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This set of Fluid Mechanics and Machinery Multiple Choice Questions & Answers (MCQs) focuses on Fluid Mechanics And Machinery Set 14
Q1 | Discharge capacity of the reciprocating pump is that of the centrifugal pump.
- higher than
- lower than
- same as
- unpredictable
Q2 | Which pump is more suitable for an application where very high pressure is required to be developed at moderate discharge?
- reciprocating pump
- centrifugal pump
- turbine
- none of the mentioned
Q3 | The process of filling the liquid into the suction pipe and pump casing up to the level of delivery valve is called as
- filling
- pumping
- priming
- leveling
Q4 | Most widely used sanitary pumps in the dairy industry are?
- centrifugal pump
- liquid ring pump
- positive displacement pump
- suction pump
Q5 | Main application of centrifugal pump is in which of the following?
- low viscosity products
- heavily aerated liquids
- gentle treatment with high viscosity
- water treatment
Q6 | Main application of liquid ring pump is in which of the following?
- low viscosity products
- heavily aerated liquids
- gentle treatment with high viscosity
- water treatment
Q7 | Main application of positive displacement pump is in which of the following?
- low viscosity products
- heavily aerated liquids
- gentle treatment with high viscosity
- water treatment
Q8 | Which of the following pump suitable for handling AMF in the dairy industry?
- centrifugal pump
- liquid ring pump
- diaphragm pump
- peristaltic pumps
Q9 | What is the water flow direction in the runner in a Francis turbine?
- axial and then tangential
- tangential and then axial
- radial and then axial
- axial and then radial
Q10 | Which of the following is true in case of flow of water before it enters the runner of a Francis Turbine?
- available head is entirely converted to velocity head
- available head is entire converted to pressure head
- available head is neither converted to pressure head nor velocity head
- available head is partly converted to pressure head and partly to velocity head
Q11 | Which of the following profiles are used for guide vanes to ensure smooth flow without separation?
- rectangular
- bent rectangular
- elliptical
- aerofoil
Q12 | In which of the following type of runners the velocity of whirl at inlet is greater than the blade velocity?
- such a case is practically impossible
- slow runner
- medium runner
- fast runner
Q13 | Which of the following runner types will have the highest vane angle at inlet (β1 value)?
- slow runner
- medium runner
- fast runner
- vane angle is defined only for kaplan turbines and not francis turbines
Q14 | In case of a Medium runner, tan (α1) CANNOT be given by (α1 = Guide vane angle at inlet)?
- vf1 / vw1
- vr1 / vw1
- vr1 / u1
- vw1 / u1
Q15 | In the velocity diagrams for Francis turbine, which of the following velocity directions is along the blade curvature?
- vr1
- vw1
- v1
- u1
Q16 | 2 AXIAL, RADIAL AND MIXED FLOW TURBINES.
- guide vane angle at inlet
- blade angle at inlet
- vane angle at inlet
- blade angle at outlet
Q17 | In the figure shown below, which of the following type of runners has the blade curvature as shown in the above figure (The arrow denotes direction of blade motion)?
- information insufficient to determine
- slow runner
- medium runner
- fast runner
Q18 | A hydraulic coupling belongs to the category of
- energy absorbing machines
- energy generating machines
- power absorbing machines
- energy transfer machines
Q19 | The electric power which is obtained from hydraulic energy
- thermal power
- mechanical power
- solar power
- hydroelectric power
Q20 | At present which is cheapest means of generating power
- thermal power
- nuclear power
- hydroelectric power
- electric power
Q21 | Pen stocks are made up of
- steel
- cast iron
- mild steel
- wrought iron
Q22 | is an inward radial flow reaction turbine?
- pelton turbine
- kaplan turbine
- francis turbine
- propeller turbine
Q23 | is a axial flow reaction turbines, if vanes are fixed to hub of turbine
- propeller turbine
- francis turbine
- kaplan turbine
- pelton turbine
Q24 | Francis and Kaplan turbines are known as
- impulse turbine
- reaction turbine
- axial flow turbine
- mixed flow turbine
Q25 | Specific speed of reaction turbine is between?
- 5 and 50
- 10 and 100 c) 100 and 150 d) 150 and 300