

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.

True

False

Can Not Say

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?

System that is not fully voice commanded

Systems that can recognize anyone’s voice

Systems that require a pause between each word to recognize

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.