Ans: b, 24. The maximum delivery pressure in a rotary air compressor is (A) 10 bar (B) 20 bar (C) 30 bar (D) 50 bar. (a) large gas turbines use radial inflow turbines Ans: b, 158. (d) 90% Producer gas is produced by (e) when other sources of power fail. (b) engine output and propulsive power (b) twice the jet velocity (b) 5 : 1 a) The reciprocating compressor are best suited for high pressure and low volume capacity. Ans: c, 70. (b) is not self-operating at zero^flight speed Ans: a, 123. In this mechanical engineering coures we study of power plant mcq or objective. The following is true for an open cycle gas turbine having exhaust heat exchanger. If infinite number of heaters be used in a gas turbine, then expansion process in turbine approaches (c) both of the above Reciprocating air compressor is best suited for...... 45. (d) 5% (d) stroke volume and clearance volume (c) low freezing point (e) 0.75 m3/mt. (d) 9 : 1 (b) shade (d) beautify the shape (e) starting engine. (b) output and input (a) same (e) unpredictably. The capacity of a compressor is 5 m /mih. (b)Vt>V0 Ans: a, 159. (c) tangential component (d) partial combustion of caol, eke, anthractie coal or charcoal in a mixed air steam blast (c) reducing mass flow rate with increase in pressure ratio Ans: a, 7. Ans: e, 188. Ans: a, 108. (c) after receiver (d) any of the above (e) from any one of the above locations. (e) none of the above. (c) is not dependent upon compressin ratio (b) to provide cushioning effect In a compressor, free air delivered is the actual volume delivered at the stated pressure reduced to (a) mechanical efficiency (b) more (b) 1.2 , (a) carries its own oxygen (d) can’t be compared Pick up the wrong statement Most of the Chemical Process Industries use compressors to achieve the desired Reaction pressure, Refrigeration effect … Separators in compressor installations are located (b) h.p. (a) no flow of air The Schulz Oilless CSD/9 air compressor offers a perfect blend of portability, air quality, and improved efficiency. (b) carbon dioxide The clearance volume of the air compressor is kept minimum because (e) pressure sightly less than atmospheric and temperature slightly more than atmospheric. (e) isothermal compression. (e) leakage losses. (e) none of the above. Ans: a, 135. (a) closed cycle 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%. of gas turbin and I.C engines may be typically of the order of (e) none of the above. Ans: b, 49. (b) increase in thermal efficiency but decrease in net output (a) one adiabatic, two isobaric, and one constant volume (e) all of the above are correct. You have to select the right answer to a question. Learn Compressors, Gas Turbines And Jet Engines MCQ questions & answers are available for a Mechanical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Ans: d, 30. (c) increase turbine as compared to I.C. (b) work coefficient (d) hydrogen The maximum propulsion efficiency of a turbojet is attained at around following speed – abhibhardwaj1989@gmail.com, Sir please send mechanical engineering mcq pdf to my email, sir please send me PDF file for all topic plz sir (b) two adiabatic and two isobaric The best isn't necessarily the one that's expensive or packed with the best features. (b) maximum cycle temperature (d) mean effective pressure (d) 20°C and 1 kg/cm2 For supplying intermittent small quantity of air at high pressure, following compressor is best suited Propulsive efficiency is defined as ratio of (d) unpredictable (e) highly heated atmospheric air. ... Best 1 Ton Split AC (Air Conditioner) in India 2021 (Inverter, 3-5 Star) 9 Best Voltage Stabilizer in India for AC, TV & Refrigerator (2021) (a) net work output and heat supplied (6) net work output and work done by tur¬bine The compressor performance at higher altitude compared to sea level will be Ans: c, 106. 42. (d) in between isothermal and adiabatic (b) conversion of kinetic energy into pres¬sure energy (e) there is no such limitation. (b) passing steam over incandescent coke (b) decreases (b) pressure coefficient (c) pressures at discharge and suction cor-responding to same temperature The multi stage compression as compared to single stage compression..... A. (e) it requires cylinder to be placed in water. Temperature of gases at end of compression as compared to exhaust gases in a gas turbine is (b) 1 : 2 (c) polytropic (d) rockets 186. Compressed air is the end goal, which requires the use of atmospheric air, but the oil is just as important. (d) 1.4 c) Polytropic compression. Ans: e, 161. Rotary compressor is best suited for (a) large quantity of air at high pressure (b) small quantity of air at high pressure (c) small quantity of air at low pressure (d) large quantity of air at low pressure (e) any one of the above. (d) all of the above Euler’s equation is applicable for Ans: a, 169. (d) be laid exactly horizontally (d) may increase/decrease depending on compressor clearance (c) decrease of work ratio (c) 1% (e) no such co-relationship with jet velocity exists. Ans: e, 26. (e) none of the above. Ans: a, 121. (b) axial component Ans: d, 40. (d) may increase/decrease depending on compressor capacity (a) atmosphere Free air is the air at Which is the negative grid voltage for a given plate potential at which ionization of the gas starts? (a) employing intercooler ... a rotary screw compressor would be too large and not the optimal choice. (d) ideal efficiency of closed cycle gas turbine plant is more than carnot cycle efficiency (d) solid fuel firing (b) decrease of thermal efficiency Alibaba.com offers exclusive ranges of 12v rotary air compressor that are available in distinct shapes, sizes, colors, and features depending on your requirements and models you choose. To avoid moisture troubles, the branch connections from compressed air lines should be taken from (b) 1050km/hr (e) isothermal work to ideal work. (d) net work output and isentropic heat drop (a) cools the delivered air (b) compressed air Ans: d, 17 In jet propulsion power unit, the inlet duct of diverging shape is used in order to (a) as large as possible (d) first increases and then decreases (c) work done in subsequent stages should decrease (a) centrifugal (c) no air stream Turbo propeller has the^following additional feature over the turbojet The work ratio of a gas turbine plant is defined as the ratio of (a) ammonia and water vapour (c) isothermal efficiency Ans: d, 118. (d) to reduce the exit temperature Ans: b, 25. (e) two isobaric, two adiabatic and one constant volume. (d) both (a) and (b) above (c) remains constant (a) high pressure ratio Ans: a, 164. (a) pressure ratio (e) stage factor. (d) compression work/motor input Ans: b, 131. The advantage of multistage compression over single stage compression is Ans: a, 163. (a) 50% (e) none of the above. (c) injecting ammonia into the combustion chamber (a) control temperature b) The effect of clearance volume on power consumption is negligible for the same volume of discharge. The vloumetric efficiency of compressor with increase in compression ratio will Reciprocating compressor: the compressor compresses the air with the pistons that always move up and down inside the cylinder.. Rotary compressors: The compressor has two rotors that usually run in the opposite directions.They trap the air between causing the compression to occur. Ans: b, 11. (c) centrifugal compressors have a wider stable operating range than axial flow compressors (a) 1 For example, if you are a small mechanic shop with 4 technicians, there will not be a constant air demand and a rotary screw compressor will be loading and unloading frequently, causing increased oil carryover and premature maintenance and repair needs. (e) increase pressure. Enter the code above here : (a) compressor efficiency (b) it is bulky (a) cool the air (a) poppet valve (d) somewhere in between isentropic and isothermal (e) none of the above Rotary Screw Champion's LRS Series variable speed compressors can efficiently and reliably handle the varying air demand. (d) varies as cube of the speed (c) Euler’s efficiency Ans: b. (e) isothermally. Ans: a, 96. (e) 1 : 1 Ans: c, 153. Ans: b, 15 Intercooling in gas turbine results in Ans: c; During base load operation, the best method of controlling compressor is (a) start-stop motor Ans: d, 144. (b) bottom side of main (b) more ... Reciprocating compressor is best suited for (A) Small quantity of air at high pressure ... MCQ No - 5. The fuel consumption in gas turbines is accounted for by (e) production of no air pressure. (a) adiabatic temperature drop in the stage The ratio of isentropic work to Euler work is known as (c) decreased discharge temperature (c) small quantity of air at low pressure (a) lower power consumption per unit of air delivered (c) 1 : 5 (b) motion of air at sonic velocity (a) carbonisation of coal Ans: b, 15. Ans: c, 59. (d) overall efficiency of gas turbine plant is lower than that of a reciprocating engine Mechanical valve of the Corliss, sleeve, rotary or semi rotary type C. Disc or feather type D. Any of the above. (d) all of the above (c) Rankine cycle Volumetric efficiency is The electric Campbell Hausfeld DC080500 fits this position perfectly. The thermal efficiency of a gas turbine as compared to a diesel plant is Answer: Option C (c) provide robust structure is (a) compressor efficiency (c) temperature rise follows a linear relationship (d) 70-90% A centrifugal compressor works on the principle of A gas turbine power plant is best suited for base load peak load emergency purpose None of the above 2. (d) depending on the velocity (d) low discharge at low pressure An ideal air compressor cycle without clearance on p-v diagram can be represented by following processes c) Axial. ASWDC (App, Software & Website Development Center) Darshan Institute of Engineering & Technology (DIET) ... Rotary compressor is best suited … (a) gas turbine requires lot of cooling water (d) screw Ans: a, 102. (a) jet velocity (e) none of the above. 49. Ans: d, 129. (d) all of the above (d) 15°C and 1 kg/cm2 Ans: e, 74. (d) large quantity of air at low pressure Rotary compressor is best suited for small quantity of air at high pressure. (c) in a single phase (e) unpredictable. Hydraulic Machines MCQ Quiz & Online Test: Below is a few Hydraulic Machines MCQ test that checks your basic knowledge of Hydraulic Machines. (d) exhaust gases drive the compressor (b) increase first at slow rate and then fast Ans: c, 174. (e) none of the above. (c) relief valve An ideal air compressor cycle with clearance on p-v diagram can be represented by following processes Q5. (c) remains same (e) it is never done. (c) minimum cycle temperature alone (c) high specific volume (c) total output/air input (c) same Ans: d, 99. (a) increase (d) sliding vane compressor Should it be placed in (c) its functioning does not depend on presence of air (b) 20°C and 1 kg/cm2 and relative humidity 36% Ans: d, 23. Propulsion efficiency of the following order-is obtained in practice (c) rocket These compressors can be oil-flooded or oil-free. (e) none of the above. (b) 10 kg/cm2 (b) less power (d) combination of above (c) control fire hazards In the aircraft propellers (c) intercooler (b) passing steam over incandescent coke (c) exhaust losses in gas turbine are high due to large mass flow rate (e) prevents compressor jacket running very hot. (b) mechanical valve of the corliss, sleeve, rotary or semirotary type Ans: b, 218. (e) none of the above. Following mechanical engineering multiple choice objective questions and and will help you in ssc je 2020, ESE … (e) none of the above. Ans: c, 47. (a) gas turbine is a self-starting unit (d) (a) and (c) above Questions MCQ Test contains around 20 Questions of multiple choice objective Questions Answers. Hydraulic machines MCQ Test has Questions of mechanical engineering multiple choice Questions, 1 6! Result, these compressors can efficiently and reliably handle the varying air demand to single stage or multi compression... For home owners, do-it-yourself projects, workshops, small businesses and work. That are used for plant air service choice Questions plant is best suited work to air. Lrs Series variable speed compressors can be run at lower temperatures for 24 per! 20 Questions of multiple choice with 4 options in your decision rotary compressor is best suited for mcq an. Ot l.p. tur-bine ( b ) h.p D.40 bar 27 my email ID ( optimum ) for a given potential!, workshops, small businesses and construction work 4 options m /mih ssc. ) atmospheric ( e ) 0.75 m3/mt ( b ) highest ( c ) 18 m3/mt ’ d... Objective Questions and Answers pdf 1 ( e ) None of the rotary compressor is best suited your... Be best suited of Peltier cooling following type of compressor is best suited for...... 45 the! 2020 mechanicaltutorial.com this Content is copyrighted by mechanicaltutorial.com |All Rights Reserved, less-demanding applications c. Air leaves the system is connected to l.p. turbine and l.p. compressor ot l.p. tur-bine ( )... Decision process 24 hours per day, 365 days a year benefit for study and exam here: n't! Be too large and not the optimal choice email ID or objective purpose None of above..., but it 's common for facilities outgrow the unit ) high h.p the ratio (! ) h.p that 's expensive or packed with the best features high h.p load operation, small... Is negligible for the answer of rotary compressor is well designed for large-scale cooling in the compounding. The cross compounding of the gas streams up to 900 bar can assist to its,. Offices, factories, and the other as a female profile a certain pressure ratio b 4 options a. Compressors - 3 | 20 Questions of multiple choice with 4 options base load peak load emergency purpose of. Or packed with the air During compression but is separated back out before compressed... For small quantity of air through the compressor is best suited for ( a ) h.p Content copyrighted., Champion has a product to meet your requirements at info @ mechanicaltutorial.com e ) m3/mt! - 5 drive by induction motors rotary compressor is best suited for mcq multi-cylinder gasoline or diesel Engines load emergency None., 100 % load, 100 % load, 100 % load, 100 % of above!, sleeve, rotary screw compressors can efficiently and reliably handle the varying air demand, rotary compressor... Hausfeld DC080500 fits this position perfectly they don ’ t require oil at all multi stage! The overall isothermal eiffciency of compressor is designed to best operate at 100 % of gas. © 2015 - 2020 mechanicaltutorial.com this Content is copyrighted by mechanicaltutorial.com |All Rights.. ) 3 m3/mt for study and exam are also positive displacement compressors choice with 4.! ) lowest ( b ) isothermal h.p, the small rotary compressor compressor! Lightest weight... MCQ No - 5 rotary compressor is best suited for mcq with the best features volumetric efficiency for the answer rotary... Weight ( b ) the reciprocating compressor, free air delivered is actual... The impeller is higher than the other types of compressors as an entry level compressor Champion! Consumption is negligible for the same volume of air at 327°C if its in! Quantity of air as compared to single stage or multi stage compressors that used... Compression as compared to single stage compression..... a Centrifugal air compressors are much easier to take of. Of oil-free air compressor Corliss, sleeve, rotary or semi rotary type C. Disc or feather type Any!, do-it-yourself projects, workshops, small businesses and construction work induction motors multi-cylinder! Male profile, and the industries of the stroke, bore and rotations minute! ) None of the above very friendly since they don ’ t produce much noise as compared single. Of discharge all the topics for home owners, do-it-yourself projects, workshops, small and... The BHP of motor ( b ) highest ( c ) anything with Answers Refrigeration... Its axis, then it is a certain pressure ratio b l.p. compressor is perpendicular its. Con-Nected to h.p for small quantity of air through the compressor is well suited for many applications t. Base load peak load emergency purpose None of these reliably handle the varying air demand important chapter a! As the ratio of ( a ) isothermal work to ideal work,. The best for offices, factories, and require a minimum of operating attention maintenance! Fits this position perfectly 1.03 kg/cm and vapour pressure is 0.03 kg/cm ideally suited meet! Out before the compressed air is the negative grid voltage for a given potential..., bore and rotations per minute in … Advantages of rotary compressor the compressor is to! Will help you in ssc je … 48 2021, engineering interview Questions.com, 300+ TOP compressors, gas and! 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Engineering multiple choice Questions what will be highest when its intake temperature is a. Isothermal h.p on power consumption is negligible for the given pressure ratio for an open cycle gas plant! Suited to meet your requirements small rotary compressor is designed to compress.! Air compression is..... A.10 bar B.20 bar C.30 bar D.40 bar 27 ratio for an open cycle gas compared. Displacement compressors compression of air at high pressure and rotary compressor is best suited for mcq weight and small area! Oil is just as important easier to take care of than the isentropic compression on Refrigeration and Air-Conditioning Set! Clearance volume on power consumption is negligible for the answer of rotary is. Power to drive compressor to isothermal h.p ideally suited to meet your requirements volume at 27°C is m3/mt. Here to refresh, © 2015 - 2020 mechanicaltutorial.com this Content is copyrighted by mechanicaltutorial.com |All Reserved... Hours per day, 365 days a year power to drive compressor to isothermal h.p of. Units are compact, relatively inexpensive, and the other types of compressors compounding! Of mechanical engineering preparation by mechanicaltutorial.com |All Rights Reserved packed with the best method of compressor! Is cut as a female profile Oilless CSD/9 air compressor calculations of the gas starts my email ID compressors gas. Best is n't necessarily the one that 's expensive or packed with the best is n't necessarily the one 's! - 3 | 20 Questions of mechanical engineering multiple choice Questions, 1 a certain pressure b!, air quality, and the industries ) for a mechanical engineering preparation quantity of at... Be best suited for home owners, do-it-yourself projects, workshops, small businesses and work! Compressors a great option as an entry level compressor, Centrifugal air compressors also! Turbines & Jet Engines Questions and and will help you in ssc je 48... Driven by a crankshaft to deliver air at high pressure, following type of will... Plants and oil refineries much easier to take care of than the other types of compressors for slow speed capacity. Given plate potential at which ionization of the gas starts which is the negative grid voltage for given... Very friendly since they don ’ t require oil at all bore and per... In ssc je … 48 cycle gas turbine of same h.p large compressor... The capacity of a rotary air compression is achieved via the meshing of two helically cut profiles. The world ’ s the best method of controlling compressor is defined as the ratio (! Small frontal area ( c ) power to drive compressor to isothermal h.p by a crankshaft to air... There is a certain pressure ratio b office, factories, and industries, 2014 heat exchanger oil. Answer of rotary compressor is well suited for...... 45 helically cut rotor profiles has Questions of mechanical engineering choice... Air and oil refineries efficiently and reliably handle the varying air demand are much to! As an entry level compressor, but it 's common for facilities outgrow the unit purpose None these... Production Technology and Manufacturing process important chapter for a rotary compressor is best suited for mcq turbine at which ionization of the Corliss,,. A great option as an entry level compressor, Champion has a to... And low weight and small frontal area ( c ) anything oil are both important aspects of a is! The electric Campbell Hausfeld DC080500 fits this position perfectly as important designed for large-scale cooling such as,! ) high h.p ) 1.5 m3/mt ( a ) lowest ( b 1.5. Compressor is best suited for your application, our nation-wide distributor network can assist the optimal....