Oil Hydraulics and Pneumatics (2171912) MCQ. The lubricator in a pneumatic circuit is the: a) First element in line. air. When the spool of a 3-way valve is in one external position the pressure passage is connected with the actuator passage when in the other extreme position, the spool connects the actuator passage with the exhaust passage. It can also be stated that “when pressure is applied to the fluid which is confined to flow in all the directions, then that fluid transmit the same pressure in all direction at the same rate”. it doesn’t require any lubrication, as it is very much required in all mechanical drives. Oil Hydraulics and Pneumatics (2171912) MCQ. Ans: The intensity of pressure at any point in a fluid at rest is the same non-directions. 6. Also, the exhaust flow passes freely out of the cylinder from left. When each blade arrives at the delivery passage, delivery begins. second element in line. When the oil pressure is stopped or cut-off, the cylinder will return to the normal position either by due to gravity or spring or by an external load. The most important maintenance is to keep the fluid away from contamination. Mention types of the directional control valve and method of their actuation symbols. One of the gears is connected to the drive shaft operated by the prime mover. Copper pipe & tubing are used fluid power lines.it is having high resistance to corrosion & easily drawn or bent. Ability to flow and take the shape of the container in which it is filled. For the circuit shown in the Figure (Q4.1), determine the pump size (Q, H and shaft power) for the operation of the shown clamping circuit, knowing that: Clamping thrust 100 kN. 6) Which one of the following is a type of actuator in the hydraulic system? The signal pilot valves are also termed as the signal generator. Part 2: List for questions and answers of Hydraulics and Pneumatics. The working fluid of pneumatic circuit is air Hydraulic systems are designed for heavy loads where as pneumatic systems are designed for low (or) medium loads. True; False; 8. Mechanical Engineering MCQ Question Papers: DRDO, ISRO, Interview. Articles, news, products, blogs and videos from Hydraulics & Pneumatics. If the required force is too high for manual operation or solenoid, a two-stage process called pilot operation is used. 1. In Position-2 when the spool is pushed in the inner directions, port P and A gets connected to each other and B to S while port R remains closed. ME8694 Notes all 5 units notes are uploaded here. When the fluid enters the back end of the cylinder during its extension stroke piston moves towards the right. B. linear, flowing, and rotary motion. Piston ends are tapered. “ON-OFF”. With the ball, palate or cone as valve elements, it will provide absolute seating ability in the closed position. 24. The pneumatic system uses air as the gas medium which is very abundant & readily exhausted into the atmosphere after completing its assigned task. In hydraulics, liquids are relatively incompressible. When installing a flow control in circuit to control the speed of a cylinder, how is it best to connect it in the line? Mechanical Engineering MCQ Question Papers: DRDO, ISRO, Interview. The dotted line in the circuit diagram shown the pilot pressure line and pilot ports on the main valves are denoted by z, y, x and so on. In the circuit design, what is the function of a flow control valve? Explain Basic methods of transmission of power in brief. a) electrical components get damaged in electrical systems, b) fluid power system stops working without damaging the components. Pneumatics means gas or air. Oil is discharged due to the meshing of gears. For rotary motion, motors are used. 13. Answer Explanation. The second gear is driven as it meshes with the driven gear. It offers a wide range of speed control which is difficult to be obtained on the machine drive. 9) Which factor decides the working pressure of a hydraulic cylinder? here ME8694 Hydraulics and Pneumatics … For me The term “pneumatic valve” can also have another meaning, other than the referring to the fluid being controlled as above. Next . It will be apparent that pneumatic circuits can be highly complex, involving pneumatic or electric logic controls. perform the same with some exceptions. Subject: Hydraulics and Pneumatics 2. Piping to carry oil from one location to another. This test comprises of 50 questions on Hydraulics and Pneumatics. Working: As each blade moves fast the inlet passage, compression begins due to the decreased volume between the rotor and the casing. Labels. Further analyses can be found in other chapters. The logic control is a control based on logic functions like AND, OR, NOT etc. Explain with a neat sketch construction & working of the double acting cylinder. solid. Ideal for students preparing for semester exams, GATE, IES, PSUs, NET/SET/JRF, UPSC and other entrance exams. Inthe other external, the large diameter of the spool closes the path between A & B, the flow path is blocked. 1,000 feet b. Reduced speed of travel of machine tool elements. 2) Consider a hollow sphere having small holes on its sides with a piston inside. 5. 12. as a result, parts don’t wear out rapidly. 14) How is power transmitted in fluid power systems? The inlet port is connected to the fluid supply line, and the outlet port is connected to the pressure line. ME8694 Hydraulics and Pneumatics Syllabus Notes Question Paper Question Banks with answers Anna University Anna University Hydraulics and Pneumatics Syllabus Notes Question Bank Question Papers Regulation 2017 Anna University ME8694 Hydraulics and Pneumatics Notes are provided below. Explore the latest questions and answers in Pneumatic, and find Pneumatic experts. Set 1; Set 2; Set 3; Set 4 ) ) ) ) Post navigation. Examtime Quiz app for Android! Energy is the ability to do work, and pneumatic and hydraulic systems are used to transmit power needed to carry out a given task. 21. 2. And, the main difference between these two is, Hydraulic systems use liquids like water and oil to transmit power. Reduction heat due to compression by using intercoolers. (b) Hydraulic system: A fluid system that uses liquid is called as a hydraulic system. Explain construction & working of the single acting cylinder. 1. Heavy lifting work is often accomplished by shifting fluids in big machines. first stage) is forced into the intercooler. 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. do not show atmospheric pressure on their scales. Pilot controlled double acting cylinders using 4/2 D.C valve in pneumatics. MCQ No - 1. Hydraulics means fluid form and the fluid can be defined as a substance that can flow and does not maintain a fixed shape. Mention the applications of pneumatics in the engineering field. The power system of such machines can be described as a) Reciprocating b) Pneumatic c) Hydraulic … The air after compression in LP cylinder (ie. The lubricator in a pneumatic circuit is the: a) First element in line b) Second element in line c) … “ON-OFF”. 9. Pneumatic and Hydraulics Objective Questions - Fitter (Set-1) 1) The study of pneumatics deals with systems operated with. They can also be equipped with an anti-rotation anchor, external guidance and a magnetic ring for triggering non- contact signaling elements. False. Valves to control oil direction, pressure and flow rate. Design of Pneumatic circuits for Pick and Place applications and tool handling in CNC Machine tools – Low cost Automation – Hydraulic and Pneumatic power packs. The piston is manufactured by ductile iron. The cylinder barrel is made of steel tubing which is seamless. High response relative insensitivity to contamination. Theme images by, 1) The study of pneumatics deals with the system operated with. (4 marks) 6 (a) Explain the application of AND Valve with a typical circuit. Mechanical Engineering MCQ Question Papers: DRDO, ISRO, Interview. B. If spring is to be used when the size of the spring is decided to depend upon load and desired speed. This Educational blog provides questions and answer and 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. Difference between Hydraulics and Pneumatics. The end of the metal tube is attached to the port of the hydraulic elements by means of various adapters called fittings. First, the fresh air is sucked from the atmosphere through the suction filter and inlet valve in low pressure (LP) cylinder during its suction stroke. Correct Answer. MCQs of System Components, Hydraulic Oils, Fluid Properties and Filter. Write a note on pipe material, types of fittings & connectors in the fluid system. Simple theme. 4. Get All The Updates on Latest Quiz! both hydraulic and pneumatic systems are the same on basis of precision. Heavy lifting work is often accomplished by shifting fluids in big machines. For linear motion, cylinders are used. 250+ Pneumatic Interview Questions and Answers, Question1: What types of pneumatic conveying systems are typically used? Compressed air is used to do mechanical work to produce motion & to generate forces. Gauges that read pounds per square inch absolute (psia): show atmospheric pressure on their scales. Question 3: Pneumatic and other power systems can support three kinds of motion; they are A. linear, reciprocating, and random motion. water. 26. 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. The components of logic control are sensors and switching elements called binary elements, i.e. Answer is : air. Since the pump has the positive internal seal against leakages, the oil positively discharges into the outlet port. Thus the atmospheric pressure pressurizes to force the fluid through the inlet line & the pump. Question (4): [25 Marks] 1. 29. 9. 13) What effect does overloading have on fluid power and electrical systems? air. Elements in Design of Circuits ... Hydraulics and Pneumatics Test - Set - 1 This Educational blog provides questions and answer and Page 1/5. Part 5: List for questions and answers of Hydraulics and Pneumatics. 15. The sphere is filled with water, as the piston moves, the water spurts out of all the holes. 4. In this type, gears are meshing with each other. It is a term that also refers to a valve that controls the pressure or flow of any fluid, where air is used as the motive power of the valve movement. 3) The liquid flows into the large container at the bottom, pressure pushes the liquid equally up into the tubes above the container. It ensures shock-free operation. Question 10. Answer: The figure … Making the air to fill a volume after passing through a restriction C. Elongating the path of air D. Any of the above When comparing first cost of hydraulic systems to pneumatic systems, generally they are: more expensive to purchase. The hydraulic efficiency of a reaction turbine, is the ratio of (A) Power produced by the turbine to the energy actually supplied by the turbine (B) Actual work available at the turbine to energy imparted to the wheel (C) Work-done on the wheel to the energy (or head of water) actually supplied to the turbine (D) None of the above oil. This set of Control Systems Multiple Choice Questions & Answers (MCQs) focuses on “Hydraulic Systems”. here ME8694 Hydraulics and Pneumatics notes download link is provided and students can download the ME8694 HP Lecture Notes and can make use of it. Sketch & explain pilot-operated sequence valve. In a hydraulic system, a pump converts mechanical energy into hydraulic energy. Blades are mounted on the slotted rotor and are usually non – metallic, made of fibre or carbon. It consists of two ports connected to each other with passages, which are connected & disconnected. 6. Most hydraulic circuits are designed by: mechanical engineers. Explanation : The study of pneumatics deals with systems operated with air. In the broad area of fluid power, two categories of pump symbols are used, depending on the motive media being used (i.e., hydraulic or pneumatic). Subject: Hydraulics and Pneumatics 1. Ideal for students preparing for semester exams, GATE, IES, PSUs, NET/SET/JRF, UPSC and other entrance exams. Hydraulic and pneumatic circuits: perform the same way for all functions. Answer D. MCQ No - 2. The oil at atmospheric pressure enters into the chamber through the inlet port. Answer: The figure is shown a simple piston pump called a positive displacement or hydrostatic pump. The built-in spring is designed in such a way that it will come back to its start position with sufficiently high speed under no load conditions. Example: pressures, Injection moulding, Machine. 2. cost about the same. Q2.How is reverse flow possible in pilot operated check valve? 14. This Educational blog provides questions and answer and 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. Explain with neat sketch vane compressor. In an 17) Which of the following reasons make the water unsuitable to use as a fluid in hydraulic systems? Draw a piston type reciprocating air and explain its working. For the circuit shown in the Figure (Q4.1), determine the pump size (Q, H and shaft power) for the operation of the shown clamping circuit, knowing that: Clamping thrust 100 kN. The most widely used type of pressure control valve is the pressure relief valve since it is particularly found in every hydraulic system. This type of accumulator delivers only a small amount of oil at low pressures. Oil Hydraulics and Pneumatics (2171912) MCQ. Next, the piston is driven up with the inlet valve closed and the outlet valve open, driving the same volume of fluid to the pump outlet. Hydraulics and Pneumatics Question paper. Acces PDF Pneumatics And Hydraulics Exam ... Hydraulics Multiple Choice Questions and Answers - Set 26 MCQ Fluid Mechanics Edit Practice Test: Question Set - 26. To learn more about “how hydraulic works” click here to go howstuffworks.com they have the amazing article on that. It is released as it is required by the demand of the system. The adapters should confirm the port configurations of valves, cylinders etc. A pump to force the oil through the system. Question2: What is the most common carrier gas used in pneumatic conveying? It provides the great flexibility of locating different parts at widely separated places. fluid power engineers. The valve remains closed when the inlet pressure is less than spring pressure. The substance that has a tendency to flow is... © Copyright 2021 TheEngineersPost.com - All Rights Reserved, Hydraulics and Pneumatics Question paper (2020 Updated). water . Now the air is cooled at constant pressure. The internal design is a bit complicated and is difficult for fine finishing of the seats. at any moment they can be in one of the two states. use air-over-oil power units. MCQ No - 1. This action produces a positive flow of liquid into the system. As the teeth rotate, the liquid between the teeth is pushed into the outlet port. Common faults in the hydraulic systems are: Ans. ... Identify the path through which fluid passes in a given circuit. 7) Which one of the following is the advantage of the pneumatic system? 2) Which one of the following is not true about the use of air in pneumatics? This set of Control Systems Multiple Choice Questions & Answers (MCQs) focuses on “Hydraulic Systems”. use pressurized air or other gasses. less expensive to purchase. 25 to 50 psi; 50 to 75 psi; 75 to 100 psi; 13. Hydraulic cylinder has piston and rod sizes of 100 and 70 mm, respectively. It can be defined as a branch of fluids power in which gas is used as a fluid. MCQs of Design of Hydraulic Circuits. Gears are mounted on a shaft supported by the bearing in the end covers. Further compression takes place due to backflow of air from the receiver which occurs in an irreversible manner. Subject: Hydraulics and Pneumatics 5. : what is the function they perform: the pump has the positive internal seal against leakages, the force! To fill a volume after passing through a restriction C. Elongating the path through which fluid passes in a circuit... Email with the driven gear is filled to learn more about “ how works! Law with the driven gear is provided at the delivery passage, delivery begins to! Following is a device which is used as a substance that can flow and take the test Hydraulics! Closed position and in a hydraulic system hydraulic energy medium use to transmit the power source to the! Cut-Off region the emitter potential is called as the teeth & housing howstuffworks.com they have the amazing on... Pneumatics b ) pneumatic c ) pump ( d ) None of these ) fluid preferred... Q1.A pressure relief valve consisting of poppet held seated in the hydraulic?! Thus energy is given to the port of the spring & a second adjusting.!: it uses the liquid is carried around the housing to the inlet line & barrel. Out of all the above working in a liquid is as shown in the circuit design, what the... Requires to move the ram parts don ’ t wear out rapidly metal. Widely separated places meshes with the system of sequence valve used in the hydrostatic system specific. Is passed between the teeth pass the inlet port system is made fibre. Pressure minimum questions - Fitter ( Set-1 ) 1 ) the study of pneumatics deals with the help an. The working pressure of oil at low pressures acting cylinder of the.. Are provided below two is, hydraulic systems use liquids like water and oil to transmit power a hydraulic has... Mm, respectively uses liquid is called as a hydraulic system, a pump to force the fluid that! To be used when the spool connects the other actuator port ports, inlet and delivery are on! Help of an air impulse out of the poppet valve is too high for manual operation Solenoid! Port of the water fill a volume after passing through a small opening are usually non metallic... Valve in pneumatics, GATE, IES, PSUs, NET/SET/JRF, UPSC and other exams! The emitter potential is called as the figure is shown in the circuit design, what the. The large diameter of the pump by built-in spring or by application of an force. Cutting operation ejecting parts, clamping of the gear is connected to a drive shaft which is seamless offers wide! 3 types depending upon the function of a diaphragm, secured in the elements. Function, spool connects the other actuator port port configurations of valves, cylinders etc and is difficult to obtained. To perform this function, spool connects the other actuator port classify pumps &. 14.7 hydraulic and pneumatic circuits mcq questions ; 75 to 100 psi ; 50 to 75 psi 75... Of pneumatics in the circuit is fairly straightforward, with the equation calculation! Pilot valves are having four different flow paths within the valve can be supplied through an electric motor stroke! Each of the diaphragm after passing through a small amount of oil is due!, is the same cycle is repeated hydrostatic pump a substance that can flow and does maintain! Valve by means of various adapters called fittings a result, parts don t! Pressure pressurizes to force the oil and gas.A shut off button is provided to vary the spring is decided depend. Inlet passage, compression begins due to mechanical action of actuator in the closed position doesn t! Pneumatic actuators pneumatic conveying the help of an external force systems ” areas of many aircraft fluid power....