题目内容

What is the principle of operation used in gear pumps?

A. two gears rotate in same direction
B. two gears rotate in opposite direction
C. two gears rotate in same and opposite direction
D. none of the above

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What cause discharge of fluid in an external gear pump?1. the electric motor drives one gear which turns the other gear2. the electric motor drives both the gears simultaneously3. fluid passes between the gears to discharge side4. fluid passes through interior of the casing between teeth and casing and not between the gears

A. 1 and 3
B. 2 and 3
C. 1 and 4
D. 2 and 4

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The rotation of gears in internal gear pump takes place in ( )

A. same direction
B. different direction
C. none of the above

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What causes internal leakage in internal gear pump?

A. less tolerance level between the meshing surfaces
B. more tolerance level between the meshing surfaces
C. no tolerance between the meshing surfaces
D. none of the above

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What is the relation between pressure and overall efficiency for a gear pump?

A. as pressure increases, overall efficiency decreases
B. as pressure increases, overall efficiency increases
C. overall efficiency is not affected by change in pressure
D. none of the above

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What is the principle of operation used in gear pumps?

A. two gears rotate in same direction B. two gears rotate in opposite direction C. two gears rotate in same and opposite direction D. none of the above

The rotation of gears in internal gear pump takes place in ( )

What causes internal leakage in internal gear pump?

What is the relation between pressure and overall efficiency for a gear pump?

A. two gears rotate in same direction
B. two gears rotate in opposite direction
C. two gears rotate in same and opposite direction
D. none of the above