Nelnet Army Aviation Information Test

Question 1

A lighted heliport may be identified by

Answer 1

a green, yellow, and white rotating beacon

Question 2

The primary purpose of the tail rotor system is to

Answer 2

counteract the torque effect of the main rotor

Question 3

During a hover, a helicopter tends to drift in the direction of the tail rotor thrust. This movement is called

Answer 3

Translating Tendency

Question 4

The upward bending of the rotor blades resulting from the combined forces of lift and centrifugal force is known as

Answer 4

Coning

Question 5

In a helicopter, the center of gravity (CG) range is usually located

Answer 5

A short distance fore and aft of the main rotor mast

Question 6

The lift differential that exists between the advancing main rotor blade and the retreating main rotor blade is known as

Answer 6

Dissymmetry of lift

Question 7

Ground resonance is most likely to develop when

Answer 7

A series of shocks causes the rotor system to become unbalanced

Question 8

The proper action to initiate a quick stop is to

Answer 8

Lower collective pitch and apply aft cyclic

Question 9

Takeoff from a slope in a helicopter with skid-type landing gear is normally accomplished by

Answer 9

Bringing the helicopter to a level attitude before completely leaving the ground

Question 10

The proper procedure for a slope landing in a helicopter with a skid-type landing gear is

Answer 10

When parallel to the slope, slowly lower the upslope skid to the ground prior to lowering the downslope skid

Question 11

Density altitude refers to a theoretical air density that exists under standard conditions at a given altitude. Standard conditions at sea level are

Answer 11

29.92 in Hg (inches of mercury) and 15 degrees Celsius

Question 12

A helicopter pilot should consider using a running takeoff

Answer 12

When gross weight or density altitude prevents a sustained hover at normal hovering altitude

Question 13

Foot pedals in the helicopter cockpit enable the pilot to

Answer 13

Control torque effect

Question 14

If the helicopter is moving forward, the advancing blade will be in the

Answer 14

Right half of the rotor disc

Question 15

The method of control by which the pitch of all main rotor blades is varied equally and simultaneously is the

Answer 15

Collective pitch control

Question 16

The combination of factors that will reduce helicopter performance the most is

Answer 16

High altitude, high temperature, and high humidity

Question 17

The most favorable conditions for helicopter performance are the combination of

Answer 17

Low-density altitude, light gross weight, and moderate-to-strong winds

Question 18

Chord Line
|
|
–> Relative Wind

Answer 18

Angle of Attack

Question 19

During surface taxiing, the helicopter pilot should use the pedals to maintain heading and the cyclic to maintain

Answer 19

Ground track

Question 20

The thinner air of higher altitudes causes the airspeed indicator to read “too low.” An indicated airspeed of 80mph at 5,000 feet is actually a true airspeed of approximately

Answer 20

88 mph

Question 21

How does blade rotation create lift?

Answer 21

Laminar flow of air molecules generates a low pressure area above the rotating airfoils relative to under.

Question 22

How does raising the collective change the angle of attack (AOA) and center of pressure (CP)?

Answer 22

The relative wind to chord line angle increases, and the CP above the blade moves forward

Question 23

Without changing your altimeter, your true altitude in flight will

Answer 23

Increase with increases in pressure

Question 24

Changing an altimeter from 29.85 to 30.00 is what apparent change in elevation or altitude?

Answer 24

150 feet increase

Question 25

Ground effect is best described as

Answer 25

Induced lift caused by decreases in drag due to ground disruption of airfoil upwash, downwash, and blade tip vortices

Question 26

Assuming no-wind, describe the aerodynamic forces required for stationary hover

Answer 26

Thrust and lift act in the same vertical direction and are both equal to a combined weight and drag

Question 27

What are the Newton laws of motion

Answer 27

• A body at rest will remain at rest and a body in motion will remain in motion
• Acceleration is a change in magnitude or direction of the velocity vector with respect to time
• For every action, there is an equal and opposite reaction
• The force required tor produce a change in motion is directly proportional to its mass and rate of change in velocity

Question 28

What airfoil terminology defines the downward flow of air?

Answer 28

Induced flow

Question 29

What changes rotational pitch of the rotor blades?

Answer 29

Cyclic pitch control

Question 30

What is the function of foot pedals in a helicopter?

Answer 30

To move the aircraft about the vertical axis

Question 31

What is an airspeed indicator (ASI) indication of a clogged static port?

Answer 31

ASI will indicate slower than actual speeds on climbs and faster on descents

Question 32

During a forward autorotation, the inner 25 percent of blade region is referred to as the

Answer 32

Stall region

Question 33

Which of the following is NOT a factor for weight and balance calculations?

Answer 33

Angular momentum

Question 34

Tactical terrain flight at night up to a level of 25-feet-tall trees and obstacles is called what?

Answer 34

Nap-of-the-earth (NOE) flight

Question 35

Which of the following is NOT a consideration when using NVGs?

Answer 35

Objects with poor reflective surfaces such as wires and suspension lines are easier to see

Question 36

What is a Fenestron?

Answer 36

An anti-torque rotor that uses forced air through slots and rotating nozzle (protected tail rotor)

Question 37

What is not an effect of ice build-up on your airfoil?

Answer 37

Decreased AOA

Question 38

What chart uses a 1:500,000 scale?

Answer 38

Sectional aeronautical charts

Question 39

What happens when you push forward on cyclic pitch in a two-bladed rotor system?

Answer 39

Gyroscopic precession exposed to differing blade AOA occurns 90 degrees from stick deflection

Question 40

What control surfaces are manipulated to initiate a left roll in a fixed wing aircraft?

Answer 40

Left aileron moves down, right aileron moves up