Top 50+ Solved Dimensional Analysis MCQ Questions Answer
Q. When the Mach number is less than unity, the flow is called
a. Sub-sonic flow
b. Sonic flow
c. Super-sonic flow
d. Hyper-sonic flow
Q. The product of mass and acceleration of flowing liquid is called
a. Inertia force
b. Viscous force
c. Gravity force
d. Pressure force
Q. Ratio of inertia force to elastic force is known as
a. Mach number
b. Froude number
c. Reynolds number
d. Weber's number
Q. Euler's number is the ratio of __________ force to pressure force.
a. Inertia
b. Gravity
c. Viscous
d. None of these
Q. Ratio of inertia force to surface tension is known as
a. Mach number
b. Froude number
c. Reynolds’s number
d. Weber's number
Q. The force present in a moving liquid is
a. Inertia force
b. Viscous force
c. Gravity force
d. All of these
Q. A ship whose hull length is 100 m is to travel at 10 m/sec. For dynamic similarity, at what velocity should a 1:25 model be towed through water?
a. 10 m/sec
b. 25 m/sec
c. 2 m/sec
d. 50 m/sec
Q. When the Mach number is more than 6, the flow is called
a. Sub-sonic flow
b. Sonic flow
c. Super-sonic flow
d. Hyper-sonic flow
Q. The ratio of the inertia force to the viscous force is called
a. Reynold's number
b. Froude's number
c. Weber's number
d. Euler's number
Q. Reynold's number is the ratio of the inertia force to the
a. Surface tension force
b. Viscous force
c. Gravity force
d. Elastic force
Q. Froude number is significant in
a. Supersonics, as with projectile and jet propulsion
b. Full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc.
c. Simultaneous motion through two fluids where there is a surface of discontinuity, gravity forces, and wave making effect, as with ship's hulls
d. All of the above
Q. Reynold's number is the ratio of inertia force to
a. Pressure force
b. Elastic force
c. Gravity force
d. Viscous force
Q. Principle of similitude forms the basis of
a. Comparing two identical equipments
b. Designing models so that the result can be converted to prototypes
c. Comparing similarity between design and actual equipment
d. Hydraulic designs
Q. Select the correct statement
a. Weber's number is the ratio of inertia force to elastic force
b. Weber's number is the ratio of gravity force to surface tension force
c. Weber's number is the ratio of viscous force to pressure force
d. Weber's number is the ratio of inertia force to surface tension force
Q. For similarity, in addition to models being geometrically similar to prototype, the following in both cases should also be equal
a. Ratio of inertial force to force due to viscosity
b. Ratio of inertial force to force due to gravitation
c. Ratio of inertial force to force due to surface tension
d. All the four ratios of inertial force to force due to viscosity, gravitation, surface tension, and elasticity