These are sample MCQs to indicate pattern, may or may not appear in examination G.M. VEDAK INSTITUTE OF TECHNOLOGY Program: Mechanical Engineering Curriculum Scheme: Revised 2016 Examination: Final Year Semester VIII Course Code:MEDLO8041 and Course Name: PPE Time: 1 hour Max. Marks: 50 Q Demand factor is defined as A Object oriented design always dominates the structural design A Maximum demand X Connected load A Maximum demand/ Connected laod A Connected laod/Maximum demand Q Load factor is defined as A Average load/Maximum demand A Average load X Maximum demand A Maximum demand/Average laod A Maximum demand X Connected load Q Diversity factor is always A Equal to unity A More than unity A More than than twenty A Less than unity Q Load factor for heavy industries may be taken as A 10 to 15% A 15 to 40% A 50 to 70% A 70 to 80% Q Which of the following is not suitable to use as peak plant? A Hydroelectric power plant A Gas power plant A Diesel elected plant A Nuclear power plant Q Which of the following power plant cannot be used as base load plant? A Diesel power plant A Hydroelectric power plant A Nuclear power plant A Thermal power plant The system supplying base and peak loads will be more economical if power is supplied by _________ Q A Only gas turbine power plant A Only thermal power plant A Only Diesel power plant A Combined operation of various power plants Q Load factor of power station is generally A Less then unity A Equal to unity A More than unity A More than Ten Q Diversity factor is defined as A Sum of individual maximum demands/Maximum demand of entire group A Maximum demand of entire group/Sum of individual maximum demands A Maximum demand of entire group X Sum of individual maximum demands A Maximum demand of entire group + Sum of individual maximum demands Q In order to have lower cost of electrical energy generation A The load factor and diversity factor should be low. A The load factor should be low but diversity factor should be high A The load factor should be low but diversity factor low. A The load factor and diversity factors should be high. Q A load curve is a plot of A Load versus generation capacity A Load versus current A Load versus time A Load versus cost of power Q The area under the load curve represents ____________ A Maximum demand A The average load on power system A Number of units generated A Load factor Q Load duration curve indicates _______ A The variation of load during different hours of the day A Total number of units generated for the given demand A Total energy consumed by the load A The number of hours for which the particular load lasts during a day Q Which of the following is called as cold reserve? A Reserve capacity available but not ready for use A Reserve capacity available and ready for use A Generating capacity connected to bus and ready to take load A Capacity in service in excess of peak load Q Which of the following has highest diversity factor? A Commercial lightning A Domestic lightning A Industrial power A Domestic power Q In a power plant if the maximum demand on plant is equal to the plant capacity then A Diversity factor will be unity A Plant reserve capacity will be zero A Load factor will be unity A Load factor will be zero Q Which of the following have highest operating cost? A Solar electric power plant A Hydroelectric power plant A Thermal power plant A Nuclear power plant Q Which of the following least affect the cost of electricity produced in thermal power plant? A Cost of fuel A The load factor A Cost of transportation A Salaries of higher officials Q The control rods in the control system of nuclear reactors are used to A Absorb excess neutrons A Control fuel consumption A Control temperature A Control the pressure Which of the following type of pump is used in liquid metal cooled reactor for circulation of liquid Q metal A Centrifugal A Axial A Reciprocation A Electromagnetic Q Each fission of U₂₃₅ produces on the average _________ fast neutrons as a product of reaction A 2.46 A 24.6 A 246 A 2460 Q The coolant used in boiling water reactor is A CO2 A Pressurised water A Mixture of water and steam A Liquid metal Q Effective moderators are those materials which contain A Light weight atoms A Heavy weight atoms A Critical atoms A Zero weight atoms A nuclear fission is initiated when the critical energy as compared to neutron binding energy of the Q atoms is A Same A More A Less A There is no such criterion Q The commonly used material for shielding is A Lead or concrete A Lead and tin A Graphite or cadmium A Thick galvanized sheets Q Enriched uranium is one in which A Percentage of U₂₃₅ has been artificially increased A Percentage of U has been artificially increased A Percentage of U₂₃₄ has been artificially increased A Extra energy is pumped from outside Q Gas cooled reactor uses following materials as moderator, and coolant A Graphite, CO2 A Graphite, air A Heavy water, CO2 A Lead, H2 Q Pick up the wrong statement fast breeder reactors A Operate at extremely high power densities A Are liquid metal cooled A Produce more fuel than they consume A Use water as coolant Enriched uranium is required as a fuel in a nuclear reactor, when light water is used as moderator and Q coolant, because light water has A High neutron absorption cross-section A Low moderating efficiency A High neutron scatter cross-section A Low neutron absorption cross-section Q Electron volt is the unit of A Atomic power A Energy A Voltage A Radio activity Q A moderator, in nuclear power plants, is a medium introduced into the fuel mass in order to A Slow down the speed of fast moving neutrons A Give faster speed to fast moving neutrons A Reduce the temperature A Extracts heat from nuclear reaction Q One gram of uranium will produce energy equivalent to approximately A 1 tonne of high grade coal A 4.5 tonnes of high grade coal A 10 tonnes of high grade coal A 100 tonnes of high grade coal Where reactor operation is designed with fast neutrons such as in reactors using highly enriched fuel, Q the moderator used is A Heavy water A Graphite A Carbon dioxide A No moderator is needed Q The nuclear energy is measured as A MeV A Curie A Farads A MW Q Isotopes of same elements have A Same atomic number and different masses A Same chemical properties but different atomic numbers A Different masses and different atomic numbers A Different chemical properties and same atomic numbers Q A boiling water reactor uses following as fuel A Enriched uranium A Plutonium A Thorium A Uranium Q Maximum supplementary firing means _________ A Minimum fuel that can be fired A Maximum fuel that can fired with the oxygen available in turbine A Maximum fuel that can be fired in given time A Maximum fuel that can be fired at given pressure Q By using combined cycle steam and gas power plant _________ A Specific fuel consumption can be decreased A Efficiency increased A Specific fuel consumption can be decreased and efficiency increased A Specific fuel consumption can be decreased and efficiency decreased Gas and Steam turbine combined power plant produces more electricity than traditional power plants Q by how much percent? A 25 A 40 A 50 A The given statement is false Q Marine compound power plants are also the combined gas and steam power plants A Statement is true A Stetement is false A Statement is incomplete A Statement is inappropriate Q How many sections does waste heat recovery boiler have in steam generators? A 1 A 2 A 3 A 4 Q Turbines that are run by exhaust gases are called _______ A Power recovery turbines A Stepped turbines A Turbo compounded engine A Turbo stepped turbines Q What are turbo-compound engines? A Turbines run at exhausts of Otto and diesel cycles A Combination of turbofan and turbojet engines A Combination of turboprop and turbofan engines A Combination of turboprop and turbojet engines Q The installation time for a gas turbine power plant is ______________ A Comparatively less than thermal power plant A Comparatively more than thermal power plant A Equal to thermal power plant A Very much longer than thermal power plant Q Heating value of coal is approximately A 1000-2000 kcal / kg A 2000-4000 kcal / kg A 5000-6500 kcal / kg A 9000-10,500 kcal / kg Q What is the function of cyclon separator in pneumatich ash handling system A To separate the lighter dust particles A To force up the movement of ash in pipes and tubes A To draw out the dust from furnace A To separate minute coal particles Q Coal used in power plant is also known as A Steam coal A Charcoal A Coke A Soft coal Q Which of the following is considered as superior quality of coal ? A Bituminous coal A peat A lignite A coke Q In a power plant, coal is carried from storage place to boilers generally by means of A Bucket A V-belts A trolleys A Manually Q Live storage of coal in a power plant means A Coal ready for combustion A Preheated coal A Storage of coal sufficient to meet 24 hour demand of the plant A Coal in transit.