# Practice Test: Question Set - 07

**1. For the estimate of high floods in fan-shaped catchment, the formula used is**

- (A) Dicken's
formula

- (B) Ryve's
formula

- (C) Inglis
formula

- (D) None of
these

**2. The major resisting force in a gravity dam is**

- (A) Water
pressure

- (B) Wave
pressure

- (C) Self-weight
of dam

- (D) Uplift
pressure

**3. Hydrograph is a graphical representation of**

- (A) Surface
run off

- (B) Ground
water flow

- (C) Rain fall

- (D) Discharge
flowing in the river

**4. Seepage through embankments in an earthen dam is controlled by**

- (A) Drainage
filters

- (B) Relief
wells

- (C) Drain
trenches

- (D) Provision
of downstream berms

**5. Indian Meteorological department uses the standard gauges whose collectors have apertures of**

- (A) 50 or 100
sq. cm area

- (B) 100 or 150
sq. cm area

- (C) 100 or 200
sq. cm area

- (D) 250 or 500
sq. cm area

**6. The main function of a divide wall is to**

- (A) Control
the silt entry in the canal

- (B) Prevent
river floods from entering the canal

- (C) Separate
the under-sluices from weir proper

- (D) Provide
smooth flow at sufficiently low velocity

**7. The rainfall at any place is described by**

- (A) Its
intensity

- (B) Its
duration

- (C) Its
frequency

- (D) All
the above

**8. The sensitivity of a rigid module is**

- (A) Zero

- (B) Between
zero and one

- (C) 1

- (D) Infinity

**9. 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

**10. An aggrading river is a**

- (A) Silting
river

- (B) Scouring
river

- (C) Both
silting and scouring river

- (D) Neither
silting nor scouring river

**11. Izzard formula for the time of concentration in minutes for the plots having no channels, is (where**

*L*is the length of overland flow in metres and_{o}*Kp*rainfall intensity in cm/hour)- (A)

*T*= 111

*b.*

*L*

_{0}^{1/3}/(

*Kp*)

^{2/3}

- (B)

*T*= 222

*b.*

*L*

_{0}

^{1/2}/(

*Kp*)

^{1/3}

- (C)

*T*= 333

*b.*

*L*

_{0}/

*Kp*

- (D)

*T*= 111

*b.*

*L*

_{0}

^{1/3}/(

*Kp*)

^{2/5}

**12. Lining of irrigation channels**

- (A) Increases
the water-logging area

- (B) Decreases
the water-logging area

- (C) Does
not change the water logging area

- (D) None
of the above

**13. The equation**

*V*= (1000*ID*_{10}^{2}/60) × (1.8*T*+ 42) which is used for determining the velocity of ground water flow in metres per day is known as- (A) Meinzer's
formula

- (B) Slichter's
formula

- (C) Darcy's
formula

- (D) Hazen
formula

**14. The stage of river carrying a discharge of Q m/sec at a point is 10 m and slope of water surface is (1/4000). The discharge of a flood same point and same stage of 10 m with a water surface slope of (1/1000) will be**

- (A) V

_{2}Q m

^{3}/sec

- (B) 0.5 Q m

^{3}/sec

- (C) 2 Q m

^{3}/sec

- (D) 4 Q m

^{3}/sec

**15. In the estimate of design flood, Dickens assumes that high flood in cumecs, is proportional to catchment area raised to the power**

- (A) 1/4

- (B) 1/2

- (C) 3/4

- (D) 2/3

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