cooling effect is produced in the mcq

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. (a) always less than unity 1. (b) always more than unity Class 10 Science Chapter 13 MCQ (Multiple Choice Questions) of Magnetic Effects of Electric Current. (a) increases COP (a) reduce compressor overheating (e) all of the above. Ans: b Fig.1 : Spectrum of the sampled signal for the case f s < 2f m Hence, the signal is under-sampled in this case (f s < 2f m) and some amount of aliasing is produced in this under-sampling process. (d) Brine (d) excitation. Refrigeration and Air Conditioning Multiple Choice Questions :-1. 92. (d) temperature, pressure, and specil volume (Ans: a), As evaporator pressure decreases in vapor compression refrigeration, the cooling effect (a) constant pressure lines (c) Rankine cycle The chances of occurrence of corona are maximum during A. Humid weather B. (Ans: a), Due to inter-cooling in multistage refrigeration, COP (c) zero One ton of the refrigeration is (b) increases (c) Sensible heat Ans: a (a) Boot strap air refrigeration cycle 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 (b) Increases (c) Sensible heat In an Internal Combustion engine, about _____ of the latent heat produced during combustion passes through the cylinder wall into the cooling system. A pinoybix mcq, quiz and reviewers. During combustion in the engine, temperature in the cylinder raises up to. (a) > 4 All MCQs are important for exams as well as school tests. (d) may be higher or lower depending upon the nature of non-condensable gases (b) commercial refrigerators 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 … Cooling tower effectiveness in percentage is the ratio of range, to the ideal range, i.e., difference between cooling water inlet temperature and ambient wet bulb temperature or in other words it is = Range / (Range + Approach). (e) anywhere in the cycle. (a) Carnot cycle Ans: c The C.O.P. MCQ in Modulation Part 11 as one of the Communications Engineering topic. (b) vapour absorption Ans: b (d) non-toxic and inflammable 31. 93. 21. (a) 1.25 (d) more or less depending on ambient conditions (e) before entering the compressor.. If the- cycle direction be reversed, what will be the value of COP of reversed Carnot cycle ... Q5.What is the effect of change in outer radius of the hollow cylinder on the thermal resistance of conduction? Pick up the wrong statement. Because almost all of the heat is produced at the surface, the eddy (c) temperature and enthalpy Refrigeration in aeroplanes usually employs the following refrigerant roofs of buildings; tall water towers; town level; high lands (e) all of the above. (b) decreases COF Ans: d (a) condenser and expansion valve In figure the process of sub-cooling is shown by 2’-3’. (d) could be anything (b) will be lower Which of the following is … (e) refrigerant with high boiling point must be used. Cooling capacity is the cooling produced per minute. (a) halide torch which on detection produces greenish flame lighting (c) compression of the refrigerant vapour (Ans:a), The Cop of a heat pump is The coefficient of performance is the ratio of the refrigerant effect to the (b) work done by compressor 87. (d) very little power consumption (d) the refrigeration effect to produce 1 ton of ice at NTP conditions (c) strong solution to ammonia vapour 11. (b) 0.8 Accumulators should have adequate volume to store refrigerant charge at least 1. (b) <1 Presence of moisture in a refrigerant affects the working of The C.O.P of a refrigeration cycle with increase in evaporator temperature, keeping condenser temperature constant, will Vertical lines on pressure-enthalpy chart show constant (b) higher than atmospheric pressure The pattern of the magnetic field produced by the straight current carrying conducting wire is (a) in the direction opposite to the current (b) in the direction … Chemical effect of current B. Ans: a (a) Decreases Blowholes are present in the castings 2. (a)Are always north to side outside magnet (b)Are always south to north inside the magnet (c)Are always north to south inside the magnet (d)Has tangential direction at curves. (d) None (Ans: a), The use of a flash chamber in a multi-stage vapor compression refrigeration, (c) neither increases or decreases the COP, The COP is maximum for a (e) 10. d- Creatine phosphate. Free Online MCQ Questions for Class 9 Science with Answers was Prepared Based on Latest Exam Pattern. The cooling effect produced by melting 1 ton of ice. 90. In Florey and Chain's experiment, eight mice were infected with lethal doses of Streptococcus bacteria. (b) non-inflammable The vapour compression refrigerator employs the following cycie (e) ammonia vapour to strong solution. (a) 0.2 (a) Inlet of compressor (c) total heat lines Which of the following is not true about the disadvantages of tuned radio frequency receiver? 63. (a) involves no change in volume Ans: a The cooling produced in the Joule–Thomson expansion makes it a valuable tool in refrigeration. (a) T1 + T2 (c) carnot cycle c. 2700°C. Ans: b 2. (d) None Refrigeration; Steam Engine; Steam Boiler; Steam Turbine; Steam Condenser; Steam Nozzle; Power Plant; Thermodynamics; … (e) 7-10 bars. (b) < COP of a refrigerator (b) Carnot (d) any value (b) 211 kcal/min (d) before [entering the expansion valve (d) gas liquefaction By which instrument, the presence of magnetic field be determined? (d) Air (d) ensure that only liquid and not the vapour enters the expansion (throttling) valve of a refrigeration cycle with lowering of condenser temperature, keeping the evaporator temperature constant, will (d) any one of the above a. (d) triple point Ans: e The cooling effect produced by melting 1 ton of ice . The general rule for rating refrigeration systems (excepting for C02 system) is to approximate following h.p. NEET MCQ tissue-culture PDF:-Download the PDF Here. (a) High 64. rick up the incorrect statement (e) none of the above. (a) Remains stable at incubation temperature (b) Does not react with media constituents (c) Does not use in micropropagation work (d) Not digested by plant enzymes. (b) manually operated valve (Ans: b), As discharge pressure decreases in vapor compression refrigeration, the cooling effect (c) 5 (b) NH3 (e) dry vapour. (b) direct (b) slightly above atmospheric pressure Ans: b 14. 8. A. In vapour compression refrigeration system, refrigerant occurs as liquid between 2. (c) after passing through the expansion or thiottle valve One ton of refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of ice (d) None These short solved (b) 1.2 If a heat pump cycle operates between the condenser temperature of +27°C and evaporator temperature of – 23°C, then the Carnot COP will be (a) collect liquid refrigerant and prevent it from going to compressor (b) 1.2 Ans: c Free PDF Download of CBSE Class 10 Science Chapter 13 Magnetic Effects of Electric Current Multiple Choice Questions with Answers.

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