WorksheetsInstruments
Total questions: 55
Worksheet time: 28mins
Name
Class
Date
1.
Write down equation for dynamic pressure
a)
2 . rho . v2
b)
½ . rho . v2
c)
½ . rho . V
2.
The dynamic pressure is measured as the difference between…………….pressure and………….pressure
a)
Total, static
b)
Dynamic, static
c)
Total , dynamic
3.
Write down the equation for total pressure (PT)
a)
PT = Ps - ½ x rho x v2
b)
PT = Ps + 2 x rho x v2
c)
PT = Ps + ½ x rho x v2
4.
Total pressure is measured by………..
a)
static tube
b)
static ports (or vents)
c)
pitot tube
5.
Altimeter is fed with………..pressure
a)
static
b)
dynamic
c)
total
6.
VSI is fed with……..
a)
dynamic pressure
b)
static pressure
c)
total pressure
7.
Red line on the ASI face indicates……….airspeed
a)
Vmax power on
b)
VNE power on
c)
VNE power off
8.
When the pitot tube is blocked, the ASI……in climb at constant speed
a)
underreads
b)
exact
c)
overreads
9.
When the static port is blocked, the ASI ………..in climb at constant speed
a)
underreads
b)
exact
c)
overreads
10.
Indicated altitude is shown on altimeter when the altimeter is set to
a)
QFE
b)
QNE
c)
QNH
11.
Gyroscopes have two properties:
a)
Rigidity in space
b)
Precession
c)
Rigidity in space, Precession
12.
In helicopters, mostly………gyroscopes are used
a)
airfun
b)
electrical
c)
mechanical
13.
Turn coordinator gyro shows:
a)
Rate of theclimb of aircraft about the turning or normal axis.
b)
Rate of the movement of aircraft about the turning or normal axis.
c)
Rate of the descent of aircraft about the turning or normal axis.
14.
The attitude indicator indicates…….and………
a)
pitch, bank
b)
yaw, pitch
c)
bank, yaw
15.
The attitude gyro retains its rigidity relative to the
a)
Earth’s horizontal
b)
Earth’s vertical
c)
Earth’s space
16.
Direction indicator gyro spin axis is aligned parallel to……….of the helicopter
a)
vertical plane
b)
Earth’s plane
c)
horizontal plane
17.
The attitude gyro suffers from minor errors during……….and………
a)
bank, turns
b)
pitch, bank
c)
acceleration and deceleration, turns
18.
Mechanical drift of the direction indicator is due to……….and……….
a)
friction, mechanical imperfections
b)
friction, electrical imperfections
c)
I don´t know
19.
Density altitude is pressure altitude corrected for……….
a)
non-standard pressure
b)
non-standard temperature
c)
non-standard density
20.
When the alternate static source is activated(in upressurized aircraft), the system is fed with a static pressure which is slightly……...than the outside pressure
a)
higher
b)
center
c)
lower
21.
Static pressure ……...with altitude
a)
drops
b)
rises
c)
constant
22.
Dynamic pressure ……...with airspeed and ……..with density
a)
rises, rises
b)
rises, dropes
c)
dropes, rises
23.
Write down the equation for total pressure
a)
PT=q-PS
b)
PT=q/PS
c)
PT=q+PS
24.
Static pressure is measured by ………
a)
dynamic ports (or vents)
b)
static ports (or vents)
c)
pitot tube
25.
Airspeed indicator is fed with……..and……..
a)
dynamic pressure, static pressure
b)
total pressure, static pressure
c)
total pressure, dynamic
26.
The diaphragm (or capsule) in the ASI is fed with………...while the housing of the ASI is fed with…………
a)
total pressure, dynamic
b)
dynamic pressure, static pressure
c)
total pressure, static pressure
27.
Red and white cross-hatched line on the ASI face indicates……..airspeed
a)
VNE power-off
b)
Vmin power-off
c)
Vmax power-off
28.
When the pitot tube is blocked, the ASI ………..in descent at constant speed
a)
overreads
b)
exacts
c)
underreads
29.
When the static port is blocked, the ASI ……….in descent at constant speed
a)
exacts
b)
overreads
c)
underreads
30.
Pressure altitude is shown on altimeter when the altimeter is set to……..
a)
990 hPa
b)
1013 hPa
c)
1001 hPa
31.
A gyroscope tends to …………...its orientation in space
a)
push
b)
pull
c)
maintain
32.
Describe what gyroscopic precession is
a)
Any force applied to a gyroscope’s rim will show its effect 90 degrees later in direction of rotation of the gyroscope
b)
Any force applied to a gyroscope’s rim will show its effect 45 degrees later in direction of rotation of the gyroscope
c)
Any force applied to a gyroscope’s rim will show its effect 0 degrees later in direction of rotation of the gyroscope
33.
Vacuum gyroscopes have ……….. RPM when compared to electrical gyroscopes
a)
lower
b)
higher
c)
same
34.
Attitude indicator’s gyro axis of rotation is kept aligned parallel with………
a)
Earth’s same plane
b)
Earth’s horizontal plane
c)
Earth’s vertical plane
35.
The attitude gyro suffers from minor errors during………and………
a)
bank, turns
b)
acceleration and deceleration, turns
c)
climb and descent, turns
36.
If not slaved to the flux valve, the Direction indicator has to be aligned with ………...once in a while (approx 15 minutes)
a)
magnetic compass
b)
AFD
c)
GPS
37.
Apparent drift of the direction indicator is due to………and……….
a)
Earth’s lattitude, movement of the helicopter across the globe
b)
Earth’s longitude, movement of the helicopter across the globe
c)
Earth’s rotation, movement of the helicopter across the globe
38.
What is height?
a)
Horizontal distance from obstacles (ground)
b)
Vertical distance to clouds
c)
Vertical distance from obstacles (ground)
39.
Density altitude is pressure altitude corrected for
a)
non-standard temperature
b)
non-standard pressure
c)
non-standard density
40.
The static pressure is fed into the………...of the altimeter
a)
flat
b)
housing
c)
tube
41.
Magnetic compass points to ……...north
a)
standard
b)
magnetic
c)
true
42.
Errors of magnetic compass due to aircraft structure and electrical loads are called………
a)
deviation
b)
inclination
c)
declination
43.
The Earth’s magnetic horizontal field enables compass to ……….
a)
show heading
b)
show nothing
c)
show direction
44.
Magnetic compass is not very reliable above 60N or 60S of latitude due to…………
a)
static dip
b)
magnetic errors
c)
magnetic dip
45.
Magnetic compass acceleration errors are most apparent when accelerations in an ………..directions
a)
northly or soutly
b)
easterly or westerly
c)
every direction
46.
In the northern hemisphere, the acceleration error of a magnetic compass shows an apparent turn to the ……………
a)
north
b)
south
c)
depend on speed
47.
The compass ……...when turning to the north on northern hemisphere
a)
overreads
b)
exact
c)
underreads
48.
A magnetic float type system ……………susceptible to changes in speed, attitude and temperature
a)
is
b)
isn´t
49.
A magnetic compass ……...electricity to function properly
a)
require
b)
does not reqire
50.
Magnetic materials ……….be placed near to magnetic compass
a)
may
b)
maybe
c)
may not
51.
Earth’s magnetic field vertical component makes the compass to show …………
a)
to dip
b)
to north
c)
to south
52.
In the northern hemisphere, the deceleration error of magnetic compass shows an apparent turn to the……….
a)
north
b)
south
c)
west
53.
Turning errors of the magnetic compass are most apparent in……...directions
a)
easterly or westerly
b)
northerly and southerly
c)
up and down
54.
Capacitance fuel system …………..susceptible to changes in speed, attitude and temperature
a)
is
b)
maybe
c)
is not
55.
When the ammeter shows 0 in flight, ……...is the most probable cause
a)
engine failure
b)
alternator (or generator) failure
c)
skid problem
100 %
