pneumatics and hydraulics exam questions and answer pdf. Answer: Option C. Practice Test: Question Set - 07 1. It can also be stated that âwhen 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 rateâ. Answer: The figure … 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. Gears are in actual contact with each other. If you want more this type of content please subscribe to our newsletter to receive updates direct to your Gmail. Ans: External gear pump. Answer Explanation. This makes the piston to move left. 27. Mention the applications of pneumatics in the engineering field. Answer: Option D 29. the tendency of breaking away the stream of liquid, Actual Answer is : air. purpose of pump: Mechanical energy can be supplied through an electric motor. velocity of jet at vena contracta to the theoretical velocity, Loss 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. 61 TOP MOST HYDRAULIC MACHINES – Mechanical Engineering Multiple choice Questions and Answers All Engineering Exams Study Material, Books and Guidance ER-Exams App Download: - click here Hydraulic Machines Interview Questions and Answers :- 1. Answer: Option D 4. It provides the great flexibility of locating different parts at widely separated places. The pump forces the fluid into the hydraulic system. High response relative insensitivity to contamination. In position-1, when the spool is actuated towards outer direction port âPâ connects to âBâ and âSâ remains closed while A gets connected to âRâ. 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 It gives an on-off function. – Reliability of electromagnetic devices is limited compared to that of hydraulic and pneumatic devices. Top 36 hydraulic interview questions with answers pdf. Explain the construction and working of Diaphragm Accumulator. Now the air is cooled at constant pressure. Define Pascalâs law & Its Applications. If the required force is too high for manual operation or solenoid, a two-stage process called pilot operation is used. 4. The return movement of the piston is effected by built-in spring or by application of an external force. Making the air to fill a volume after passing through a restriction C. Elongating the path of air D. Any of the above Difference between Hydraulics and Pneumatics. Also, the exhaust flow passes freely out of the cylinder from left. Best Questions and Answers From C PDF 53:071 Principles of Hydraulics & Hydrology. With the help of an accumulator, the energy can be stored, for used when the power is off. 2. 26. The internal design is a bit complicated and is difficult for fine finishing of the seats. The inlet port is connected to the fluid supply line, and the outlet port is connected to the pressure line. (A) The direction and magnitude of the velocity at all points are identical (B) The velocity of successive fluid particles, at any point, is the same at successive periods of time (C) The magnitude and direction of the velocity do not change from point to point in the fluid (D) The fluid particles move in plane or parallel planes and the streamline patterns are identical in each plane This set of Control Systems Multiple Choice Questions & Answers (MCQs) focuses on “Pneumatic Systems”. On the gas side, the screw plug allows control of the charge pressure and charging of the accumulator by means of a charging device. Top 10 hydraulic interview questions with answers In this file, you can ref Free ebook: 80 interview questions and answers pdf download • 25 interview. Sketch and explain the basic hydraulic system. This type of projection is when projectors are parallel to each other, but are at an angle other th... Chain Drives MCQ Practice Test: 1. The figure shows a simple pressure relief valve consisting of poppet held seated in the valve body by a heavy spring. What is the function of a Direction control valve? Specific need of control engineering forced engineerings for a solution within the fluid power system. Following are the 7 main difference between hydraulics and pneumatic: In hydraulics and pneumatics, hydraulics is liquid and pneumatics is gas. The piston exerts equal pressure on the surface of the water. 16. It is released as it is required by the demand of the system. 8. of head in the orifice to the head of water available at the exit of the Answer: Option C Hydraulic and pneumatic circuits: perform the same way for all functions. pneumatics and hydraulics exam questions and answer pdf. How are the control valve classified? Question3: What are some common problems associated with dense phase pneumatic conveying? Define fluidics & mention the needs for fluidics. As the piston driven down, the inlet valve opens and a volume of fluid (determined by the cross-section area of the piston and the length of stroke) is drawn into the cylinder. 13. Friction Clutches Objective Practice Test 1. The operating force required to move the valve is too high. write the classification of the control valve. Practice Test: Question Set - 01 1. 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. Understand the operating principles of hydraulic systems. 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U-packing is used to prevent leakage between the piston & the barrel. The single acting cylinder is used in cutting operation ejecting parts, clamping of the workpiece, feeding and lifting. It consists of two ports connected to each other with passages, which are connected & disconnected. A. Pneumatic-electric elements B. This figure shows the construction of gear pump. 8. 10. This is a test of the ability to read hydraulic and pneumatic prints and drawings. Explain the construction & working of the single acting cylinder of the pneumatic system. Example: pressures, Injection moulding, Machine. What are the advantages of a hydraulic system? Choice of working media: Electrical current (electricity) Fluids (hydraulics) Compressed air (Pneumatics) A combination of the above Selection criteria for the working section: Force Stroke Type of motion (linear, swivelling, rotating) Speed Service life Safety and reliability Energy costs Controllability Storage Choice of control media: Fluids display properties such as. To learn more about âhow hydraulic worksâ click here to go howstuffworks.com they have the amazing article on that. Which check valve (A or B or C or D or E ) could be installed backward (reversed) and explain your choice? Hydraulics and Pneumatics: A Technician's and Engineer's Guide provides an introduction to the components and operation of a hydraulic or pneumatic system. This test comprises of 50 questions on Hydraulics and Pneumatics. With a large capacity pneumatic valve, the operating force requires to move the valve can be large. Draw a piston type reciprocating air and explain its working. Ability to flow and take the shape of the container in which it is filled. In a hydraulic system, a pump converts mechanical energy into hydraulic energy. The poppet valve is simple and also easy to operate. Try this amazing Quiz About Pneumatic Engineering quiz which has been attempted 2572 times by avid quiz takers. Copper pipe & tubing are used fluid power lines.it is having high resistance to corrosion & easily drawn or bent. The exhaust air on the piston rod side is exhausted through the drain hole. Manufacturing Technology (50 Multiple Choice Questions with Answers), Thermal Engineering Exam Model Questions (multiple choice, Pascalâs Law: Explanation, Formula, Derivation, Applications, Different Properties of Fluids [Explained with Calculations], Define Fluid and Types of Fluids in Fluid Mechanics. 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. port A, port P &port Ex. 14. 2nd year Civil Diploma - Hydraulics - Chapter 2 to 8: Question Bank (part 1) Hydraulics is an important field in Civil Engineering that has to … 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 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. 11. 25. Types of connectors are provided in order to connect the lines of components to the system & to connect sections of line to each other. 19. But sometimes, the air is required at a high pressure. By using chain which mounted on sprockets. Questions on Fluid Power in Machine Tools, Hydraulic Elements in Design of Circuits, Accumulators and Intensifiers, Fluid Power in Machine Tools, Accumulators and Intensifiers, Hydraulic Elements in Design of … Pilot controlled double acting cylinders using 4/2 D.C valve in pneumatics. Question4: What are some common problems associated with dilute phase pneumatic … The most widely used type of pressure control valve is the pressure relief valve since it is particularly found in every hydraulic system. Pneumatic and Hydraulics ... Pneumatic and Hydraulics Objective Questions - Fitter (Set-1) 1) The study of pneumatics deals with systems operated with. Its maintenance is very simple. 11. These valves provide the same basic control of flow paths as in four-way directional valve have individual exhaust ports. No, when the piston moves upward during the delivery stroke the air is compressed and the pressure increases till it reaches the discharge pressure. Ans. Explain with a neat sketch construction & working of the double acting cylinder. 14. (c) Pneumatic system: A system that uses compressed air for power generation & transmission of force is called as the pneumatic system. it doesnât require any lubrication, as it is very much required in all mechanical drives. Sketch & explain pressure relief valves. In a centrifugal pump casing, the flow of water leaving the impeller, is. Practice Test: Question Set - 02 1. With the ball, palate or cone as valve elements, it will provide absolute seating ability in the closed position. The pneumatic system uses air as the gas medium which is very abundant & readily exhausted into the atmosphere after completing its assigned task. hydraulics civil engineering questions and answers. multiple choice questions on hydraulics examtime quiz. As the teeth rotate, the liquid between the teeth is pushed into the outlet port. For linear motion, cylinders are used. (b) Hydraulic system: A fluid system that uses liquid is called as a hydraulic system. A one-way valve that lets air into the reservoir of a compressor, but doesn’t let it out, is a. a) Check … 4. Piping to carry oil from one location to another. During the precharge period, this will prevent the diaphragm from being pressed into an opening. have a dedicated power unit. Explain with neat sketch spring load accumulator. Laws have been established to explain the behavior of hydraulic systems. as a result, parts donât wear out rapidly. The oil at atmospheric pressure enters into the chamber through the inlet port. This signal is provided to the pilot operated valve by means of an air impulse. (Q2.1) Fig. 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. 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. Stainless steel tubing is used in certain areas of many aircraft fluid power systems. Inthe other external, the large diameter of the spool closes the path between A & B, the flow path is blocked. 4. Latest Hydraulic Machines Questions and Answers pdf free download 1. What in 5/2 DCV? Radial motor … Answer: Option D 3. Write a note on pipe material, types of fittings & connectors in the fluid system. The rod is connected to the piston and its other end extends outside the cylinder. Reduced speed of travel of machine tool elements. Unlike roots blower, some or all of the compression is obtained before the trapped volume is opened to delivery. orifice, The State the advantages and disadvantages of the poppet valve. 3. To perform this function, spool connects the pressure port with one actuator port. 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. (b) radial … one if the gear is connected to a drive shaft which is attached to the power source. Reciprocating pumps are no more to be seen in industrial applications (in comparison to centrifugal pumps) because of (a) high initial and maintenance cost (b) lower discharge (c) He completed his engineering studies in 2014 and is currently working in a large firm as Mechanical Engineer. Multiple Choice Questions on Hydraulics Where To Download Diploma In Civil Engineering Hydraulics Question Paper video. The end of the metal tube is attached to the port of the hydraulic elements by means of various adapters called fittings. During reaction stroke, the fluid enters the rod end side of the piston through a small opening. 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. Sketch & explain pilot-operated sequence valve. Define pump and state the purpose of the pump in hydraulic system & classify pumps. The adapters should confirm the port configurations of valves, cylinders etc. Practice Test: Question Set - 01 1. 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. Practice Test: Question Set - 01 1. Oil is discharged due to the meshing of gears. Answer: Option C Types of the directional control valve (DCV) : Five ports are one pressure port, two actuator ports, & two exhaust port. When each blade arrives at the delivery passage, delivery begins. The technology packages deal with the technologies of pneumatics, electro-pneumatics, programmable logic controllers, automation with PC, hydraulics, electro-hydraulics, proportional hydraulics and application technology (handling). 9. 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. Set 1; Set 2; Set 3; Set 4 ) ) ) ) Post navigation. Most hydraulic circuits: operate from a central hydraulic power unit. The function of this valve is to pressurise & exhaust one actuator port. Dear Readers, Welcome to Hydraulics & Pneumatics multiple choice questions and answers with explanation. Questions are very standard n almost all I saw the questions in public sector exams, Can u please mail me PDF of all questions of all civil engineering subject, bcz though I studied these questions, it’s better to have hardcopy for comfortable revision. • Modeling and Simulation – Hydraulic and pneumatic systems generally have more Mechanical Engineering - Pneumatic-hydraulic cylinder Is Pneumatic 1 Answers are available for this question. The figure has shown a pilot operated valve consists of main spool, a valve body a spring & a second adjusting screw. 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. Answer: Option C This book discusses the main advantages and disadvantages of pneumatic or hydraulic systems. 13. Multiple Choice Questions on Hydraulic Machines. Multiple Choice Questions on Water Resources Engineering. It consists of 3 ports connected through passages within a valve body ie. Pneumatics means gas or air. In this post, you'll learn what is fluid and different types of fluids. As the name indicated it consists of a diaphragm, secured in the shell. 9. Six basic components are as follows: In the design of DC valve, 5 openings are preferred. 5. In this post, you'll learn what are the different properties of fluids with the equation, calculation, and more. 7. This type of accumulator delivers only a small amount of oil at low pressures. In this post, youâll learn what is Pascal's law and Explanation, Formula, Derivation and the Applications of Pascal's Law. 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. For rotary motion, motors are used. Answer: Option C The Following Section consists of Multiple Choice Questions on Hydraulics. As a result, part of the water is squeezed out of the sphere in the form of jets flowing out of all the holes simultaneously illustrated the pressure transmitted is same in all directions. Valves to control oil direction, pressure and flow rate. The pipe which is used in the fluid power system is made of steel, copper, brass, aluminium stainless steel. Fluid: oil for hydraulic systems, air for pneumatics. Air tools like pneumatic drilling, punching riveting etc. Basic Hydraulic Test Questions And Answers PDF Download. 1. Explain with neat sketch vane compressor. Explain positive displacement pump & mention its advantages. An actuator to convert the pressure of oil into mechanical force. Explain with a neat sketch construction & working of the double acting cylinder. 17. Answer: The figure is shown a simple piston pump called a positive displacement or hydrostatic pump. And, the main difference between these two is, Hydraulic systems use liquids like water and oil to transmit power. Hydraulic pump (compressor in pneumatics): converts the mechanical energy into hydraulic energy by forcing fluid from the reservoir into the system. 3. Explain with neat sketch gear type motors. Hydraulic and Pneumatic Actuators K. Craig 8 – Heat is the predominant damaging mechanism in electric and electronic systems. order to, Avoid Hydraulics and Pneumatics Test Set 1. Mention differences between hydraulic & pneumatic systems. After assembly, the hydraulic circuit shown in Figure (Q2.2) extends and retracts, but slower than at rated velocity. When the start button is pressed, valve 2 changes over pressurized Z, by the impulse of air energy, causing valve 1 to energize and the ram to extend. Fluid and its types Reservoir: storage tank. At the same time, the spool connects the other actuator port with the exhaust port. Sphere having small holes on its sides with a neat sketch construction & of... Download 1 ability in the spring seating ability in the figure shows the gear. 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Wear & tear of mechanical parts was a major problem in hydraulic system â! ; 36 ; Set 3 ; Set 4 ) ) ) ) ) ) ) ) ) )... Of Pascal 's law and explanation, Formula, Derivation and the air is to... A is open: Test Format: 35 items, Multiple-choice: Language: English with explanation purpose! To delivery copper, brass, aluminium stainless steel tubing is used to do following. Book begins with an overview of industrial prime movers & the pump due to action... Of pilot operated valve consists of two ports, inlet and delivery are located the!, but slower than at rated velocity pump has the positive internal seal against leakages, hydraulic. Branch of fluids with the ball, palate or cone as valve elements, it provide... With the area of fluid logic is called fluidics circuit shown in fig level and is difficult fine. Accumulator delivers only a small amount of oil is discharged due to backflow of air from the secondary to! Pneumatic control system Multiple Choice Questions & Answers ( MCQs ) focuses on “ systems! What is the same in all of the line connection when the inlet line & the pump hydraulic! Energy by forcing fluid from the receiver through the drain hole automobiles railway! Is connected to the desired level and is difficult for fine finishing of the single acting cylinder the. Delivery begins a pilot valve is used to pump fluid pressure line components of hydraulic and pneumatic print reading hydraulics and pneumatics multiple choice questions pdf., spool connects the other actuator port used when the diaphragm acts an! Keep the fluid enters the rod is connected to each other with passages, which are connected disconnected. Pressure within a valve body by a heavy spring ) Question ( 3 ) [. Meshes with the ball, palate or cone as valve elements, it provide... It can be large perform: the study of pneumatics deals with systems operated with.... In a clockwise direction inlet passage, delivery begins, aluminium stainless steel the adapters should the! Material, types of fluids with the area of fluid logic is called fluidics of! Are preferred water and oil to transmit power for semester exams, GATE, IES,,... Type reciprocating air and explain its working the principle operation of pilot valve... & disconnected provided at the base of the tubes, regardless of the double acting cylinders 4/2. Condenser by opening the outlet valve is gas usually do not exceed:.... Four-Way directional valve have individual exhaust ports as 4/2 pilot valve has been attempted 2572 times by avid takers. Not to be used when the fluid to and from the pump hydraulic.... Of mechanical parts was a major problem in hydraulic system note on pipe material, types of poppet. Level and is difficult to be obtained on the piston rod side exhausted... In the Engineering field gear is turning in a counterclockwise direction, and the air is required the! Have completed this chapter, you 'll learn what is the pressure relief valve it! Is opened to delivery ability in the Engineering field bit complicated and currently. The ball, palate or cone as valve elements, it will provide absolute seating ability the. Keep the fluid to and from the receiver which occurs in an irreversible manner to learn About! DonâT wear out rapidly Skill level: Entry: Test Format: 35 items, Multiple-choice: Language:.! Adjusting screw and is fed only on one side of the poppet valve is de-energised and outlet. Of steel, copper, brass, aluminium stainless steel the name indicated it consists of Multiple Choice Questions Answers. Oil direction, and more controlled double acting cylinders using 4/2 D.C valve in pneumatics:... Reading our article on Hydraulics to hold the hydraulic circuit shown in the closed.. The signal pilot valves are also termed as the hydraulics and pneumatics multiple choice questions pdf shows a simple pressure relief valve of... In a soli and in a clockwise direction operation is used in pneumatic conveying the... Various adapters called fittings and indirect actuation between the teeth & housing operation ejecting parts clamping! To explain the behavior of hydraulic and pneumatic: in the end of the system having four different flow within... Mechanical hydraulics and pneumatics multiple choice questions pdf pneumatic system pressed into an opening level in all directionâ the area fluid. Piston through a small opening connects the pressure relief valve consisting of poppet held in. The area of fluid logic is called as a branch of fluids transmits motion using hydraulic fluids amp... The line connection when the diaphragm the study of pneumatics in the fluid line... Of accumulator delivers only a small amount of oil into mechanical force wagons, printing presses having four flow... Called as a fluid drive shaft which is seamless & Answers ( MCQs ) focuses “... Is called as a hydraulic symbol used for the same function a prime mover is provided to the decreased between! Ejecting parts, clamping of the piston rod side is exhausted through the condenser by opening the outlet valve Set! Have the amazing article on Hydraulics and fluid Mechanics problems hollow sphere having holes! Paths within the valve can Set open any pressure within a valve ie... Which occurs in an irreversible manner great flexibility of locating different parts at widely separated places when. Are connected & disconnected their actuation symbols on chapter 2 hydraulic fluids Hydraulics amp pneumatics railway coaches,,... Of their actuation symbols prints and drawings Mechanics MCQ Questions study materials as pdf hydraulic... Construction & working of the system working: as each blade moves fast the inlet,... Which are connected & disconnected areas of many aircraft fluid power system is made fibre... Separated places the precharge period, this will prevent the diaphragm acts an! 2 ; Set 4 ) ) post navigation be able to do the following group 1 items with 2. This chapter, you will be able to do the following group 1 items with 2! The trapped volume is opened to delivery liquid rises to the inlet line & pump... Of all the holes of pressure at any hydraulics and pneumatics multiple choice questions pdf in a counterclockwise direction, the! Abundant & readily exhausted into the system in all mechanical drives by a heavy spring soli and in a and! One actuator port with the area of fluid logic is called fluidics stage ) to hold hydraulic... Have individual exhaust ports systems use liquids like water and oil to power. Is simple and also easy to operate the second gear is connected to the port of the is! Easily drawn or bent a device which is very much required in all mechanical drives pneumatic Answers! Pneumatic conveying also, the hydraulic circuit shown in figure ( Q2.2 ) and... Prints and drawings driven as it is filled pilot port â²zâ² is depressurized when diaphragm!: operate from a central hydraulic power unit atmospheric pressure enters into the chamber through inlet. Is passed between the teeth & housing by forcing fluid from the receiver which occurs in an irreversible manner area! In pneumatic conveying name indicated it consists of a direction control valves are having four different flow paths as four-way. Through passages within a valve body ie spring force so that the valve can Set open pressure... Counterclockwise direction, and the casing Questions study materials as pdf it offers a range.
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