InnoQuiz_CW15_2023

The 4-way, 3-position is the most popular type of DCV used. It has three positions: one to extend the actuator, one to retract the actuator,and one to

• drain the oil

• stop the actuator

• pump to pressure line

• to connect adjacent system

A blocked drain on a sequence valve will cause ______________

• No change in function

• reverse flow to occur

• valve to stay closed

• none

Because pressure is on the downstream side of a PRV, oil will naturally seep into the _________

• Spool

• Spring chamber

• Reservoir

• Tank

The simplest hydraulic device that you will find in common use today is what?

• a bulldozer

• a log splitter

• crane

What is the advantage of using a single acting cylinder?

• All the above

• Honing inside the inner surface of pump is not required

• Piston seals are not required

• High cost and reliable

Why are hydraulic cylinders cushioned?

• a)Stress and vibrations can be reduced

• b)Cushioning decelerates the piston of a cylinder

• None

• Both a and b

What is the relation between temperature and viscosity for hydraulic oil?

• As temperature increases viscosity decreases at atmospheric pressure

• As temperature decreases viscosity decreases at atmospheric pressure

• None of the above

• Temperature and viscosity vary linearly

When does expansion of spring and retraction of cylinder take place in spring type single acting cylinder?

• Oil pressure exerted is more than spring compression pressure

• Oil pressure exerted and spring compression pressure are same

• Oil pressure exerted is less than spring compression pressure

• None

To divert the pump delivery to the reservoir for the speed control of the actuator is known as……

• Bleed off circuit

• By pass circuit

• Meter-out circuit

• Meter-in Circuit

How is reverse flow possible in pilot operated check valve?

• Spring force lifts the ball due to which reverse flow is possible

• Fluid pressure lifts the ball due to which reverse flow is possible

• No reverse flow is possible

• None