Hydraulic Machines MCQ with answer and solution

Concept

Type of pump in hand pumps

Formula

NONE

Step-by-step solution

1. Hand pumps are manually operated water lifting devices used to extract groundwater. Answer: A

Explanation

Standard hand pumps rely on a manually driven piston moving inside a cylinder to create suction and discharge water. This up-and-down motion operating with check valves defines a positive displacement reciprocating pump. Therefore, option A correctly identifies the pump mechanism.

Why the other options are wrong

C) Axial flow pumps are used for high discharge at low heads rather than hand pumps. D) Radial flow pumps are centrifugal type pumps rather than standard hand pumps.

Shortcut

Hand pumps rely on simple piston stroke action, identifying them as reciprocating pumps.

Common mistake

Selecting submersible pump assuming modern domestic pumps are centrifugal rather than reciprocating in hand pumps.