STUDY LESSON:-53 [CIVIL ENGINEERING]
For Competitive exams/Govt. jobs/Semester exam/Self Study Purpose
1. Cavitaion is caused by
a) High pressure b) Low pressure c) High velocity d) Low Temperature
2. A fluid can be defined as a substance one which ______________
3. Surface Tension occurs due to ________
a) Cohesion only b) Adhesion only c) Cohesion and Adhesion d) none of the above
4. Unit of dynamic viscosity is
a) N-sec/m b) m²/sec c)N-sec/m² d) none of the above
5. In a static fluid the pressure at a point is
a) Equal in all direction b) Equal to the wight of the fluid c) Equal in all direction, only if its viscosity is zero d) Always directed downwards
6. What will be the acceleration in a steady radial flow into an intake, the velocity is found to be 1/r², where r is the radial distance.
a) 1/r b) 1/r³ c) 1/r⁵ d) none of the above7. If a flow is said to satisfy the condition of laplace equation then the flow
a) is irrotional and satisfies continuity equation b) doesn't satisfies continuity equation c) is rotational d) is irrotaional but dosen't satisfies continuity equation
8. ______________ is used to measure the velocity of fluid.
9. Velocity of subject/ Velocity of sound is represented as
a) Reynold's no. b) Weber no. c) Mach no. d) none of above
10. Invertial Force/ Surface tension force is represented as
a) Reynold's no. b) Weber no. c) Mach no. d) none of above
Answers:-
1. b) Low pressure
2. can deform indefinitely under the action of the smallest shear force
3. a) Cohesion only
4. c)N-sec/m²
5. a) Equal in all direction
6.c) 1/r⁵
7. a) is irrotional and satisfies continuity equation
8. Pitot Tube
9. c) Mach no.
10. b) Weber no.
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