Discussion
The type of pump used in forced water cooling system of a tractor engine is
Answer: B
The pump is a centrifugal pump.
In the forced (pump) circulation cooling system of a tractor engine, a small centrifugal impeller pump, usually driven by the same V-belt as the fan, circulates coolant from the bottom of the radiator through the water jackets of the cylinder block and head and back to the radiator. The job needs a large flow at a low head, and a centrifugal pump does that simply, with no valves and no risk of damage if the flow is throttled by the thermostat.
Piston, gear and vane pumps are positive displacement pumps. They suit high pressure and small flow, such as fuel injection or the lubrication and hydraulic systems, and would be needlessly complex and noisy for coolant circulation.
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