Hydraulics and pneumatics - Study guides, Class notes & Summaries

Hydraulics and Pneumatics Quiz 2 with Complete Solutions Graded A+ The primary purpose of a relief valve is to _____ system pressure. (HL4 1-1) - Answer-limit When using a needle valve to control speed, excess pump flow is directed over the _____ valve. (HL4 1-2) - Answer-relief When operating in a flow control circuit, the speed of the actuator _____ when the flow through the relief valve increases. (HL4 1-3) - Answer-decreases The two types of relief valves are _____ and pilot-operat...

The rod - ️️What explains why the extracting speed and retracting speed are different on a double-sided cylinder? 10 inches - ️️What cylinder bore area is necessary if you have 80 PSI and 800 Lbs of force? Eye mount - ️️You're going to install an actuator that's going to operate sealing jaws on a factory machine. The jaw requires something to pivot up and down, What type of mounting is best for this process? Binding or Friction - ️️What is the probable effect of side l...

A remote-controlled, pilot-operated ___ valve is type of pilot-operated relief valve that uses one or more external pilot valves to set the pressure at which the relief valve will open. - ️️relief A ___ valve is a normally closed pressure control valve that prevents a hydraulic motor from running away, or speeding out of control. - ️️brake A ___ pressure control valve is a type of pressure control valve that is remote controlled and, instead of a spring, uses pilot pressure set at ...

Hydraulics and Pneumatics Final PASSED Exam Questions and CORRECT Answers Absolute pressure can be used in systems that have vacuums to avoid using a negative number. (T/F) - CORRECT ANSWER- True Changing the angle of the swash plate in a variable-displacement piston pump does not affect the distance of how far back a piston pulls. (T/F) - CORRECT ANSWER- False Bleed-off systems are used when more flow control accuracy and less system efficiency is required. (T/F) - CORRECT ANSWER- Fal...

Pascal's Law deals with measuring the amount of force that acts on a unit of area. What is the formula that represents this? - ️️F=AxP Volume is the amount of space a fluid occupies. the formula we use to express this is? - ️️V=AxD A gain in mechanical advantage is achieved using? - ️️Different sized pistons and constant pressure. Viscosity is ? - ️️The internal resistance to flow The flash point is the temperature at which a liquid gives off vapor in sufficient quan...

Hydraulics and Pneumatics Final UPDATED Exam Questions and CORRECT Answers The vertical arrow across the flow path of a flow control valve indicates _____ _____. (IHL2 3-1) - CORRECT ANSWER- pressure-compensated The pressure-compensated flow control valve provides a constant flow rate by keeping the needle valve's upstream and downstream pressure _____ _____. (IHL2 3-2) - CORRECT ANSWER- differential constant The spool that controls the pressure drop across the opening of the pressu...

Hydraulics and Pneumatics Test Questions with Answers Connection between pneumatic components is made using quick connect fittings that could be what? - Answer-Connected and disconnected when they are not under pressure. Air bearing are fluid power actuators that reduce or eliminate what? - Answer-friction They convert pressure into a dial reading. - Answer-pressure gauges Which gas is commonly used in pneumatics? - Answer-Air Which two properties of compressed air make possible smo...

Using a hand pump, pressure of 100 PSI has been built up in a hydraulic system. The hand pump piston is 1 inch in diameter. A 1/2-inch line connects the hand pump to an actuating cylinder 2 inches in diameter. What is the pressure in the line between the hand pump and the actuator? - ️️100 PSI. A common cause of slow actuation of hydraulic components is - ️️internal leakage in the actuating unit. In a hydraulic system that has a reservoir pressurized with turbine-engine compressor ...

the fluid conditioning system of hydraulic powered equipment provides fluid that is clean and maintained in an acceptable operating ___________. - ️️Conditions What are three components that contribute to contaminants in the hydraulic fluid as they wear? - ️️Water, air , heat ________ percent or more of the prime mover horsepower is converted into heat that raises fluid temperature in a hydraulic system? - ️️20 what is the best approach to assure a clean operating system? - ...