Basic V-Belt Drives

A. low power, intermittent operation

A Fractional Horsepower (FHP) V-Belt is used for __________. A. low power, intermittent operation B. constant running installations C. Conveyors D. applications exceeding 100 Hp

A. V

A __________ belt should ride high in the groove with its top near the top of the sheave and should not touch the bottom of the sheave. A. V B. flat C. timing D. Round

A. As close as possible to

A sheave should be placed __________ the bearing. A. As close as possible to B. Half the bearing's diameter from C. The bearing's full diameter from D. Half the sheave's diameter from

B. less

A used belt requires __________ belt deflection force than a new belt. A. slightly more B. less C. 50% more D. the same

D. decrease; increase

In a belt drive system, as the pulley ratio increases, shaft speed on the driven pulley will __________ and shaft torque will __________. A. increase; increase B. decrease; remain the same C. increase; decrease D. decrease; increase

B. will not slip during operation

One important characteristic of a timing belt is that it __________. A. requires more tension than a v-belt B. will not slip during operation C. makes more noise than a flat belt D. is easier to replace than a v-belt

D. All of the above

Pitch is defined as the distance between a point and a similar corresponding point. Examples of pitch are __________. A. Chains B. screw threads C. gears D. All of the above

B. pitch diameter of the driven pulley to the pitch diameter of the driver pulley

Pulley Ratio is defined as the ratio of __________. A. outside diameter of the driven pulley to the outside diameter of the driver pulley B. pitch diameter of the driven pulley to the pitch diameter of the driver pulley C. pitch diameter of the driver pulley to the pitch diameter of the driven pulley D. shaft diameter of the driver pulley to the shaft diameter of the driven pulley

C. adjustable motor mount

Tension is applied to the belt by moving the driver motor away from the driven shaft. This can be done with a pry bar, punch, or __________. A. dial caliper B. rule C. adjustable motor mount D. micrometer

C. your sense of touch

The most basic way to test the tension of a belt is to use __________. A. a tension tester B. a spring scale and straight edge C. your sense of touch D. increase belt span

C. the place in the belt which represents the center of the force that is being transmitted by the belt

The pitch circle of a belt drive is __________. A. the outer edge of the hub B. the bottom of the sheave groove C. the place in the belt which represents the center of the force that is being transmitted by the belt D. located somewhere outside the outer diameter of the sheave

C. belt, drive sheave, and driven sheave

The three basic components for a belt drive system are __________. A. motor, pump, and belt B. motor, pulley, and drive sheave C. belt, drive sheave, and driven sheave D. belt, shaft, and pulley