GATE Mechanical Engineering Fluid Mechanics Set 1

1. A body submerged in static fluid will undergo

(A) Longitudinal strain 

(B) Lateral strain
(C) Volumetric strain
(D) Zero Strain 
Ans: C: The pressure inside static fluid is same in all directions hence the body will undergo Volumetric strain


2. For water reservoir with pressure head of 500m which of the turbine is most suitable 
(A) Francis turbine
(B) Pelton wheel turbine
(C) Kaplan turbine
(D) None of the above

Ans: B: Pelton wheel turbine is suitable for high head water reservoir.

3. For steady laminar flow of s fluid between two plates, the velocity of fluid
(A) will be constant throughout the section.
(B) will be parabolic in nature.
(C) will be random through out the section
(D) None of the above

Ans: B: For steady laminar flow of s fluid between two plates, the velocity of fluid will be parabolic in nature.
            Maximum at the center and zero near the plates. 

4. Match the following 

1. Pelton wheel turbine            a. Medium Head  Medium Discharge
2. Francis turbine                    b. Low Head High Discharge
3. Kaplan turbine                     c. High Head Low Discharge

(A) 1-c, 2-a, 3-b
(B) 1-b, 2-a, 3-c
(C) 1-a, 2-b, 3-c
(D) 1-b, 2-a, 3-c

Ans: A: 1-c, 2-a, 3-b.


5. A Pitot tube converts
(A) pressure head to potential head.
(B) kinetic head to potential head.
(C) kinetic head to pressure head
(D) potential head to kinetic head

Ans: C: Pitot tube is used to measure the velocity of fluid in pipe which converts kinetic head to pressure head. 

GATE Mechanical Engineering Fluid Mechanics Set 2