ATM 1122 – Basic Hydraulics and Pneumatics Module 1: Introduction to Hydraulics 9 4 Fundamental laws of Hydraulics All hydraulic systems operate following a defined relationship between area, force and pressure. For linear motion, cylinders are used. Hydraulic and pneumatic circuits: perform the same way for all functions. 6. 2. Explain Basic methods of transmission of power in brief. What in 5/2 DCV? In spring-loaded accumulator, the piston is preloaded with a spring. A pump converts mechanical energy into hydraulic energy. multiple choice questions on hydraulics examtime quiz. Hydraulic pump (compressor in pneumatics): converts the mechanical energy into hydraulic energy by forcing fluid from the reservoir into the system. Pilot controlled double acting cylinders using 4/2 D.C valve in pneumatics. Types of connectors are provided in order to connect the lines of components to the system & to connect sections of line to each other. Following are the 7 main difference between hydraulics and pneumatic: In hydraulics and pneumatics, hydraulics is liquid and pneumatics is gas. An electric motor or another power source to drive the pump. Dear Readers, Welcome to Hydraulics & Pneumatics multiple choice questions and answers with explanation. Content Areas ... [PDF] . components of hydraulic and pneumatic operating systems. Explain with neat sketch vane compressor. Thus the atmospheric pressure pressurizes to force the fluid through the inlet line & the pump. Spring applies force on the piston. At the same time, the spool connects the other actuator port with the exhaust port. A case is covering the gears and two cover plates enclosing the ends of the gears. Compressed air is used to do mechanical work to produce motion & to generate forces. water. The diaphragm acts as an elastic separator between the oil and gas.A shut off button is provided at the base of the diaphragm. An adjacent screw is provided to vary the spring force so that the valve can set open any pressure within a specified range. Ans: Hydraulic system: It uses the liquid as its medium. At this stage discharge valve opens and the air is delivered to the container and once again the same cycle is repeated. A. Pneumatic-electric elements B. He completed his engineering studies in 2014 and is currently working in a large firm as Mechanical Engineer. The piston is manufactured by ductile iron. For rotary motion, motors are used. Laws have been established to explain the behavior of hydraulic systems. 25. 3. one if the gear is connected to a drive shaft which is attached to the power source. 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. Once pump starts, the gears also start meshing with each other causing the tooth space of the gears is evacuated one after the other. (c) Pneumatic system: A system that uses compressed air for power generation & transmission of force is called as the pneumatic system. 14. 8. This set of Control Systems Multiple Choice Questions & Answers (MCQs) focuses on “Pneumatic Systems”. not to be compared to a hydraulic symbol used for the same function. They are secured to the barrel by tie rods. It generates forces & transmits motion using hydraulic fluids. 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. To perform this function, spool connects the pressure port with one actuator port. Fluids display properties such as. Fluid: oil for hydraulic systems, air for pneumatics. A tank (reservoir) to hold the hydraulic oil. Since the pump has the positive internal seal against leakages, the oil positively discharges into the outlet port. (a) rectilinear flow. 5. With the ball, palate or cone as valve elements, it will provide absolute seating ability in the closed position. pneumatics and hydraulics exam questions and answer pdf. It states that âThe intensity of pressure at any point n a fluid at rest, is the same in all directionâ. Hydraulics and Pneumatics: A Technician's and Engineer's Guide provides an introduction to the components and operation of a hydraulic or pneumatic system. It provides the great flexibility of locating different parts at widely separated places. Common faults in the hydraulic systems are: Ans. Valves to control oil direction, pressure and flow rate. 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). Basic Hydraulic Test Questions And Answers PDF Download. Blades are mounted on the slotted rotor and are usually non â metallic, made of fibre or carbon. Organized into eight chapters, this book begins with an overview of industrial prime movers. 5. air. 250+ Pneumatic Interview Questions and Answers, Question1: What types of pneumatic conveying systems are typically used? Fluid and its types The poppet valve is simple and also easy to operate. use air-over-oil power units. Question3: What are some common problems associated with dense phase pneumatic conveying? Most hydraulic circuits: operate from a central hydraulic power unit. Oil pressure is fed only on one side of the cylinder either during extension or retraction. Pneumatics means gas or air. 2. This is a test of the ability to read hydraulic and pneumatic prints and drawings. pneumatic and hydraulic questions yahoo answers. 8. Practice Test: Question Set - 01 1. Multiple Choice Questions on Hydraulics Where To Download Diploma In Civil Engineering Hydraulics Question Paper video. 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. Friction Clutches Objective Practice Test 1. 3) The liquid flows into the large container at the bottom, pressure pushes the liquid equally up into the tubes above the container. U-packing is used to prevent leakage between the piston & the barrel. Explain positive displacement pump & mention its advantages. Answer: Option C 2nd year Civil Diploma - Hydraulics - Chapter 2 to 8: Question Bank (part 1) Hydraulics is an important field in Civil Engineering that has to … Compression begins due to the piston is effected by built-in spring or by of... Calculation, and the fluid can be defined as a result, parts donât out. By a pilot operated valve is classified into 3 types depending upon the function of valve.: it uses the liquid rises to the container in which it is very abundant & readily exhausted the. 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Was a major problem in hydraulic & pneumatics Multiple Choice Questions and Answers pdf free download 1, made steel... Limited compared to that of hydraulic and pneumatic print reading: Skill level: Entry: Test Format 35! System Multiple Choice Questions and Answers pdf free download 1 operation of pilot operated consists! Fluid through the valve can Set open any pressure within a specified range level in all of seats... Elements, it will provide absolute seating ability in the hydraulic system: it uses the liquid rises to pump. Single acting cylinder is used to move the valve can be defined as a hydraulic?! A wide range of speed control which is used as a hydraulic system system! And once again the same time, the water spurts out of all the holes ) radial … Here find. Any lubrication, as it is required at a high pressure subscribe to our newsletter to receive updates direct your! The 7 main difference between these two is, hydraulic systems are: ans question4: are! The outlet valve our newsletter to receive updates direct to your Gmail operation or solenoid, a two-stage process pilot... And gas.A shut off button is provided at the same level in all of the shape or angle the! Amazing quiz About pneumatic Engineering quiz which has been attempted 2572 times by avid quiz.! Main operating valve which is attached to the container and once again the same cycle is repeated …... In every hydraulic system having high resistance to corrosion & easily drawn or bent )... Amount of oil into mechanical force transmit power return movement of the poppet valve is used to do the:... And gas.A shut off button is provided to the power is off air from the receiver which occurs an! Fluid into the system at atmospheric pressure pressurizes to force the fluid enters the back of... Valves are also termed as the figure systems generally have more difference between Hydraulics and pneumatic operating.... 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