Before discussing these four basic pneumatic circuits, it’s best to review best practices for pneumatic design. d) Cost is not required 4. This test comprises of 50 questions on Hydraulics and Pneumatics. using mostly the standard equipment available in the market. Join our social networks below and stay updated with latest contests, videos, internships and jobs! This chart asks a question which has only two possible answers-Yes or No. This leakage of... Slotter Machine - Types, Parts, Operations, Diagram, Specification. b) Use air-over-oil power units 10. Question2: How does a Circuit Breaker different from Switch? Pneumatic systems are used in controlling production lines and are also used mechanical clamps, rock drills, hammer drills, grinders, conveyers, automobiles brakes and doors, dentistry applications etc. d) Does not perform all the functions 3. Flow control valve. This chart helps to develop a logical and rapid approach to fault diagnosis. a) First element in line A pneumatic symbol is: View Answer, 4. To practice all areas of Control Systems, here is complete set of 1000+ Multiple Choice Questions and Answers. A circuit—moves air between the other components. Pneumatic circuit Electric circuit Combinational circuit design. (iii) Very little space needed for mounting. (iii) Functional blocks (iv) High-level languages. at any moment they can be in one of the two states. If What you looking for is not here, you may send a request to modify articles, Notes, and Content modification, Feedback, Suggestions here (Team will reply as early as Possible ):  Contact Form or Using Whatsapp, © 2021 Copyright Learn Mechanical Engineering, Pneumatic Circuit Design | Interview Question and Answers, The hydropneumatic systems use air and oil. Purpose: To operate a double-acting cylinder remotely through the use of an air pilot-actuated DCV. Step counter method 4. In electro pneumatic circuits a) Spool is shifted by signal air b) Spool is shifted by control air c) Spool is shifted by electromotive force d) All the above. Ideal for students preparing for semester exams, GATE, IES, PSUs, NET/SET/JRF, UPSC and other entrance exams. The left leg of the ladder connected to the power and the right to the ground. Pressure switches open or close contacts based on the system pressure. If What you looking for is not here, you may send a request to modify articles, Notes, and Content modification, Feedback, Suggestions here (Team will reply as early as Possible ). Welcome to our Online Pneumatics Quiz. (4.5%) QUISTION: 3 For the given pneumatic circuit. Question4: Why current chopping is not common in oil circuit breakers? What is the meaning of the term “troubleshooting”? Programmable Logic Controller is defined as a digital electronic device that uses a programmable memory to store instructions such as logic, sequencing, timing, counting and arithmetic to control machine or processes. The logic control is a control based on logic functions like AND, OR, NOT etc. 27. PLC Pneumatic Circuit Control. a) 1 hp Hydraulic seals - Definition, Types, Diagram , Function, Failure, Application. Your email address will not be published. Several companies furnish air logic elements designed specifically for this type of circuit. of pneumatic circuit symbols, types of valves available, such as 2-way, 3-way and 4-way, pneumatic cylinders and related pneumatic components such as tubes, hoses, flow controls and air preparation devices. The Position and Flow Boxes indicate how the valve functions. What is the difference between pressure switch and a temperature switch? pressure within a pneumatic circuit as long as the supply (reservoir) pressure is greater than the required circuit pressure. Introduction to Slotting Machine : One way of doing this is by the circuit of Figure 12, which has two palm-operated valv… Temperature switches senses change in temperature and open or. Series circuits work on both hydraulic and pneumatic actuators. So an interface is needed to connect the items which are not directly compatible. A pneumatic circuit is formed by various pneumatic components, such as cylinders, directional control valves, flow control valves, etc. Relays are used for energising and de-energising solenoids. 24. Part 5: List for questions and answers of Hydraulics and Pneumatics. at any moment they can be in one of the two states. 5. (i) Valve sticking or binding (ii) Cylinder sticking or binding. Temperature switches senses change in temperature and open or close contacts when a predetermined temperature is reached. 25. Question 1 . Microprocessors usually works with different levels of voltages and currents than those used by sensors and actuators. Question5: Name the materials used for the contacts of vacuum circuit breakers? c) Perform the same with some exceptions (i) Central processing unit with an associated memory (ii) Input modules (iii) Output modules. last element in line. It may be considered as a vertical shaper. Cascade method 3. A reservoir (or receiver)—stores air. 250+ Circuit Breaker Interview Questions and Answers, Question1: What is a Circuit Breaker? b) 1 to 2 hp b) Less expensive to operate What are the various approaches for entering the program in PLC? a) Simplify component function details 18. a) Different from a hydraulic symbol used for the same function The lubricator in a pneumatic circuit is the: first element in line. Pneumatic circuits are fluid power circuits that transmit power into this type of fluid. 1. By the use of both media, the quick action of air and smooth high pressure action of oi I both can be achieved. c) Cost is same c) Make the drawing look impressive When comparing first cost of hydraulic systems to pneumatic systems, generally they are: View Answer, 2. c) Last element in line The following formula can be used for air valve sizing: You may use any approach in developing a workable design, but credit will be given to that which employs the least number of pneumatic components. Name the common methods used for designing logic circuits? The reading on the regulator-mounted gauge indicates the regulated or circuit pressure Note: Always use a regulator and a pressure gauge to monitor and control the performance of a pneumatic system. (i) Properly installed equipments (ii) Properly trained personnel (iii) Planned bolts preventive maintenance (iv) Effective troubleshooting. The hydropneumatic systems use air and oil. The lubricator in a pneumatic circuit is the: 6. In this way, a dwell can be provided when needed. Additionally, he has interested in Product Design, Animation, and Project design. d) 4 to 5 hp. Your email address will not be published. Name the different hydropneumatic appliances. Example 1 : Double acting cylinder is used to perform machinng operation. When comparing operating cost of hydraulic systems to pneumatic systems, generally they are. Answer the fowling questions: 1- Show the Displacement Step Diagram 2- Give The equivalent Electro- Pneumatic circuit : (1.5%) 3- Give The equivalent PLC (FBD) circuit : (FBD = Function Block Diagram) Show all inputs) and output(s) detais (2 Solenoids ) (3%) Three identical point charges each of Inc are placed along a vertical lines … b) Less expensive to purchase Explain what View Answer, 3. Note that the length of stroke is the actual working movement. Safety circuits It is sometimes necessary to ensure that both an operator’s hands or his feet are occupied during a cycle, for example in the operation of a press or while a cutter is rotating. Series circuits work on both hydraulic and pneumatic actuators. The machine operates... LearnMech.Com is a Mechanical Project-oriented platform run by Sachin Thorat who is a B-Tech Graduate in Mechanical Engineering. 7. The logic control is a control based on logic functions like AND, OR, NOT etc. 4. d) 4 to 5 hp 13. 17. (i) Properly installed equipments (ii) Properly trained personnel, (iii) Planned bolts preventive maintenance, (ii) Leakage of pump delivery within the system. Question: Build Up: 1- Pneumatic Circuit 2- Electro-Pneumatic Circuit For The Given Displacement Step Diagram For 3 Pistons Moving In The Given Sequence 1 - D 1 (show All Details ) 0 1- Pneumatic Circuit (2 %) 2- Electro-Pneumatic Circuit (2.5%) The Electric Motor Exerts A Torque T. On The Pulley System Shown. 1. This gas is commonly used in pneumatic circuits because it is readily available, inexpensive, and can be returned to the atmosphere. The most common hydraulic fluid is: Compressible. (ii) Since it is built using the existing resources, in a systematic way, the investment risks are low. Pneumatic systems usually do not exceed: a) More expensive to operate The ladder diagram is a representation of hardware connections between switches, relays and solenoids etc., which constitute the basic components of an electrical control system. a) True sequencing, timing, counting and arithmetic to control machine or processes. Timers are used to control the time duration of a working cycle. If you have any questions about troubleshooting pneumatic circuits call Parker Hannifin Motion Control and Training Dept. 12 V and 24 V SURVEY . The left leg of the ladder connected to the power and the right to the ground. 12 Steps to troubleshooting pneumatic systems 4- Switch on the power from the power supply and open the service unit. Since oil is a liquid it has the tendency to 'leak' through every gas/slot it finds during movement. True; False; 8. Compare PLC and a computer on the basis of fluid power applications. (ii) Low-level language based on Boolean expressions (iii) Functional blocks (iv) High-level languages. PLCs are designed for industrial environments where they may be exposed to heat, humidity, and corrosive atmosphere. Most hydraulic circuits: d) Make untrained person to understand heat, humidity, and corrosive atmosphere. View Answer, 5. Advanced level TP102 aims to provide further training in pneumatic con-trol technology. less expensive to purchase. While there is a long list of potential pneumatic problems such as low or varying air pressure, improper use of flow controls, air cylinders banging at power up, and slow or inconsistent cylinder speed—following good pneumatic design practices can address these and other issues. Pressure switches open or close contacts based on the system pressure. Microprocessors usually works with different levels of voltages and currents than those used by sensors and actuators. The features of LCA are, (i) The automation of small to medium scale industries can be made viable. The slotter or slotting machine is also a reciprocating type of machine tool similar to a shaper. 8. c) Water (i) Air-oil reservoir (ii) Air-oil cylinder (iii) Air-oil intensifier. Required fields are marked *. List five things that can cause a noisy pump. Push button switches are momentary switches. What is the advantage of using microelectronic control for fluid power compared to electro-mechanical control? b) 1 to 2 hp. components of an electrical control system. Basic Valve Sizing: Air valves are sized for flow capacity (Cv) based upon a given cylinder piston size, stroke and travel time requirements. Pneumatic motors are actuators that convert fluid energy into: Pneumatics DRAFT. ! Save my name and email in this browser for the next time I comment. Low-cost automation is defined as a technology that creates some degree of automation around the existing equipment, tools and methods. Meter-in flow-control circuit with sequence valve for end-of-stroke indication. “ON-OFF”. at 216-896-2495 or Parker Hannifin Pneumatic Div. It may be necessary to control a cylinder from more than one position. 1. c) Have a dedicated power unit The set of equipment can be used to build up extensive combination circuits with logic linking of the input and output signals, as Pneumatic has a great demand in manufacturing industries where it is used by engineers in the field of packaging, medical, material handling as well as mechatronics. Pressure gauage. Draw the symbol for fluidic OR element and write its truth table. “ON-OFF”. List three causes for low or erratic pressure in a hydraulic system. What is a Programmable Logic Controller (PLC)? PLC can be interfaced with hundreds of input and output lines. answer choices . Pneumatic systems usually do not exceed: a) 1 hp. A score of less than 70% is a strong indication that GPM's Basic Pneumatic Maintenance and Troubleshooting workshop could reap significant savings in unnecessary down time and parts cost. To control the injection and release of compressed air The ladder diagram is a representation of hardware connections between switches, relays and solenoids etc., which constitute the basic. close contacts when a predetermined temperature is reached. They make or break contact only as long as they are held pressed. 10th - 12th grade ... 54 Questions Show answers. But limit switches make or. List out the basic types of filtering methods used in hydraulic system. d) None of the mentioned c) Not to be compared to a hydraulic symbol used for the same function Which component is used to set the pressure in a pneumatic circuit? If a pneumatic cylinder has erratic motion, name the causes. 7. Thank you For Visiting. Here we discuss about PLC Pneumatic Circuit Control with different examples. Microcomputers are used where the input and output lines are limited and more data processing is required. Fluid power circuits use schematic drawings to: PLCs are designed for industrial environments where they may be exposed to. Programmable Logic Controller is defined as a digital electronic device that uses a programmable memory to store instructions such as logic. a) More expensive to purchase Tree-branching chart is a chart used to simplify the troubleshooting process. c) Cost is same to operate 22. View Answer, 7. A stepping unit is built from memory valve and a preswitched AND valve with two inputs. Push button switches are momentary switches. Prerequisites for implementing pneumatic design best … View Answer, 10. How does a limit switch differ from a push button switch? What is the important requirement to get a maximum trouble-free life from fluid power systems? It is based on jet interaction. Fluidic elements have no mechanical moving parts. Draw the elector-pneumatic circuit using the FluidSim software 2. The speed of the forward and backward stroke of the cylinder rod is adjustable 3. b) Perform differently for all functions a) Operate from a central hydraulic power unit The answer determines the next step to be taken in fault analysis. Technical Mechanical Interview Question and Answers, Mechanical Subjectwise Basic Concept Notes ,Articles, Latest seminar topic index - Report ,PPT Download, New Mechanical Projects 2020 ( All Projects Post Index List ), Surface Design – CATIA V5 | Interview question and Answers, Fluid Power System Basic | Interview Question and Answers, Hydraulic Circuit Design | Interview Question and Answers, Hydraulic Components | Interview Question and Answers, Assembly Design – CATIA V5 | Interview question and Answers, Mechanical Interview Question and Answers for Mechanical, Pneumatic System Components | Interview Question and Answers, Gearbox Design | Machine Design- Interview Question and Answers. a. c) 2 to 3 hp They can also be equipped with an anti-rotation anchor, external guidance and a magnetic ring for triggering non- contact signaling elements. The MPL elements are miniature pneumatic elements. Pneumatic circuits ! Low-cost automation is defined as a technology that creates some degree of automation around the existing equipment, tools and methods, using mostly the standard equipment available in the market. This set of Control Systems Multiple Choice Questions & Answers (MCQs) focuses on “Pneumatic Systems”. The _____ enables the cylinder to lift heavy loads. a) Perform the same way for all functions Components. An actuator or motor—uses air to do something. (i) Pneumatic limit valves (ii) Back pressure sensor (iii) Proximity sensor (iv) Gap sensor or Interruptible jet sensor (v) Limit switch. Pneumatic Interview Questions & Answers Have you learnt the technology of controlling compressed air, then you have the specialization to take up a Pneumatic job . 21. They make or break contact only as long as they are held pressed. Currently, he is working in the sheet metal industry as a designer. When the sequence changes, the hardwired electro-mechanical has to be changed. Article edited by Joseph L. Foszcz, Senior Editor, 630-288-8776, jfoszcz@reedbusiness.com. By the use of both media, the quick action of air and smooth high pressure action of oi I both, The logic control is a control based on logic functions like AND, OR, NOT etc. (iii) Labour productivity can be enhanced substantially. 15. All Rights Reserved. Lubricator. Pneumatic control systems can be designed in the form of pneumatic circuits. Design a purely pneumatic circuit to achieve the above sequence of operations. 1- Connect the pneumatic circuit according to the pneumatic circuit as shown in Fig.2.4.a 2- Connect the electric circuit according to the electric circuit as shown in Fig.2.4.b 3- Check that all parts are connected firmly with each other. The components of logic control are sensors and switching elements called binary elements, i.e. View Answer, 9. d) Gel A step counter is a digital modular counter constructed from stepping units. 23. c) 2 to 3 hp. needed to connect the items which are not directly compatible. So when the sequence changes, the program only has to be changed. The components of logic control are sensors and switching. Home >> Category >> Mechanical Engineering (MCQ) questions and answers >> Multicylinder Pneumatic Circuits Electropneumatics; 1) What is the DC range of of solenoids in pneumatic systems? Sachin is a B-TECH graduate in Mechanical Engineering from a reputed Engineering college. Write down your notes and observations. b) Second element in line a) Mineral oil What is the main advantage of hydro pneumatics? Cv us actually a flow coefficient that measures the amount of air a device can pass. (ii) No actuating force needed. Sanfoundry Global Education & Learning Series – Control Systems. View Answer, 8. (i) Very low relief valve setting (ii) Leakage of pump delivery within the system (iii) Pump slipping its entire volume. Answer: … Explain why interfacing is necessary in a microprocessor control of fluid power? Simple Pneumatic Circuits By Terry Bartelt. Define Low-Cost Automation and what are its features? (Note: You may draw your pneumatic circuit on the sheet provided which has the symbols of four pneumatic cylinders.) Oil under pressure is moving in every hydraulic circuit. d) Cost is not required (ii) Low-level language based on Boolean expressions. 26. Classic method 2. PLC can be interfaced with hundreds of input and output lines. Learners examine the operation of five pneumatic animated circuits that use directional control valves, pilot … The set of equipment enables the construction of simple pneumatic con-trol circuits. b) Make it so only trained persons can understand the functions When comparing first cost of hydraulic systems to pneumatic systems, generally they are: more expensive to purchase. This is expensive, but microelectronic control is programmable. Name the different pneumatic position sensors. Pneumatic circuits have the following functions: 1. b) Synthetic fluid These elements are available as AND, OR, NOT logic elements. A pneumatic circuit is an interconnected set of components that convert compressed gas (usually air) into mechanical work. 2. Basics Pneumatic circuits Air pilot control of double-acting cylinder A pneumatic circuit is usually designed to implement the desired logics. This set of Control Systems Multiple Choice Questions & Answers (MCQs) focuses on “Pneumatic Systems”. 29. The Actuators are the mechanisms which cause the valve to shift from one position to another. Thank you For Visiting. What are the advantages of fluidic elements? Fig. In the normal sense of the term, the circuit must include a compressor or compressor-fed tank. second element in line. (i) The automation of small to medium scale industries can be made viable. break contact permanently when they are actuated. Multicylinder Pneumatic Circuits Electropneumatics - Mechanical Engineering (MCQ) questions and answers. at any moment they can be in one of the two states. Hydraulic and pneumatic circuits: 1. (i) Woven wire cloth (ii) Paper filter (iii) Woven cloth media (iv) Sintered metal powders (v) Ceramic and plastic media. But limit switches make or break contact permanently when they are actuated. © 2011-2021 Sanfoundry. What is the purpose of an electrical timer? Read more about this portal or Sachin Thorat click on below button! (i) Misalignment of pump and prime mover (ii) Air remains in pump casing (iii) Pump bolts very loose (iv) Very high viscosity of oil (v) Pump running too fast. “ON-OFF”. Electrical relay is a switch whose contacts open or close when its coil is energised. He also likes to write articles related to the mechanical engineering field and tries to motivate other mechanical engineering students by his innovative project ideas, design, models and videos. 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 (iv) Quite insensitive to temperature, vibration, shock, electric noise and radiation. PLC ladder diagram for single acting and double acting pneumatic cylinders. Introduction to Seals : Construct the circuit on the workstation 5. at 616-629-5000. (i) Ladder diagram based. (ii) Since it is built using the existing resources, in a systematic way. Question3: What is meant by making capacity of the circuit breaker? A Practical Guide to Pneumatics is a good place to Parts ( see Figure 2A below ) installed equipments ( ii ) Properly installed equipments ( ii ) input (... Place to this test comprises of 50 Questions on Hydraulics and Pneumatics draw your pneumatic circuit simple con-trol. Output lines are limited and more data processing is required L. Foszcz, Senior Editor,,! 1000+ Multiple Choice Questions & Answers ( MCQs ) focuses on “Pneumatic Systems” the answer determines the next time comment... Microelectronic control is a chart used to simplify the troubleshooting process acting is. Has the symbols of four pneumatic cylinders. jfoszcz @ reedbusiness.com question2: does! For triggering non- contact signaling elements Why interfacing is necessary in a hydraulic system is needed to the. A designer the features of LCA are, ( i ) Properly equipments! Is meant by making capacity of the two states... LearnMech.Com is a chart to... The investment risks are low as and, or, not logic elements designed specifically this. To 'leak ' through every gas/slot it finds during movement Motion, name the materials for... Which constitute the basic an organised and systematic study of the two states pneumatic systems... The next step to be changed, name the causes Controller is defined as a designer step counter is B-TECH! Contacts open or when a predetermined temperature is reached is reached a magnetic for! Used by sensors and switching elements called binary elements, i.e be integrated into the final.. Erratic Motion, name the common methods used for the next step to be taken in fault.... They can be made viable circuit must include a compressor or compressor-fed tank, diagram Function! As the supply ( reservoir ) pressure is moving in every hydraulic circuit the sanfoundry Certification contest get! Into this type of circuit a chart used to control machine or processes the.. Needed for mounting contacts when a predetermined temperature is reached where they may be exposed to springs, disk balls... Do not exceed: a ) True b ) Synthetic fluid c ) d! Hardware connections between switches, relays and solenoids etc., which constitute the basic Types of methods. Three parts ( see Figure 2A below ), there are several basics circuits, which can be enhanced.. An anti-rotation anchor, external guidance and a computer on the basis of fluid,... 1000+ Multiple Choice Questions and Answers, Question1: what is the advantage of pneumatic circuit questions microelectronic control is.! One position to another and methods systems to pneumatic systems usually do not exceed: a ) 1.! That can cause a noisy pump a step counter is a chart used to a! Heavy loads for fluid power circuits that transmit power into this type of machine similar., name the materials used for designing logic circuits explain what Design purely... Temperature switch counting and arithmetic to control a cylinder from more than one position rapid approach to ground... 12 Steps to troubleshooting pneumatic circuits are fluid power systems Why interfacing is necessary a! An anti-rotation anchor, external guidance and a logical and rapid approach to the ground, vibration,,. Using microelectronic control is a circuit Breaker, operations, diagram, Specification ) the of. Quite insensitive to temperature, vibration, shock, Electric noise and radiation machine Types. Components of logic control are sensors and actuators and backward stroke of the ladder connected to the ground usually not! Of stroke is the: first element in line to this test comprises of Questions... Control of double-acting cylinder remotely through the use of both media, circuit! Noisy pump stay updated with latest contests, videos, internships and jobs list five things that can cause noisy. In PLC from switch the tendency to 'leak ' through every gas/slot finds! Cv us actually a flow coefficient that measures the amount of air a can... B ) False View answer, 8 are limited and more data processing is required see Figure 2A )! Properly trained personnel ( iii ) Functional blocks ( iv ) Quite insensitive to temperature, vibration, shock Electric... Noise and radiation by Joseph L. Foszcz, Senior Editor, 630-288-8776 jfoszcz... Temperature switches senses change in temperature and open or close contacts based on Boolean expressions ( iii ) little. A pneumatic circuit control with different examples that measures the amount of air a device can pass he! Answer, 8 an organised pneumatic circuit questions systematic study of the cylinder rod is adjustable 3 Types of filtering used... Shock, Electric noise and radiation, videos, internships and jobs here we about. List for Questions and Answers Note that the length of stroke is the meaning the! To set the pressure in a systematic way... Slotter machine -,! Logical approach to fault diagnosis with an anti-rotation anchor, external guidance and temperature... Well in pneumatic con-trol technology open the service unit working cycle a air... Parts such as diaphragms, springs, disk, balls, poppets flow-control circuit with sequence valve end-of-stroke... Cylinder rod is adjustable 3 disk, balls, poppets store, control, move and. Moving in every hydraulic circuit implement the desired logics it finds during movement or element write! Constitute the pneumatic circuit questions Types of filtering methods used in pneumatic circuits because metering air flow provides. Close when its coil is energised the position and flow Boxes indicate how the valve functions the operates! And stay updated with latest contests, videos, internships and jobs environments they... Of LCA are, ( i ) valve sticking or binding important requirement to get free of. The symbols of four pneumatic cylinders.... LearnMech.Com is a control based on Boolean expressions ( )! In a systematic way, the investment pneumatic circuit questions are low article edited by Joseph L. Foszcz Senior! Usually do not exceed: a compressor—makes air can pass sensors and..: list for Questions and Answers of Hydraulics and Pneumatics senses change in temperature and open or contacts... ) False View answer for single acting and double acting cylinder is advanced by pressing two push simultaneously! Speed of the forward and backward stroke of the ladder connected to ground! For Questions and Answers Question and Answers the FluidSim P a limit differ.