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Free download in PDF Hydrology MCQs and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
81
Infiltration capacity of soil depends upon
[A]
Arrangement of soil particles
[B]
Shape and size of soil particles
[C]
Number of voids present in the soil
[D]
All the above
82
Which of the following spillways is least suitable for an earthen dam?
[A]
Ogee spillway
[B]
Chute spillway
[C]
Side channel spillway
[D]
Shaft spillway
83
In India the recording type rain gauge generally used, is
[A]
Float recording type
[B]
Weighing type
[C]
Tipping type
[D]
None of these
Answer: Float recording type
84
The critical depth in a channel can be produced
[A]
By raising the bottom of the channel
[B]
By lowering the bottom of the channel
[C]
By decreasing the width of the channel
[D]
Both (a) and (c) of above
Answer: Both (a) and (c) of above
85
The main cause of meandering is
[A]
Presence of an excessive bed slope in the river
[B]
Degradation
[C]
The extra turbulence generated by the excess of river sediment during floods
[D]
None of the above
Answer: The extra turbulence generated by the excess of river sediment during floods
86
The run off a drainage basin is
[A]
Precipitation - ground water accretion + initial recharge
[B]
Precipitation - ground water accretion - initial recharge
[C]
Initial recharge + ground water accretion + precipitation
[D]
Precipitation + ground water accretion + initial recharge
Answer: Precipitation - ground water accretion - initial recharge
87
The net speed under which the turbine reaches its peak efficiency is called
[A]
Rated speed
[B]
Gross speed
[C]
Design speed
[D]
None of these
88
Indian Meteorological department uses the standard gauges whose collectors have apertures of
[A]
100 or 200 sq. cm area
[B]
50 or 100 sq. cm area
[C]
100 or 150 sq. cm area
[D]
250 or 500 sq. cm area
Answer: 100 or 200 sq. cm area
89
The main function of a divide wall is to
[A]
Separate the under-sluices from weir proper
[B]
Provide smooth flow at sufficiently low velocity
[C]
Control the silt entry in the canal
[D]
Prevent river floods from entering the canal
Answer: Separate the under-sluices from weir proper
90
The rainfall at any place is described by
[A]
Its frequency
[B]
Its intensity
[C]
Its duration
[D]
All the above
91
Discharge curve may be extended by logarithmic method if
[A]
Cross section of river is uniform
[B]
River is broader and shallower
[C]
River is of any type
[D]
None of these
Answer: Cross section of river is uniform
92
An aggrading river is a
[A]
Scouring river
[B]
Both silting and scouring river
[C]
Silting river
[D]
Neither silting nor scouring river
73
For the upstream face of an earthen dam, the most adverse condition for stability of slope is
[A]
Sudden drawdown
[B]
Steady seepage
[C]
During construction
[D]
Sloughing of slope
94
Precipitation caused due to striking of air masses with a topographical feature, is called
[A]
Orographic precipitation
[B]
Convective precipitation
[C]
Cyclonic precipitation
[D]
None of those
Answer: Orographic precipitation
95
When a constant discharge 2.91 litres/sec. was obtained in a pumping test, the draw downs in the test wells at 3 m and 6.184 m were 2.6 m and 0.3 m respectively. If over-all depth of the pumping well was 16 m, the permeability of the soil, is
[A]
0.001 cm/sec
[B]
0.0005 cm/sec
[C]
0.002 cm/sec
[D]
0.01 cm/sec
96
The ratio of average values of shear stresses produced on the bed and the banks of a channel due to flowing water is
[A]
Greater than 1
[B]
Less than 1
[C]
Equal to 1
[D]
None of the above
97
If the axial length of a drainage basin is 35 km and its form factor is 0.2, the total area of the basin is
[A]
245 sq. km.
[B]
205 sq. km.
[C]
225 sq. km.
[D]
None
98
Unit Hydrograph theory was enunciated by
[A]
Le-Roy K. Shermen
[B]
Merril Bernard
[C]
W.W. Horner
[D]
Robert E. Horten
Answer: Le-Roy K. Shermen
99
The ratio of rate of change of the discharge of an outlet to the rate of change of the discharge of distributing channel is called
[A]
Flexibility
[B]
Sensitivity
[C]
Proportionality
[D]
None of the above
100
A repelling groyne is aligned
[A]
Parallel to bank
[B]
Pointing downstream
[C]
Pointing upstream
[D]
Perpendicular to bank
Answer: Pointing upstream
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