Time Left - 15:00 mins

ISRO CE Quiz 1- Hydrology

Attempt now to get your rank among 589 students!

Question 1

Which of the following statements are correct?
Titing concrete mixers are preffered in situ:
1) because problem of clogging the opening is avoided
2) for large constructions only
3) because they are suitable for dry mix
4) whenever the rated capacity is more than 200 litres

Question 2

It takes 0.4 hrs to drive from the garage to the head of the route, 0.4 hrs to drive between the route head and disposal site and 0.25 hrs to return from the disposal site. It takes 0.2 hrs to off-load a truck at the disposal site. The crew is permitted two 15-minute breaks and a further 30 minutes for miscellaneous delays. If two runs are made to the deposite site each day, how much time is left in an 8-hr nominal duty duration for refuse collection before starting to return to garage from disposal site? Take loading time as 30 minutes.

Question 3

For a rectangular channel section. Group I lists geometrical elements and Group II gives proportions for hydraulically efficient section
Group I
P. Top width
Q. Perimeter
R. Hydraulic Radius
S. Hydraulic Depth

Group–II
1. ye/2
2. ye
3. 2ye
4. 4 ye
ye is the flow depth corresponding to hydraulically efficient section. The correct match of group I with group II is

Question 4

The flow in a horizontal, frictionless rectangular open channel is supercritical. A smooth humps is built on the channel floor. As the height of hump is increased, chocked condition is attained. With further increase in the height of the hump, the water surface will

Question 5

The consumptive use of water for a crop during a particular stage of growth is 2.0mm / day. The maximum depth of available water is the root zone is 60mm. Irrigation is required when the amount of available water is 50% of the maximum available water in the root zone. Frequency of irrigation should be

Question 6

A jet of water 75 mm diameter having a velocity of 20 m/s, strikes normally at a flat smooth plate. If the plate moving in the same direction as the jet with a velocity of 5m/s. The work done per second on the plate is ________N-m.

Question 7

The velocity distribution over a flat plate is given by
                                                       
where ‘u’ is the velocity (in m/s) at a distance y (in m) above the plate and dynamic viscosity for the given fluid is 0.84 Ns/m2. The shear stress at a location 0.3 m above the plate is N times the shear stresses at a location 0.2 m, above the plate. The value of N would be

Question 8

A spillway is having 6 spans with clear width 10 m each. Thickness of each 90 ° cut water nose pier may be taken as 2.5 m. Take rounded abutment and effective height of water above spillway is 16.3 m. The effective length of spillway is _________ m.

Question 9

The concrete floor of a hand regulator is level with the channel bed and is 13 m long. The depth of upstream and downstream cutoff wall is 2.5 m and 2.0 m. The upstream F.S.L. is 1.5 m above the floor level, then the value of exit gradient is _____.
[Use Khosla's theory]

Question 10

An elementary triangular concrete gravity dam, supporting 60 m height of reservoir water and full uplift, should have a minimum base width (in m) equal to
[Take specific gravity of solid particles = 2.4 and coefficient of friction =0.7]
  • 589 attempts
  • 6 upvotes
  • 9 comments
Mar 19ESE & GATE CE