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Fluid mechanics
1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q21 ⇒ The value of bulk modulus of a fluid is required to determine. Mach number [other wrong options] [Discuss in forum] Reynold's number Froude's number Euler's number |
Q22 ⇒ One cubic metre of water weighs. 1000 litres [other wrong options] [Discuss in forum] 100 litres 250 litres 500 litres |
Q23 ⇒ The hydraulic gradient line lies over the centre line of the pipe by an amount equal to the. pressure head [other wrong options] [Discuss in forum] velocity head pressure head + velocity head pressure head - velocity head |
Q24 ⇒ The Reynold's number of a ship is __________ to its velocity and length. directly proportional [other wrong options] [Discuss in forum] inversely proportional Both (a) and (b) none of these. |
Q25 ⇒ In a footstep bearing, if the radius of the shaft is doubled, then the torque required to overcome the viscous resistance will be. sixteen times [other wrong options] [Discuss in forum] double four times eight times |
Q26 ⇒ A weir is said to be narrow-crested weir, if the width of the crest of the weir is __________ half the height of water above the weir crest. less than [other wrong options] [Discuss in forum] equal to more than None of these |
Q27 ⇒ The maximum efficiency of transmission through a pipe is. 66.67% [other wrong options] [Discuss in forum] 50% 56.7% 76.66% |
Q28 ⇒ A fluid whose viscosity does not change with the rate of deformation or shear strain is known as. newtonian fluid [other wrong options] [Discuss in forum] real fluid ideal fluid non-newtonian fluid |
Q29 ⇒ The body will sink down if the force of buoyancy is __________ the weight of the liquid displaced. less than [other wrong options] [Discuss in forum] equal to more than none of these |
Q30 ⇒ The vacuum pressure can be measured with the help of a piezometer tube. False [other wrong options] [Discuss in forum] True Both (a) and (b) None of these |
Q31 ⇒ The velocity corresponding to Reynold number of 2800, is called. higher critical velocity [other wrong options] [Discuss in forum] sub-sonic velocity super-sonic velocity lower critical velocity |
Q32 ⇒ If the coefficient of discharge is 0.6, then the discharge over a right angled notch is. 1.417 H5/2 [other wrong options] [Discuss in forum] 0.417 H5/2 4.171 H5/2 7.141 H5/2 |
Q33 ⇒ The unit of dynamic viscosity in S.I. units is. N-s/m2 [other wrong options] [Discuss in forum] N-m/s2 poise stoke |
Q34 ⇒ The power transmitted through the nozzle is maximum when the head lost due to friction in the pipe is __________ of the total supply head. one-third [other wrong options] [Discuss in forum] one-half two-third None of these |
Q35 ⇒ Laminar flow __________ place at very low velocities. takes [other wrong options] [Discuss in forum] does not take Both (a) and (b) none of these. |
Q36 ⇒ An error of 1% in measuring head over the crest of the notch (H) will produce an error of __________ in discharge over a triangular notch, 2.5% [other wrong options] [Discuss in forum] 1% 1.5% 2% |
Q37 ⇒ In a footstep bearing, if the speed of the shaft is doubled, then the torque required to overcome the viscous resistance will be. double [other wrong options] [Discuss in forum] four times eight times sixteen times |
Q38 ⇒ The force present in a moving liquid is. all of these [other wrong options] [Discuss in forum] inertia force viscous force gravity force |
Q39 ⇒ A flow in which the viscosity of fluid is dominating over the inertia force is called. laminar flow [other wrong options] [Discuss in forum] steady flow unsteady flow turbulent flow |
Q40 ⇒ The specific weight is also known as weight density. Correct [other wrong options] [Discuss in forum] Incorrect Both (a) and (b) None of these |
Or |