(b) smaller cabinet should be used (c) Precooling and subcooling bf refrigerant are same The basic nature of induction heating is that the eddy currents are produced on the outside of the workpiece in what is often referred to as “skin effect” heating. 39. (b) Decreases The cooling of Earth due to air pollution. (b) decreases COF 23. (e) none of the above. Ans: d Superheating in … (d) None (d) None Ans: d (Ans:b), To improve the COP of a refrigeration system, the sub-cooling in the condenser should be (b) low boiling point (a) increase Water MCQ Questions and Answers Quiz. (d) any value (c) high latent heat of vaporisation (e) none of the above. (d) None (b) Decreases (b) before passing through the condenser (d) constant entropy lines In vapor compression refrigeration, COP is (a) condensation of the refrigerant vapour ... the heating effect will be: A. (a) more (c) is equal to 1 (c) increase cooling effect Brain C. Liver D. Heart Correct answer : B. Which of the following refrigerants has lowest freezing point Series 6: Multiple choice questions (choose the best statement) Exercise 1. (d) before entering the expansion valve The refrigerant for a refrigerator should have (d) concentration of solution coming out of lithium bromide generator is more in comparison to that entering the generator (c) Increase of pressure and volume CBSE Class 10 Science Book Chapter 12 “Electricity” Multiple Choice Questions ‌(MCQs‌) with Answers. (b) commercial refrigerators (a) after passing through the condenser (c) 10 tons Ans: c MCQs from Class 9 Science Chapter 1 - Matter in Our Surroundings are provided here to help students prepare for their upcoming Science exam. (e) before entering the compressor. (b) slightly above atmospheric pressure (a) Carnot cycle Pick up the wrong statement. (d) wet vapour Ans: b Refrigeration is measured in tons of refrigeration. Students can solve NCERT Class 10 Social Science The Making of Global World Multiple Choice Questions with Answers to know their preparation level. The synchronous generator is found at power stations where it is synchronized with the turbine. 17. (e) decreases compressor power. 66. (c) at critica. B. anitnoise . (c) Zero The reason is the hot temperature is TAKEN OUT by low boiling temperature of the refrigerant. The draught produced by steel chimney as compared to that produced by brick chimney for the same height is (a) less (b) more (c) same (d) may be more or less. Ans: c (c) sublimation temperature (c) solid and dry ice (d) all of the above (b) vapour absorption (a) Increases (b) evaporator (e) unpredictable. (a) increases COP (b) work done by compressor (a) actual COP/fheoretical COP (Ans:b), In Cascade refrigeration, COP is For proper parallel operation, 3-phase alternators must have the same (a) speed. (e) throttling device. b) toxin . Magnetic effect of current was discovered by (a) Oersted (b) Faraday (c) Bohr (d) Ampere (a) Oersted. Which of the following cycles uses air as the refrigerant (c) Sensible heat 78. Ans: a a. the initial state of the gas should lie in cooling region b. the initial state of the gas should lie in heating region c. the initial state of the gas should lie on inversion curve d. none of the above View Answer / Hide Answer (a) less than 2 kg 29. (b) safety relief valve Ans: a 525. (a) 1 : 1 (e) weak solution in liquid heat exchanger gives up heat to the strong solution. Save my name, email, and website in this browser for the next time I comment. ASWDC (App, Software & Website Development Center) Darshan (c) 5 Formation of frost on evaporator in refrigerator (b) sulphur sticks which on detection gives white smoke (a) more 38. (e) unpredictable. Ans: d Ans: c. ... the cooling effect produced by melting 1 ton of ice (c) the … Students and parents can download free a collection of all study material issued by various best schools in India. (Ans: b), With the increase of discharge pressure, the refrigerating effect 35. (d) 1 : 3 View EE,UNIT 2,MCQ.xlsx from MECHANICAL ENGR6911 at Sultan Qaboos University. (a) collect liquid refrigerant and prevent it from going to compressor (d) None Ans: a Ans: b (d) None During combustion in the engine, temperature in the cylinder raises up to. (a) suction of compressor C Viscosity . (b) increases (a) lithium bromide used in vapour absorption cycle is nonvolatile (c) enthalpy increase in compressor The regular electric power supply (hydel power or thermoelectric) uses high voltage and … (e) unperdictable. (c) 9 : 1 (d) low pressure side near receiver (c) optimum Internal Combustion Engines (I.C. (c) 5 (b) the cooling effect produced by melting 1 ton of ice If the distances of the standard source S and the test source T from the photometer head are L 1 and L 2, respectively, then, according to the inverse square law, if the illumination on both the sides of the screen are equal then the candlepower of the source is proportional to the square of the distance between the source and the photometer head.. (e) anywhere in the cycle. In Florey and Chain's experiment, eight mice were infected with lethal doses of Streptococcus bacteria. « Back CONTENTS Next » 1. (b) 1.2 Ans: d (c) 211 BTU/min (e) there is no such restriction. (d) the refrigeration effect to produce 1 ton of ice at NTP conditions (a) water at 0°C (b) it permits complete evaporation in the evaporator (c) strong solution to ammonia vapour (d) 2 to 5 h.p. Ans: b (b) smaller (d) None (Ans: c), The boiling point of a liquid increases with the (c) Vapor absorption cycle (a) near critical temperature of refrigerant Air refrigeration cycle is used in MCQ Questions for Class 11 Chemistry with Answers were prepared based on the latest exam pattern. Learn vocabulary, terms, and more with flashcards, games, and other study tools. If the distances of the standard source S and the test source T from the photometer head are L 1 and L 2, respectively, then, according to the inverse square law, if the illumination on both the sides of the screen are equal then the candlepower of the source is proportional to the square of the distance between the source and the photometer head. The factors on which one magnetic field strength produced by current carrying solenoids depends are (a) Magnitude of current (b) Number of turns (c) Nature of core … 62. 6. (d) 6 (c) absorber Ans: b (d) 840 kJ/min (d) Brine (a) lowers evaporation temperature (d) driers (a) condenser As is evident from the figure the effect of sub-cooling is to increase the refrigerating effect. Which noise is produced by lighting discharges in thunderstorms? Engines): MCQ question is the important chapter for a Mechanical Engineering and GATE students. To … One ton of the refrigeration is (A) The standard unit used in refrigeration problems (B) The cooling effect produced by melting 1 ton of ice (C) The refrigeration effect to freeze 1 ton of water at 0 C into ice at 0 C in 24 hours (D) The Ans: e (a) small (e) none of the above. per ton of refrigeration (b) manually operated valve (a) T1 + T2 Your name: ... More Mcq. Ans: c 73. (d) large latent heat (a) high sensible heat (c) equal to atmospheric pressure (Ans: b), As discharge pressure decreases in vapor compression refrigeration, the cooling effect 70. (e) condensing temperature of ice. (a) 1.25 Ans: d d) Due to high cooling effect the cutting edges of the tool break off . (d) None The cooling produced in the Joule–Thomson expansion makes it a valuable tool in refrigeration. CBSE Class 7 Science Electric current and its Effects MCQs.Revision worksheets, Sample papers, Question banks and easy to learn study notes for all classes and subjects based on CBSE and NCERT Electric current and its Effects guidelines. For better COP of refrigerator, the pressure range corresponding to temperature in evaporator and condenser must be (a) Vapor compression cycle Ans: e (b) <1 a) The saturation voltage V CF of silicon transistor is more than germanium transistor. Slideways of a machine are frequently lubricated by . (a) halide torch which on detection produces greenish flame lighting (d) 40 tons (c) high latent heat 92. 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