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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. |
Q41 ⇒ Water is __________ liquid. an incompressible [other wrong options] [Discuss in forum] a compressible Both (a) and (b) None of these |
Q42 ⇒ A weir is said to be broad crested weir, if the width of the crest of the weir is __________ half the height of water above the weir crest. more than [other wrong options] [Discuss in forum] equal to less than none of these |
Q43 ⇒ When the venturimeter is inclined, then for a given flow it will show __________ reading. same [other wrong options] [Discuss in forum] more less none of these |
Q44 ⇒ Select the correct statement. Weber's number is the ratio of inertia force to surface tension force. [other wrong options] [Discuss in forum] Weber's number is the ratio of inertia force to elastic force. Weber's number is the ratio of gravity force to surface tension force. Weber's number is the ratio of viscous force to pressure force. |
Q45 ⇒ The maximum discharge over a broad crested weir is. 1.71 Cd x L x H3/2 [other wrong options] [Discuss in forum] 0.384 Cd x L x H1/2 0.384 Cd x L x H3/2 1.71 Cd x L x H1/2 |
Q46 ⇒ In a sharp-crested weir, the thickness of the weir is kept less than half of the height of water above the crest of the weir. True [other wrong options] [Discuss in forum] False Both (a) and (b) None of these |
Q47 ⇒ A flow is called sub-sonic, if the Mach number is. less than unity [other wrong options] [Discuss in forum] unity between 1 and 6 more than 6 |
Q48 ⇒ A manometer is used to measure. high pressure [other wrong options] [Discuss in forum] low pressure moderate pressure atomospheric pressure |
Q49 ⇒ The pressure of liquid at throat in a venturimeter is __________ than that at inlet. lower [other wrong options] [Discuss in forum] higher both (a) and (b) none of these. |
Q50 ⇒ The flow in a pipe is turbulent when Reynold number is. more than 2800 [other wrong options] [Discuss in forum] less than 2000 between 2000 and 2800 none of these |
Q51 ⇒ In an external mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to 0.89 times the height of the liquid, above the vena contracta. less than [other wrong options] [Discuss in forum] more than Both (a) and (b) none of these. |
Q52 ⇒ The pressure at a stagnation point is always low. Disagree [other wrong options] [Discuss in forum] Agree Both (a) and (b) None of these |
Q53 ⇒ Stoke is the unit of. kinematic viscosity in C. G. S. units [other wrong options] [Discuss in forum] kinematic viscosity in M. K. S. units dynamic viscosity in M. K. S. units dynamic viscosity in S. I. units |
Q54 ⇒ The specific gravity has no units. Disagree [other wrong options] [Discuss in forum] Agree Both (a) and (b) None of these |
Q55 ⇒ In an internal mouthpiece, if the jet after contraction expands and fills up the whole mouthpiece, then the mouthpiece is said to be running free. False [other wrong options] [Discuss in forum] True Both (a) and (b) None of these |
Q56 ⇒ The intensity of pressure at any point, in a liquid, is. directly proportional to the depth of liquid from the surface [other wrong options] [Discuss in forum] directly proportional to the area of the vessel containing liquid directly proportional to the length of the vessel containing liquid inversely proportional to the depth of liquid from the surface |
Q57 ⇒ The loss of pressure head in case of laminar flow is proportional to. velocity [other wrong options] [Discuss in forum] (velocity)2 (velocity)3 (velocity)4 |
Q58 ⇒ Bulk modulus of a fluid is the ratio of. increase in pressure to the volumetric strain [other wrong options] [Discuss in forum] shear stress to shear strain increase in volume to the viscosity of fluid critical velocity to the viscosity of fluid |
Q59 ⇒ The flow in a pipe or channel is said to be non-uniform when. the liquid particles at different sections have different velocities [other wrong options] [Discuss in forum] the liquid particles at all sections have the same velocities the quantity of liquid flowing per second is constant each liquid particle has a definite path |
Q60 ⇒ The Newton's law of resistance is based on the assumption that the. all of the above [other wrong options] [Discuss in forum] planes of the body are completely smooth space around the body is completely filled with the fluid fluid particles do not exert any influence on one another |
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