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Powerplant Oral ASA QUESTIONS WITH VERIFIED CORRECT ANSWERS

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Powerplant Oral ASA QUESTIONS WITH VERIFIED CORRECT ANSWERS Powerplant Oral ASA QUESTIONS WITH VERIFIED CORRECT ANSWERS

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Powerplant Oral ASA
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What is the main smaller frontal area and easier to streamline.

advantage of a

horizontally opposed

engine over a radial

engine for powering

modern aircraft?


How many throws are six

there in the crankshaft of a

six-cylinder horizontally

opposed engine?


What kind of connecting a master rod connects the single throw of the

rod arrangement is used in crankshaft with a piston. all other pistons are

a radial engine? connected to the master rod with link rods


Of what material are most grey cast iron

piston rings made?


What is the reason for keep all of the clearance out of the valve operating

using hydraulic valve mechanism, decreases wear of valve train

lifters in an aircraft components

engine?


At what speed does the camshaft is one half the speed of crankshaft

camshaft turn, relative to

the crankshaft speed in a

horizontally opposed

engine?

, What kind of main steel backed lead alloy bearings

bearings are used in a

horizontally opposed

engine?


On what stroke is the exhaust

piston of a reciprocating

engine when the intake

valve begins to open?


On what stroke is the power

piston of a reciprocating

engine when the exhaust

valve begins to open?


Why are both the hot and hot clearance is for valve timing. timing adjusted with

cold valve clearances valves in cylinder 1 set with hot clearance then

given for most radial adjusted to cold clearance

engines?


A piston that is not perfectly round. . When the piston
What is meant by a cam-
reaches operating temperature, the metal expands
ground piston
enough that the piston becomes perfectly round.


Where is the piston in a before top dead center on the compression stroke

reciprocating engine

when the ignition spark

occurs?


What is meant by a full- pin not clamped in either piston or connecting rod

floating wrist pin?


Why do most aircraft for different frequencies/rpms

reciprocating engines use

more than one spring on

each valve?


Would excessive valve open late close early

clearance cause the

valves to open early or

late?

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