metallic
In gas welding, the amount of heat applied to the material being welded iss controlled by the ________
Size of the tip opening
Fungicide & mildewicide additives are important for fabric covered A/Cs, such as ________
Cotton & linen
Excessive valve clearances will cause the duration of valve opening to __________
Decrease for both intake and outtake
Turbine blades are generally more susceptible to operating damage than the compressor blades because of _______
Exposure to high temperatures
When bending metal, the material on the outside of the curve stretches while the material on the inside of the curve compresses what part of the metal?
That part of the material which is not affected which is not affected by either stress is the
When balsa wood is used to replace a damaged honeycomb core, the plug should be cut so that _______
The grain is perpendicular to the skin
What is the purpose of the safety circlet installed on some valve stems _________
To prevent valves from falling into the chamber
The velocity of subsonic air as it flows through a convergent nozzle __________
increases
What should engine mount members be repaired with?
Larger diameter tube with fish mouth and rosette welds
superficial scars, scratches, surface abrasions, or rain erosion on fiberglass laminates can generally be repaired by applying ______
One or more coats of resin
What is the advantage of using metallic-sodium filled exhaust valves in the aircraft reciprocating engines _________
Reduce valve operating temperatures.
What are the two functional elements in the centrifugal compressor ________
Impeller and diffuser
When a piece of aluminum alloy iss to be bent using a minimum for the type and thickness of material ________
The layout should be made so that the bend will 90 degrees to the grain of the sheet
What reference tool is used to determine how the fiber is to be oriented on a ply of fabric?
Warp clock
During ground check an engine is found to be rough-running, the magneto drop is normal, and the manifold pressure is higher than normal for any given rpm. The trouble may be caused by ___________
A dead cylinder
What type of ignitor plug is used in the low tension ignition system of an aircraft turbofan engine?
Self-ionising or shunted-gap type plug