Lakshya Education MCQs

Question: The component of acceleration resulting due to unsteady nature of flow is called __________ acceleration.
Answer: Option B

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Question 1. The equation relating friction factor to Reynold number, f-0.5 = 4 loge (NRe/√f)-0.4, is called the __________ equation.
  1.    Nikuradse
  2.    Von-Karman
  3.    Blausius
  4.    Colebrook
Answer: Option A
Question 2. Friction produced by the formation of wakes is called the __________ friction.
  1.    Disk
  2.    Skin
  3.    Form
  4.    None of these
Answer: Option C
Question 3. Centre of pressure of a plane surface of arbitrary shape immersed vertically in a static mass of fluid
  1.    Lies above the centroid of the plane surface
  2.    Is independent of the specific weight of the fluid
  3.    Is different for different fluids
  4.    Is at the centroid of the plane surface
Answer: Option B
Question 4. Which of the following two quantities when same, makes one pipe system equivalent to another pipe system?
  1.    Head & discharge
  2.    Length & discharge
  3.    Length & diameter
  4.    Friction factor & diameter
Answer: Option A
Question 5. The equivalent diameter for fluid flow through square cross section channel of side 'x', for pressure drop calculation purpose is given by
  1.    4x
  2.    2x
  3.    x
  4.    √x
Answer: Option C
Question 6. The pipe wall thickness is minimum for a pipe of given nominal size having schedule number
  1.    160
  2.    120
  3.    80
  4.    40
Answer: Option D

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