A. 3.75 m

B. 4.0 m

**C. 4.2m**

D. 4.5m

### Related Mcqs:

- A right circular cylinder open at the top is filled with liquid and rotated about its vertical axis at such a speed that half the liquid spills out, then the pressure intensity at the center of bottom is___________________?
**A. zero**

B. one-fourth its value when cylinder was full

C. one-half its value when cylinder was full

D. cannot be predicted from the given data - The position of center of pressure on a plane surface immersed vertically in a static mass of fluid is______________?
A. at the centroid of the submerged area

B. always above the centroid of the area

**C. always below the centroid of the area**

D. none of the above - The depth â€˜dâ€™ below the free surface at which the point velocity is equal to the average velocity of flow for a uniform laminar flow with a free surface, will be_________________?
A. 0.423 D

**B. 0.577 D**

C. 0.223 D

D. 0.707 Dwhere D is the depth of flow

- The total pressure on a plane surface inclined at an angle 9 with the horizontal is equal to_______________?
**A. PA**

B. pA sin 9

C. pA cos 9

D. pA tan 9where p is pressure intensity at centroid of area and A is area of plane surface

- Coefficient of discharge for a totally submerged orifice as compared to that for an orifice discharging free is__________________?
**A. slightly less**

B. slightly more

C. nearly half

D. equal - An open tank contains 1 m deep water with 50 cm depth of oil of specific gravity 0.8 above it. The intensity of pressure at the bottom of tank will be________________?
A. 4 kN/m2

B. 10 kN/m2

C. 12 kN/m2

**D. 14 kN/m2** - A rectangular block 2 m long, 1 m wide and 1 m deep floats in water, the depth of immersion being 0.5 m. If water weighs 10 kN/m3, then the weight of the block is________________?
A. 5kN

**B. lOkN**

C. 15 kN

D. 20 kN - 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 cmAssume that boundary layer is entirely laminar

- When a liquid rotates at a constant angular velocity about a vertical axis as a rigid body, the pressure intensity varies________________?
A. linearly with radial distance

**B. as the square of the radial distance**

C. inversely as the square of the radial distance

D. inversely as the radial distance - Due to each end contraction, the discharge of rectangular sharp crested weir is reduced by________________?
**A. 5%**

B. 10%

C. 15%

D. 20%