general written pt4

During discharge, a nickel caddium battery will show a lower liquid level than when at full charge,Because?

The electrolyte becomes absorbed into the plates.

Tetraethyl lead is added to aviation gasoline to.

Improve the gasoline's performance in the engine.

Why would a water break test be conducted??

To make certain that a bare metal surface is thoroughly clean.

A primary cause of intergranular corrosion is

Improper heat treatment

A solvent that is recommended for wipe down of clean surfaces just before painting.

Aliphatic naptha

Generally speaking, bolt grip lengths should be

Equal to the thickness of the material which is fastened together.

Which material cannot be heat treated repeatedly without harmful effects.?

Clad aluminum alloy

The useful load of an aircraft consists of the..

Crew, usable fuel, passengers and cargo

What is the most satisfactory extinguishing agent for use on a carburetor or intake fire.

Carbon dioxide

How is a flooded engine, equipped with a float type carburetor, cleared of excessive fuel?

You will crank the engine with the starter or by hand, with the mixture control in cut off, Ignition switch off and the throttle fully open until the fuel charge has been cleared.

Which is the ratio of the water vapor actually present in the atmosphere to the amount that would be present if the air were saturated at the prevailing temperature And pressure?

Relative humidity

What is meant by the term residual fuel

The fuel remaining in the tanks ,lines and engine before draining

What tool is generally used to calibrate a micrometer or checks its accuracy??

Gauge block

The purpose of aircraft wing diedral is to

Increase lateral stability

The temperature to which humid air must be cooled at constant pressure to become saturated is called…

Dewpoint

When an anodized surface coating is damaged in service, the same it can be partially restored by

Chemical surface treatment

Circular magnetization of a part can be used to detect which defects?

Defects parallel to the long Axis of the part.