题目内容

What will be the discharge of oil in axial piston pump, when the angle of swash plate is zero?

A. discharge of oil is maximum
B. discharge of oil is minimum
C. there is no discharge of oil
D. none of the above

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In which of these pumps, swash plate is replaced by cylinder block?

A. bent axis piston pump
B. radial piston pump
C. axial piston pump
D. none of these

In a bent-axis piston pump, what happens when the angle between the drive shaft and the cylinder block is varied?

A. piston displacement cannot be varied
B. variable flow rate can be achieved
C. fixed flow rate can be achieved
D. all the above

What is the maximum angle between the cylinder block and shaft axis of a bent-axis piston pump?

A. 30°
B. 50°
C. 45°
D. all the above

Which of the following statements are true?① piston pumps are self-priming.② piston pumps require high maintenance.③ piston pumps have low cost of production.④ piston pumps have low volumetric efficiency.

A. ① and ②
B. ③ and ④
C. ① and ③
D. all the above

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