Question

which of the following vehicles is most likely to use a high torque rise engine? an urban transit bus an engine in a bulldozer or excavator a garbage truck a line haul highway tractor 5 multiple choice 1 point the stroke length of an engine can be changed only by altering: the cylinder bore. the length of the connecting rod. the length of the crankshaft throw. the valve timing. 6 multiple choice 1 point in which position are the engine valves during the compression stroke? intake valve is open; exhaust valve is closed. intake and exhaust valves are both closed intake and exhaust valves are both open. intake valve is closed; exhaust valve is open.

Explanation:

1. High torque - rise engines are best suited for heavy - duty applications that require significant low - speed pulling power. Bulldozers and excavators need to move heavy loads and perform high - resistance tasks, so they require high torque at low speeds. Urban transit buses, garbage trucks, and line - haul highway tractors also need torque but not as specifically high - torque rise as bulldozers/excavators.
2. The stroke length of an engine is determined by the length of the crankshaft throw. Changing the cylinder bore affects the engine displacement but not the stroke. The length of the connecting rod affects other aspects of engine operation but not the stroke directly. Valve timing is related to the opening and closing of valves and not to stroke length.
3. During the compression stroke, both the intake and exhaust valves are closed to compress the air - fuel mixture in the cylinder.

Answer:

1. B. An engine in a bulldozer or excavator
2. C. the length of the crankshaft throw
3. B. Intake and exhaust valves are both closed