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Showing posts with the label UOPPI

Fuels and Combustion multiple choice questions

  Fuels and Combustion 1. The following is (are) used as additives for Compressed Ignition engine fuels. a) Amyl Nitrate b) Ethyl Thionitite c) Amyl Nitrite d) All of the above Answer: All of the above 2. In order to have good engine performance a) The fuel should have low boiling temperature for lower warm up period b) The percentage of volume evaporated at low temperatures should be small c) A rich mixture of air-fuel ratio of 12 to 13:1 is considered to be suitable for easy starting of the engine d) All of the above Answer: All of the above 3. The solid fuels can be used in Internal combustion engine only after their a) Solidification b) Liquefaction c) Gasification d) All of the above Answer: Gasification 4. Decomposition of higher hydrocarbon molecules into lower hydrocarbons having lower boiling temperatures is known as a) Polymerization b) Hydrogeneration c) Isomerization d) Cracking Answer: Cracking 5. The following is the desirable property (ies) of good Internal Combustion en

Heads in a Turbine multiple choice questions

  Heads in a Turbine 1. Under what head is Pelton turbine operated? a) 20-50 meters b) 15-2000 meters c) 60-200 meters d) 50-500 meters Answer: 15-2000 meters 2. Head under which Kaplan turbine is operated______ a) 10-70 meters b) 70 -100 meters c) 100-200 meters d) Above 200 meters Answer: 10-70 meters 3. Total head of turbines is_______ a) Pressure head + Static head b) Kinetic head + Static head c) Static head + Pressure head d) Pressure head + Kinetic head + Static head Answer: Pressure head + Kinetic head + Static head 4. The turbine is preferred for 0 to 25 m head of water? a) Pelton wheel b) Kaplan turbine c) Tube turbine d) Francis turbine Answer: Kaplan turbine 5. The difference between gross head and friction losses is ____________ a) Net head b) Gross head c) Manometric head d) Net positive suction head Answer: Net head 6. Among the following which turbine requires more head? a) Pelton Turbine b) Kaplan Turbine c) Francis turbine d) Tube Turbine

Turbines multiple choice questions

  Turbines 1. Which principle is used in Hydraulic Turbines? a) Faraday law b) Newton’s second law c) Charles law d) Braggs law Answer: Newton’s second law 2. In hydraulic turbines, inlet energy is greater than the outlet energy. a) True b) False Answer: True 3. Hydraulic energy is converted into another form of energy by hydraulic machines. What form of energy is that? a) Mechanical Energy b) Electrical Energy c) Nuclear Energy d) Elastic Energy Answer: Mechanical Energy 4. Buckets and blades used in a turbine are used to: a) Alter the direction of water b) Switch off the turbine c) To regulate the wind speed d) To regenerate the power Answer: Alter the direction of water 5. _______________is the electric power obtained from the energy of the water. a) Roto dynamic power b) Thermal power c) Nuclear power d) Hydroelectric power Answer: Hydroelectric power 6. Which energy generated in a turbine is used to run electric power generator linked to the turbine shaft? a) Mechanical Energy b)

Top 60 Unit Operations & Power Plant Instrumentation Objective Questions and Answers

  Top 60 Unit Operations & Power Plant Instrumentation Objective Questions and Answers 1. What is the removal of fine particle sand from dissolved solids called? a) Filteration b) sedimentation c) disinfection d) deoxidation Answer: Filteration 2. In distillation, overhead product contains  a) Only one component b) two components c) any number of component d) saturated liquid Answer: any number of component 3. Separation of two or more components of a liquid solution can not be achieved by a) Fractional Crystallisation b) Liquid Extraction c) Absorption d) Evaporation Answer: Absorption 4. Mass transfer rate between two fluid phases does not necessarily depend on the __________ of the two phases. a) Chemical properties b) Physical properties c) Degree of turbulence d) Interfacial area Answer: Chemical properties 5. The main function of centrifugal pumps are to ________  a) Transfer speed b) Transfer pressure c) Transfer temperature d) Transfer energy Answer: Transfer energy 6. Dryi

Fluid Power Actuators multiple choice questions

  Fluid Power Actuators 1. What is the advantage of using a single acting cylinder? a) high cost and reliable b) honing inside the inner surface of pump is not required c) piston seals are not required d) all the above Answer: piston seals are not required 2. What is the function of electric actuator? a) converts electrical energy into mechanical torque b) converts mechanical torque into electrical energy c) converts mechanical energy into mechanical torque d) none of the above Answer: converts electrical energy into mechanical torque 3. Match the following group 1 items with group 2 items and select the correct option. 1. Radial motor _____________ A. Swash plate 2. Axial motor ______________ B. Crank shaft motor 3. Orbit ____________________ C. Vane motor 4. Low torque motor ________ D. Geroller motor a) 1-B, 2-A, 3-D, 4-C b)  1-A, 2-C, 3-B, 4-D c)  1-C, 2- A, 3-B, 4-D d) 1-B, 2-D, 3-A, 4-C Answer: 1-B, 2-A, 3-D, 4-C 4. Which of the following is a hydraulic cylinder based on construc

Thermodynamic processes multiple choice questions

  Thermodynamic processes 1. Calculate the work done by the gas in an isothermal process from A to B. P A  = 1Pa, V A  = 3m 3 , P B  = 3Pa. a) 3.3J b) 3J c) -3.3J d) -4.58J Answer: -3.3J 2. Isothermal process can be represented by which law? a) Charle’s law b) Boyle’s law c) Gay-Lussac’s law d) 2nd law of thermodynamics Answer: Boyle’s law 3. In an isothermal process for an ideal gas, change in internal energy is zero. True or False? a) True b) False Answer: True 4. In which of the following processes is heat transfer equal to zero? a) Isentropic b) Isochoric c) Isothermal d) Diathermic Answer: Isentropic 5. Which of the following variables is zero for a cyclic process? a) Work done b) Heat supplied c) Total heat + Total work d) Total heat – Total work Answer: Total heat – Total work 6. The latent heat of steam at atmospheric pressure is. a) 1535 kJ/kg b) 1875 kJ/kg c) 2257 kJ/kg d) 2685 kJ/kg Answer: 2257 kJ/kg 7. Gas laws are applicable to a) Gases as we