RK Bali, Air Navigation
ASI - Air Speed Indicator: DGCA Air Navigation questions
The airspeed indicator measures dynamic pressure, pitot minus static, calibrated to ISA sea level density. You correct it in steps: IAS to CAS for instrument and position error, CAS to EAS for compressibility, EAS to TAS for density.
The 96 questions split three ways: colour arcs and V speeds, pitot and static blockages in climb and descent, and the Mach meter. Exam papers have carried 18 of them.
Blockage effects run opposite ways. With pitot and drain blocked the ASI over-reads in a climb; with the static blocked it under-reads in a climb. The white arc runs from VS0 to VFE, the green from VS1 to VNO. The Mach meter has no temperature error, since it reads a pressure ratio.
0 answered·5 free questions·0 right
Question 1 of 5
Dynamic pressure is:
Question 2 of 5
The reason for having a square-law compensation in the airspeed-indicator mechanism is:
Question 3 of 5
A pitot tube covered by ice which blocks the ram air inlet will affect the following instrument(s):
Question 4 of 5
The Airspeed Indicator measures:
Question 5 of 5
If static source of ASI is blocked during level flight, ASI will.
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