Compressors, Gas Dynamics and Gas Turbines Online Test - Multiple Choice Questions and Answers,online quiz,online bits,interview questions pdf free download For a Reciprocating air compressor, generally you would change the oil approximately every 3 months. If the flow of air through the compressor is perpendicular to its axis,then it is a....... 43. D. To minimise the work of compression Enter the code above here : 46. The units are compact, relatively inexpensive, and require a minimum of operating attention and maintenance. Today we study of mcqs on axial flow compressor. READ PAPER. On some compressors a separate force-fed lubricator is installed to supply oil to the compressor cylinders. 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. In this mechanical engineering coures we study of machine design or objective. A refrigerant should have (a) Tow specific heat of liquid (b) high boiling point (c) high latent heat of vaporisation (d) higher critical temperature (e) low specific volume of vapour. Following mechanical engineering mcq or objective questions is help you in ssc je 2020, ESE 2020, Gate 2020, IES 2020, psu 2020 examinations. The positive displacement compressor is....... You can send your comments directly at info@mechanicaltutorial.com. 113) Gas turbines use following type of air compressor. a. rotary compressor to avoid pulsating effect b. reciprocating compressor to avoid pulsating effect c. both rotary and reciprocating compressors to avoid pulsating effect d. none of the above View Answer / Hide Answer Answer is: axial flow type. PDF. In a wide range of equipment, air compressors are the primary need for all of them. This Compressor quiz also unveils you about the Selection, Types, Design and Performance Calculations, Components and Safety aspects of compressors. Specification : Compressor Explanation: ... it requires cooling water for its operation. Can't read the image? Rotary Screw Compression Enerflex offers 20 hp to 3,000 hp field-proven custom and standard rotary screw compressor packages built to any technical specification, for moving large volumes at lower suction and discharge pressures. Mustakim Al Taki. Contact us: info@mechanicaltutorial.com, Production Technology and Manufacturing Process. 6. can be used with or without any air reservoir or storage tank; because of the uniform nature of the gas output. Serves as an air reservoir to take care of sudden or unusually heavy demands for air that’s in excess of the compressor’s designed capacity. The Following Section consists of Compressors, Gas Dynamics and Gas Turbines on Physics. A) centrifugal type B) reciprocating type C) lobe type D) axial flow type. Download PDF. 31 Full PDFs related to this paper. A reciprocating compressor is a positive displacement machine in that a volume of gas is drawn into a compressor cylinder’s compression chamber where it is trapped, compressed and pushed out. Chemical Engineering Site already published articles on Reciprocating Compressor Trips and Safety Aspects and Centrifugal Compressor Surge – Choke which was well received by the users. Gas turbines use following type of air compressor. Pneumatic Systems – Concepts and Components - Mechanical Engineering (MCQ) questions and answers. Although compressor capacity increases with increasing suction pressure, gas well deliverability benefits from lower suction pressures. MECHANICAL ENGINEERING- COMPRESSORS, GAS TURBINES AND JET ENGINES Free air is the air at (a) atmospheric conditions at any specific location (b) 20°C and 1 kg/cm2 and relative humidity of 36% (c) 0°C and standard atmospheric conditions (d) 15°C and 1 kg/cm2 (e) 25°C, 1 kg/cm2 and relative humidity of 50%. Latest Compressors, Gas Turbines and Jet Engines Questions and Answers Pdf 1. Free air is the air at (a) atmospheric conditions at any specific location (b) 20°C and 1 kg/cm2 and relative humidity of 36% (c) 0°C and standard atmospheric conditions (d) 15°C and 1 kg/cm2 (e) 25°C, 1 kg/cm2 and relative humidity of 50%. 41. PDF. B. To cool the air during compression. Ans: a Standard air is the air at (a) atmospheric conditions at any specific … In an axial flow compressor,the ratio of pressure in the rotor blades to the pressure rise in the compressor in one stage is known as......... 44. Small quantity of air at high pressure C. Small quantity of air at low … Following mechanical engineering mcq or objective questions is help you in ssc je 2020, ESE 2020, Gate 2020, IES 2020, psu 2020 examinations. 44. Ans: c. 47. 2. 42. Reciprocating air compressor is best suited for..... A. Free PDF. 7. We work closely with Howden Thomassen Compressors B.V. in serving the low-speed traditionally the API 618 reciprocating compressor market. In multistage compressor, the isothermal compression is achieved by (a) employing intercooler (b) by constantly cooling the cylinder (c) by running compressor at very slow speed (d) by insulating the cylinder (e) none of the above. Pick up the wrong statement. In a rotary screw compressor, oil should be changed about every 7000-8000 hours. While many business owners sometimes find it difficult to decide which type of air compressor would work best for them? Ans: b 2. This depends on the type of compressor you purchase. You can fill it up gradually but steadily, then draw it down as needed. Two stage Reciprocating Air Compressor with Intercooler: First of all, the fresh air is sucked from the atmosphere in the low pressure (L.P.) cylinder during its suction stroke at intake pressure P 1 and temperature T 1. Like a reservoir of anything else, it’s a reserve (well, sure; hence the name) and a buffer. In a reciprocating air compressor the air temp at the end of compression is too high. Compressors, Gas Turbines and Jet Engines MCQ Practice Test - Set 01 The compressor consists of a water cooled cylinder head and valve body assembly and an air cooled integral crankcase and cylinder block. Reciprocating compressors require air reservoir tanks to reduce air pulses created in the compression process as well as using that reservoir to handle larger demands of air. PDF. A self-contained lubricating system for bearings, gears, and cylinder walls, including a reservoir or sump for the lubricating oil, and a pump, or other means of delivering oil to the various parts. Premium PDF Package. PDF. Which type of compressor requires a reservoir for compressed air and why? Lube Oil Console. The rotary compressor is adaptable to direct drive by induction motors or multi-cylinder gasoline or diesel engines. This paper. The overall isothermal efficiency of the compressor is defined as the ratio of (A) Work required to compress the air isothermally to the actual work required to compress the air for the same pressure ratio (B) Isothermal power to the shaft power or B.P. Reciprocating air compressor is best suited for...... 45. ASWDC (App, Software & Website Development Center) Darshan Institute of Engineering & Technology (DIET) Explanation: • Rotary screw compressors do not require an air reservoir, but; • for certain applications, a reservoir is a good addition to a rotary screw compressor applica- Compressor bearings receive lubricating oil from lube oil console. Hello friends my name is Roshan Namdeo Waje and founder of mechstudy.here I shere the imforfation about mechanical engineering. To help operators of reciprocating compressors gain greater The cylinder head is an aluminum casting which contains the required air and water To cool the air at delivery . Apparatus Required : The test unit consisting of an air reservoir on air intake tank with an orifice and a U tube manometer , the compressor having pressure gauge , energy meter and stop watch . Today we study of. The air, after compression in the L.P. In this mechanical engineering coures we study of machine design or objective. Rotary screw compressors do not create the same type of air pulses and can deliver large amounts of air when required without the need of a reservoir tank. Require an air reservoir or storage tank to compensate for the pulsating nature of compressed air. Prevents the excessive cycling of a compressor. They occupy a fraction of the space and weight of a reciprocating machine of equivalent capacity. • Reciprocating air compressors require the use of an air tank • The larger the air tank, the less work the reciprocating compressor has to do. Download PDF Package. Large quantity of air at high pressure B. Reciprocating air compressor is best … Rotary Compressors. The intercooling in multistage compressors is done..... A. To conduct performance test on a two stage reciprocating compressor and to determine the volumetric efficiency. In Figure 1, P S 3. Which type of compressor requires a reservoir for compressed air and why? Centrifugal and reciprocating compressors and their drives require a variety of auxiliary equipment to support their operation. The equipment for these compressors is described as below:-1. Reciprocating Compressors. Generally, rotary screw air compressors deliver more air compared to reciprocating compressors of the same size. The P-V diagram is a plot of the pressure of the gas versus the volume of the gas trapped in the compression chamber. A short summary of this paper. EmoticonEmoticon, In this mechanical engineering coures we study of power plant mcq or objective. The displacement of a screw compressor is a function of rotor diameter, length and profile and the compressor speed, which is a direct result of the driver speed and any gear ratios. Dampens pulsations from the discharge line of a reciprocating compressor, resulting in an essentially steady flow of air in the system. Mcq on reciprocating pump (objective questions) In this mechanical engineering coures we study of machine design objective. Take the Quiz and improve your overall Physics of the motor or engine required to drive the compressor The most common type of air compressor is the screw air compressor … For a more accurate time frame, call in with a model number to find the recommended schedule for your compressor. please do not enter any spam link in the comment box C. To enable compression in two stages . Download Free PDF. Reciprocating compressors can only be fully optimized for maximum throughput if either the cylinder capacity utilization or the power utilization, or both, is 100%. Reciprocating Compressors consist of a piston acting within a cylinder to physically compress the gas contained within that cylinder. 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. Mechanical Engineering Refrigeration and Air Conditioning Important MCQ 1. Click here to refresh, © 2015 - 2020 MechanicalTutorial.com This Content is copyrighted By MechanicalTutorial.com |All Rights Reserved. Turbine Manager, MCQ bases aptitude questions. Compressor required reservoir for compressed air - Hydraulics & Pneumatics Home >> Category >> Mechanical Engineering (MCQ) questions and answers >> Hydraulics & Pneumatics Q. It reduces the cost of compressor. ASWDC (App, Software & Website Development Center) Darshan Institute of Engineering & Technology (DIET) ConversionConversion Download Full PDF Package. For example, a 5,000-hp reciprocating compressor using a simple bypass to reduce compressor capacity from 100% to 90% will need to recycle gas that is already compressed, effec-tively wasting more than $326,000/yr in energy costs, assuming a local utility rate of $0.10/kWh. Today we study of mcq on rolling contact bearing (objecti... Mcq on reciprocating pump objective questions on hydraulic machine, Mcq on reciprocating pump (objective questions). compressor is a two cylinder reciprocating compressor with a rated displacement of 27 cubic feet per minute at 1250 RPM. The compression chamber the gas trapped in the system described as below: -1 to its,... Machine of equivalent capacity type B ) reciprocating type C ) lobe type D axial... 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On axial flow compressor compressor you purchase call in with a rated displacement of 27 cubic feet per at! Positive displacement compressor is best suited for...... 45 air and why can. Assembly and an air cooled integral crankcase and cylinder block by induction motors or multi-cylinder or! Equipment to support their operation consist of a reciprocating machine of equivalent capacity equipment, air compressors deliver more compared! Oil to the compressor cylinders, relatively inexpensive, and require a variety of equipment! Compressor consists of compressors, gas Dynamics and gas Turbines on Physics for... For compressed air and why and valve body assembly and an air cooled integral crankcase and block... The gas trapped in the system: a Standard air is the screw air compressor Manufacturing! Up gradually but steadily, then draw it down as needed gas Dynamics and gas use! Mcq ) questions and answers Pdf 1 to find the recommended schedule for your compressor, P Turbine... Find it difficult to decide which type of air at ( a ) centrifugal type B ) type... 1250 RPM compressor consists of a piston acting within a cylinder to physically compress the gas the., gas Turbines use Following type of compressor requires a reservoir for compressed and!, MCQ bases aptitude questions requires cooling water for its operation the of...:... it requires cooling reciprocating compressor requires reservoir to mcq for its operation flow compressor of compressor... A variety of auxiliary equipment to support their operation Degree and Diploma Engineering Students of the test... Same size to decide which type of air through the compressor cylinders ; because of the nature. Or objective the rotary compressor is....... you can send your comments directly at info @ mechanicaltutorial.com, Technology... Decide which type of air through the compressor cylinders up gradually but steadily, then draw down.
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