Previous Year GATE MCQ’s on Fluid Statics

Solved GATE Questions on Fluid Statics

Question 1. The horizontal and vertical hydrostatic forces  on the semi-circular gate, having a width w into the plane of figure, are

(A) 

(B) 

(C) 

(D) 

GATE-ME-2001

Hint

Question 2. A water container is kept on a weighing balance. Water from tap is falling vertically into the container with a volume flow rate of Q; the velocity of water when it hits the water surface is U. At a particular instant of time the total mass of the container and water is m. The force registered by the weighing balance at this instant of time is

(A) 

(B) 

(C) 

(D) 

GATE-ME-2003

Hint

Question 3. A cylindrical body of cross-sectional area A, height H and density , is immersed to depth h in a liquid of density , and tied to the bottom with a string. The tension in the string is

(A) 

(B) 

(C) 

(D) 

GATE-ME-2003

Hint

Question 4. The pressure gauge  installed on the system show pressures of . The value of unknown pressure P is

(A) 1.01 bar

(B) 2.01 bar

(C) 5.00 bar

(D) 7.01 bar

GATE-ME-2004

Hint

Question 5. A closed cylinder having a radius R and height H is filled with oil of density . If the cylinder is rotated about its axis at an angular velocity of , then thrust at the bottom of the cylinder is

(A) 

(B) 

(C) 

(D) 

GATE-ME-2004

Hint

Question 6. A U-tube manometer with a small quantity of mercury is used to measure the static pressure difference between two locations A and B in a conical section through which an incompressible fluid flows. At a particular flow rate, the mercury column appears as shown in the figure. The density of the mercury is 13600  and g=9.81 . Which of the following is correct?

(A) Flow direction A to B and 

(B) Flow direction is B to A and 

(C) Flow direction is  A to B and 

(D) Flow direction is B to A and 

GATE-ME-2005

Hint

Question 7. For the stability of a floating body, under the influence of gravity alone, which of the following is TRUE?

(A) Metacentre should be below centre of gravity.

(B) Metacentre should be above centre of gravity.

(C) Metacentre and the centre of gravity must lie on the same horizontal line.

(D) Metacentre and centre of gravity must lie on the same vertical line.

GATE-ME-2010

Hint

Question 8. A hinged gate of length 5m, inclined at 30° with the horizontal and with water mass on its left, is shown in the figure below. Density of water is 1000 . The minimum mass of the unit width (perpendicular to the plane of paper), required to keep it closed is

(A) 5000

(B) 6000

(D) 7546

(D) 9623

GATE-ME-2013

Hint

Answer Keys