The Vertical Speed Indicator: DGCA Air Navigation questions

Question 1

The advantage of having the VSI dial presentation in logarithmic spacing rather than in linear spacing is that:

Accepted Answer

At low rates of climb or descent the pointer movement is much larger and so is more easily read

Answer

Readings are instantaneous

Answer

A greater range of rates of climb and descent is shown

Answer

The internal mechanism is simplified by deletion of the calibration choke

Question 2

In the IVSI, lag error:

Accepted Answer

Is overcome by using a special dashpot accelerometer assembly

Answer

Is overcome by feeding a sample of static pressure to the case and delaying it to the capsule

Answer

Is overcome by the use of logarithmic presentation

Answer

Is only overcome when initiating a climb or descent

Question 3

Because the VSI measures rates of change of static pressure and not actual values of static pressure, position error:

Accepted Answer

May cause errors in the VSI during the take-off run

Answer

Never affects VSI indications

Answer

May cause errors in VSI indications whenever airspeed is changed

Answer

May cause errors in VSI indications whenever airspeed is changed, even if there is no change in position error

Question 4

When entering a steep turn, an IVSI is likely to show:

Accepted Answer

A climb

Answer

No change in altitude

Answer

A descent

Answer

A slight descent at high airspeed only

Question 5

If the static vent becomes blocked during a climb:

Accepted Answer

The VSI will return to zero

Answer

The VSI will stop at the rate of climb of the aircraft at the time of blockage

Answer

The VSI will indicate a decreasing rate of climb

Answer

The VSI will indicate an increasing rate of climb

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