Questions and answers for exam Preparation

MCQs

Total Questions : 845 | Page 84 of 85 pages

Question 831. Instantaneous unit hydrograph is a hydrograph ofi) unit durationii) unit rainfall excessiii) infinitely small durationiv) infinitely small rainfall excessThe correct answer is

(iii) and (iv)
(ii) and (iii)
(i)and(iv)
(i) and (ii)

Discuss Question

Answer: Option B. -> (ii) and (iii)

Question 832. A current meter is used to measure the

velocity of flow of water
None of these
depth of flow of water
discharge

Discuss Question

Answer: Option A. -> velocity of flow of water

Question 833. To estimate the magnitude of a flood with a return period of T years, Gumbel’s distribution method requires the following data pertaining to annual flood seriesi) mean valueii) standard deviationiii) length of recordiv) coefficient of skewThe correct answer is

(i), (ii), (iii) and (iv)
(i) and (ii)
(i), (ii) and (iv)
(i),(ii) and (iii)

Discuss Question

Answer: Option D. -> (i),(ii) and (iii)

Question 834. Presence of tail water in a gravity dami) increases the principal stressii) decreases the principal stressiii) increases the shear stressiv) decreases the shear stressThe correct answer is

(ii) and (iii)
(ii) and (iv)
(i)and(iv)
(i) and (iii)

Discuss Question

Answer: Option B. -> (ii) and (iv)

Question 835. Assertion A : To estimate the rainfall over a catchment, the number of raingauges required per unit area is large for hilly areas.Reason R : Rainfall gradient is steep.Select your correct answer according to the coding system given below :

A is false but R is true
Both A and R are true and R is the correct explanation of A
A is true but R is false
Both A and R are true but R is not the correct explanation of A

Discuss Question

Answer: Option B. -> Both A and R are true and R is the correct explanation of A

Question 836. Solution of Laplacian equation in three dimensions d²φ/dx² + d²φ/dy² + d²φ/dz² = 0 of water in a syphon, is done by

Analytical method
Khosla's method
Unwin's method
Method of relaxation

Discuss Question

Answer: Option D. -> Method of relaxation

Question 837. The maximum rainfall depth of 300 mm in 24 hours has a return period of 100 years. The probability of 24 hours rainfall equal to or greater than 300 mm occurring at least once in 10 years is given by

1 – (0.99)10
(0.99)10
l-(0.9)100
(0.9)00

Discuss Question

Answer: Option A. -> 1 – (0.99)10

Question 838. In case of a trapezoidal notch fall

Top length of the piers should not be less than their thickness
All listed here
Splay downstream from the notch section is 22½°
Splay upstream from the notch section is 45°

Discuss Question

Answer: Option B. -> All listed here

Question 839. If the irrigation efficiency is 80%, conveyance losses are 20% and the actual depth of watering is 16 cm, the depth of water required at the canal outlet, is