Standard Practices 5

What is the purpose of an inverter?. Changes DC into AC. Changes AC into DC. Helps DC for power supply. Helps AC for power supply.

The ability of a material to be bent, formed or shaped without cracking or breaking is called?. Toughness. Hardness. Ductility. Malleability.

What is the term used for a metal to be drawn into wire stock, extrusions or rods?. Malleability. Ductility. Hardness. Toughness.

How many threads are to be showing after a turnbuckle is tightened to proper tension?. 1. 2. 3. 4.

What are the two classes of threads given to AN fitting?. Tube and Pipe. Threadless and Tubeless. Swaged and Un-swaged. Open and Close.

What type of o-ring is used with a synthetic based hydraulic fluid?. Butyl synthetic rubber. Polyvinyl chloride rubber. Natural rubber. Neoprene or Buna-N.

What would you use to flush a mineral based hydraulic fluid?. Varsol. Boric acid. Alcohol. MEK.

What colour is vegetable based hydraulic fluid?. Purple. Red. Green. Blue.

A tensile strength of 70,000, is measured as?. 70 psi. 70 lbs/sq.ft. 70 KSI. 700 KSI.

What is nitriding?. Casehardens part for increased wear with carbon added to the surface of the part. Casehardens part for increased wear resistance, part is heat-treated beforehand, no quenching required with minimal distortion. Is a form of removing internal stresses set up by heat treatment. Metal is heated just above a critical point, soaked at that temperature and cooled very slowly in a furnace.

A type of heat treatment of aluminum alloy that may not lock the grain structure together very well and may setup conditions for intergranular corrosion is called?. Age hardening. Precipitation hardening. Strain hardening. Solution heat treatment.

When two pieces of metal are joined with a single line of rivets, what should the load be?. Torsional. Compression. Tension. Shear.

What type of corrosion is created when two joined pieces of metal are allowed to move?. Fretting corrosion. Filiform corrosion. Friction corrosion. Fatigue corrosion.

What is meant by a 7 X 19 cable?. A cable with 7 strands with each strand having 19 wires. A cable with 7 wires with each wire having 19 strands. A cable with 19 wires with each wire having 7 strands. A cable with 19 wires with each wire having 17 wires.

What is the only suitable lubricate to use on an oxygen line fitting?. Beeswax. Teflon tape. Hydraulic fluid. AV grease.

What must be considered when choosing the gauge of wire to use in a particular electrical circuit?. The current carrying ability and the voltage drop. The voltage drops and the mechanical strength of the wire. The type of electrical system and the resistance of the current return path through the aircraft. The estimated or measured conductor temperature and weather the wire is installed in conduit and/or a bundle.

What is a joggle?. An offset formed on a sheet metal strip to allow clearance for another sheet or extrusion. An offset to allow proper sealant application. An offset to allow rivets to make a gap between material. Added design to make material look good.

Holes drilled in acrylic plastic should be made using?. A unibit (or twist bit with an included angle of approx. 150°). A twist bit with an included angle of 90°. A carbide drill bit. A reamer with pilot.

If a cable is spliced and nico-pressed, the repair strength compared to the cable is?. 100%. 75%. 50%. 85%.

What are two metals that control cables are made of?. Corrosion resistant steel and carbon steel. Stainless steel and carbon steel. High grade carbon steel with a nickel coating. High grade carbon steel with a silver coating.

What tool would you use to find the center of round stock?. Combination set. Dial indicator. Outside calipers. Hermaphrodite calipers.

What is the main factor in deciding the size of welding tip to use for oxyacetylene welding?. Thickness of the material to be welded. The size of the filler rod. The amount of pressure from the tank. The edge distance (gap) of the two materials to be joined.

What is the main factor in the type of rod to use?. Thickness of the material to be welded. Size of material to weld. The size of the filler rod. Type of material to be welded.

Silver soldering is a form of?. Brazing. GTAW. Spot welding. Gas tungsten weld.

Steel is best hardened by quenching in?. Oil. Air. Sand. Soap solution.