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-

Pressure Instruments [

10)

Question

89

in database)

An altimeter:

a) contains a barometric capsule, connected to a total pressure source, that contracts during a

descent.

b)

contains a

capsule that expands during a descent.

c) consists of a n s t r u m e n t case connected to a static pressure source. The instrument

case contains a seal , partIailGevar;uate-d

aneroid capsule which

contracts

during

a

descent.

- l l ' \Uw

d

contains a partially evacuated capsule that expa

[lds

during a descent.

The correct answer is c V

Question

296

in database)

To calculate Rectified Air Speed or Calibrated Air Speed) from Indicated Air Speed, account

must be taken of:

b) position error.

: ~ ~ : G ~ - ~ l

AGS'

c) temperature error.

d

instrument and position error.

The correct answer is d.

Question 90 in database)

In icing conditions, if a static

vent became

blocked

during

level flight and

the

aircraft

subsequently climbed, the readings

on

the Altimeter,

the VS

I and the

AS

I

would

:

Altimeter

VSI ASI

a) remain unchanged

,

remain unchanged

under-read

u n d e r ~ e a d

c) under-read

\-=--;,,-_ A

GS

remam n

Cii

anged

d

over-read over-read

unde

r ead

The correct answer is a.

Question 88 in database)

If an unpressurised aircraft has an alternate static source within the cockpit, the alternate static

pressure:

'I m b, d ; Y Ih ' ;, Y

' ct ;on

of ~ S d

'nd;,,'oc

b) will be higher

t i T d ~ ~ L o g r c e .

c) will be unreliable because

of

ingress

of

moisture from the pitot

d

will be lower than the outside static source.

The correct answer is d.

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Question 84 (in database)

When an aircraft is in flight, the pressure sensed by the forward facing hole in the pitot tube is:

a) static pressure

only.

b) total r s s u dynamic pressure.

c) dynamic press " Ius static pressure.

,

,

d) dynamic pressure only.

The correct answer is c.

G-1AGS

Question

86

(in databasE )

If, during descent, the static sources to the airspeed indicator and altimeter become blocked by

ice

I

(,

A tm

will nvp.r-rl' ::lrl

"'Inn

thp.

::lltimp.tR

r will mrlp.r_p < ln .

,

,

b) the airspsed indicator will u

: :

d'

c)

both instruments will over-read.

d) both instruments will under-read.

The correct answer

is c.

Question 91 (in database)

d the altimeter will over-read.

If the power s u p p l ~ to the pitot heater failed during flight in icing conditions and the aircraft

subsequently descended, the readings on the Altimeter, the VSI and the ASI would, if ice had

blocked the pitot

(Total

Pressure) tube:

Altimeter VSI ASI

a) read under-read

b) under-read

c) read Correctly read Correctly over-read

d) read Correctly read Correctly

under-read

The correct answer

is

d.

Question

85

(in database)

The principle

of

operation

of

the Vertical Speed Indicator (VSI)

is

that it:

a) compares static pressure in a capsule, sensed through a direct static vent, with that in the

instrument's case, sensed though a metered vent. The VSI is, thus, able to detect the rate

of

change

of

static pressure with height.

b) compares total

p

from the pitot tube with static pressure from the static vents. The VSI

is calibrated to show e differe

ca

between the two as a vertical speed in feet per minute.

c) compares dynamic pressure{fro P

~

tube with static pressure from the static vents. The

VS I is calibrated to show the difference betweenthe two as a vertical speed in feet per minute

or metres per second.

d) senses total pressure only, from the pitot tube, and converts the change

in

total pressure with

height into a rate of climb

or

descent, measured either in feet per minute

or

metres per second.

The correct answer is a.

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Question

87

in database)

Ignoring any I

ns

trument or Position Errors,

in

what conditions will the Air Speed Indicator

indicate the T

rue

Airspeed of

an

aircraft?

a) In ISA, sea-Ieyel conditions only.

b At

any

l t i t u

p e r a t u r e

c) At any altitude, ,.

i Ide