Question-Answer

The distance between successive vehicles moving in the same line measured from head at any instance is

• (a) the space headway
  
• (b) the time headway
• (c) the one-way stream
  
• (d) the head-way stream

(A)

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The roads which are provided with a hard pavement course having at least a water bound macadam (WBM) layer are classified as

• (a) Paved roads
  
• (b) Unpaved roads
• (c) Surface roads
  
• (d) Unsurfaced roads

(A)

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The planning surveys about engineering studies consists of

• (a) Income per capita
  
• (b) Living standard
• (c) Traffic volume
  
• (d) Road location and alignment studies

(D)

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A cipolletti weir has length of 2.0 m and head over the weir is 1 m. What is the discharge over the weir? (Take C_d = 0.62)

• (a) 10.35 m3/s
  
• (b) 3.66 m3/s
• (c) 45.21 m3/s
  
• (d) 75.68 m3/s

(B)
Q = 2 /3 C_d (2g)^1/2 H^3\2

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Which one of the following is an advantage using a triangular notch over a rectangular notch?

• (a) Ventilation of a triangular notch is necessary
  
• (b) The same triangular notch cannot measure a wide range of flows accurately
  
• (c) For heavy discharges, a triangular notch gives more accurate results than a rectangular notch.
  
• (d) In a given triangular notch, only one reading is required to be taken for the measurement of discharge

(D)
A triangular notch is preferred to a rectangular notch due to following reasons:
1. The expression for discharge for a right angled V-notch is very simple.
2. For measuring low discharge, a triangular notch gives more accurate results than
a rectangular notch.
3. In case of triangular notch, only one reading, i.e., H is required for the computation
of discharge.
4. Ventilation of triangular notch is not necessary.

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Question-Answer civil engineering study

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