Fluid Mechanics and Machinery MCQs | Page - 6

Explanation: the higher discharge valve line holds the discharge valve closed. this helps in maintaining the valve safely.

Explanation: reciprocating pumps are classified according to the number of cylinders. and also it classified according to the number of piston sides.

Explanation: simple hand operating pump is also called as bicycle pumps. it is the simplest pump that is used to inflate bicycle tires and various sporting balls.

Explanation: at high pressure, the voids can generate shock waves. cavitation usually occurs due to the changes in pressure. the pressure change is so rapid that it leads to formation of liquid free layers or cavities that start to affect the overall performance.

Explanation: bicycle pump generates more compression than volume displacement.

Explanation: power operated pump in which only one side engages the fluid displacement is called as single acting reciprocating pump. it consists of piston in only one side of the fluid being displaced.

Explanation: power operated pump in which both the side engages the fluid displacement is called as double acting reciprocating pump. it consists of piston in both the side of the fluid being displaced.

Explanation: an axial flow pump is a type of centrifugal pump that uses an impeller with vanes that direct the flow axially. axial flow

Explanation: centrifugal pump is not a positive displacement pump. reciprocating pumps move liquid by means of a constant back-and-forth motion of a piston, plunger, or diaphragm within a fixed volume or cylinder. reciprocating pumps can handle viscous and

Explanation: reciprocating pumps are generally designed to pump in low flow, high head applications. one of the most extreme of these applications is water jet cutting, where only a few gallons pass through the pump per minute, but exceed pressures of 10,000 psi.