Engines - Previous Quiz

1. Which is NOT a type of valvetrain configuration?

• Overhead valve

• Overhead cam

• V-Type

• DOHC

1. Gasoline engines use spark ignition to ignite the fuel air mixture. Diesel engines use compression ignition, with no spark plug

• True

• False

During the intake stroke:

• The piston moves from BDC to TDC

• The spark plug fires

• The air-fuel mixture is compressed

• Exhaust gases are expelled from the cylinder

• None of the above

1. During the compression stroke:

• The piston moves from TDC to BDC

• The spark plug fires

• The air/fuel mixture is compressed, densifying the mix and increasing its temperature

• Exhaust gases are expelled from the cylinder

• None of the above

1. During the power stroke:

• Both valves are closed

• The intake valve is open

• The exhaust valve is open

• Both valves are open

1. The crankshaft rotates once. The camshaft rotates:

• Once

• Twice

• Half a rotation

1. Crankshaft throw is:

• The distance from connecting rod centreline to crankshaft main journal centreline

• Double the stroke

• Double the bore

• Both A and B

1. Where should cylinder out-of-round measurements be taken?

• Top of cylinder, parallel and perpendicular to crankshaft centreline

• 1. Bottom of cylinder, parallel and perpendicular to crankshaft centreline

• 1. Parallel to crankshaft centreline, at top and bottom of cylinder

• 1. Perpendicular to crankshaft centreline, at top and bottom of cylinder

1. The cross-hatch pattern on the cylinder’s walls are to:

• Prevent cylinder taper and out-of-round

• Increase the strength of the cylinder walls

• Hold a small film of oil on the cylinder walls

• Prepare the cylinder for sleeve installation

1. Normal cylinder wear will show some out-of-round. On which orientation of cylinder walls would you expect to find a larger diameter?

• 1. 45 degrees to the centreline of the piston pin

• 1. 90 degrees to the centreline of the piston pin

• Directly in line with the crankshaft centreline

• 90 degrees to the crankshaft centreline

• Both B and D