Module 16 Piston Engines: Cooling, Intake & Exhaust

1) To ascertain uniform cooling of fins
a) variable shutters are used
b) deflectors are used
c) oil coolers are used

2) The cylinder head temperature of an air cooled engine could be controlled by
a) cowling gills
b) air deflectors
c) a radiator

3) Air cooled engines are _________ , to present a larger cooling surface to the air flow
a) ducted
b) shrouded
c) finned

4) To compensate for poor scavenging of the exhaust gases at slow running
a) the mixture is enriched
b) the mixture is weakened
c) valve timing is changed

5) An unsupercharged carburetor manifold pressure is governed by
a) atmospheric pressure and throttle position
b) atmospheric pressure
c) throttle position

6) To maintain ________ _______ at sealevel conditions a supercharger is used
a) duct pressure
b) manifold pressure
c) fuel pressure

7) Manifold and boost pressure are measured between
a) manifold and throttle valve
b) throttle valve and engine inlet valve
c) throttle valve and manifold

8) A normally aspirated engine climbing from Sea Level to 20,000 ft altitude, at constant RPM,
will loose approximately ______ of the maximum power available
a) 50%
b) 30%
c) 25%

9) The waste gate position is determined by a controller that is sensitive to the turbocharger discharge
a) pressure and mass
b) pressure and volume
c) pressure and density

10) When increasing power with a turbo charger, care must be taken to prevent
a) too high manifold pressure
b) bootstrapping
c) over-boosting

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