a) Block
b) Piston
c) Muffler
d) Crankshaft
2. Engine crankshafts are usually made of ____ or _______.
solid alloy and carbon steel
3. What is the function of crankshaft?
a) It guides piston movement
b) Changes the reciprocating (up and down) motion of piston and rod into useful rotary (spinning) motion.
c) Transfers the energy of combustion to the connecting rod.
d) Controls the opening of the valves.
4. Crankshaft fits into the ____ of the engine block.
a) Bottom
b) Upper
C) Middle
d) Offset
5. Crankshaft rod journals are.
a) In line with the main journals
b) Offset from the main journals
c) Fit into the block main bearings
6. With the engine running, the rod journals circle around the ____ of the crank.
a) Centerline of the crank
b) Offset of the crank
7. What is the function of crankshaft counterweights?
a) To prevent vibration and damage of crankshaft.
b) Smooth engine operation
c) Harness the force produced by the down word thrust of the piston
d) All the above
8. A _____ bearing is designed to be used or a crankshaft. Journal that has been machined to a smaller diameter.
a) Main bearing
b) Undersize bearing
9. Journal wear, main bearing wear, rod bearing wear, and resenting low oil pressure relates to _____ praline.
a) Crankshaft problems
b) Camshaft problems
c) Connecting Rod problems
10. Excessive crankshaft and play is caused by _________.
a) Worn main bearing
b) Worm main thrust bearing
c) Rod bearing wear
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