### MCQs of Hydrologic Analysis

Showing 1 to 7 out of 7 Questions
1.

A hydraulic structure has an expected life of 25 years and is designed for a flood magnitude of return period 50 years. The risk of failure of the structure during its life is

 (a) 0.87 (b) 0.4 (c) 0.6 (d) 0.13
2.

From the past rainfall records at a place, it was observed obtained that a maximum rainfall depth of 200 mm in 12-h has a return period of 50 years. The probability of a 12- h rainfall equal to or greater than 200 mm occurring at the same place at least once in 30 years is _____________ %.

 (a) 45.5 (b) 40 (c) 43 (d) 42
3.

The probability of occurrence of a flood equal to or greater than 20 years flood exactly once during the next 20 years is ____________.

 (a) 0.377 (b) 0.3 (c) 0.2 (d) 0.28
4.

In the Muskingum method of channel routing, the routing equation is written as Q2 = C0I2 + C1I1 + C2Q1. If the coefficients are K = 12 h and x = 0.15 and the time step for routing Δt = 4h, then the coefficient C0 is____________.

 (a) 0.16 (b) 0.016 (c) 0.01 (d) 0.09
5.

If a bridge is designed for a 50 year flood, then the probability that only one flood of the design capacity or higher will occur in the 75 years life of the bridge is _____________.

 (a) 0.34 (b) 0.22 (c) 0.03 (d) none of these
6.

An annual flood series contains 100 years of flood data. For a return period of 200 years the Gumbel’s reduced variate can be taken as ___________.

 (a) 5.3 (b) 3 (c) 2 (d) 1
7.

A 1 hour rainfall of 10 cm has return period of 50 year. The probability of occurence of 1 hour of rainfall 10 cm or more will occur in each of two successive year is

 (a) 0.04 (b) 0.2 (c) 0.02 (d) 0.0004
Showing 1 to 7 out of 7 Questions