INTERNAL COMBUSTION ENGINES QUIZ

43832

4

2

1

ηm = B.P/I.P

None of these

ηm = (B.P × I.P)/100

ηm = I.P/B.P

Efficiency ratio

Relative efficiency

Overall efficiency

Net efficiency

2 valves

1 valve

3 valves

4 valves

Enhance flow rate

Induce primary swirl

Induce secondary turbulence

Control air flow

Starts at top dead center and ends at bottom dead center

Starts at 30° before top dead center and ends at 50° before bottom dead center

Starts at 30° after top dead center and ends at 50° after bottom dead center

May start and end anywhere

Bigger than

None of the listed here

Smaller than

Same as

Fuel injection starts at 10° before top dead center and ends at 20° after top dead center

Fuel injection starts at just before top dead center and ends just after top dead center

Fuel injection starts at top dead center and ends at 20° after top dead center

May start and end anywhere

Capacitor

D.C. generator

Transformer

Magnetic circuit

0.5

0.3

0.15

0.7