Home / Online Test / Power Systems Objective Questions & Answers – Set 19 Online Test Power Systems Objective Questions & Answers – Set 19 S Bharadwaj ReddyLeave a comment Power Systems Objective Questions & Answers 0% For variable heads of near about but less than 30 m, which type of turbines is used hydro power plant Francis Kaplan Pelton None of above. Correct! Wrong! - Continue >> Which turbine is ideally suited to pumped storage plants Pelton. Impeller Kaplan Francis Correct! Wrong! - Continue >> Deflectors are provided in Kaplan turbine. Francis turbine. Pelton wheel. propeller turbine. Correct! Wrong! - Continue >> Where is the draft tube of a hydroelectric plant that is an airtight pipe located At the beginning of the penstock. In between the runner exhaust and the tail race. Near the surge tank. In between the penstock and runner. Correct! Wrong! - Continue >> The specific speeds of Kaplan, Francis and Pelton turbines are in none of the above. neither increasing nor decreasing order. the decreasing order. the increasing order. Correct! Wrong! - Continue >> An impulse turbine always operates submerged. operates by initial complete conversion to kinetic energy. is most suited for low head and high discharge power plants. makes use of a draft tube. Correct! Wrong! - Continue >> One atomic mass unit is equivalent to 180.5 MeV. 120.4 MeV. 251.2 MeV. 931.4 MeV. Correct! Wrong! - Continue >> Nuclear reactors usually employ fusion fission both of fusion and fission. none of above. Correct! Wrong! - Continue >> The function of moderator in a nuclear reactor is to absorb the excess. to increase the energy of the neutrons. to slow down the neutrons. all of the above. Correct! Wrong! - Continue >> Which of the following are the fissile materials U238 and Th232. U235, U233 and Pu239. None of these. U235 and Th239. Correct! Wrong! - Continue >> The specific speed of water turbine is the speed at which the turbine develops unit horse power at unit head. a minimum horse power. maximum horse power. unit horse power at all heads. Correct! Wrong! - Continue >> The area under a flow duration curve represents total power available. total of units of energy available. maximum rate of run-off during the period. total quantity of run-off during that period. Correct! Wrong! - Continue >> In Francis turbine runner, the number blades is usually of the order of 16 - 24. 6 - 8. 12 - 14. 3 - 6. Correct! Wrong! - Continue >> A moderator material should have may be any of the above. none of the above. small atomic mass. large atomic mass. Correct! Wrong! - Continue >> The specific speed ( NS ) of turbine is given by N√( P ) / H2/3. N√( P ) / H1.25. P√( N ) / H3/2. none of these. Correct! Wrong! - Continue >> When a nuclear reaction is operating at constant power the multiplication factor is may be any of the above. less than 1. greater than 1. 1 Correct! Wrong! - Continue >> Which one of following fuels is used by slow thermal nuclear reaction for power generation Th232. U238. U235. Pu239. Correct! Wrong! - Continue >> For head and low discharge the water turbine used Pelton wheel. Kaplan wheel. Francis turbine. propeller turbine. Correct! Wrong! - Continue >> Which one of following is employed as a moderator by CANDU type of slow thermal nuclear reactors Graphite Heavy water. Water Beryllium Correct! Wrong! - Continue >> The function of draft tube is reaction turbine is to reduce water hammer. all of above. convert kinetic energy of water. increase flow rate of water. Correct! Wrong! - Continue >> Reflector nuclear reactor are made of steel boron beryllium cast iron. Correct! Wrong! - Continue >> A CANDU reactor uses only fertile materials. natural uranium as fuel and heavy water as moderator and coolant. enriched uranium as fuel and ordinary water as moderator and cooler. highly enriched uranium as fuel and water as moderator and coolant. Correct! Wrong! - Continue >> The draft tube is provided to increase the acting head on the water wheel. raise the water surface of the stream to create an artificial head. none of the above. reduce the effect of water hammer. Correct! Wrong! - Continue >> The power level of nuclear reactor can be increase by ( K = multiplication factor ) lowering the value of K below 1 but later bringing it back to K = 1. lowering the value of K below and keeping at that lowered value. raising the value of K above 1 and keeping it at raised value. raising the value of K above 1, but later bringing it back to K = 1. Correct! Wrong! - Continue >> In kaplan runner, the number of blades is generally of the order of 1 - 2. 16 - 24. 12 - 16. 3 - 6. Correct! Wrong! - Continue >> On what factors does the selection of a water turbine depend Nature of load. Speed All of above. Working head. Correct! Wrong! - Continue >> Francis, Kaplan and propeller turbines fall under the category of Impulse turbine. Axial flow. Reaction turbine. Impulse-reaction combined. Correct! Wrong! - Continue >> For harnessing low variable water heads, the suitable hydraulic turbine with reaction and adjustable vanes is Francis Kaplan Pelton Impeller Correct! Wrong! - Continue >> Which of following are the fertile materials U233 and Pu239. U238 and Th239. U238 and Pu239. U238 and Th232 Correct! Wrong! - Continue >> Location of a surge tank, in a hydroelectric power station, is near tail race. dam reservoir turbine Correct! Wrong! - Continue >> Share the quiz to show your results ! 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