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  • Question

  • If v1 and v2 are the velocities of flow before and after sudden enlargement in a pipe, the head loss given by Carnot and Borda equation, is


  • Options
  • A. (v22 - v12)/2g
  • B. (v1 - v2)2/2g
  • C. (v2 - v1)2/2g
  • D. (v1 + v2)2/2g.

  • Correct Answer
  • (v1 - v2)2/2g 

    • More questions

    • 1. The pH value of water is kept slightly less than 7 so that hydrochloride ions may combine with ammonia ions to form

    • Options
    • A. Mono-chloramine (NHCl)
    • B. Di-chloramine (NH2Cl)
    • C. Nitrogen trichloramine (NCl3)
    • D. All the above.
      • Discuss
    • 2. The ratio of the reactions RA and RB of a simply supported beam shown in below figure is

    • Options
    • A. 0.50
    • B. 0.40
    • C. 0.67
    • D. 1.00
    • E. 1.50
      • Discuss
    • 3. The check rails are placed opposite the crossing so that

    • Options
    • A. it is symmetrically placed opposite nose of crossing
    • B. its one-third length is ahead of the nose of crossing
    • C. its two-third length is ahead of the nose of crossing
    • D. its three fourth length is ahead of the nose of crossing.
      • Discuss
    • 4. The following statement is one of the laws of Dynamic friction

    • Options
    • A. The force of friction always acts in a direction opposite to that in which a body is moving
    • B. The magnitude of the kinetic friction bears a constant ratio to the normal reaction between two surfaces. The ratio being slightly less than that in the case of limiting friction
    • C. For moderate speeds the force of friction remains constant but decreases slightly with the increase of speed
    • D. all the above.
      • Discuss
    • 5. If the strain energy stored per unit volume in a hollow shaft subjected to a pure torque when t attains maximum shear stress fs the ratio of inner diameter to outer diameter, is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 6. Pick up the incorrect statement from the following :

    • Options
    • A. while measuring a distance with a tape of length 100.005 m, the distance to be increasing by 0.005 m for each tape length
    • B. an increase in temperature causes a tape to increase in length and the measured distance is too large
    • C. the straight distance between end points of a suspended tape is reduced by an amount called the sag correction
    • D. a 100 m tape of cross section 10 mm x 0.25 mm stretches about 10 mm under 5 kg pull.
      • Discuss
    • 7. Pick up the correct statement from the following:

    • Options
    • A. Hoop strain of the walls of a cylinder due to liquid is
    • B. Longitudinal strain in the walls of a cylinder due to liquid is
    • C. Volumetric change in the cylinderdue to liquid is
    • D. All the above.
      • Discuss
    • 8. The ratio of the inertia and gravitational force acting in any flow, ignoring other forces, is called

    • Options
    • A. Euler number
    • B. Frode number
    • C. Reynold number
    • D. Weber number.
      • Discuss
    • 9. For battened struts, the effective length is increased by

    • Options
    • A. 5%
    • B. 7.5%
    • C. 10%
    • D. 12.5%
    • E. 15%
      • Discuss
    • 10. Stress may be expressed in Newtons

    • Options
    • A. per millimetre square (N/mm2)
    • B. per centimetre square (N/cm2)
    • C. per metre square (N/m2)
    • D. none of these.
      • Discuss

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