Pressure Relief Valve Quiz

What is the main purpose of a pressure relief valve?

• To regulate the flow of fluid in a hydraulic line

• To increase the pressure in a hydraulic line

• To prevent the flow of fluid in a hydraulic line

• To relieve excessive pressure in a hydraulic line

What happens when the pressure in the hydraulic line exceeds the limit set by the relief valve?

• The valve regulates the pressure

• The valve opens to relieve the pressure

• The valve closes to stop the flow of fluid

• The valve increases the pressure further

What is the purpose of the cracking pressure in a direct-acting relief valve?

• To fully open the valve

• To regulate the flow of fluid

• To close the valve

• To set the minimum pressure for the valve to begin opening

How is the cracking pressure set in a direct-acting relief valve?

• By changing the tension in the spring using an adjusting nut or knob

• By adjusting the flow rate of the fluid

• By increasing the size of the valve

• By changing the tension in the hydraulic line

What is the advantage of a pilot-operated relief valve over a direct-acting relief valve?

• Faster response times to pressure spikes

• Smaller size and ability to work with higher system pressures and higher flows

• Lower cost and faster response times to pressure spikes

• Ability to handle maximum flow rating of the valve

What is the function of the pilot relief valve in a pilot-operated relief valve?

• To allow fluid to flow from the pressure side through the orifice and across the pilot relief valve to the tank

• To handle the maximum flow rating of the valve

• To regulate the flow of fluid

• To fully open the main valve

What happens when the pump line pressure decreases below the relieving pressure set by the adjustment knob in a pilot-operated relief valve?

• The pilot poppet remains closed and the pressure in the main spring chamber is the same as the line pressure

• The main poppet moves and allows full flow through the relief valve

• The pilot valve opens and allows fluid to flow from the pressure side through the orifice

• The main spool closes and restores a balance of pressure

Where can relief valves be used in a hydraulic circuit?

• To increase the pressure in the circuit

• To regulate the flow of fluid in the circuit

• To prevent pressure from exceeding a maximum level

• To handle the maximum flow rating of the circuit

The flow pass through:___

• pump=>directional control valve => pressure relief valve => directional control valve => tank

• pump=>directional control valve => flow control valve => directional control valve => tank

• pump=>directional control valve => flow control valve => directional control valve => pressure relief valve

• pump=>pressure relief valve => flow control valve => directional control valve => tank

If the directional control valve is set to the close position,____

• fluid will leak all over

• fluid will go through the all the valves

• fluid cannot not longer flow through the directional control valve

• fluid can still flow through the directional control valve