FAA Flight Instrument Test 1

Question 1

If the pitot tube and outside static vents become clogged, which instruments would be affected?

Accepted Answer

The altimeter, airspeed indicator, and vertical speed indicator.

Answer

The pitot-static system provides crucial pressure inputs to several flight instruments. The pitot tube supplies ram air pressure to the airspeed indicator, while the static vents provide ambient atmospheric pressure to the airspeed indicator, altimeter, and vertical speed indicator. Therefore, a blockage in both the pitot tube and static vents would render all three of these instruments inoperative or provide erroneous readings.

Question 2

Which instrument will become inoperative if the pitot tube becomes clogged?

Accepted Answer

Airspeed.

Answer

The pitot tube is specifically designed to measure ram air pressure, which is the dynamic pressure created by the aircraft's forward motion. This ram air pressure is then compared with static pressure to determine airspeed. If the pitot tube becomes clogged, the airspeed indicator will lose its primary pressure source and become inoperative or display incorrect readings.

Question 3

Which instrument(s) will become inoperative if the static vents become clogged?

Accepted Answer

Airspeed, altimeter, and vertical speed.

Answer

The static vents provide ambient atmospheric pressure to the altimeter, vertical speed indicator, and the static side of the airspeed indicator. If these vents become clogged, the altimeter will freeze at the altitude where the blockage occurred, the vertical speed indicator will read zero, and the airspeed indicator will provide erroneous readings because it relies on both pitot and static pressure for accurate operation.

Question 4

Altimeter 1 indicates

Accepted Answer

10,500 feet.

Answer

Altimeters typically have three hands: a short, thick hand for thousands of feet, a long, thin hand for hundreds of feet, and a very thin hand for tens of thousands of feet. For Altimeter 1, the very thin hand points to 1 (indicating 10,000 feet), the short, thick hand points to 0 (indicating 0 thousands), and the long, thin hand points to 5 (indicating 500 feet). Combining these gives 10,000 + 500 = 10,500 feet.

Question 5

Altimeter 2 indicates

Accepted Answer

14,500 feet.

Answer

For Altimeter 2, the very thin hand points to 1 (indicating 10,000 feet), the short, thick hand points to 4 (indicating 4,000 feet), and the long, thin hand points to 5 (indicating 500 feet). Summing these values gives 10,000 + 4,000 + 500 = 14,500 feet.

FAA Practice Test

FAA Practice Test

FAA Flight Instrument Test 1