Online Civil Engineering Test - Irrigation Test

Instruction:

  • This is a FREE online test. Beware of scammers who ask for money to attend this test.
  • Total number of questions: 20.
  • Time allotted: 30 minutes.
  • Each question carries 1 mark; there are no negative marks.
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  • All the best!

Marks : 2/20


Total number of questions
20
Number of answered questions
0
Number of unanswered questions
20
Test Review : View answers and explanation for this test.

1.
Pick up the incorrect statement from the following:
In free flooding irrigation, water is admitted at one corner of a field and is allowed to spread over the entire area
In check method of irrigation, the field is divided into smaller compartments and water is admitted to each in turn
In furrow irrigation water is admitted between the rows of plants in the field
None of these.
Your Answer: Option
(Not Answered)
Correct Answer: Option

2.
The intensity of irrigation means
percentage of culturable commanded area to be irrigated annually
percentage of gross commanded area to be irrigated annually
percentage of the mean of culturable commanded area and the gross commanded area to be irrigated annually
total depth of water supplied by the number of waterings.
Your Answer: Option
(Not Answered)
Correct Answer: Option

3.
F.S.L. of a canal at its head with respect to parent channel is kept
at the same level
15 cm lower
15 cm higher
none of these.
Your Answer: Option
(Not Answered)
Correct Answer: Option

4.
A water-logged land is found suitable for cultivation due to
ease of tillage for preparation of the field for optimum condition of germination
absence of aeration of soil from root zone of the plant
regular supply of water to plants from the water table by capillary action
none of these.
Your Answer: Option
(Not Answered)
Correct Answer: Option

5.
When a canal is carried over a natural drainage, the structure provided, is known as
syphon
aqueduct
super passage
syphon-aqueduct.
Your Answer: Option
(Not Answered)
Correct Answer: Option

6.
Attracting groynes are built
perpendicular to the bank
inclined down stream
inclined up stream
none of these.
Your Answer: Option
(Not Answered)
Correct Answer: Option

7.
The state of the soil when plants fail to extract sufficient water for their requirements, is
maximum saturated point
permanent wilting point
ultimate utilisation point
none of these.
Your Answer: Option
(Not Answered)
Correct Answer: Option

8.
In north Indian Plains, optimum depth of kor watering for wheat, is
23.0 cm
19.0 cm
17.5 cm
13.5 cm
12.0 cm
Your Answer: Option
(Not Answered)
Correct Answer: Option

9.
The Lacey's regime velocity is proportional to
R1/2 S3/4
Q3/4 S1/3
R3/4 S1/3
R2/3 S1/2
Your Answer: Option
(Not Answered)
Correct Answer: Option

10.
A fall in a canal bed is generally provided, if
ground slope exceeds the designed bed slope
designed bed slope exceeds the ground slope
ground slope is practically the same as the designed bed slope
none of these.
Your Answer: Option
(Not Answered)
Correct Answer: Option

11.
In Montague type fall
a straight glacis is provided
a circular glacis is provided
a parabolic glacis is provided
no glacis is provided.
Your Answer: Option
(Not Answered)
Correct Answer: Option

12.
The down stream expansion head of a guide bank is extended to subtend an angle at the centre, equal to
30°
45°
60°
90°
Your Answer: Option
(Not Answered)
Correct Answer: Option

13.
Lacey's equation for calculating flood discharge in rivers, is
V = 10.8 R1/2 S1/2
V = 10.8 R2/3 S1/2
V = 10.8 R2/3 S1/3
V = 10.8 R1/3 S2/3
Your Answer: Option
(Not Answered)
Correct Answer: Option

14.
Pick up the correct statement from the following:
Water table generally follows the ground surface above it with a few exceptions
Static level of water in an open well indicates the position of the water table
Saturated pores of a soil in the capillary zone above water table have negative pressure
At water table, hydrostatic pressure is zero
All the above.
Your Answer: Option
(Not Answered)
Correct Answer: Option

15.
The ratio of the rate of change of discharge of an outlet to the rate of change in level of water surface in a distributary at its normal depth, is known as
efficiency
sensitivity
flexibility
modular limit.
Your Answer: Option
(Not Answered)
Correct Answer: Option

16.
In a concrete canal the approximate permissible velocity of water should not exceed
0.5 m/sec
1 m/sec
1.5 m/sec
2 m/sec
2.5 m/sec
Your Answer: Option
(Not Answered)
Correct Answer: Option

17.
If A is the area of the surface, x is the depth of its C.G. from the surface of the water and ω is the density of water, then
total pressure on the surface is equal to ω x
depth of the point at which total pressure acts is equal to its moment of inertia divided by A x
depth of the centre of pressure is 2/3H vertically below the surface
all the above.
Your Answer: Option
(Not Answered)
Correct Answer: Option

18.
If the height of the hydraulic gradient line above the floor of thickness t is h and the specific gravity of the material of the floor is G, the minimum thickness t of the floor down stream of the crestwall, is given by the equation
Your Answer: Option
(Not Answered)
Correct Answer: Option

19.
To control the silt entry into a distributary at head regulator, King's vanes are provided which are the walls
of R.C.C. or steel plate 8 cm thick
of height l/3rd to l/4th the depth of water in the main canal
spaced at interval of times their heights
extending about one metre beyond a line drawn at an inclination of 2 : 1 to the axis of main canal
all the above.
Your Answer: Option
(Not Answered)
Correct Answer: Option

20.
Cross regulators in main canals are provided
to regulate water supply in the distributaries
to increase water head upstream when a main canal is running with low supplies
to overflow excessive flow water
none of these.
Your Answer: Option
(Not Answered)
Correct Answer: Option

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