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Mechanical Engineering Mcqs

For hypersonic flow, the Mach number is___________________?

  • (A)  unity
  • (B)  greater than unity
  • (C)  greater than 2
  • (D)  greater than 4
  • (E)  greater than 10
Submitted By :Ali Uppal

Normal depth in open channel flow is the depth of flow corresponding to_______________?

  • (A)  steady flow
  • (B)  unsteady flow
  • (C)  laminar flow
  • (D)  uniform flow
  • (E)  critical flow
Submitted By :Ali Uppal

A model of a reservior is drained in 4 mts by opening the sluice gate. The model scale is 1: 225. How long should it take to empty the prototype ?

  • (A)  900 minutes
  • (B)  4 minutes
  • (C)  4 x (225)3/2 minutes
  • (D)  4 (225)1/3 minutes
  • (E)  4 x V225 minutes
Submitted By :Ali Uppal

Buoyant force is___________________?

  • (A)  resultant force acting on a floating body
  • (B)  equal to the volume of liquid displaced
  • (C)  force necessary to keep a body in equilibrium
  • (D)  the resultant force on a body due to the fluid surrounding it
  • (E)  none of the above
Submitted By :Ali Uppal

Metacentre is the point of intersection of _________________________?

  • (A)  vertical upward force through e.g. of body and center line of body
  • (B)  buoyant force and the center line of body
  • (C)  mid point between e.g. and center of buoyancy
  • (D)  all of the above
  • (E)  none of the above
Submitted By :Ali Uppal

Center of buoyancy is the___________________?

  • (A)  centroid of the displaced volume of fluid
  • (B)  center of pressure of displaced volume
  • (C)  e.g. of floating ‘body
  • (D)  does not exist
  • (E)  none of the above
Submitted By :Ali Uppal

Barometer is used to measure__________________?

  • (A)  pressure in pipes, channels etc.
  • (B)  atmospheric pressure
  • (C)  very low pressure
  • (D)  difference of pressure between two points
  • (E)  rain level
Submitted By :Ali Uppal

Poise is the unit of________________?

  • (A)  surface tension
  • (B)  capillarity
  • (C)  viscosity
  • (D)  shear stress in fluids
  • (E)  buoyancy
Submitted By :Ali Uppal

Property of a fluid by which molecules of different kinds of fluids are attracted to each other is called________________?

  • (A)  adhesion
  • (B)  cohesion
  • (C)  viscosity
  • (D)  compressibility
  • (E)  surface tension
Submitted By :Ali Uppal

Which of the following is the unit of kinematic viscosity _________________?

  • (A)  pascal
  • (B)  poise
  • (C)  stoke
  • (D)  faraday
  • (E)  none of the above
Submitted By :Ali Uppal

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