Civil Engineering Mcqs

The boundary layer thickness in turbulent flow varies as______________?

(A) x”7
(B) x,/2
(C) x4/5
(D) x3/5

Submitted By :Ali Uppal

The shear stress distribution for a fluid flowing in between the parallel plates, both at rest, is_______________?

(A) constant over the cross section
(B) parabolic distribution across the section
(C) zero at the mid plane and varies linearly with distance from mid plane
(D) zero at plates and increases linearly to midpoint

Submitted By :Ali Uppal

The boundary layer thickness at a distance of l m from the leading edge of a flat plate, kept at zero angle of incidence to the flow direction, is O.l cm. The velocity outside the boundary layer is 25 ml sec. The boundary layer thickness at a distance of 4 m is__________________?

(A) 0.40 cm
(B) 0.20 cm
(C) 0.10 cm
(D) 0.05 cm

Submitted By :Ali Uppal

Two pipes of same length and diameters d and 2d respectively are connected in series. The diameter of an equivalent pipe of same length is________________?

(A) less than d
(B) between d and 1.5 d
(C) between 1.5 d and 2d
(D) greater than 2d

Submitted By :Ali Uppal

The length of a pipe is 1 km and its diameter is 20 cm. If the diameter of an equivalent pipe is 40 cm, then its length is_____________________?

(A) 32 km
(B) 20 km
(C) 8 km
(D) 4 km

Submitted By :Ali Uppal

When time of closure tc = L/v0 (where L is length of pipe and v0 is speed of pressure wavE., the portion of pipe length subjected to maximum head is__________________?

(A) L/4
(B) L/3
(C) L/2
(D) L

Submitted By :Ali Uppal

A valve is suddenly closed in a water main in wl.ich the velocity is 1 m/sec and velocity of pressure wave is 981 m/ sec. The inertia head at the valve will be________________?

(A) 1 m
(B) 10m
(C) 100m
(D) none of the above

Submitted By :Ali Uppal

In series-pipe problems_______________?

(A) the head loss is same through each pipe
(B) the discharge is same through each pipe
(C) a trial solution is not necessary
(D) the discharge through each pipe is added to obtain total discharge

Submitted By :Ali Uppal

If a sphere of diameter 1 cm falls in castor oil of kinematic viscosity 10 stokes, with a terminal velocity of 1.5 cm/sec, the coefficient of drag on the sphere is________________?

(A) less than 1
(B) between 1 and 100
(C) 160
(D) 200

Submitted By :Ali Uppal

The hydraulic grade line is_________________?

(A) always above the centre line of pipe
(B) never above the energy grade line
(C) always sloping downward in the direction of flow
(D) all of the above

Submitted By :Ali Uppal

Previous
First
....
27
28
29
30
31
....
281
Next