Heat Transfer 1. Units for thermal conductivity a) J/kg.K b) J/mol.K c) J.ohm/sec.K2 d) W/m.K Answer: W/m.K 2. The ratio of energy transferred by convection to that by conduction is called a) Stanton number b) Nusselt number c) Biot number d) Preclet number Answer: Biot number 3. Air at 20° C blows over a plate of 50 cm x 75 cm maintained at 250° C. If the convection heat transfer coefficient is 25 W/m2 °C, the heat transfer rate is a) 215.6 kW b) 2156 kW c) 2.156 kW d) 21.56 Kw Answer: 2.156 kW 4. If the body is at thermal equilibrium, then the a) Emissivity = absorptivity b) Emissivity > absorptivity c) Emissivity < absorptivity d) None of the above Answer: Emissivity = absorptivity 5. The body which absorbs all radiations incident upon it, is called as a) Black body b) White body c) Opaque body d) Transparent body Answer: Black body 6. In radiative heat transfer, a gray surface is one a) which appears gray to the eye b) whose emissivity is independent of wavelength c) which

  Distillation-Differential Distillation (Rayleigh Equation) 1. For a ternary mixture, the number of cuts required is_________ a) 1 b) 2 c) 3 d) 4 Answer: 2 2. Estimate the feed rate, if the composition of the more volatile component in the feed is 50% and the residue is 10% and the equilibrium relation is given by y*= 1.975x. Also, the rate of residue is 60 mol/hr. a) 213 mol/hr b) 313 mol/hr c) 413 mol/hr d) 513 mol/hr Answer: 313 mol/hr 3. The initial portion of the distillate will be a low volatile component. a) True b) False Answer: False 4. Find the rate of distillate, if the composition of the more volatile component in the feed is 50% and the residue is 10% and the equilibrium relation is given by y*= 1.975x. Also the rate of residue is 60 mol/hr. a) 153 mol/hr b) 253 mol/hr c) 353 mol/hr d) 453 mol/hr Answer: 253 mol/hr 5. After the separation by differential distillation, the high volatile and low volatile components are stored in _____________ a) Batch b) Cuts c) Distill d)

  Wind Energy 1. _____ force is responsible for forcing the global winds towards westernly direction. a) Coriolis b) Gravitational c) Centripetal d) Centrifugal Answer: Coriolis 2. Uneven heating occurs on land surface and water bodies are due to _____ a) Air Currents b) Solar radiation c) Lunar eclipse d) None of the above Answer: Solar radiation  3. The wind intensity can be described by a)  Reynolds number b) Mach number c) Beaufort number d) Froude number Answer: Beaufort number 4. Winds having following speed are suitable to operate wind turbines. a) 5 – 25m/s b) 10 – 35m/s c) 20 – 45m/s d) 30 – 55m/s Answer: 5 – 25m/s 5. The following is (are) the classification of winds a) Global wind b) Local wind c) both (a) and (b) d) None of the above Answer: both (a) and (b) 6. The amount of energy available in the wind at any instant is proportional to ___ of the wind speed. a) Square root power of two b) Square root power of three c) Square power d) Cube power Answer: Cube power  6. Globa

  Centrifugal Pumps  1. The rotational kinetic energy comes from ______ a) Engine motor b) Pump c) Tank d) Draft tube Answer: Engine motor 2. The inlet passage of water entry is controlled by ________ a) Head race b) Gate c) Tail race d) Pump Answer: Gate 3. The main function of centrifugal pumps are to ________ a) Transfer speed b) Transfer pressure c) Transfer temperature d) Transfer energy Answer: Transfer energy 4. The main function of nozzle is to __________ a) Varying temperatures b) Pressure variations c) Load variations d) Heat variations Answer: Pressure variations 5. Centrifugal pumps transfer energy from _______ a) Rotor to fluid b) Fluid to rotor c) Draft to rotor d) Rotor to draft Answer: Rotor to fluid 6. The fluid coming into the centrifugal pump is accelerated by ________ a) Throttle b) Impeller c) Nozzle d) Governor Answer: Impeller 7. Turbines and compressors work with the gas, while centrifugal pump transfers energy. a) True b) False Answer: True 8. Turbomachines wor

  Renewable Resources and Non Renewable Resources Renewable Resources 1. The main composition of biogas is _______________ a) Methane b) Carbon dioxide c) Nitrogen d) Hydrogen Answer: Methane 2. In hydroelectric power, what is necessary for the production of power throughout the year? a) Dams filled with water b) High amount of air c) High intense sunlight d) Nuclear power Answer: Dams filled with water 3. Wood is a renewable resource. a) True b) False Answer: True 4. Nuclear Energy is a Renewable Energy. a) True b) False Answer: False 5. Which Indian enterprise has the Motto “ENERGY FOREVER”? a) Indian Renewable Energy Development Agency b) Indian Non-Renewable Energy Development c) Indian Agricultural Development d) Indian Biotechnology Development Answer: Indian Renewable Energy Development Agency 6. Which among the following have a large amount of installed grid interactive renewable power capacity in India? a) Wind power b) Solar power c) Biomass power d) Small Hydro power Answer:

  Unit Operations 1. What is the removal of fine particle sand dissolved solids called? a) Filtration b) Sedimentation c) Deoxidation d) Disinfection Answer: Filtration 2. Solids concentration will be ________ in water than wastewater. a) More b) Less c) Equal to d) Similar Answer: Less 3. _________ is simply detaining water for a sufficient time. a) Coagulation b) Flocculation c) Sedimentation d) Filtration Answer: Sedimentation 4. Unit operations are the ______ operations to remove the impurities. a) Physical b) Chemical c) Biological d) Biochemical Answer: Physical 5 . Refrigeration is a mass transfer process. a) True b) False Answer: False 6. What did the structures use to prevent floating matter that enters into pumps and pumping systems? a) Aeration units b) Screens c) Grit chamber d) Bioreactor Answer: Screens 7. Separation is a unit operation. a) True b) False Answer: True 8. How are colour and odour removed? a) Adsorption b) Sedimentation c) Filtration d) Coagulation Answer: A

  Thermal Power Plant 1. In reaction turbine,function of the draft tube is a) To increase the flow rate b) To reduce water hammer effect c) To convert kinetic energy of water to potential energyby a gradual expansion in divergen part d) None of the above Answer: To reduce water hammer effect 2. A steam power station requires space a) Equal to diesel power station b) More than diesel power station c) More than diesel power station d) None of the above Answer: More than diesel power station 3. ____________ requires more space a) Nuclear power plant b) Hydro-electric power plant c) Tharmal power plant d) Diesel power plant Answer: Tharmal power plant 4. The major heat loss in a steam power station occurs in a) Economiser b) Spillways c) Condenser d) None of the above Answer: Condenser 5. The height of chimney in a staem power plant is governed by a) Flue gases quantity b) The draught to be produced c) Control of pollution d) Corner of power plant Answer: The draught to be produced 6. The

  Steam Condensers Cooling Towers 1. Based on the material, with which the towers are made, cooling towers are classified into _____ a) Timber towers, Concrete towers and Alloy duct type b) Induced and forced draught type c) Induced and natural draught type d) Timber towers, Concrete towers and Steel duct type Answer: Timber towers, Concrete towers and Steel duct type 2. Humidity of air affects the cooling of water in a cooling tower. a) True b) False Answer: True 3. Which of the following phenomenon is used to cool water in a cooling tower? a) Evaporation b) Radiation c) Condensation d) Conduction Answer: Evaporation 4. The cooling of water is affected by degree of uniformity in descending water. a) True b) False Answer: True 5. What is the function of a cooling tower in a power plant? a) It cools the hot water coming back from the condenser b) It cools the hot water being supplied to the condenser c) It heats the cold water coming back from the condenser d) It heats the cold water be

  Nuclear Power Plant 1. Cost of nuclear fuel in nuclear power plant economics is considered as __________ a) running cost b) maintenance cost c) capital cost d) development cost Answer: capital cost 2. What is the overall efficiency of nuclear power plant? a) 20 to 25% b) 25 to 30% c) 30 to 40 % d) 50 to 70 % Answer: 30 to 40 % 3. With respect to the load centre which location is suitable for stablishment of nuclear power plant? a) Load centre b) Near load centre but at reasonable distance c) Far away from load centre d) Near chemical industries Answer: Near load centre but at reasonable distance 4. Nuclear fuel in reactor lasts for __________ a) more than 5 months b) few weeks c) few days d) more than 5 years Answer: more than 5 years 5. How much coal is required to generate energy equivalent to the energy generated by 1 kg of uranium? a) 30000 tonnes of high grade coal b) 300 tonnes of high grade coal c) 10000 tonnes of high grade coal d) 3000 tonnes of high grade coal Answer: 3000

  Hydroelectric Power Plant 1. Hydroelectric power plant is __________ a) Non-renewable source of energy b) Conventional source of energy c) Non-conventional source of energy d) Continuous source of energy Answer: Conventional source of energy 2. The amount of electrical energy that can be generated by a hydroelectric power plant depends upon ___________ a) Head of water b) Quantity of water c) Specific weight of water d) Efficiency of Alternator Answer: Quantity of water 3. Which of the following is not a requirement for site selection of hydroelectric power plant? a) Availability of water b) Large catchment area c) Rocky land d) Sedimentation Answer: Sedimentation 4. Which of the following statement is true about hydroelectric power plant? a) Hydroelectric power plants are multipurpose. b) Due to non-uniform flow of water frequency control in such plants is very difficult. c) Hydroelectric power plant has high running cost d) Water is used as fuel in hydroelectric power plant Answer:

  Power Plant 1. 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 Answer: more   2. The commercial sources of energy are a) solar, wind and biomass b) fossil fuels, hydropower and nuclear energy c) wood, animal wastes and agriculture wastes d) none of the above Answer: fossil fuels, hydropower and nuclear energy 3. The proper indication of incomplete combustion is a) high CO content in flue gases at exit b) high CO2 content in flue gases at exit c) high temperature of flue gases d) the smoking exhaust from chimney Answer: high CO content in flue gases at exit 4. Compounding of steam turbine is done for a) reducing the work done b) increasing the rotor speed c) reducing the rotor speed d) balancing the turbine Answer: reducing the rotor speed 5. The energy radiated by sun on a bright sunny day is approximately a) 700 W/m2 b) 800 W/m2 c) 1 kW/m2 d) 2 kW/m2 Answer: 1 kW/m2 6. The perce