Dynamic compressors include axial and centrifugal types. Air motor finds application in following except. The reciprocating compressors are.suitable for low discharge (maximum limit 50 m3/min) at high delivery pressures (as high as 1000 bar). Positive displacement air compressor types are, The cross-section of a Bourdon tube is generally. Home >> Category >> Mechanical Engineering (MCQ) questions and answers >> Centrifugal Pumps; 1) Which of the following centrifugal pumps has higher specific speed than the others? engines is not permissible and where high safety is required to bemet as in mining applications. Maintaining constant temperature requires large quantity of coolant water. (i) Centrifugal compressor A.Reciprocating air compressor B.Vane blower C.Centrifugal blower D.Axial flow compressors Related posts: Which of the following is not a positive displacement compressor? Chaper VI -Compressor. ORAL EXAM. There are two main types of superchargers defined according to the method of gas transfer: positive displacement and dynamic compressors. Positive Displacement Compressors (Reciprocating and Rotary) . This mock test of Compressors - 1 for Mechanical Engineering helps you for every Mechanical Engineering entrance exam. These types of air compressors use a piston for compression. a. Axial flow b. positive displacement (PD)• Rotary Sliding Vane Liquid Piston Helical Lobe Screw Reciprocating Mechanical Piston . Then, … Online (MCQ) Practical. Dynamic Displacement Compressors. Holiday schedule. Positive displacement type of compressor b. By continuing, I agree that I am at least 13 years old and have read and agree to the. Continuous flow . The ratio of the air actually delivered to the amount of piston displacement. In positive displacement compression, the air is drawn into one or more compression chambers, which are then closed from the inlet. Positive displacement type includes Root blower, Vane type and Screw type compressors. Navigation. Shift schedules. The concept of fluid head : Introduction; Defining the fluid head; The head required; The head produced; Paths of compression; The different types of gas head; Dynamic compressor curves format ; PERFORMANCE RELATIONSHIPS. Increase of clearance volume decrease the volumetric efficiency, so option (c) is wrong. There is reduction in work required per stroke and therefore the total driving power is also reduced. 30% c. 55% d. 60% e. 70% Answer: E. In an electrostatic precipitator the: a. discharge electrode is negatively charged b. collector electrode is negatively charged c. d... Rotary pumps: a. b) Centrifugal compressor c) Axial flow compressor d) All of the above. Then it reduces the volume of the compression chamber. Large and long overalls. A.Roots blower B.Centrifugal compressor C.Axial flow compressor D.All of the above Related posts: Which of the following is a displacement compressors? Four cycle engine lubrication is usually: Potential Environmental Impact of Liquids, Potential Environmental Impact of Operating Facilities. Which of the following is the non-positive displacement compressor? A positive displacement compressor in the process system; A dynamic compressor in the process system; THE CONCEPT OF FLUID HEAD. A positive displacement compressor, compress the air by forcing air into a compression chamber and by decreasing its volume. mcq on reciprocating compressor In this mechanical engineering coures we study of power plant mcq or objective. Reciprocating compressors have a maximum capacity of, The capacity of a reciprocating air compressor expressed in m3/min refers to volume of, 1 bar pressure, 20°C temperature and 36% RH, atmospheric conditions of pressure and temperature at any specific location, In a reciprocating compressor, one should aim at compressing the air. Please note that tests carried out in accordance with the procedures set out in BS EN 13771-1:2003 shall be accepted as an alternative to those set out in BS EN 13771-1:2016 until further notice. Rather than physically reducing the volume of a captured pocket of air, dynamic displacement compressors instead speed up the air to high velocity, and then restrict the air flow so that the reduction in velocity causes pressure to increase. Q5.Which compressors are suitable for large volume flow rates of above 1200 m3/min a) Centrifugal compressors b) Axial flow compressors c) Both a and b d) None of the above Comparison Between Disc Brake & Drum Brake, TOM, Mechanical Engineering, GATE, Syllabus - Mechanical Engineering : ME, GATE, What is Cams & Followers, TOM, Mechanical Engineering, GATE, Mechanical Properties of Engineering Materials. 1.4.2 Performance metri As the volume of each chamber decreases through the displacement of one or more moving parts, pressure increases. The complete assembly is equipped with a semi-elliptical spring mounting, pneumatic tires, and drawbar. Dynamic compressors do not deliver pressure at low speeds; above a threshold, speed pressure increases exponentially. In this, the air draws from the inlet to the compression chamber. Uniform torque and better mechanical balancing. reduce the work input per kg of air delivered. 2. Surge/Stonewall of centrifugal compressor. Small size systems where on and off operation is required 2. An AC electric welding process c. Normally an automatic process d. ... A check valve is a valve that: a. allows flow in one direction only b. allows flow in two directions c. allows flow at regular inter... Solenoid Valves are used in: 1. Gradually the volume of each chamber decreases and the air is compressed internally. Non-positive displacement type includes centrifugal axial flow compressor. Compressor capacity is volume supplied (m 3 … 21. Differential current flow between t... Gantt charts are used to plan: 1. Positive Displacement Compressors Positive displacement compressors draw in and capture a volume of air in a chamber. In positive displacement compression, atmospheric air is drawn into one or more of its compression chambers, which are then closed from the inlet. You can find other Compressors - 1 extra questions, Most suitable choice is (b). The major classifications of compressors are positive displacement and dynamic type. Compressor general components. The clearance volume in a reciprocating compressor is provided to. 10% b. (iii) Dynamic compressor They then reduce the volume of the chamber to compress the air. Isothermal compression requires minimum power input. long questions & short questions for Mechanical Engineering on EduRev as well by searching above. A dynamic displacement compressor compresses the air by imparting the kinetic energy of the rotating parts to the air. www.gtu-mcq.com is an online portal for the preparation of the MCQ test of Degree and Diploma Engineering Students of the Gujarat Technological University Exam. students definitely take this Compressors - 1 exercise for a better result in the exam. C. Reciprocal of compression ratio. Engineering :: Turbo machines @ : Home > Mechanical Engineering > Turbo machines. Low pressure and medium pressure b. Reciprocating Piston Compressors, Rotary Screw Compressors, Rotary Vane Compressors, and Scroll Compressors are all positive displacement compressors. ASWDC (App, Software & Website Development Center) Darshan Institute of Engineering & Technology (DIET) As the volume of each chamber decreases, the air is compressed internally until the pressure reaches the designed build-in pressure ratio. increase the volumetric efficiency of the compressor. Q10.All of the following are positive displacement compressors EXCEPT a) Screw compressor b) Axial flow compressor c) Roots blower d) Vane blower. Positive displacement compressors are usually of the reciprocating piston type, in which the gas is drawn in during the suction stroke of the piston, compressed by decreasing the volume of the gas by moving the piston in the opposite direction, and, lastly, discharged when the… Your name: Your Email: Your Comments: You can send your comments directly at info@mechanicaltutorial.com. They are oil-free by nature, and some are oil-less. Low pressure, medium pressure, and high pressure c.... A clamp-on ammeter measures current flow by using: a. Shunting current through a milli-ammeter b. All of the following are positive displacement compressors EXCEPT : Which of the following is a positive displacement rotory compressor? This contains 10 Multiple Choice Questions for Mechanical Engineering Compressors - 1 (mcq) to study with solutions a complete question bank. E. Both A and D View Answer . Today we study of mcqs on axial flow compressor. This test is Rated positive by 93% students preparing for Mechanical Engineering.This MCQ test is related to Mechanical Engineering syllabus, prepared by Mechanical Engineering teachers. Q4.Which of the following is NOT a type of rotary compressor? Covers compressor motors, control, and protection. Compressor (centrifugal & reciprocating) principles of operation. Today, we’ll take a look at different types of compressors that use positive displacement compression. D. Index of compressor performance View Answer . Dynamic compressors divided into Radial and Axial. A positive displacement compressor is the system which compresses the air by the displacement of a mechanical linkage reducing the volume (since the reduction in volume due to a piston in thermodynamics is considered as positive displacement of the piston). Roots blower compressor. E.Both A and D Your Comments. Rotary compressors are positive and non positive displacement compressors. Fuel gas systems as the latching valve 3... Fluidized bed boilers can successfully burn coal with ash contents as high as a. Books. Which type of rotary compressor is used in oil fired furnaces? The 600 ft3/min, portable air compressor is a single cylinder, sliding vane, oil-cooled, positive displacement rotary compressor, connected through a friction disk clutch to a heavy-duty industrial diesel engine. Which of the following refrigerant compressor is not classified as positive displacement compressor Which of the following is not a positive displacement compressor? Course Outline ; types of compressors. multiple choice questions in basic mechanical engineering on topic of Turbo machines for interview, entrance test and competitive examination freely available to download for pdf export Mcq on reciprocating pump (objective questions) accommodate valves in the cylinder head of the compressor. The solved questions answers in this Compressors - 1 quiz give you a good mix of easy questions and tough questions. Incorporate a positive displacement type, hermetic or semi hermetic compressor (with integral electric motor). A) Improves volumetric efficiency for the given pressure ratio B) Reduced work done per kg of air C) Gives more uniform torque D) All of these 13. A positive displacement air compressor works by drawing air into a compression chamber through an intake and mechanically reducing the volume of the chamber through motion until a set pressure is reached. create turbulence in the air to be delivered. B. Centrifugal compressor. Are low-pressure pumps b. Air conditioning ducts are classified as: A clamp-on ammeter measures current flow by using: Fluidized bed boilers can successfully burn coal with ash contents as high as. Today we study of objective or mcq reciprocating compressor. EduRev is a knowledge-sharing community that depends on everyone being able to pitch in when they know something. Loading... Unsubscribe from Learn Mech? Mechanical Engineering Cancel Unsubscribe. The positive displacement compressor working principle is very simple. Steady flow compressor c. Both a. and b. d. None of the above Power Engineering | Multiple Choice | Questions and Answers | Test bank | Chapter, The cross-section of a Bourdon tube is generally a) circular b) round c) cylindrical d) spherical e) oval Answer: E. Air conditioning ducts are classified as: a. Ejector Axial . D. Vane blower compressor. Positive Displacement Compressors Positive displacement compressors have mechanical parts which draw in gas in steps of discrete volume from the inlet of the compressor. Jan 09,2021 - Compressors - 1 | 10 Questions MCQ Test has questions of Mechanical Engineering preparation. Your name: Your Email: Your Comments: You can send your comments directly at info@mechanicaltutorial.com. 3. Dynamic Radial / Centrifugal Mixed . multiple choice questions in basic mechanical engineering on topic of Turbo machines for interview, entrance test and competitive examination freely available to download for pdf export . Answer Explanation ANSWER: Axial flow . The positive displacement compressor is..... A. Example of non-positive displacement compressor: ... Displacement Refrigerant Compressors and Condensing Units”. The compressed air is then discharged through a valve at the rated pressure, providing a flow of air. Performance relationships : … Radial flow c. Mixed flow d. All have same specific speed. Concludes with a lesson on preventive maintenance for compressors as well as troubleshooting and repair. Compressed air is used in a wide variety of applications where the use of electric motors or S.l. Positive displacement blowers and compressors deliver an almost constant level of pressure increase at all engine speeds (RPM). Positive displacement can be further divided in to (a) Reciprocating (b) Rotary. a. mcq no - 5 The positive displacement pumps work on the principle of (A) the liquid is discharged due to the positive displacement Explanation: No explanation is available for this question! The increase in the pressure of the gas is due, at least in part, to the compressor pumping it at a mass flow rate which cannot pass through the outlet at the lower pressure and density of the inlet. In case of positive displacement compressors increase the pressure of air/gas by reducing the volume. Positive Displacement and Non-Positive Displacement Compressor ~ Briefly In Hindi Learn Mech. Positive displacement compressors draw air into one or more of their compression chambers. Which of the following is not the advantages of multi-stage compression? Isothermal compression through most efficient cannot be realized in practice because that necessitates, placing the cylinder in a stream of water. (ii) Axial flow compressor 42. Centrifugal and axial compressors are dynamic compressors. (iv) Blade compressor, Reciprocating compressors are usually preferred for. Compression ratio is the ratio of pressure after compression to pressure before compression. Positive displacement air compressor types are Power Engineering Chapter 75. Use of large coolant water makes compressor bulky and decreases the engine speed. Pneumatic breakers, picks, spades, rammers, vibrators, riveters etc. Hair dryer is either battery or electrically powered. a) Positive displacement type of compressor b) Steady flow compressor c) Both a and b d) None of the above. The first one includes, for example, reciprocating (piston) compressors, orbital (scroll) compressors and different types of rotary compressors (screw, tooth, vane). Put another way, a positive displacement compressor is one which operates by drawing in a discrete volume of gas from its inlet then forcing that gas to exit via the compressor's outlet. Positive displacement compressors work with a constant flow regardless of outlet pressure. B.The ratio of the air actually delivered to the amount of piston displacement Your Comments. Power Engineering MCQ Power Engineering Chapter 75 Positive displacement air compressor types are. 4. Following mechanical engineering multiple choice objective questions and and will help you in ssc je 2020, ESE 2020, Gate 2020, IES 2020, psu 2020 examinations. Following mechanical engineering mcq or objective questions is help you in ssc je 2020, ESE 2020, Gate 2020, IES 2020, psu 2020 examinations. Day to day operation of the p... Submerged arc welding is: a. an oxyacetylene welding process b. form a range of hand tools having wide use in construction work. C. Axial flow compressor. This action reduces the volume of the gas, increases the pressure of the gas and discharges the gas from the outlet of the compressor. All of the following are positive displacement compressors EXCEPT : Screw reciprocating Mechanical piston compressor bulky and decreases the engine speed explanation: No explanation is available this. 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