Assembly & Rigging Mid Term

Bernoulli's principle concerns the flow of a fluid through a ___

Tube

Standard day atmospheric pressure at sea level is ____ pounds per square inch.

14.7

An airplane that tends to return to its original equilibrium after that equilibrium is disrupted has ___

Positive static stability

A tail rotor on a helicopter counteracts the ___ produced by the main rotor system.

Torque

Blade ___ solves the problem of dissymmetry of lift in helicopters.

Flapping

Speed indicates the rate of motion, but velocity denotes:

Both the speed of an object and the direction in which it is moving.

Newton's First Law of Motion begins, "Objects at rest tend to remain at rest and objects in motion tend to remain in motion at the same speed and in the same direction," and ends:

"unless acted on by an external force."

The cyclic pitch control lever in a helicopter:

The pitch of the blades, allowing the helicopter to move left, right, forward, or backward.

Autorotation is a flight condition where:

The main rotor blades are driven by the force of the relative wind passing through them rather than by the engine.

Name and define the three axis of an airplane.  Then name the type of movement around each axis, list the airplane controls that move each axis.

The three axes of an airplane are imaginary lines that pass through the aircraft’s center of gravity. Longitudinal, lateral and vertical axis. Each axis corresponds to a specific type of motion and set of controls: Longitudinal-Roll-Ailerons. Lateral-Pitch-Elevator. Vertical-Yaw-Rudder

While wing dihedral and wing incidence are not adjustable on most aircraft, these should be checked in the event of a ___ or if the aircraft has experienced ___

Hard landing, Abnormal flight loads

What is the difference between static balance and dynamic balance?

Static balance is when a control surface is balanced while at rest and does not tip up or down. Dynamic balance is when the control surface stays balanced during movement in flight.

What is the purpose of a nylon jacket on a control cable?

Correct

May be nylon coated to increase service life, protect from friction, keep
dirt and grit out, and dampen vibration this is called corrosion-resistant
steel (CRES) cable.

Why must a moveable flight control surface be balanced?

Control surfaces must be balanced to prevent flutter, reduce vibration, and ensure safe and stable flight.

Which of the following is true regarding putting safety wire on a bolt or nut?

All of the above.

The application and temperature environment recommended for a self-locking nut can be determined by which of the following methods?

The finish material on the nut.

What are the maximum number of threads that are allowed to be exposed outside of a turnbuckle?

3

Cable rigging charts compensate for which of the following conditions?

Different temperatures.

How should swage type terminal ends be checked for proper shank diameter after swaging?

Both Go-No-Go gauge and Micrometer

A swaged on control cable end is expected to be how strong as compared to the cable’s maximum rated breaking strength?

The swaged end should carry 60% of the cable’s rated breaking strength.

A control cable that is designated as a 7 x 19 would have what kind of construction?

Seven layers or bundles of wires with each bundle containing 19 individual strands of wires.

Which of the following is NOT a method of balancing a flight control?

Dynamic method

Which of the following control surface balance conditions is generally preferred by the aircraft manufacturers?

Overbalanced

In addition to the Type Certificate Data Sheets what other document or publication is required for properly assembling and rigging an aircraft?

The approved manufacturer’s maintenance manual

___ (0.020-inch diameter) should be used to seal equipment such as first-aid kits, portable fire extinguishers, emergency valves, or oxygen regulators.

Single Copper Wire