Regarding a normally aspirated piston engine, which of the following statements is correct?

POWERPLANT PISTON 1

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Education
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Professional Development
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Medium
wafi sabab
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8 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Power output depends, amongst other things, on the mass of the mixture entering the cylinder.
Power available will increase with altitude.
High atmospheric humidity increases power.
Power available will increase with density altitude.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Refer to figure.
On the diagram showing the power output of a piston engine as a function of mixture ratio, theoretical best economy is shown at...
5
2
3
4
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The formula to calculate the total displacement of a multi-cylinder piston engine is...
piston area x piston stroke.
cylinder length x cylinder diameter.
piston area x piston stroke x number of cylinders.
cylinder volume x number of cylinders.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If the manifold pressure gauge of a piston engine shows an increase shortly after carburettor heat is turned on, it indicates that...
excessive heat is being used.
ice was forming in carburettor.
the mixture was too lean.
the cylinder walls are overheating.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which statement(s) is/are true?
I. Fuel injections of the engines can not freeze
II. Carburetor freezing often occurs at 5°C to 20°C and at higher temperatures
I is incorrect, II is correct.
I is correct, Il is incorrect.
I is correct, II is correct.
I is incorrect, II is incorrect.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The oil is stored underneath the engine, with NO external reservoir and a higher oil capacity. Which type of oil system is being described?
Wet sump.
Dry sump.
Neither system is being described.
Both systems may be being described.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The main reason for opening the cowl flaps is to control the...
oil temperature
C.H.T. (cylinder head temperature)
cabin temperature
E.G.T (exhaust gas temperature)
8.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
An impulse magneto coupling in a piston engine...
advances ignition timing and gives a hotter spark at starting.
gives an automatic spark increase during high-speed operation.
reduces magneto speed during engine warm-up.
retards the spark during engine starting.
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