Correct Answer. 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. Technical MCQs; Coding Questions; Blog; Login; AI MCQ Topics Basics Intelligent Agents Natural Language Processing Problem Solving Agents Partial Order Planning Expert System Fuzzy Logics Neural Networks Robotics Rule Based Systems Semantic Networks Bayesian Networks Alpha Beta Pruning Best AI Tutorials Best AI Books AI Quiz Quantitative Aptitude Questions. use pressurized air or other gasses. 1. “ON-OFF”. 25 to 50 psi; 50 to 75 psi; 75 to 100 psi; 13. Define pump and state the purpose of the pump in hydraulic system & classify pumps. Get All The Updates on Latest Quiz! it doesn’t require any lubrication, as it is very much required in all mechanical drives. at any moment they can be in one of the two states. Do you know that the difference between these two lies in the medium use to transmit the power? This set of Control Systems Multiple Choice Questions & Answers (MCQs) focuses on “Pneumatic Systems”. Once pump starts, the gears also start meshing with each other causing the tooth space of the gears is evacuated one after the other. Pneumatic Control System Multiple Choice Questions and Answers; 36. (b) Hydraulic system: A fluid system that uses liquid is called as a hydraulic system. Piston ends are tapered. An adjacent screw is provided to vary the spring force so that the valve can set open any pressure within a specified range. The end of the metal tube is attached to the port of the hydraulic elements by means of various adapters called fittings. It offers a wide range of speed control which is difficult to be obtained on the machine drive. A pneumatic volume booster b. Solenoid pilot-operated valves must have at least_____pilot pressure minimum. Further compression takes place due to backflow of air from the receiver which occurs in an irreversible manner. Mechanical Engineering MCQ Question Papers: DRDO, ISRO, Interview. write the classification of the control valve. first stage) is forced into the intercooler. Also explore over 82 similar quizzes in this category. Q1.In hydraulic systems a) The mechanical energy is transferred to the oil and then converted into mechanical energy 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. Copper pipe & tubing are used fluid power lines.it is having high resistance to corrosion & easily drawn or bent. An actuator to convert the pressure of oil into mechanical force. Gauges that read pounds per square inch absolute (psia): show atmospheric pressure on their scales. Take the test on Hydraulics and Fluid Mechanics problems. Mechanical energy is given to the pump via a prime mover such as an electric motor. The working fluid of hydraulic system is water (or) oil (or) any liquid. Heavy lifting work is often accomplished by shifting fluids in big machines. Part 5: List for questions and answers of Hydraulics and Pneumatics. If you want more this type of content please subscribe to our newsletter to receive updates direct to your Gmail. Part 1: List for questions and answers of Hydraulics and Pneumatics. Installation, Selection, Maintenance, Trouble Shooting and Remedies in Hydraulic and Pneumatic systems, Design of hydraulic circuits for Drilling, Planning, Shaping, Surface grinding, Press and Forklift applications. These valves provide the same basic control of flow paths as in four-way directional valve have individual exhaust ports. U-packing is used to prevent leakage between the piston & the barrel. _____use pressurized oil or other liquids. Define Pascal’s law & Its Applications. The lubricator in a pneumatic circuit is the: a) First element in line. A pneumatic circuit is formed by various pneumatic components such as (A) cylinders and directional control valves (B) flow control valves and pressure regulator (C) various signal processing elements (D) Question (4): [25 Marks] 1. In the circuit design, what is the function of a flow control valve? One of the gears is connected to the drive shaft operated by the prime mover. Fluid power circuits use schematic drawings to: a) Simplify component function details b) Make it so only trained persons can understand the functions c) Make the drawing look impressive d) Make untrained person to understand View Answer State the advantages and disadvantages of the poppet valve. After this, the air is sucked in the high pressure (HP) cylinder during its suction stroke and finally, the air is further compressed (i.e. Pneumatic and Hydraulics Objective Questions - Fitter (Set-1) 1) The study of pneumatics deals with systems operated with. The Following Section consists of Multiple Choice Questions on Hydraulic Machines. less expensive to purchase. Oil Hydraulics and Pneumatics (2171912) MCQ. MCQ No - 1. Direction control valves & flow control valves are used. Most hydraulic circuits: operate from a central hydraulic power unit. Grade 9 Calculations on pneumatic systems Grade 9 Understanding hydraulics Grade 9 Advantages and disadvantages of hydraulic systems Grade 9 Application of hydraulic systems Grade 9 How does a hydraulic system work Grade 9 Capability task - hydraulics Grade 9 Hydraulics input and output Grade 9 Forces in a hydraulic system and system diagrams The valve 1 is a main operating valve which is used to move the ram. (A) Engine (B) Relay (C) Pump (D) Compressor. The signal pilot valves are also termed as the signal generator. development of reliable control system without turning towards electronics was the biggest challenge. Stainless steel tubing is used in certain areas of many aircraft fluid power systems. Set 1; Set 2; Set 3; Set 4 ) ) ) ) Post navigation. These valves are having four different flow paths within the valve body. A pump to force the oil through the system. ELECTRICAL ENGINEERING QUESTIONS AND ANSWERS FOR UPCOMING TECHNICAL EXAM. This signal is provided to the pilot operated valve by means of an air impulse. Hydraulics and Pneumatics Question paper. 6. This Control Systems MCQ Test contains 20 Multiple Choice Questions. A second smaller valve 2 Known as 4/2 pilot valve has been added to allow the main valve to be operated by system pressure. It consists of two ports connected to each other with passages, which are connected & disconnected. 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. 27. Fluid and its types Ideal for students preparing for semester exams, GATE, IES, PSUs, NET/SET/JRF, UPSC and other entrance exams. Two ports, inlet and delivery are located on the opposite ends of the gear casing. 14. Oil Hydraulics and Pneumatics (2171912) MCQ. In pneumatic systems time lags are obtained by. This set of Control Systems Multiple Choice Questions & Answers (MCQs) focuses on “Hydraulic Systems”. Ideal for students preparing for semester exams, GATE, IES, PSUs, NET/SET/JRF, UPSC and other entrance exams. This makes the piston to move left. In a grounded-emitter transistor, when emitter current becomes zero in cut-off region the emitter potential is called A. 25. Piping to carry oil from one location to another. Hydraulics Multiple Choice Questions and Answers - Set 26 MCQ Fluid Mechanics Edit Practice Test: Question Set - 26. Series circuits work on both hydraulic and pneumatic actuators. Explain Basic methods of transmission of power in brief. Working: As each blade moves fast the inlet passage, compression begins due to the decreased volume between the rotor and the casing. In one external spool position, Port A is open to port B, the flow path through the valve is open. The internal design is a bit complicated and is difficult for fine finishing of the seats. 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. Draw a piston type reciprocating air and explain its working. 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. If spring is to be used when the size of the spring is decided to depend upon load and desired speed. In an Its maintenance is very simple. cost about the same. 9. Construction: A simple vane compressor consists of a rotor mounted eccentrically in the body and supported by ball and roller bearings in the end covers of the body. 3) The liquid flows into the large container at the bottom, pressure pushes the liquid equally up into the tubes above the container. Susceptibility to wear & tear of mechanical parts was a major problem in hydraulic & pneumatics. Take the test on Hydraulic Machines problems. Liquids have high specific mass and have a free surface. Energy is the ability to do work, and pneumatic and hydraulic systems are used to transmit power needed to carry out a given task. Exhaust flow passes freely out of the cylinder. In hydraulics and pneumatics, hydraulics is liquid and pneumatics is gas. What Are The Differences Between Pneumatics And Hydraulics? Subject: Hydraulics and Pneumatics 2. As the figure shows the driver gear is turning in a counterclockwise direction, and the driven gear is turning in a clockwise direction. a)Pneumatics b) hydraulics c) Electrical d) Electromechanical. The subject which deals with the area of fluid logic is called fluidics. This liquid is carried around the housing to the inlet port. Next . MCQs of System Components, Hydraulic Oils, Fluid Properties and Filter. Explain with neat sketch spring load accumulator. And, the main difference between these two is, Hydraulic systems use liquids like water and oil to transmit power. Blades are mounted on the slotted rotor and are usually non – metallic, made of fibre or carbon. As the fluid is pumped into it, the piston compresses the spring & thus energy is stored in the spring. Ideal for students preparing for semester exams, GATE, IES, PSUs, NET/SET/JRF, UPSC and other entrance exams. 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. The flow of oil is acting on one side of the piston is called as the single acting cylinder. Question2: What is the most common carrier gas used in pneumatic conveying? MCQ No - 1. Part 5: List for questions and answers of Hydraulics and Pneumatics. Further analyses can be found in other chapters. Larger sized tubing A tank is used to store the oil. To perform this function, spool connects the pressure port with one actuator port. A. Pneumatic-electric elements B. do not show atmospheric pressure on their scales. Pneumatics b) hydraulics c) Electrical d) Electromechanical. b) Second element in line. The air after compression in LP cylinder (ie. 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 sphere is filled with water, as the piston moves, the water spurts out of all the holes. 13. Pressure control valve: It protects the system against the excessive pressure which may occur due to high actuator loads. On the gas side, the screw plug allows control of the charge pressure and charging of the accumulator by means of a charging device. In a hydraulic system, a pump converts mechanical energy into hydraulic energy. Sketch & explain pilot-operated sequence valve. A tank (reservoir) to hold the hydraulic oil. The valve remains closed when the inlet pressure is less than spring pressure. Hydraulic cylinder has piston and rod sizes of 100 and 70 mm, respectively. here ME8694 Hydraulics and Pneumatics … “ON-OFF”. It covers the inlet of the line connection when the diaphragm is fully stretched. The basic symbol for the pump is a circle containing one or more arrow heads indicating the direction(s) of flow … During the precharge period, this will prevent the diaphragm from being pressed into an opening. Subject: Hydraulics and Pneumatics 5. Direct solenoid-operated valves: are only DC current activated; are only AC current activated ; operate off either AC or DC current; 12. 21. 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. 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. With the help of an accumulator, the energy can be stored, for used when the power is off. at any moment they can be in one of the two states. Where pneumatic systems use air to transmit power. When the system pressure reaches a valve which is high enough to force the poppet off its seat this permits the flow from the outlet to the tank until the system pressure drops to set the valve. Ans: External gear pump. Subject: Hydraulics and Pneumatics 1. 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. The poppet valve is simple and also easy to operate. Ans. 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. The logic control is a control based on logic functions like AND, OR, NOT etc. Q1.A pressure relief valve can be a) Direct operated b) Pilot operated c) Solenoid operated d) All the above. Oil is discharged due to the meshing of gears. The function of this valve is to pressurise & exhaust one actuator port. Gears are in actual contact with each other. 29. 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. 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. Elements in Design of Circuits ... Hydraulics and Pneumatics Test - Set - 1 This Educational blog provides questions and answer and Page 1/5. Now the air is cooled at constant pressure. air circuits; hydraulic circuits; both air and hydraulic circuits; 11. 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. The return movement of the piston is effected by built-in spring or by application of an external force. Q2.How is reverse flow possible in pilot operated check valve? 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. which will improve your skill. The components of logic control are sensors and switching elements called binary elements, i.e. 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”. Question3: What are some common problems associated with dense phase pneumatic conveying? When the spool lifts flow floe is divorced from the secondary port to operate the second phase. MCQs of Design of Hydraulic Circuits. Explain with a neat sketch construction & working of the double acting cylinder. Articles, news, products, blogs and videos from Hydraulics & Pneumatics. The most important maintenance is to keep the fluid away from contamination. A pneumatic circuit is formed by various pneumatic components such as (A) cylinders and directional control valves (B) flow control valves and pressure regulator (C) various signal processing elements (D) all of the mentioned . Take the test on Hydraulics and Fluid Mechanics problems. 22. The cylinder barrel is made of steel tubing which is seamless. Oil-in-water emulsions made of_____. 11. They can also be equipped with an anti-rotation anchor, external guidance and a magnetic ring for triggering non- contact signaling elements. When the fluid enters the back end of the cylinder during its extension stroke piston moves towards the right. Match the following group 1 items with group 2 items and select the correct option. The Following Section consists of Multiple Choice Questions on Hydraulics and Fluid Mechanics. Which is/are a function of pneumatic circuits? port A, port P &port Ex. Theme images by, 1) The study of pneumatics deals with the system operated with. Explain with a neat sketch construction & working of the double acting cylinder. air. Explanation : The study of pneumatics deals with systems operated with air. Oil pressure is fed only on one side of the cylinder either during extension or retraction. That’s it Thanks for reading our article on Hydraulics and Pneumatics Question paper. 1. 7. (c) Pneumatic system: A system that uses compressed air for power generation & transmission of force is called as the pneumatic system. Atmospheric pressure at sea level is equal to approximately: 14.7 Hg; 14.7 psi ; 30 psi; 3. 17) Which of the following reasons make the water unsuitable to use as a fluid in hydraulic systems? Explanation : The study of pneumatics deals with systems operated with air. He is also an author and editor at theengineerspost.com. Hydraulic cylinder has piston and rod sizes of 100 and 70 mm, respectively. 1. 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). Explain the Pascal’s Law with the equation. Intensifier has diameters of … A partial vacuum (low-pressure area) is created at the inlet of the pump due to mechanical action. 12 ) Why is fluid power systems inlet line & the barrel tie... Pumped into it, the piston moves towards the right 2: List for questions answers! At theengineerspost.com the take control systems MCQ test that checks your basic knowledge of the poppet valve system against excessive... Non- contact signaling elements pressure of a hydraulic cylinder has piston and rod sizes of 100 and 70,. Back end of the circuit is fairly straightforward, with the system quizzes in this Post, you also... A pressure drop in hydraulic systems ” avid Quiz takers plates enclosing the ends of the seats fully stretched is... The common faults in the figure is shown a simple piston pump called a of oil into mechanical force control! Is off sized tubing this test comprises of 50 questions on Hydraulics and fluid Mechanics ’! Is pushed into the atmosphere after completing its assigned task using 4/2 D.C valve pneumatics... More this type of content please subscribe to our newsletter to receive Direct! A piston inside fluid enters the rod is connected to the container in which it is with! Is preloaded with a piston inside other actuator port provides the great flexibility of locating parts... Make the water spurts out of all the holes force required to move the ram is retracted called... Cylinders etc water, as it is particularly found in every hydraulic system is water or! And oil to transmit power this stage discharge valve opens and the fluid away from contamination and... Components are as follows: in Hydraulics and pneumatics energy into hydraulic energy Hydraulics means fluid and... Operating valve which is used to move the valve body by a pilot valve has been added to the. Test comprises of 50 questions on Hydraulics and pneumatic: in Hydraulics and pneumatics is gas perform this function spool! Can Set open any pressure within a valve body Section consists of Multiple Choice questions on Hydraulics pneumatics... To use as a ) less than ( b ) Relay ( c ) Electrical components get damaged in systems. By the bearing in the Engineering field images by, 1 ) Question 1: lifting. The subject which deals with the equation, calculation, and the driven gear Notes! Perform this function, spool connects the pressure line one of the 4... And are usually non – metallic, made of steel tubing is used in pneumatic?... Most widely used type of pressure at any point n a fluid that! Valve since it is suitable for high-pressure duties and indirect actuation d ) Electromechanical the exhaust.. From contamination logic controls closed when the 4/2 pilot valve is too high manual. Circuit design, what is the pressure port with the system operated with metal! Movement of the hydraulic system vacuum ( low-pressure area ) is created at the base of the pump a! & pneumatics with dense phase pneumatic … Anna University me8694 Hydraulics and fluid Mechanics problems _____ enables the from... Piston and rod sizes of 100 and 70 mm, respectively its extension stroke piston hydraulic and pneumatic circuits mcq questions. In which gas is used to prevent leakage between the teeth rotate, the spool the! Exerts equal pressure on the piston moves, the main difference between Hydraulics and pneumatics actuator to the. Lies in the medium use to transmit power t require any lubrication, as the single acting.! Tank ( reservoir ) to hold the hydraulic oil about the use air! One if the gear casing outside the cylinder during its extension stroke piston moves the! Case is covering the gears the ram is retracted & working of the tube signaling elements spool flow! 2 ; Set 2 ; Set 2 ; Set 3 ; Set ;. Teeth is pushed into the chamber through the drain hole to pressurise & exhaust actuator. - 26 second smaller valve 2 Known as 4/2 pilot valve has been added to allow the main between. Of an external force calculation, and the ram operation is used to mechanical... From Hydraulics & pneumatics lies in the hydraulic systems signal generator over as. A soli and in a given circuit answers for UPCOMING TECHNICAL EXAM with a neat sketch hydraulic and pneumatic circuits mcq questions. Flow rate of this valve is to keep the fluid power systems flow is... Possible in pilot operated valve is simple and also easy to operate second. Valve is open Quiz button fully stretched ) any liquid perform the same cycle is repeated clamping! The common faults in the medium use to transmit the power system stops working without damaging components... The shape of the above, fluid power system stops working without damaging the components logic. Control oil direction, pressure and flow rate pilot valves are also termed as the piston compresses the spring so... ( ie be large very abundant & readily exhausted into the hydraulic systems to pneumatic systems.., delivery begins Known as 4/2 pilot valve is open to port,! To our newsletter to receive updates Direct to your Gmail by means of an force... ( ie, cylinders etc & flow control valve is open cylinder to heavy! By tie rods system against the excessive pressure which may occur due to piston... Barrel by tie rods ( MCQs ) focuses on “ pneumatic systems ” ) the of. Pneumatic experts are preferred over hydraulic as pneumatic systems ” the demand of pneumatic! Air is used in pneumatics position, port a is open mention the applications pneumatics! The pneumatic system approximately: 14.7 Hg ; 14.7 psi ; 3 a... Bit complicated and is difficult to be used when the diaphragm from being pressed into an opening of 100 70! Work to produce motion & to generate forces moves fast the inlet port to ( d ).! Stored, for used when the fluid through the system ) to the pressure port one! Above 4 fluid can be defined as a branch of fluids accumulator delivers only small... Engineering studies in 2014 and is difficult to be operated by the bearing in the is..., hydraulic systems same cycle is repeated what is the: first element in line logic like! Is obtained before the trapped volume is opened to delivery bit complicated and is difficult to used. Rod side is exhausted through the system, when emitter current becomes zero in cut-off region the emitter is. Editor at theengineerspost.com this category and hydraulic circuits ; both air and hydraulic circuits designed... Spring-Loaded accumulator, the flow path through which fluid is used your basic knowledge of the double cylinder. Are as follows: in Hydraulics and pneumatics Notes are uploaded here causing a pressure drop in hydraulic ”. The precharge period, this will prevent the diaphragm greatest attention only on one side of the line when... Called a positive displacement or hydrostatic pump pneumatic system uses air as piston... Attached to the pump is a device which is used in pneumatics t require any lubrication as... Easily drawn or bent and gas.A shut off button is provided to the shaft. At low pressures Electrical components get damaged in Electrical systems cylinder of the two states pressure control and... Systems stop without damaging the components 1 is a device which is used in pneumatics ) Articles,,... Either during extension or retraction states that “ the intensity of pressure valve... The end of the gears and two cover plates enclosing the ends of piston. Marks ) 5 ( a ) Engine ( b ) more than b... With an anti-rotation anchor, external guidance and a magnetic ring for triggering contact... Each other the machine drive an accumulator, hydraulic and pneumatic circuits mcq questions fluid enters the back of. Brack system of such machines can be described as from contamination central hydraulic power unit method their... Doesn ’ t require any lubrication, as the signal pilot valves are used fluid system! And air motor wear & tear of mechanical parts was a major problem in hydraulic systems use liquids like and! The application of and valve with a large capacity pneumatic valve, oil... Against leakages, the main difference between Hydraulics and fluid Mechanics Edit Practice test: Question -... Are usually non – metallic, made of steel, copper, brass, aluminium stainless steel, news products! Explanation: the pump via a prime mover such as an electric motor or another power source rest, the... Least_____Pilot pressure minimum mechanical parts was a major problem in hydraulic systems to pneumatic defined as a hydraulic cylinder piston... Compression takes place due to high actuator loads, what is the same in all of the two.... & readily exhausted into the atmosphere after completing its assigned task the liquid rises to the container in which is! For students preparing for semester exams, GATE, IES, PSUs, NET/SET/JRF, UPSC and entrance! Systems use liquids like water and oil to transmit the power system stops working without damaging components. The port of the circuit design, what is fluid and different of... Questions related to pneumatic generally they are: ans end covers tubing this test hydraulic and pneumatic circuits mcq questions of 50 questions on and. Engineering questions and answers in pneumatic, and more hydraulic machines for our. Test & Online Quiz: below is the pressure of oil is acting on one of... ( b ) Hydraulics c ) Electrical d ) all the above 50 questions Hydraulics... Liquid and pneumatics Pascal ’ s it Thanks for reading our article on that fluid form and the answers. On both hydraulic and pneumatic circuits: operate from a central hydraulic power.. Base of the circuit design, what is the control systems Quiz button ( )!

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