Altimeters

Question 1

_______ is an instrument that is used to indicated the height of the aircraft above a predetermined level (usually sea level)

These are ANEROID BAROMETERS (no liquid) that measure the absolute pressure of the surrounding air

Answer 1

Altimeter

Question 2

The altimeter requires a method to compensate for differences in pressure throughout the duration of the flight,

_______ (Kollsman) is used to adjust for pressure variations

Answer 2

Baro set knob

Question 3

By putting the current known air pressure (altimeter setting) into the Kollsman window (baro setting) using the baro set knob, the altimeter will indicate _______.

Answer 3

Actual attitude or INDICATED ALTITUDE

Question 4

Aircraft flying above 18,000 ft ASL must set their altimeter baro setting to 29.92 In Hg as shown in the Kollsman window

Altitude shown on the altimeter is called ______.

Answer 4

Pressure Altitude

Question 5

Aircraft flying below 18,000 ft ASL (above sea level) set their altimeter to the local altimeter setting as instructed by ATC (Air Traffic Control)

Altimeter provides an _______ above sea level

Answer 5

indicated altitude

Question 6

All aircraft flying above 18,000 ft MSL (mean sea level) use the same reference so any variances affect all aircraft equally, thus maintaining safe separation

Aircraft flying at these altitudes are operating at a _______.

Answer 6

flight level

Question 7

What is FL 310?

Answer 7

31,000 ft

Question 8

______ consists of two metals joined together at their interface to form a single strip.

One of the metals is invar, while the other metal may be brass or steel,

When the strip is subjected to an increase of temperature the brass or steel will expand, and conversely will contract when the strip is subjected to a decrease of temperature.

Answer 8

bimetal strip

Question 9

A ________ altimeter displays altitudes by means of a dial pointer and a three-digit drum counter (usually in the center).

Answer 9

counter drum

Question 10

Apart from indicating the altitude on an analogue dial face, an ________ also DIGITIZES and transmits the altitude information to the local aircraft transponder for transmission to the ground ATC when prompted.

Answer 10

encoder altimeter

Question 11

A ______ has a pressure sensing capsule connected to an ELECTRICAL pick-off assembly instead of a mechanical linkage. Can be fitted with an encoder

has a failure warning flag

Answer 11

servo altimeter

Question 12

For a radio altimeters, the transmission must travel to the ground and back so the frequency change per foot of airplane altitude is ______ Hz

Answer 12

20

Question 13

_____ altimeter that indicates altitude (height) of aircraft above the ground

Usable to an altitude of 2500 ft AGL and uses Uses radio signals to calculate altitude

Answer 13

Radio Altimeter

Question 14

Radio altimeter Transmission is a continuous wave, constant amplitude, frequency modulated carrier of ______ MHz.

Answer 14

4,300 mHz

Question 15

Radio altimeter has a deph modulation of ______ mHz

Answer 15

50 mHz

Question 16

Transmission of Radio alt varies between ______ and ______ MHZ

Answer 16

4,250 - 4,350mhz

Question 17

Transmission must travel to ground and back so freq change per foot of airplane altitude is ______ Hz (cycles)

Answer 17

20Hz

Question 18

Altimeters (Barometric) require testing every _____ months when used under IFR conditions or VFR within Class B,C, or D (transponder required) airspace

Answer 18

24 months

Question 19

The ________ receives the transmitted frequency, mixes the signal with the changing frequency (a difference), then sends the beat frequency to as a DC signal to the indicator.

Answer 19

receiver-mixer

Question 20

_______ can cause the needle not to represent actual altitude that it wants to displays. This is solved with vibrating the instrument.

Answer 20

Friction

Question 21

What kind of pressure variation does a barometer set knob indicates?

Answer 21

atmospheric pressure