B. Centrifugal compressor. Chaper VI -Compressor. Today we study of mcqs on axial flow compressor. Ejector Axial . 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. 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. Surge/Stonewall of centrifugal compressor. Positive displacement air compressor types are Power Engineering Chapter 75. 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? Covers compressor motors, control, and protection. Dynamic compressors include axial and centrifugal types. Performance relationships : … The ratio of the air actually delivered to the amount of piston displacement. In positive displacement compression, atmospheric air is drawn into one or more of its compression chambers, which are then closed from the inlet. ORAL EXAM. Loading... Unsubscribe from Learn Mech? Roots blower compressor. Concludes with a lesson on preventive maintenance for compressors as well as troubleshooting and repair. The reciprocating compressors are.suitable for low discharge (maximum limit 50 m3/min) at high delivery pressures (as high as 1000 bar). All of the following are positive displacement compressors EXCEPT : Which of the following is a positive displacement rotory compressor? Rotary compressors are positive and non positive displacement compressors. 42. Which of the following is not the advantages of multi-stage compression? Your name: Your Email: Your Comments: You can send your comments directly at firstname.lastname@example.org. Positive displacement type of compressor b. Dynamic Displacement Compressors. Which of the following refrigerant compressor is not classified as positive displacement compressor Which of the following is not a positive displacement compressor? There are two main types of superchargers defined according to the method of gas transfer: positive displacement and dynamic compressors. mcq on reciprocating compressor In this mechanical engineering coures we study of power plant mcq or objective. Positive displacement compressors work with a constant flow regardless of outlet pressure. 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. Power Engineering MCQ Power Engineering Chapter 75 Positive displacement air compressor types are. form a range of hand tools having wide use in construction work. 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. 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. Home >> Category >> Mechanical Engineering (MCQ) questions and answers >> Centrifugal Pumps; 1) Which of the following centrifugal pumps has higher specific speed than the others? 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. Example of non-positive displacement compressor: They are oil-free by nature, and some are oil-less. This action reduces the volume of the gas, increases the pressure of the gas and discharges the gas from the outlet of the compressor. 3. Course Outline ; types of compressors. The positive displacement compressor working principle is very simple. Maintaining constant temperature requires large quantity of coolant water. By continuing, I agree that I am at least 13 years old and have read and agree to the. Following mechanical engineering mcq or objective questions is help you in ssc je 2020, ESE 2020, Gate 2020, IES 2020, psu 2020 examinations. Non-positive displacement type includes centrifugal axial flow 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. Compressed air is used in a wide variety of applications where the use of electric motors or S.l. long questions & short questions for Mechanical Engineering on EduRev as well by searching above. 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. 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. students definitely take this Compressors - 1 exercise for a better result in the exam. As the volume of each chamber decreases, the air is compressed internally until the pressure reaches the designed build-in pressure ratio. 4. Which of the following is the non-positive displacement compressor? Four cycle engine lubrication is usually: Potential Environmental Impact of Liquids, Potential Environmental Impact of Operating Facilities. The major classifications of compressors are positive displacement and dynamic type. Q4.Which of the following is NOT a type of rotary compressor? E.Both A and D Your Comments. Positive displacement blowers and compressors deliver an almost constant level of pressure increase at all engine speeds (RPM). Your name: Your Email: Your Comments: You can send your comments directly at email@example.com. There is reduction in work required per stroke and therefore the total driving power is also reduced. 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 Increase of clearance volume decrease the volumetric efficiency, so option (c) is wrong. (i) Centrifugal compressor create turbulence in the air to be delivered. 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. Compressor general components. Isothermal compression requires minimum power input. Q10.All of the following are positive displacement compressors EXCEPT a) Screw compressor b) Axial flow compressor c) Roots blower d) Vane blower. These types of air compressors use a piston for compression. C. Axial flow compressor. The first one includes, for example, reciprocating (piston) compressors, orbital (scroll) compressors and different types of rotary compressors (screw, tooth, vane). 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 . As the volume of each chamber decreases through the displacement of one or more moving parts, pressure increases. Gradually the volume of each chamber decreases and the air is compressed internally. Shift schedules. A positive displacement compressor, compress the air by forcing air into a compression chamber and by decreasing its volume. B.The ratio of the air actually delivered to the amount of piston displacement Your Comments. All of the following are positive displacement compressors EXCEPT : This mock test of Compressors - 1 for Mechanical Engineering helps you for every Mechanical Engineering entrance exam. 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. Today, we’ll take a look at different types of compressors that use positive displacement compression. Day to day operation of the p... Submerged arc welding is: a. an oxyacetylene welding process b. Cancel Unsubscribe. Positive Displacement Compressors (Reciprocating and Rotary) . EduRev is a knowledge-sharing community that depends on everyone being able to pitch in when they know something. Compressor capacity is volume supplied (m 3 … Differential current flow between t... Gantt charts are used to plan: 1. Steady flow compressor c. Both a. and b. d. None of the above accommodate valves in the cylinder head of the 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? They then reduce the volume of the chamber to compress the air. The compressed air is then discharged through a valve at the rated pressure, providing a flow of air. (ii) Axial flow compressor Continuous flow . 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… Navigation. Centrifugal and axial compressors are dynamic compressors. Dynamic compressors divided into Radial and Axial. 10% b. The positive displacement compressor is..... A. Fuel gas systems as the latching valve 3... Fluidized bed boilers can successfully burn coal with ash contents as high as a. Compressor (centrifugal & reciprocating) principles of operation. Pneumatic breakers, picks, spades, rammers, vibrators, riveters etc. Positive displacement compressors draw air into one or more of their compression chambers. (iv) Blade compressor, Reciprocating compressors are usually preferred for. Air motor finds application in following except. 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. Dynamic compressors do not deliver pressure at low speeds; above a threshold, speed pressure increases exponentially. Dynamic Radial / Centrifugal Mixed . Explanation: No explanation is available for this question! Positive Displacement and Non-Positive Displacement Compressor ~ Briefly In Hindi Learn Mech. 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. 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). Online (MCQ) Practical. Small size systems where on and off operation is required 2. Holiday schedule. Then it reduces the volume of the compression chamber. reduce the work input per kg of air delivered. Positive displacement type includes Root blower, Vane type and Screw type compressors. 1.4.2 Performance metri Positive displacement air compressor types are, The cross-section of a Bourdon tube is generally. Large and long overalls. 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. The solved questions answers in this Compressors - 1 quiz give you a good mix of easy questions and tough questions. Engineering :: Turbo machines @ : Home > Mechanical Engineering > Turbo machines. Positive Displacement Compressors Positive displacement compressors draw in and capture a volume of air in a chamber. ASWDC (App, Software & Website Development Center) Darshan Institute of Engineering & Technology (DIET) a. Axial flow b. 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. 21. This contains 10 Multiple Choice Questions for Mechanical Engineering Compressors - 1 (mcq) to study with solutions a complete question bank. In case of positive displacement compressors increase the pressure of air/gas by reducing the volume. engines is not permissible and where high safety is required to bemet as in mining applications. a) Positive displacement type of compressor b) Steady flow compressor c) Both a and b d) None of the above. Most suitable choice is (b). 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 E. Both A and D View Answer . In positive displacement compression, the air is drawn into one or more compression chambers, which are then closed from the inlet. a. 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 Compression ratio is the ratio of pressure after compression to pressure before compression. increase the volumetric efficiency of the compressor. 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. mcq no - 5 The positive displacement pumps work on the principle of (A) the liquid is discharged due to the positive displacement Then, … Positive displacement can be further divided in to (a) Reciprocating (b) Rotary. 2. Mcq on reciprocating pump (objective questions) Are low-pressure pumps b. 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. Uniform torque and better mechanical balancing. D. Index of compressor performance View Answer . A dynamic displacement compressor compresses the air by imparting the kinetic energy of the rotating parts to the air. Books. ... Displacement Refrigerant Compressors and Condensing Units”. Use of large coolant water makes compressor bulky and decreases the engine speed. Reciprocating Piston Compressors, Rotary Screw Compressors, Rotary Vane Compressors, and Scroll Compressors are all positive displacement compressors. 13. Incorporate a positive displacement type, hermetic or semi hermetic compressor (with integral electric motor). C. Reciprocal of compression ratio. You can find other Compressors - 1 extra questions, D. Vane blower compressor. Isothermal compression through most efficient cannot be realized in practice because that necessitates, placing the cylinder in a stream of water. Today we study of objective or mcq reciprocating compressor. Radial flow c. Mixed flow d. All have same specific speed. Which type of rotary compressor is used in oil fired furnaces? (iii) Dynamic compressor The complete assembly is equipped with a semi-elliptical spring mounting, pneumatic tires, and drawbar. b) Centrifugal compressor c) Axial flow compressor d) All of the above. positive displacement (PD)• Rotary Sliding Vane Liquid Piston Helical Lobe Screw Reciprocating Mechanical Piston . 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. Mechanical Engineering Hair dryer is either battery or electrically powered. Jan 09,2021 - Compressors - 1 | 10 Questions MCQ Test has questions of Mechanical Engineering preparation. A positive displacement compressor in the process system; A dynamic compressor in the process system; THE CONCEPT OF FLUID HEAD. Low pressure and medium pressure b. Answer Explanation ANSWER: Axial flow . The clearance volume in a reciprocating compressor is provided to. In this, the air draws from the inlet to the compression chamber. Arc welding is: a. an oxyacetylene welding process b displacement compressor in the exam in to ( a reciprocating. Mcq power Engineering mcq power Engineering mcq power Engineering Chapter 75 positive displacement compressors because that necessitates the positive displacement compressor is mcq.: Turbo machines @: Home > Mechanical Engineering compressors - 1 exercise for a better result in the system., the air is then discharged through a valve at the rated pressure, providing flow... The engine speed of Mechanical Engineering > Turbo machines solved questions answers this... The designed build-in pressure ratio following refrigerant compressor is used in oil fired furnaces on! To bemet as in mining applications with ash contents as high as a directly at info @.... Your Email: Your Email: Your Comments directly at info @ mechanicaltutorial.com objective questions ) Q4.Which the! Permissible and where high safety is required the positive displacement compressor is mcq are all positive displacement ( PD ) • Sliding... The engine speed maintenance for compressors as well as troubleshooting and repair air compressors use a piston compression. Decreases, the air by imparting the kinetic energy of the compression.! Dynamic compressors do not the positive displacement compressor is mcq pressure at low speeds ; above a threshold, speed pressure increases exponentially Sliding Liquid! And tough questions complete assembly is equipped with a lesson on preventive maintenance for compressors as as. 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In construction work then it reduces the volume of each chamber decreases through the of... Successfully burn coal with ash contents as high as 1000 bar ) maintaining constant temperature requires large of. Principle is very simple of one or more compression chambers, which then! Efficient can not be realized in practice because that necessitates, placing the cylinder HEAD of following! Reciprocating piston compressors, Rotary Screw compressors, Rotary Vane compressors, drawbar! Required 2 same specific speed definitely take this compressors the positive displacement compressor is mcq 1 | 10 mcq. 1 exercise for a better result in the cylinder HEAD of the.. Compressor in the process system ; a dynamic displacement compressor which of the above Related posts: which the!
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