C 20 to 30%. b) p2max/p1 = (1 – 1/C)n d) none of the mentioned MCQ - 03. As clearance and pressure ratio increases, volumetric efficiency ____ a) 1 + C + C(p2/p1)^(1/n) d) 15 degree Celsius, 100 bar (b) 38. A no-load test is performed on a transformer to determine (a) core loss (b) copper loss (c) efficiency (d) magnetising current (e) magnetising current and loss Ans: e. 129. b) flow through machine is maximum 29. MCQ Exam ON : Basics . Deposition of carbon in petrol engine cylinder would result in increase of (a) clearance volume (b) swept volume (c) compression ratio (d) volumetric efficiency (e) mean effective pressure. 6. View Answer, 7. C. Swept volume D. none of the above 11. b) increases To practice all areas of Thermodynamics, here is complete set of 1000+ Multiple Choice Questions and Answers. P/V ratio stands for profit/value ratio. b) Volumetric phase ratio c) Retention factor d) Total porosity. Ans: b. The ratio of the air actually delivered to the amount of piston displacement. SEM - V ICE P a g e | 5 a) increases b) decreases c) first increases, then decreases d) none of the mentioned 25. a) p2max/p1 = (1 + 1/C)n Increase the volumetric efficiency b. Participate in the Sanfoundry Certification contest to get free Certificate of Merit. Marginal costing c. Variable costing d. CUP analysis Ans. is known as, Options are ⇒ (A) mechanical efficiency, (B) volumetric efficiency, (C) isothermal efficiency, (D) adiabatic efficiency, (E) relative efficiency., Leave your comments or Download question paper. The ratio of stroke volume to clearance volume, B. a) true To get maximum flow capacity, compressors are built with maximum practical clearance. a) total volume / swept volume 1. The ratio between the power output of an engine and the energy in the fuel burned to produce that power is called a. Volumetric efficiency b. 1) decreases : 2) increases. The efficiency of an Otto cycle is increased by increasing a) pressure ratio b) compression ratio c) temperature ratio d) none of the mentioned 26. What is the formula for compression (r k) ratio of the Otto cycle? In capillary column, total porosity is 1. View Answer, 8. and brake H.P. View Answer, 5. b) 1 – C – C(p2/p1)^(1/n) MCQ Exam ON : Monoclonal Antibodies . MCQ - 01. The ratio of the indicated thermal efficiency to the air standard efficiency is ... overall efficiency (C) volumetric efficiency (D) relative efficiency. A. Volumetric efficiency is The ratio of the air actually delivered to the amount of piston displacement Which of the following is correct? The ratio of the clearance volume to the displacement volume of a R12 reciprocating compressor is 0.05. a) 1 / ((p2/p1)^(1/n) +1) The ratio of indicated HP to shaft HP is known as..... A. d) clearance volume / swept volume Specific volume at inlet and outlet of compressor are 0.04 and 0.02 m 3 /kg respectively. Volumetric efficiency of the compressor is: Thermal efficiency c. Mechanical efficiency Ans: b. (A) increase (X) (B) decrease (C) remain same (X) (D) may increase/decrease depending on clearance volume (X) (E) none of the above (X) Answers: The vloumetric efficiency of compressor with increase in compression ratio will decrease. b) total volume / clearance volume Volumetric efficiency (VE) in internal combustion engine engineering is defined as the ratio of the mass density of the air-fuel mixture drawn into the cylinder at atmospheric pressure (during the intake stroke) to the mass density of the same volume of air in the intake manifold. View Answer, 6. Low density. (A) increases with increase in compression ratio (X) (B) decreases with increase in compression ratio (X) (C) is not dependent upon compressin ratio (D) may increase/decrease depending on compressor capacity (X) (E) unpredictable (X) Answers: Volumetric efficiency of a compressor without clearance volume is not dependent upon compressin ratio. B 60 to 70%. This set of Thermodynamics Multiple Choice Questions & Answers (MCQs) focuses on “Volumetric Efficiency”. d) 1 / ((p1/p2)^(1/n) +1) (a) 39. The compression ratio for the compressor is always _________ unity. a) true The temperature and pressure conditions at free air delivery are a) 27 degree Celsius, 100 bar b) 15 degree Celsius, 101.325 bar c) 27 degree Celsius, 101.325 bar d) … View Answer, 9. b) 15 degree Celsius, 101.325 bar View Answer, 4. Ans: c. 7. Jan 08,2021 - Refrigerant Compressors - MCQ Test 1 | 20 Questions MCQ Test has questions of Mechanical Engineering preparation. This test is Rated positive by 91% students preparing for Mechanical Engineering.This MCQ test is related to Mechanical Engineering syllabus, prepared by Mechanical Engineering teachers. a. Abruption b. View Answer, 3. Compression ratio of LC. Thermal efficiency will be increased b. Volumetric efficiency will be increased c. Air standard efficiency will be decreased d. Increase the compression ratio c. Bring the fuel quickly in contact with the air d. Increase the specific fuel consumption Ans: c. 36. C. Reciprocal of compression ratio. Question 4. If compression ratio is increased a. View Answer, 2. The clearance volumetric efficiency is equal to d) p2max/p1 = (1 + C)n All Rights Reserved. b) total volume / gas volume taken during suction a) volumetric efficiency is maximum Home >> Category >> Mechanical Engineering (MCQ) questions and answers >> Hydraulics & Pneumatics Q. Volumetric efficiency is the ratio of - Published on 14 Aug 15 c) gas volume taken during suction / swept volume The volumetric efficiency is maximum 1.00 (or 100%). Clearance is given by For a given pressure ratio, volumetric efficiency is zero when maximum clearance is The ratio of the air actually delivered to the amount of piston displacement. The voltage transformation ratio of a transformer is equal to the ratio of (a) primary turns to … The ratio of the actual volume of air taken in the cylinder to the swept volume of the compressor is (A) ... Volumetric Efficiency (D) Compressor ratio (a) the ratio of stroke volume to clearance volume (b) the ratio of the air actually delivered to the amount of piston displacement (c) reciprocal of compression ratio (d) index of compressor performance (e) proportional to compression ratio. a. 1. With increase in compression ratio, the volumetric efficiency of air compressor . With the decrease in compression ratio, the volumetric efficiency. The volumetric efficiency is defined as the ratio of c) p2max/p1 = (1 – C)n 5. 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. a. r k = Volume of cylinder at the beginning of compression / Volume of cylinder at the end of compression b. r k = Volume of cylinder at the end of compression / Volume of cylinder at the beginning of compression c. r k = Volume of cylinder at the end of compression / clearance volume d. none of the above The ratio of stroke volume to clearance volume B. D. Index of compressor performance An automobile engine operates at a fuel air ratio of 0.05, volumetric efficiency of 90% and indicated thermal efficiency of 30 %. Q3. Temperature of gases at end of compression as compared to exhaust gases in a gas turbine is, The maximum temperature in a gas turbine is, Related Questions on Compressors, Gas Turbines and Jet Engines, Compressors, Gas Turbines And Jet Engines, More Related Questions on Compressors, Gas Turbines and Jet Engines. With increase in compression ratio, the volumetric efficiency of air compressor . c) remains constant 21. This set of Thermodynamics Multiple Choice Questions & Answers (MCQs) focuses on “Volumetric Efficiency”. b) 1 / ((p2/p1)^(1/n) -1) c) 27 degree Celsius, 101.325 bar Answer (D ) MCQs of Introduction. (b) low compression ratio (c) low volumetric efficiency (d) minimum turbulence (e) high power output and high thermal efficiency. A. The ratio of stroke volume to clearance volume. Free download in PDF Compressor Multiple Choice Questions and Answers for competitive exams. 227. Jonathanalleyne's interactive graph and data of "A Graph of Volumetric Efficiency versus Pressure Ratio for A Compressor" is a scatter chart, showing Col1 vs Col1 - fit; with Compressor Pressure Ratio in the x-axis and Compressor Volumetric Efficiency/% in the y-axis.. Which of the following is the ratio of length of column packing to dead time? a) total volume / piston displacement volume At this value, the engine is capable of drawing all of the theoretical volume of air available into the engine. The temperature and pressure conditions at free air delivery are © 2011-2021 Sanfoundry. True b. b) false d) 1 + C – C(p2/p1)^(1/n) Sanfoundry Global Education & Learning Series – Thermodynamics. Given that the calorific value of the fuel is 45 MJ/kg and the density of the air at intake is , the indicated mean effective pressure for the engine is (A) 6.075 bar (B) 6.75 bar (C) 67.5 bar (D) 243 bar conditions volume at 0°C and 1 kg/cm2 volume at 20°C and 1 kg/cm2 ⇒ The pressure ratio in gas turbines is of the order of,2:l 4:1 61: 1 9 : 1 1) decreases : 2) increases. View Answer, 10. Volumetric efficiency is..... A. increase efficiency ⇒ The volumetric efficiency of a compressor is calculated on the basis of volume of air inhaled at working conditions volume of air inhaled at N.T.P. At this value, the volumetric efficiency the ratio of stroke volume to the amount of piston displacement engine. Join our social networks below and stay updated with latest contests, videos, internships and jobs ON:.. Explanation: Total porosity volume in the cylinder with the decrease in compression ratio c. Bring the quickly. Isothermal efficiency c. volumetric efficiency ” B. Q3 volume B. 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