Table of Contents
Punjab Irrigation Department Sub-Engineer Jobs 2018
PPSC Sub-Engineer Past Papers Solved
Question No. 01
The consumptive use of water for a crop…
- Is measured as the volume of water per unit area.
- Is measured as the depth of water in irrigated area.
- May be supplied partly by precipitation and partly by irrigation.
- All of the above.
Answer:- D
Question No. 02
Canals taken off from ice-fed perennial rivers are known…
- Permanent canals
- Ridge canals
- Perennial canals
- Inundation canals
Answer:- C
Question No. 03
In gravity canals, F.S.L. is…
- Always at the ground level.
- Always below the ground level.
- Generally 4 to 5 meters above the ground level.
- Only a few cm above the ground level.
Answer:- D
Question No. 04
The field capacity of the soil is 25%, its permanent wilting point is 15% and its specific dry unity weight is 1.5. If the depth of the root zone of a crop, is 80 cm, the storage capacity of the soil, is…
- 8 cm.
- 10 cm.
- 12 cm.
- 14 cm.
Answer:- C
Question No. 05
If the water table is comparatively high, the irrigation canal becomes useless, due to…
- A Large amount of seepage.
- Water logging of the cultivated areas.
- Uncertain water demand.
- All of the above.
Answer:- D
Question No. 06
If A is the area of the surface, the density of water, then…
- The total pressure on the surface is e.
- Depth of the point at which total pressure acts is equal to its moment of inertia divided by.
- The depth of the center of pressure is 2/3H vertically below the surface.
- All of the above.
Answer:- D
Question No. 07
In a siphon aqueduct…
- Drainage passes over the canal and F.S.L. of the canal is below the bottom of the drainage trough.
- Drainage passes over the canal and F.S.L. of the canal is above the bottom of the drainage trough.
- Canal passes over the drainage and H.F.L. of the drainage is above the bottom of the canal trough.
- Canal passes over the drainage and H.F.L. of the drainage is below the bottom of the canal trough.
Answer:- C
Question No. 08
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 downstream of the crest-wall is given by the equation…
- t = (h + 1)/(G + t)
- t = (h – 1)/(G + t)
- t = (h – 1)/(G – t)
- t = (h + 1)/G
Answer:- C
Question No. 09
To hold hydraulic jumps, baffle walls are provided in…
- Sarda-type falls
- English-type falls
- Montague-type falls
- Vertical-type falls
Answer:- B
Question No. 10
Pick up the correct sequence of the part of a canal system from the following…
- Head work-distributary-branch canal- minor.
- Head works-main canal-branch canal-distributary-minor.
- Head works-main canal-branch canal-minor-distributary.
- Heads works-branch canal-main canal distributary, minor.
Answer:- B
Question No. 11
The field capacity of soil depends upon…
- Capillary tension in the soil.
- The porosity of the soil.
- Both (a) and (b).
- Neither (a) nor (b).
Answer:- C
Question No. 12
The water face of the guide banks is protected by…
- One-man stone pitching.
- Two-man stone pitching.
- Three-man stone pitching.
- Four-man stone pitching.
Answer:- A
Question No. 13
Pick up the correct statement from the following…
- Escapes are essential safety valves in a canal system.
- The escapes must lead the surplus water to natural drainages.
- The escapes are aligned to take advantage of the contours of lower values.
- All of the above.
Answer:- D
Question No. 14
For a unique design of a channel by Kennedy’s theory…
- Its breadth must only be known.
- Its depth must only be known.
- Its breadth and depth ratio must only be known.
- All of the above.
Answer:- C
Question No. 15
The structure constructed to allow drainage water to flow under pressure through an inverted syphon below a canal is called…
- Syphon
- Super passage
- Super-aqueduct
- Syphon aqueduct
Answer:- D
Question No. 16
The main cause of silting up a channel is…
- Non-regime section
- Inadequate slope
- Defective head regulator
- All of the above
Answer:- D
Question No. 17
Pick up the correct statement from the following…
- Gravity water is harmful to crops.
- Hygroscopic water remains attached to soil molecules by a chemical bond.
- Capillary moisture held in the soil pores against gravity by surface tension is utilized by plants.
- All of the above.
Answer:- C
Question No. 18
River training work is generally required when the river is…
- Meandering
- Aggrading
- Degrading
- All the above
Answer:- A
Question No. 19
When a canal flowing under pressure is carried below natural drainage such that its F.S.L. does not touch the underside of the supporting structure, the structure so provided, is called…
- Syphon
- Aqueduct
- Super passage
- Syphon-aqueduct
Answer:- C
Question No. 20
Pick up the correct statement from the following…
- In a level crossing, a crest with its top at the canal F.S.L. is provided across the drainage at its upstream junction with the canal.
- In a level crossing a regulator is provided across the drainage at its downstream.
- In a level crossing, a cross regulator is provided on the canal below the crossing.
- All of the above.
Answer:- D
Question No. 21
In a Sarda-type fall, the rectangular crest may be used for discharge up to…
- 6 cumecs
- 10 cumecs
- 14 cumecs
- 20 cumecs
Answer:- C
Question No. 22
The measure to remove water logging of land is…
- To reduce percolation from canals and water courses.
- To increase outflow from the groundwater reservoir.
- Both (a) and (b).
- Neither (a) nor (b).
Answer:- C
Question No. 23
Borrow pits should preferably be located in…
- Field on the left side of the canal.
- Field on the right side of the canal.
- Fields on both sides of the canal.
- The central half-width of the section of the canal.
Answer:- D
Question No. 24
The sinuosity of a meander is the ratio of…
- Meander length and the width of the meander.
- Meander the length and half-width of the river.
- Curved length and the straight distance.
- None of these.
Answer:- C
Question No. 25
Pick up the correct statement from the following…
- If the flexibility is more than one, the outlet is hyper-proportional.
- If the setting of an outlet is higher than that required for proportionality, the outlet is hyper-proportional.
- If the flexibility is zero, it is a rigid module.
- All of the above.
Answer:- D
Question No. 26
According to Khosla, the exits gradient of surface flow…
- Depends upon the b/d ratio.
- Is independent of the b/d ratio.
- Is independent of the depths of d/s cut-off walls.
- None of these.
Answer:- A
Question No. 27
A hydraulic structure is designed to withstand…
- Seepage forces
- Hydraulic jump
- Hydraulic pressure
- All of the above
Answer:- D
Question No. 28
If the optimum depth of kor watering for a crop is 15.12 cm, the outlet factor for the crop for four week period in hectares per cumec is…
- 1000
- 1200
- 1400
- 1600
Answer:- D
Question No. 29
In Montague-type fall…
- A straight glacis is provided.
- A circular glacis is provided.
- A parabolic glacis is provided.
- No glacis is provided.
Answer:- C
Question No. 30
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 of water.
- None of these.
Answer:- B
Question No. 31
According to Lacey, the depth of scour in a river depends upon the straightness of the reach. If D is the depth of scour in regime flow in a right-angled bend, it is…
- 1.25 D
- 1.50 D
- 1.75 D
- 2.00 D
Answer:- D
Question No. 32
According to Lacey, in regime conditions…
- Silt is kept in suspension by vertical components of eddies.
- The entire cross-section of the channel is generated at all points by the forces normal to the wetted perimeter.
- Both (a) and (b).
- Neither (a) nor (b).
Answer:- C
Question No. 33
The most suitable section of a lined canal is…
- Triangular section with circular bottom for small canals.
- Trapezoidal section with rounded corners for large canals.
- Both (a) and (b).
- None of these.
Answer:- C
Question No. 34
An outlet is said to be proportional if its flexibility, is…
- Zero
- Less than one
- More than one
- One
Answer:- D
Question No. 35
The level of the floor of a syphon aqueduct can be obtained…
- By subtracting the depth of the culvert from the canal bed level.
- By subtracting the thickness of the culvert plus the depth of the culvert from the canal bed level.
- Both (a) and (b).
- None of these.
Answer:- B
Question No. 36
If the straight sides of a triangular section of a lined canal with the circular bottom of radius D, make th horizontal, the hydraulic mean depth is…
- D
- D /2
- D/3
- D/5
Answer:- B
Question No. 37
According to Bligh’s creep theory, percolating water flows along…
- Straight path under the foundation of the dam.
- Circular path under the foundation of the dam.
- The outline of the base of the foundation of the dam.
- None of these.
Answer:- D
Question No. 38
For a standing crop, the consumptive use of water is equal to the depth of water…
- Transpired by the crop.
- Evaporated by the crop.
- Transpired and evaporated by the crop.
- Used by the crop in transpiration, evaporation, and also the quantity of water evaporated from adjacent soil.
Answer:- D
Question No. 39
Bed bars in a canal are provided…
- To watch the general behavior of the canal.
- To measure the discharge.
- To raise the supply level.
- To control the silting.
Answer:- A
Question No. 40
The velocity of drainage water in the barrels of a syphon-aqueduct is normally limited to…
- 1 to 2 m per second.
- 2 to 3 m per second.
- 3 to 4 m per second.
- 4 to 5 m per second.
Answer:- B
Question No. 41
For the design of major hydraulic structures on the canals, the method generally preferred, is based on…
- Bligh’s theory.
- Electrical analogy method.
- The relaxation method.
- Khosla’s method of independent variables.
Answer:- D
Question No. 42
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 the 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.
Answer:- D
Question No. 43
Pick up the incorrect statement from the following…
- The side walls of a venturi head flume are splayed out from the end of the throat at 1: 10 for a length of 4.5 m.
- The length of side walls should be such that the width of the flume is made equal to 2/3rd the bed width of the distributary.
- Once the width of the flume becomes 2/3rd of the width of the distributary, the splayed walls are increased to 1 in 3 to get full bed width.
- None of these.
Answer:- D
Question No. 44
Irrigation canals are generally aligned along…
- Ridgeline
- Contour line
- Valley line
- Straight line
Answer:- A
Question No. 45
In a canal syphon, the flow is…
- Under atmospheric pressure
- Pipe flow
- With critical velocity
- Under negative pressure
Answer:- B
Question No. 46
Pick up the correct statement from the following…
- The approach of the water line in a flumed channel section should not be steeper than 22½°.
- The departure of the water line from a flumed channel section should not be steeper than 30°.
- The approach of the water line should not be steeper than 30° and the departure line not be steeper than 22½° in a flumed channel section.
- Approach and departure of the water line in a flumed channel section, should not be steeper than 22½°.
Answer:- C
Question No. 47
The main function of a diversion head works of a canal from a river, is…
- To remove silt
- To control floods
- To store water
- To raise the water level
Answer:- D
Question No. 48
Pick up the correct statement from the following…
- The full supply level of a canal should be above ground level.
- According to Lacey, regime conditions require a particular slope for a given discharge and silt factor.
- In case the ground slope is less than the required bed slope, the silt factor must be reduced by permitting the entry of coarse silt.
- All of the above.
Answer:- D
Question No. 49
If d1 is the depth of cutting, d2 is the height of the bank from bed level r2: 1 and r1: 1 are the slopes in filling and cutting respectively, the horizontal distance n between the bed and bank, is…
- x = r1 d1
- x = r2 d2
- x = d1 / r1
- x = d / r
Answer:- B
Question No. 50
If V0 is the critical velocity of a channel, its silt transporting power, according to Kennedy, is proportional to…
- V01/2
- V03/2
- V05/2
- V07/2
Answer:- C
PPSC Past Papers Of Sub-Engineer
Syllabus for one paper MCQs type written test of 90 minutes duration:-
* Design of Hydraulic Structure, Barrage, Fall, Canal, Head Regulator Preliminary MCQs
* Design of River Training Work, Spur, Embankments, Apron, Pitch, etc MCQs
* Design of roof slab MCQs
* Design and working of various types of outlets MCQs
* Draw off/ capacity statements MCQs
* Discharge measurements of canal MCQs
* Canal Design MCQs
* Lining of Canal MCQs