Question

Two technicians are discussing the lower-end operation of an engine. Technician A says that power loads result from the expansion of burning gases during the combustion process that push down on the piston and turn the crankshaft. Technician B says that when the connecting rod is pulling the piston down from TDC (top dead center), the piston weight plus any ring friction and skirt drag puts a load on the connecting rod. Who is right? A. Neither Technician A nor B B. Both Technicians A and B C. Technician A only D. Technician B only

Answer 1

The answer is ( Both )

Answer 2

Answer

The answer is Both

Explanation

The lower-end operation of an engine can be achieved through;

• A power load that occurs from the expansion of burning gases in the combustion chamber that will further push down the piston and turn the crankshaft.

• A lower-end engine operation can also occur when the connecting rod is pulling the piston down from the top dead center, the weight of the piston plus caused by ring friction and skirt drag.