Mustakim Al Taki. Free PDF. Generally, rotary screw air compressors deliver more air compared to reciprocating compressors of the same size. PDF. Compressor bearings receive lubricating oil from lube oil console. 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%. Pick up the wrong statement. ASWDC (App, Software & Website Development Center) Darshan Institute of Engineering & Technology (DIET) In Figure 1, P S Take the Quiz and improve your overall Physics If the flow of air through the compressor is perpendicular to its axis,then it is a....... 43. The intercooling in multistage compressors is done..... A. EmoticonEmoticon, In this mechanical engineering coures we study of power plant mcq or objective. Reciprocating compressors can only be fully optimized for maximum throughput if either the cylinder capacity utilization or the power utilization, or both, is 100%. Download Full PDF Package. The compressor consists of a water cooled cylinder head and valve body assembly and an air cooled integral crankcase and cylinder block. You can fill it up gradually but steadily, then draw it down as needed. 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). This depends on the type of compressor you purchase. Latest Compressors, Gas Turbines and Jet Engines Questions and Answers Pdf 1. 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. The Following Section consists of Compressors, Gas Dynamics and Gas Turbines on Physics. The cylinder head is an aluminum casting which contains the required air and water PDF. To cool the air during compression. On some compressors a separate force-fed lubricator is installed to supply oil to the compressor cylinders. We work closely with Howden Thomassen Compressors B.V. in serving the low-speed traditionally the API 618 reciprocating compressor market. • 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- 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. Like a reservoir of anything else, it’s a reserve (well, sure; hence the name) and a buffer. In a wide range of equipment, air compressors are the primary need for all of them. In a reciprocating air compressor the air temp at the end of compression is too high. 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. This Compressor quiz also unveils you about the Selection, Types, Design and Performance Calculations, Components and Safety aspects of compressors. Today we study of. 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. Explanation: ... it requires cooling water for its operation. Enter the code above here : Require an air reservoir or storage tank to compensate for the pulsating nature of compressed air. • Reciprocating air compressors require the use of an air tank • The larger the air tank, the less work the reciprocating compressor has to do. 113) Gas turbines use following type of air compressor. They occupy a fraction of the space and weight of a reciprocating machine of equivalent capacity. 46. C. To enable compression in two stages . Large quantity of air at high pressure B. To help operators of reciprocating compressors gain greater 2. The most common type of air compressor is the screw air compressor … Compressors, Gas Turbines and Jet Engines MCQ Practice Test - Set 01 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. 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 . Reciprocating air compressor is best suited for...... 45. Today we study of mcqs on axial flow compressor. PDF. The air, after compression in the L.P. Which type of compressor requires a reservoir for compressed air and why? The positive displacement compressor is....... You can send your comments directly at info@mechanicaltutorial.com. D. To minimise the work of compression The units are compact, relatively inexpensive, and require a minimum of operating attention and maintenance. Download PDF. Pneumatic Systems – Concepts and Components - Mechanical Engineering (MCQ) questions and answers. Specification : Compressor B. 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. While many business owners sometimes find it difficult to decide which type of air compressor would work best for them? Reciprocating Compressors consist of a piston acting within a cylinder to physically compress the gas contained within that cylinder. 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. Hello friends my name is Roshan Namdeo Waje and founder of mechstudy.here I shere the imforfation about mechanical engineering. A short summary of this paper. 3. Mechanical Engineering Refrigeration and Air Conditioning Important MCQ 1. The equipment for these compressors is described as below:-1. In this mechanical engineering coures we study of machine design 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. ASWDC (App, Software & Website Development Center) Darshan Institute of Engineering & Technology (DIET) 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. Lube Oil Console. Click here to refresh, © 2015 - 2020 MechanicalTutorial.com This Content is copyrighted By MechanicalTutorial.com |All Rights Reserved. Compressor required reservoir for compressed air - Hydraulics & Pneumatics Home >> Category >> Mechanical Engineering (MCQ) questions and answers >> Hydraulics & Pneumatics Q. Download PDF Package. Ans: b 2. 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. To conduct performance test on a two stage reciprocating compressor and to determine the volumetric efficiency. 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 42. compressor is a two cylinder reciprocating compressor with a rated displacement of 27 cubic feet per minute at 1250 RPM. 44. A) centrifugal type B) reciprocating type C) lobe type D) axial flow type. 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. To cool the air at delivery . Explanation: Although compressor capacity increases with increasing suction pressure, gas well deliverability benefits from lower suction pressures. Prevents the excessive cycling of a compressor. Small quantity of air at high pressure C. Small quantity of air at low … 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%. 7. please do not enter any spam link in the comment box PDF. of the motor or engine required to drive the compressor 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. Following mechanical engineering mcq or objective questions is help you in ssc je 2020, ESE 2020, Gate 2020, IES 2020, psu 2020 examinations. Turbine Manager, MCQ bases aptitude questions. Answer is: axial flow type. Centrifugal and reciprocating compressors and their drives require a variety of auxiliary equipment to support their operation. READ PAPER. 6. can be used with or without any air reservoir or storage tank; because of the uniform nature of the gas output. Reciprocating Compressors. Following mechanical engineering mcq or  objective questions is help you in ssc je 2020, ESE 2020, Gate 2020, IES 2020, psu 2020 examinations. Mcq on reciprocating pump (objective questions) 31 Full PDFs related to this paper. This paper. Reciprocating air compressor is best suited for..... A. Download Free PDF. Ans: a Standard air is the air at (a) atmospheric conditions at any specific … Contact us: info@mechanicaltutorial.com, Production Technology and Manufacturing Process. For a Reciprocating air compressor, generally you would change the oil approximately every 3 months. Premium PDF Package. Can't read the image? 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. 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. Which type of compressor requires a reservoir for compressed air and why? In a rotary screw compressor, oil should be changed about every 7000-8000 hours. The rotary compressor is adaptable to direct drive by induction motors or multi-cylinder gasoline or diesel engines. Compressors, Gas Dynamics and Gas Turbines Online Test - Multiple Choice Questions and Answers,online quiz,online bits,interview questions pdf free download ConversionConversion Reciprocating air compressor is best … It reduces the cost of compressor. Dampens pulsations from the discharge line of a reciprocating compressor, resulting in an essentially steady flow of air in the system. In this mechanical engineering coures we study of machine design objective. In this mechanical engineering coures we study of machine design or objective. The P-V diagram is a plot of the pressure of the gas versus the volume of the gas trapped in the compression chamber. For a more accurate time frame, call in with a model number to find the recommended schedule for your compressor. Rotary Compressors. 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. Gas turbines use following type of air compressor. 41. Ans: c. 47. 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. 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