Q1: Foot valve provided in the pump is a __________ valve.

ANS:B - back pressure

A foot valve provided in a pump is a check valve.

Explanation:

1. Function of Foot Valve:
   • A foot valve is typically installed at the bottom of a suction pipe or at the intake of a pump to prevent the backflow of fluid (liquid or gas) when the pump is turned off or during pump startup.
   • It ensures that the fluid does not drain back into the source (such as a well, reservoir, or tank) and maintains prime in the suction line.
2. Type of Valve:
   • The foot valve is a type of check valve, specifically designed to allow flow in one direction (towards the pump) and prevent flow in the opposite direction (away from the pump).
   • It opens when the pump operates to allow fluid to enter the pump suction line and closes by its own weight or a spring mechanism to prevent reverse flow when the pump stops.
3. Comparison with Options:
   • Direction Control Valve: Controls the direction of flow in a hydraulic system, allowing fluid to move in specific paths.
   • Back Pressure Valve: Maintains a set pressure in a system by restricting flow until the pressure reaches the desired level.
   • Relief Valve: Protects equipment from overpressure by opening when the pressure exceeds a preset limit, diverting fluid to a lower pressure path.
   • Pressure Reduction Valve: Reduces pressure in a system by diverting excess fluid flow or adjusting flow paths.

Conclusion: