Fluid Mechanics Solved MCQ | Part 1

Akhand Dutta

Fluid Mechanics Solved Practice Questions | MCQ | GATE/ESE/PSU/NPTEL | Part 1 | By Akhand Dutta



Fluid Mechanics GATE Solved Questions | MCQ | Part 1






    1. A cylindrical water tank has a 2 m height and 2 m diameter. The water is filled up in the tank. The total weight of the water is (in kg). if the density of water is 1000 kg/m3.


    • A. 6283.18
    • B. 3141.59
    • C. 1570.80
    • D. 2000
     

    6283.18



    2. In the tank given in question 1, a small orifice is constructed to release the water. The orifice has a diameter of 2cm. Neglecting minor entry loss, the velocity of the flow (m/s) in the orifice is_______


    • A. 3.132
    • B. 6.264
    • C. 9.396
    • D. 12.528
     

    6.264



    3. As given in question 1 and question 2, the discharge in the orifice is ______ (in m3/s)


    • A. 0.19
    • B. 0.019
    • C. 0.0019
    • D. 1.9
     

    0.0019



    4. The water tank mentioned in question1 is placed on 6m height building. A pipe is fitted with the orifice of the tank to the ground. What is velocity of the flow in the pipe at the ground level (m/s).


    • A. 3.132
    • B. 6.264
    • C. 9.396
    • D. 12.528
     

    12.528



    5. A river flows with a velocity of 3m/s. A boat of maximum velocity 5m/s needs to travel in the river upstream direction. The travel distance is 100km. the travel time of the boat is_______ (hours)


    • A. 833.33
    • B. 13.89
    • C. 3.472
    • D. None
     

    13.89



    6. The boat given in question-5 travels downstream in a distance of 100km. The travel time in hours is


    • A. 3.472
    • B. 3.968
    • C. 5.567
    • D. 9.259
     

    3.472



    7. The cross section of the river is approximated as given in the figure: Estimate the discharge (flow rate in m3/s) of the river flowing with a velocity 2m/s.

    Fluid Mechanics GATE Solved Questions | MCQ | Part 1


    • A. 5000
    • B. 22500
    • C. 2812.5
    • D. 5625
     

    5625



    8. Reynolds number for a pipe of diameter ‘D’ is defined as


    • A. 𝝆VD/ μ
    • B. νD/𝝆
    • C. V2D/ g
    • D. ν3D/𝝆g
     

    𝝆VD/ μ



    9. Atmospheric pressure is measured in terms of


    • A. Dyne/cm2
    • B. N/m2
    • C. bar
    • D. atm
    • all of the above
    • none of the above
     

    all of the above



    10. As given in below figure what would be pressure at point A in kg/m2

    Fluid Mechanics GATE Solved Questions | MCQ | Part 1


    • A. 0
    • B. 7800
    • C. 5100
    • D. 2700
     

    5100



    11. If, for a fluid in motion, pressure at a point is same in all directions, then the fluid is


    • A. A real fluid
    • B. A Newtonian fluid
    • C. An ideal fluid
    • D. A non-Newtonian fluid
     

    A real fluid



    12. A floating body with its center of gravity at G, center of buoyancy at B and metacenter at M is stable when


    • A. BM>BG
    • B. BM=BG
    • C. BM less than BG
    • D. Cannot say
     

    BM>BG



    *Source- Books, Internet, NPTEL, Self-Analysis

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