ME8694 Notes all 5 units notes are uploaded here. Px = Intensity of horizontal pressure on the element of the liquid, Py = Intensity of vertical pressure on the element of the liquid, Pz = Intensity of pressure diagonal of the triangular elements of the liquid. The poppet valve is simple and also easy to operate. Define pump and state the purpose of the pump in hydraulic system & classify pumps. When comparing first cost of hydraulic systems to pneumatic systems, generally they are: more expensive to purchase. Exhaust flow passes freely out of the cylinder. Hydraulic cylinder has piston and rod sizes of 100 and 70 mm, respectively. Hydraulic cylinder has piston and rod sizes of 100 and 70 mm, respectively. Methods of power transmission: There are basically 3 of transmission of power & they are : (a) Mechanical & Electrical mode: The power that drives a machine is transmitted through. It can be defined as a branch of fluids power in which gas is used as a fluid. 10) Which fluid is used in hydraulic power systems? Air is available every where. A process is to be controlled using an all pneumatic system. The sphere is filled with water, as the piston moves, the water spurts out of all the holes. Most hydraulic circuits are designed by: mechanical engineers. The liquid rises to the same level in all of the tubes, regardless of the shape or angle of the tube. The function of this valve is to pressurise & exhaust one actuator port. Oil Hydraulics and Pneumatics (2171912) MCQ. AI Robotics MCQ. Subject: Hydraulics and Pneumatics 5. port A, port P &port Ex. Answer Explanation. Oil-in-water emulsions made of_____. The air after compression in LP cylinder (ie. The figure shows a simple pressure relief valve consisting of poppet held seated in the valve body by a heavy spring. Making the air to fill a volume after passing through a restriction C. Elongating the path of air D. Any of the above An adjacent screw is provided to vary the spring force so that the valve can set open any pressure within a specified range. There are different types of connectors & they are: W-F-B-T-F-F-S-C. A single stage reciprocating when the piston moves downwards during the suction stroke, the air is drawn into the cylinder through the inlet valve. MCQ No - 1. 2) Consider a hollow sphere having small holes on its sides with a piston inside. 6. at any moment they can be in one of the two states. Blades are mounted on the slotted rotor and are usually non – metallic, made of fibre or carbon. During reaction stroke, the fluid enters the rod end side of the piston through a small opening. 1. 28. It offers a wide range of speed control which is difficult to be obtained on the machine drive. 8. 5. Set 1; Set 2; Set 3; Set 4 ) ) ) ) Post navigation. ... be shown your score and will receive an email with the answers you submitted and the correct answers to each of the questions. purpose of pump: Mechanical energy can be supplied through an electric motor. The flow of oil is acting on one side of the piston is called as the single acting cylinder. Which of the following is not a power generation device? When the spool lifts flow floe is divorced from the secondary port to operate the second phase. Ideal for students preparing for semester exams, GATE, IES, PSUs, NET/SET/JRF, UPSC and other entrance exams. Set 1; Set 2; Set 3; Set 4 ) ) ) ) Post navigation. Explain with neat sketch spring load accumulator. 5. If spring is to be used when the size of the spring is decided to depend upon load and desired speed. A pneumatic volume booster b. This article is about(Hydraulics and Pneumatics Question paper) based on the hydraulic and pneumatic subject this contains model questions and answers from previous exams, This article is just to prepare for the exams. Reduced speed of travel of machine tool elements. Following are the 7 main difference between hydraulics and pneumatic: In hydraulics and pneumatics, hydraulics is liquid and pneumatics is gas. Labels. Further compression takes place due to backflow of air from the receiver which occurs in an irreversible manner. Articles, news, products, blogs and videos from Hydraulics & Pneumatics. This makes the piston to move left. In pneumatic systems time lags are obtained by. “ON-OFF”. At the same time, the spool connects the other actuator port with the exhaust port. Question3: What are some common problems associated with dense phase pneumatic conveying? Fluid and its types The return movement of the piston is effected by built-in spring or by application of an external force. 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. In the circuit design, what is the function of a flow control valve? Take the test on Hydraulic Machines problems. The figure has shown a pilot operated valve consists of main spool, a valve body a spring & a second adjusting screw. 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. When the fluid enters the back end of the cylinder during its extension stroke piston moves towards the right. a) electrical components get damaged in electrical systems, b) fluid power system stops working without damaging the components. Mechanical Engineering MCQ Question Papers: DRDO, ISRO, Interview. When each blade arrives at the delivery passage, delivery begins. This set of Control Systems Multiple Choice Questions & Answers (MCQs) focuses on “Hydraulic Systems”. A. Pneumatic-electric elements B. The _____ enables the cylinder to lift heavy loads. Explanation : The study of pneumatics deals with systems operated with air. Ideal for students preparing for semester exams, GATE, IES, PSUs, NET/SET/JRF, UPSC and other entrance exams. They are secured to the barrel by tie rods. 6. Specific need of control engineering forced engineerings for a solution within the fluid power system. When the operation of two hydraulic cylinders is required to be performed in sequence by using a single direction valve called pilot-operated sequence valve is used. The signal pilot valves are also termed as the signal generator. last element in line. Piston ends are tapered. solid. write the classification of the control valve. In this type, gears are meshing with each other. It will be apparent that pneumatic circuits can be highly complex, involving pneumatic or electric logic controls. Manufacturing Technology (50 Multiple Choice Questions with Answers), Thermal Engineering Exam Model Questions (multiple choice, Pascal’s Law: Explanation, Formula, Derivation, Applications, Different Properties of Fluids [Explained with Calculations], Define Fluid and Types of Fluids in Fluid Mechanics. Pneumatic Control System Multiple Choice Questions and Answers; 36. Answer D. MCQ No - 2. Where pneumatic systems use air to transmit power. 4. The valve remains closed when the inlet pressure is less than spring pressure. Mechanical Engineering MCQ Question Papers: DRDO, ISRO, Interview. Next . 18. Pressure control valve: It protects the system against the excessive pressure which may occur due to high actuator loads. In this post, you'll learn what is fluid and different types of fluids. Oil is discharged due to rotation of lobes. 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