For the close coil helical spring of the maximum deflection is__________________?
(A) WD3n/d4N
(B) 2WD3n/d4N
(C) 4W²D3n/d4N
(D) 8WD3n/d4N
inertia of a rectangular section of width and depth about an axis passing The moment of through C.G. and parallel to its width is_______________?
(A) BD²/6
(B) BD3/6
(C) BD3/12
(D) B²D/6
Pick up the incorrect statement from the following: The torsional resistance of a shaft is directly proportional to___________________?
(A) Modulus of rigidity
(B) Angle of twist
(C) Reciprocal of the length of the shaft
(D) Moment of inertia of the shaft section
Stream lines and path lines always coincide in case of__________________?
(A) steady flow
(B) laminar flow
(C) uniform flow
(D) turbulent flow
The motion of air mass in a tornado is a________________?
(A) free vortex motion
(B) forced vortex motion
(C) free vortex at center and forced vortex outside
(D) forced vortex at center and free vortex outside
The continuity equation pi V,A,= p2V2A2 is based on the following assumption regarding flow of fluid______________?
(A) steady flow
(B) uniform flow
(C) incompressible flow
(D) frictionless flow
If the velocity is zero over half of the cross-sectional area and is uniform over the remaining half, then the momentum correction factor is_______________?
(A) 1
(B) 4/3
(C) 2
(D) 4
In a two dimensional incompressible steady flow around an airfoil, the stream lines are 2 cm apart at a great distance from the airfoil, where the velocity is 30 m/sec. The velocity near the airfoil, where the stream lines are 1.5 cm apart, is_________________?
(A) 22.5 m/sec
(B) 33 m/sec
(C) 40 m/sec
(D) 90 m/sec
The eddy viscosity for turbulent flow is______________?
(A) a function of temperature only
(B) a physical property of the fluid.
(C) dependent on the flow
(D) independent of the flow
The horizontal component of force on a curved surface is equal to the_______________?
(A) product of pressure intensity at its centroid and area
(B) force on a vertical projection of the curved surface
(C) weight of liquid vertically above the curved surface
(D) force on the horizontal projection of the curved surface