This ensures easy exhausting of the valve. In an external mouthpiece, the absolute pressure head at vena contracta is _____ the atmospheric pressure head by an amount equal to 0.89 times the height of the liquid, above the vena contracta. Ans: External gear pump. The lubricator in a pneumatic circuit is the: a) First element in line b) Second element in line c) … The figure shows a simple pressure relief valve consisting of poppet held seated in the valve body by a heavy spring. Next . HYDRAULICS and FLUID MECHANICS Questions and Answers pdf free download for freshers civil engineering mcqs objective type questions lab viva manual Skip to content Engineering interview questions,Mcqs,Objective Questions,Class Notes,Seminor topics,Lab Viva Pdf free download. What Are The Differences Between Pneumatics And Hydraulics? Multiple Choice Questions on Hydraulic Machines . Next . In the circuit design, what is the function of a flow control valve? a)Pneumatics b) hydraulics c) Electrical d) Electromechanical. write the classification of the control valve. They are secured to the barrel by tie rods. Ans. During reaction stroke, the fluid enters the rod end side of the piston through a small opening. Mechanical Engineering MCQ Question Papers: DRDO, ISRO, Interview. Unlike roots blower, some or all of the compression is obtained before the trapped volume is opened to delivery. 27. 1. Question (4): [25 Marks] 1. Oil Hydraulics and Pneumatics (2171912) MCQ. The signal pilot valves are also termed as the signal generator. Design of Pneumatic circuits for Pick and Place applications and tool handling in CNC Machine tools – Low cost Automation – Hydraulic and Pneumatic power packs. Oil pressure is fed only on one side of the cylinder either during extension or retraction. Mention the applications of pneumatics in the engineering field. second element in line. Answer: c. 9. As the fluid is pumped into it, the piston compresses the spring & thus energy is stored in the spring. Explain positive displacement pump & mention its advantages. b) Second element in line. _____use pressurized oil or other liquids. 8) What are the reasons causing a pressure drop in hydraulic systems? Following are the 7 main difference between hydraulics and pneumatic: In hydraulics and pneumatics, hydraulics is liquid and pneumatics is gas. Two ports, inlet and delivery are located on the opposite ends of the gear casing. Ans: Differences between hydraulic & pneumatic system : Fluidics: Fluidics is a part of the fluid power technology that develops a totally reliable hydrauic& pneumatic control system using fluid flow phenomena in components & circuits to perform a variety of control functions such as sensing, logic, memory & timing. The components of logic control are sensors and switching elements called binary elements, i.e. It ensures shock-free operation. The _____ enables the cylinder to lift heavy loads. This set of Control Systems Multiple Choice Questions & Answers (MCQs) focuses on “Pneumatic Systems”. The components of logic control are sensors and switching elements called binary elements, i.e. Gauges that read pounds per square inch absolute (psia): show atmospheric pressure on their scales. less expensive to purchase. Explain with neat sketch. True; False; 8. With a large capacity pneumatic valve, the operating force requires to move the valve can be large. Explain the construction and working of Diaphragm Accumulator. MCQ No - 1. It states that “The intensity of pressure at any point n a fluid at rest, is the same in all direction”. Match the following group 1 items with group 2 items and select the correct option. air. State the advantages and disadvantages of the poppet valve. A pump converts mechanical energy into hydraulic energy. Susceptibility to wear & tear of mechanical parts was a major problem in hydraulic & pneumatics. Acces PDF Pneumatics And Hydraulics Exam Questions Answers important mcq points for all competitive exams like UPSC, GPSC, GSSSB, SSC, CGL, JE, SE, NDA, PSC, GATE, Bank, RAILWAY, JEE, All India PSC Exam, and other Government exam body. Define pump and state the purpose of the pump in hydraulic system & classify pumps. Try this amazing Quiz About Pneumatic Engineering quiz which has been attempted 2572 times by avid quiz takers. Set 1 Most hydraulic circuits are designed by: mechanical engineers. High response relative insensitivity to contamination. solid. The figure has shown a pilot operated valve consists of main spool, a valve body a spring & a second adjusting screw. Where pneumatic systems use air to transmit power. Solenoid pilot-operated valves must have at least_____pilot pressure minimum. Pneumatic Control System Multiple Choice Questions and Answers; 36. By itself, fluid has no power, but when confined and placed under , fluid can transmit power that can be stored, directed and made to do work. it doesn’t require any lubrication, as it is very much required in all mechanical drives. Answer : Working fluid: Pneumatics use air, Hydraulics use Oil; Power: Pneumatic power less than hydraulic power; Size: P components are smaller than H components; Leakage: Leaks in hydraulics cause fluid to be sticking around the components. 2) Consider a hollow sphere having small holes on its sides with a piston inside. 25 to 50 psi; 50 to 75 psi; 75 to 100 psi; 13. Air tools like pneumatic drilling, punching riveting etc. This signal is provided to the pilot operated valve by means of an air impulse. Part 1: List for questions and answers of Hydraulics and Pneumatics. Definition of pump: The pump is a device which is used to pump fluid. 11. Compressed air is used to do mechanical work to produce motion & to generate forces. Note that the length of stroke is the actual working movement. Explain the construction & working of the single acting cylinder of the pneumatic system. 3) In a pneumatic system, a sensor serves the purpose of, 4) The power source in a pneumatic system is, 5) The storage space for a fluid is called. In the circuit design, what is the function of a flow control valve? The control valve is classified into 3 types depending upon the function they perform: The figure shows the Double acting cylinder. Radial motor … In this post, you'll learn what are the different properties of fluids with the equation, calculation, and more. Control Systems MCQ Test & Online Quiz: Below is the Control Systems MCQ Test that checks your basic knowledge of the Control Systems. Pneumatic Control System Multiple Choice Questions and Answers; 36. Oil-in-water emulsions made of_____. In this valve, the fluid flows freely through the primary passage to operate the first phase until the pressure setting of the sequences valve is reached. 28. If you want more this type of content please subscribe to our newsletter to receive updates direct to your Gmail. (A) Flow control valve changes the direction of flow (B) Flow control valve can adjust the flow rate of fluid (C) Both of the mentioned (D) None of the mentioned . 7) Which one of the following is the advantage of the pneumatic system? As the name indicated it consists of a diaphragm, secured in the shell. Most hydraulic circuits: operate from a central hydraulic power unit. Write a note on pipe material, types of fittings & connectors in the fluid system. Is not a power generation device piston & the pump forces the fluid the. It states that “ the intensity of pressure at any moment they can a. Enters into the outlet port the reasons causing a pressure drop in hydraulic,. 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