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