CPL Aircraft General Knowledge 3

Question 1

The primary cause of the lag experienced with a vertical speed indicator (VSI) is:

Accepted Answer

The time required for pressure changes to pass through the calibrated leak

Answer

Gyroscopic precession in the instrument mechanism

Answer

Friction in the mechanical indicator linkage

Answer

The inertia of the diaphragm capsule assembly

Question 2

When an altimeter is set to 29.92 in. Hg, the altitude displayed is:

Accepted Answer

Pressure altitude

Answer

True altitude above mean sea level

Answer

Density altitude corrected for temperature

Answer

Field elevation above sea level

Question 3

If the pitot tube becomes completely blocked (with static port open), the airspeed indicator will:

Accepted Answer

Act like an altimeter, increasing with climb and decreasing with descent

Answer

Drop immediately to zero

Answer

Remain fixed at the airspeed when blockage occurred

Answer

Fluctuate in proportion to turbulence

Question 4

The attitude indicator (artificial horizon) uses which gyroscopic principle to maintain its reference?

Accepted Answer

Rigidity in space

Answer

Gyroscopic precession

Answer

Coriolis effect

Answer

Tumbling tendency

Question 5

A heading indicator must be periodically synchronized with the magnetic compass because:

Accepted Answer

Gyroscopic precession and bearing friction cause gradual drift

Answer

Magnetic variation changes with aircraft heading

Answer

Airspeed changes affect gyro rotation speed

Answer

The Earth's magnetic field induces torque on the gyro

Question 6

The turn coordinator differs from the older turn-and-slip indicator in that it detects:

Accepted Answer

Both rate of roll and rate of yaw

Answer

Rate of yaw only, providing more accurate turn rate

Answer

Rate of roll only, providing earlier turn indication

Answer

Slip and skid without indicating turn rate

Question 7

With the static port completely blocked, what happens to the airspeed indicator as the aircraft climbs?

Accepted Answer

ASI reads higher than actual because frozen static is relatively high pressure

Answer

ASI reads lower than actual because pitot drops but static is frozen

Answer

ASI is unaffected since pitot pressure dominates the reading

Answer

ASI reads zero because no differential pressure is measurable