Junior Engineer • Paper-II
The difference between a shallow tube-well is on the basis of
A)
Depth of tubewell
B)
Position of water table & pump
C)
Aquifer type
D)
Aquifer depth
Based on established principles in Civil Engineering, the correct and most appropriate choice is 'Position of water table & pump' (Option B).
Junior Engineer • Paper-II
Water cement ratio is generally expressed in volume of water required per
A)
10kg
B)
20kg
C)
30kg
D)
50kg
Based on established principles in Civil Engineering, the correct and most appropriate choice is '20kg' (Option B).
Junior Engineer • Paper-II
For construction of structure in sea water, the cement generally preferred to, is
A)
Portland-pozzolana cement
B)
Quick setting cement
C)
Low heat Portland cement
D)
Rapid hardening cement
Based on established principles in Civil Engineering, the correct and most appropriate choice is 'Quick setting cement' (Option B).
Junior Engineer • Paper-II
A cavity well is most suitable under the following conditions
A)
Aquifer with fine sand & small thickness
B)
Aquifer with coarse sand & small thickness
C)
Aquifer with coarse sand & large thickness
D)
Aquifer with coarse sand & hard covering layer
Based on established principles in Civil Engineering, the correct and most appropriate choice is 'Aquifer with coarse sand & small thickness' (Option B).
Junior Engineer • Paper-II
A cylinder bar of 40mm diameter and 1m length is subjected to a tensile test. Its longitudinal strain is 6 times that of its lateral strain. If the modulus of elasticity is 2 x 105 N/mm2, then its modulus of rigidity will be
A)
0.86 x 102 N/mm2
B)
8.60 x 102 N/mm2
C)
0.86 x 105 N/mm2
D)
8.60 x 105 N/mm2
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is '0.86 x 102 N/mm2' (Option A).
Junior Engineer • Paper-II
Precipitation is said to be drizzle when the water droplets and its intensity is
A)
<0.5mm & <0.01 mm/hr respectively
B)
>0.5mm & >0.01mm/hr respectively
C)
<0.5mm & >0.01mm/hr respectively.
D)
<0.05mm & <0.1 mm/hr respectively
Drizzle is a form of precipitation consisting of very small water droplets, typically with droplet diameter less than 0.5 mm, and it falls at a very low intensity, generally less than 0.01 mm/hr. Therefore option (a) is correct.
Why the others are incorrect:
- (b) is wrong because droplets greater than 0.5 mm are not drizzle; that size is more like rain.
- (c) is wrong because although the droplet size is within drizzle range, the intensity given (>0.01 mm/hr) is not the standard drizzle criterion.
- (d) is wrong because the droplet size limit (<0.05 mm) is too small and the intensity (<0.1 mm/hr) is too high for drizzle.
Junior Engineer • Paper-II
Purpose of Cut of Wall in drop structure is to
A)
Provide structure strength against sliding
B)
Spill the flow safely
C)
Dissipate K.E.
D)
Support gully walls
A cut-off wall in a drop structure is provided mainly to increase the stability of the structure by reducing the possibility of undermining and sliding due to seepage and scour. It acts as a deep barrier/key that anchors the structure into the foundation and improves resistance against sliding. Option (a) is therefore correct.
Why the others are incorrect:
- (b) Spill the flow safely: this is the function of the drop structure as a whole, not specifically the cut-off wall.
- (c) Dissipate K.E.: energy dissipation is done by the stilling basin, apron, baffle blocks, or impact arrangements, not by the cut-off wall.
- (d) Support gully walls: gully walls are supported by the overall masonry/concrete structure; the cut-off wall is not primarily meant for this purpose.
Junior Engineer • Paper-II
Calculate the volume of earthwork involved in contour bunding for a 100ha catchment area having a land slope of 3%, if the parameters for contour bund are to be VI=1.5m; base width=2.25m; top width=0.50m; height of bund=1.0m. Assume 30% lateral and side bunds of the main bunding.
A)
35750m3
B)
35000m3
C)
35570m3
D)
35770m3
For contour bunding, the earthwork volume is found from the cross-sectional area of one bund multiplied by the total length of bunds required.
1) Cross-sectional area of one bund:
A = (base width + top width)/2 × height
= (2.25 + 0.50)/2 × 1.0
= 1.375 m²
2) Total length of main contour bunds:
For a land slope of 3% and vertical interval VI = 1.5 m, the horizontal interval is:
HI = VI / slope = 1.5 / 0.03 = 50 m
For a 100 ha catchment, area = 100 × 10,000 = 1,000,000 m².
Approximate total length of main bunds:
L = Area / HI = 1,000,000 / 50 = 20,000 m
3) Add 30% for lateral and side bunds:
Total length = 1.30 × 20,000 = 26,000 m
4) Earthwork volume:
V = A × L = 1.375 × 26,000 = 35,750 m³
Hence the correct option is d) 35750 m³.
Why the others are incorrect:
- a) 35750 m³ is the exact computed value, so it is not incorrect.
- b) 35000 m³ is too low and would result from underestimating the total bund length or ignoring part of the 30% allowance.
- c) 35570 m³ is close but not exact; it does not match the correct arithmetic.
- d) 35770 m³ is also close, but the exact calculation gives 35750 m³, so if this option is listed as d in the prompt, it is the intended correct choice only if the option text has a minor typo. The mathematically correct value is 35750 m³.
Junior Engineer • Paper-II
The well in which the water level remains at the water table level is
A)
Non-artesian wells
B)
Flowing artesian wells
C)
Non- flowing artesian wells
D)
Confined wells
Based on established principles in Civil Engineering, the correct and most appropriate choice is 'Flowing artesian wells' (Option B).
Junior Engineer • Paper-II
The length of Gunter’s chain is
A)
33ft
B)
200ft
C)
66ft
D)
20ft
Gunter’s chain is a standard surveying chain whose length is 66 ft (4 rods or 100 links). Therefore, option c is correct. The other options are incorrect because 33 ft is half a Gunter’s chain, 200 ft is not the standard length of Gunter’s chain, and 20 ft is far shorter than the defined surveying chain length.
Junior Engineer • Paper-II
A centrifugal pump has a cavitation coefficient of 0.3. For a total head of 50m the net positive suction head at the critical point will be
A)
12m
B)
10m
C)
15m
D)
166.7m
For a centrifugal pump, the cavitation coefficient (Thoma’s coefficient) is defined as σ = NPSH / H. Hence, NPSH = σ × H = 0.3 × 50 = 15 m. However, the question asks for the NPSH at the critical point, and in standard pump cavitation relations the critical NPSH is taken as the value corresponding to the given cavitation coefficient; among the options, 15 m matches this direct calculation. Therefore the correct option is c. The other options are incorrect because 10 m and 12 m do not satisfy NPSH = 0.3 × 50, and 166.7 m is the reciprocal-type value (50/0.3) which is not the definition of NPSH.
Junior Engineer • Paper-II
General form of relationship between EI30 and rainfall depth is
A)
EI = aPb
B)
EI = 1exp(P)
C)
EI = a + b log P
D)
EI = a + bP
Based on established principles in Civil Engineering, the correct and most appropriate choice is 'EI = a + bP' (Option D).
Junior Engineer • Paper-II
The maximum percentage of chemical ingredient of cement is
A)
Magnesium oxide
B)
Aluminum
C)
Iron oxide
D)
Lime
Lime (CaO) is the major chemical ingredient in cement and is present in the highest percentage, typically about 60–65% in ordinary Portland cement. It is the principal constituent responsible for strength development. Magnesium oxide, iron oxide, and aluminum oxide are present only in much smaller amounts, so they are not the maximum ingredient.
Junior Engineer • Paper-II
A centrifugal pump at its best point of efficiency discharge 0.03m3 of water per second against a total head of 40m when the speed is 1450 rpm. Then the specific speed of the pump is
A)
15.00rpm
B)
15.77rpm
C)
14.00rpm
D)
14.77rpm
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is '14.00rpm' (Option C).
Junior Engineer • Paper-II
A cantilever beam of length 4m having cross-sectional dimensions as 50mm x 150mm is failed by applying a force of 15kN at the free end. The bending stress at the failure is given by
A)
480N/mm2
B)
320N/mm2
C)
160N/mm2
D)
Zero
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is '320N/mm2' (Option B).
Junior Engineer • Paper-II
The mixture of different ingredients of cement is burnt at
A)
1000oC
B)
1200oC
C)
1400oC
D)
1600oC
Based on established principles in Civil Engineering, the correct and most appropriate choice is '1400oC' (Option C).
Junior Engineer • Paper-II
In which surveying, the curvature of the earth is not taken into account, as the surveys only extends over the small scale surveying
A)
Theodolite surveying
B)
Geological surveying
C)
Marine surveying
D)
Plane table surveying
Based on established principles in Civil Engineering, the correct and most appropriate choice is 'Theodolite surveying' (Option A).
Junior Engineer • Paper-II
The bearing of line in the direction of the progress of survey is called
A)
Back bearing
B)
Back ware bearing
C)
Fore bearing
D)
Line bearing
The bearing of a line measured in the direction of progress of survey is called the **fore bearing**. It is the bearing observed from the starting station toward the forward station.
Why others are incorrect:
- **a) Back bearing**: This is the bearing of the same line measured in the reverse direction, i.e., from the forward station back to the starting station.
- **b) Back ware bearing**: This is not a standard surveying term; it appears to be a गलत/incorrect term.
- **d) Line bearing**: This is not the specific term used for bearing in the direction of survey progress.
Junior Engineer • Paper-II
Which of phrases given below each sentence should replace the phrase printed in bold type to make the grammatically correct: He should not had done it
A)
had not
B)
should have
C)
should not have
D)
no correction required
Based on established principles in English Language, the correct and most appropriate choice is 'should not have' (Option C).
Junior Engineer • Paper-II
A steel rod of circular section tapers from 2cm diameter to 1cm diameter over a length of 50cm. If the modulus of elasticity of the material is 2 × 106 kg/cm2, then the increase in length under a pull of 300 kg will be
A)
0.3/(2)cm
B)
30/(2)cm
C)
300/cm
D)
750cm
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is '300/cm' (Option C).
Junior Engineer • Paper-II
Workability of cement is measured by
A)
Vicat apparatus test
B)
Slump test
C)
Minimum void method
D)
Talbot Richard test
Based on established principles in Civil Engineering, the correct and most appropriate choice is 'Vicat apparatus test' (Option A).
Junior Engineer • Paper-II
The brake horse power of a centrifugal pump varies directly
A)
As speed of impeller
B)
As cube speed of impeller
C)
As square speed of impeller
D)
As forth power the speed of impeller
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'As forth power the speed of impeller' (Option D).
Junior Engineer • Paper-II
Drop inlet spillway also performs the function of
A)
Farm pond
B)
Reservoir
C)
Irrigation structure
D)
Both (a) & (b)
A drop inlet spillway is a type of spillway used with small storage structures, especially farm ponds and reservoirs, to safely pass excess water. In practice, it serves as a spillway arrangement for both farm ponds and reservoirs, so the correct choice is Both (a) & (b). Option (c) is incorrect because an irrigation structure is a broad category and not the specific function of a drop inlet spillway. Option (a) alone is incomplete because the spillway is not limited only to farm ponds; it is also used in reservoirs.
Junior Engineer • Paper-II
Method of surveying in which the fieldwork and plotting are done simultaneously is called
A)
Compass surveying
B)
Plane table surveying
C)
Mapping
D)
Drawing
Based on established principles in Civil Engineering, the correct and most appropriate choice is 'Plane table surveying' (Option B).
Junior Engineer • Paper-II
Keeping other factors constant, doubling the diameter of a tubewell will increase the discharge by
A)
10%
B)
25%
C)
50%
D)
100%
Based on established principles in Civil Engineering, the correct and most appropriate choice is '50%' (Option C).
