Systems section 12

What component attaches to a connecting rod?

• crankshaft

• propeller

• camshaft

• intake valve

Which system is least efficient?

• the otto cycle

• two stroke engines

• four stroke engines

Which type of reduction gear system would change the direction of propeller shaft rotation?

• spur

• direct drive

• planetary

• worm

Aircraft piston engines convert _____ of the energy in the fuel into useful work.

• all
• less than 1/3

• 80%

• half

What is the strongest and heaviest component in an aircraft engine?

• piston

• crankshaft

• cylinder

• camshaft

Which component rides on the cam lobe?

• hydraulic lifter

• valve spring

• push rod

• rocker arm

The camshaft spins at ____ the crankshaft.

• one half the speed of
• the same speed as

• twice the speed of

The shape and position of the _____ time the opening and closing of the exhaust and intake valves.

• cam lobes
• connecting rods

• crankshaft journals

• compression rings

The piston engine's carburetor is generally located

• before the intake manifold
• after the intake manifold

• after the exhaust manifold

Where is the combustion chamber located?

• below the crankshaft

• above the crankshaft

• in the crankcase

• in the cylinder