Exam Details
| Subject | civil engineering | |
| Paper | paper 2 | |
| Exam / Course | indian forest service | |
| Department | ||
| Organization | union public service commission | |
| Position | ||
| Exam Date | 2015 | |
| City, State | central government, |
Question Paper
I.F.S. EXAJ!-2015
CIVIL ENGINEERING
Paper-II
In..e Allowed Three Hours I
Maximum Marks 200
QUESTION PAPER SPECfflC INSTRUCTIONS
Please read each of the following instructions carefully before attempting questions There are EIGHT questions in all, out of which FIVE are to be attempted. Question Nos. I and 5 are compulsory. Out of the remaining SIX questions, THREE are to he attempted
selecting at least ONE question from each of the two Sections A and B. Attempts of questions shall be counted in sequential order. Unless struck off, attempt of a question shall
be counted even if attempted partly. Any page or portion of the page left blank in the Question-cum-Answer Booklet must be clearly struck off. All questions carry equal marks. The number of marks carried by a question/part ia indicated against it. Answers must be written in ENGLISH only. Unless ..therwise mentioned, symbols and notations have their usual standard meanings. Assume suitable data, if necessary and indicate the same clearly. Neat sketches may be drawn, wherever required.
SECTION-A
Q.
What are different constituents of brick earth How do they effect the quality of
Name five types of estimates in practice to anticipate the cost of a construction
project. Explain them. 5
Q. What is seasoning of timber? What are different methods of seasoning 3
1 Differentiate Flash set and False set. 2
A construction project has to borrow the following amounts at interest rate in
three years
I Year -Rs. 8,00,000
II Year -Rs. 6,00,000
Ill Year -Rs. 2,00,000
If loan amount is to be paid back at the end of 2 years after completion of the project
in lumpsum, find the amount.
Q.
Briefly explain what do you understand by the term 'Photogrammetry'? Write three
important points comparing characteristics of aerial photographs with maps.
Write five important advantages of channelizing an intersection for mix traffic conditions
prevailing in India. 5
Q. Briefly explain why rail gauge are disturbed due to creep of rails. Also briefly
explain why undue stresses are induced in the fish plates due to rail creep. 5
Briefly explain why too steep cross slope is not desirable in highway pavement.
5
Q. What is Fibre Reinforced Concrete What are the applications of FRC Mention
the classification of fibres based on the geometry. 5
With the help of a neat sketch explain Line organisation. Mention the merits and
demerits. 5
Q.
List out different methods of damp prevention in building. 3
Define Fire Load. Give the classification of fire load as per IS: 1640. 3
What are different time estimates of an activity and explain how these time estimates
help in determining the expected time of activity. 4
Q.
The reduced level (R.L.) of a room floor is 45.450 m. The observed staff reading on a
staff held at a point P on the floor was 2.35'0 m. The staff was found to be 0.10 m off
the vertical through its bottom. Determine the correct staff reading.
Further, the reading on a staff held vertically inverted with the bottom touching the
bottom of the roof slab of the room was 1.450 m. Also determine the height of the roof
slab above the floor.
10
Q.
A train is to be diverted from a railway track A to the right hand side railway track
B. Draw a typical sketch of a tum out for this arrangement and show the following
on sketch
Facing direction Throw of switch Check rails Outer curve lead rail
Heel of switch.
5
What is the significance of low-cost roads in India Briefly explain how stabilization
technique can be utilized to construct low cost roads. ·
2
Q.
Nine activities of a project are given in the table below, along with activity duration.
Find the critical path. Also find total float and free float of all activities
Activity 1-2 1-3 2-4 2-S 3-4 3-6 4-7 5-7 677
Duration 10
(days) 12 11 22 18 10 15 11 13 10
Q.
·. What is curing of concrete Explain the advantages of Autoclaving. s
What is bleeding of concrete How can it be avoided
5
Q. A highway is designed for a design speed of 80 kmph. However, it is observed that a
driver is travelling at a speed of 120 krnph on this highway at a descending gradient of
2.5%. Determine the increase in the stopping sight distance required for this driver.
Assume reaction time of driver as 2.5 seconds and coefficient of friction fas 0.35.
If required, other data may be assumed as per IRC recommendations. 10
Q. Differentiate between spot speed and average speed of vehicles. A spot speed study was
conducted at the mid point of Section AB of a 2 lane road. The length of Section AB
I
I measured is 0.9 m. The spot speeds for vehicles 5 and 6 measured with radar
speedometer were 42, 38, 52, 39, 44 and 45 kmph respectively. Determine the time-mean
speed and space-mean speed at this Section AB. Assume all vehicles were travelling at
constant speed over this roadway Section AB. 10
Q.
Define workability. What is the effect of the following on the workability of concrete
Aggregate size, Cement content, Shape of aggregate, Gra.ding of aggregate 5
I
What is efflorescence of bricks Classify the bricks based on the strength of brick.
5
Q.
What are the main compounds of cement Mention their relative behaviour on
hydration and rate of strength gain. 5
Differentiate Rubble Masonry and Ashlar Masonry. Mention further classification of
Rubble masonry. 5
Q. Write the four important points highlighting the importance of sub-surface drainage of
roads. Also write the special problems in drainage of surface water in following
Rural highways Urban roads Hill roads.
4+6=10
Q. Determine the steepest gradient for a 3° curve railway track for moving a 18 wagons
(weight of 1 wagon 22 tonnes) train at a speed of 60 krnph. Use the following data
Weight of locomotive with tender 150 tonnes
Number of pairs of driving wheel of locomotive 4
Axle load of the driving wheel 28.45 tonnes
Coefficient of friction 0.166.
Also assume that resistance due to friction, wave action etc. is 0.0025 per tonne weight
of train. Curve resistance may be considered as 0.0004 per degree curve per tonne weight
of train. Resistance due to speed may be assumed as 0.0000015 V2 per tonne weight of
train. V is the speed of train in krnph. 10
SECTION-. B
Q. Draw a schematic diagram of Hydrologic cycle and explain its various components.
10
Q. Draw a typical Gravity Dam and indicate various forces acting on the Dam. 10
Q. Explain the significance of the following in context of water quality
Nitrate
Hardness
Alkalinity
Iron
Fluoride. 10
Q. With respect to the settling of the suspended solids in water and wastewater treatment,
what is a type-1 suspension and a type-2 suspension and what are their settling characteristics?
10
Q. An infiltration test on a ring with 35 cm diameter shows the following result
Time
0 2 5 10 20 30 60 90 150 210
Cumulative
volume of
0 278 658 1173 1924 2500 3345 3875 5315
water added 4595
3
cm
Detennine
Minimum infiltration capacity
Average infiltration for first 1 o· min.
Average infiltration for first 30 min.
10
Define a spillway. Draw a typical sketch of ogee spillway. Give the equation for crest
profile of ogee spillway as recommended by USBR. Give the discharge equation for an
ogee spillway. 10
Q. Explain the mechanisms through which coagulation of colloidal particles in water is
accomplished by dissolution of coagulant in water. 10
Q. A city must treat about 20000 m3/d of water. A column analysis on flocculating suspension
indicates that an overflow rate of 20 mid will produce satisfactory removal at a depth of
3.5 providing 4 tanks for flexibility in operations, detennine the size of the settling
tanks. Also calculate retention time, horizontal flow velocity and weir overflow rate
considering the weir to occupy the width of the tank. 1 0
Q. List the assumptions made in the derivation of an equation for steady radial flow into
wells.
A well with a radius of 0.5 m completely penetrates a confined aquifer of thickness
50 m. The well is pomped so that water level in the well remains constant at 40 m above
bottc>m. Detennine the Steady State Discharge. Assume K 30 m/day, R 500 m. 10
Q. Explain the meaning of stable channel in Alluvium.
Explain step by step procedure of designing a stable channel using Kennedy's Theory.
What are the limitations of Kennedy's Theory 10
Q. For a wastewater biological treatment system, the growth phase of microorganisms is
very important. Draw a biomass growth curve and show and describe various phases
on it. 10
· Q.
A residential area of about 40 ha contains 400 single family residences and 8 ha with
apartments housing 400 people. Assuming five residents per single-family unit and
per capita waste generation at 1.0 kg/day, detennine the number of trips on each
collection day, with two curb-side pickups per week, one packer truck to 5 tonne
capacity) needs to make to serve this area. 5
Detennine the dry mass of solids in a 1 f. volume of sludge sample containing 1
solids. If all the solids are allowed to settle and the liquid is decanted until the total
volume is 500 mf what will be the new solids concentration 5
Q. A small water shed consists of 1.5 km2 of Cultivated Area 0.20). 2.5 km2 under
forest 0.10) and 1.0 km2 under grass cover 0.35). There is a fall of 22 min a
water course of length 1.8 km. The intensity frequency duration relation for the area is
given by
80
T0
·
2
r
13) "46
where I is in ems/hr, Tr in years and t in min.
Estimate the Peak rate of run off for a 25 year frequency. 10
Q. A canal is to be designed to suit the following irrigation requirement
Crop Area Period Duty (ha/cumec)
Wheat 5000 Dec.-Mar. 1800
Rice 6000 June-Sep. 800
Sugarcane 4000 June-Mar. 1000
Estimate the design discharge of the canal (Assume Canal losses as 20% and Field losses
to be 10
I. In context of air pollution explain the following
Primary pollutants
Secondary pollutants
Primary standards
Secondary standards
Criteria pollutants. 5
II.
For a population of 1,00,000 with per capita waste generation of 1.0 kg/day, estimate
the annual area requirements (excluding the buffer zone) for a normally compacted
landfill with density of 450 kg/m3 and having a refuse depth of 4 m excluding the
cover material. 5
I
1
Q. Determine the capacity of a storage reservoir required to maintain a constant water supply
(draft) of 2 x 106 m3/month, given the following monthly mean run-off values. Use only
numerical method
Month Run-off QR 106 m3
1 9.0
2 10.8
3 4.2
4 2.8
5 1.2
6 1.1
7 0.9
8 0.5
9 0.6
10 0.4
11
12 0.9
13 1.1
14 2.0
15 5.5
16 10.5
17 3.5
18
CIVIL ENGINEERING
Paper-II
In..e Allowed Three Hours I
Maximum Marks 200
QUESTION PAPER SPECfflC INSTRUCTIONS
Please read each of the following instructions carefully before attempting questions There are EIGHT questions in all, out of which FIVE are to be attempted. Question Nos. I and 5 are compulsory. Out of the remaining SIX questions, THREE are to he attempted
selecting at least ONE question from each of the two Sections A and B. Attempts of questions shall be counted in sequential order. Unless struck off, attempt of a question shall
be counted even if attempted partly. Any page or portion of the page left blank in the Question-cum-Answer Booklet must be clearly struck off. All questions carry equal marks. The number of marks carried by a question/part ia indicated against it. Answers must be written in ENGLISH only. Unless ..therwise mentioned, symbols and notations have their usual standard meanings. Assume suitable data, if necessary and indicate the same clearly. Neat sketches may be drawn, wherever required.
SECTION-A
Q.
What are different constituents of brick earth How do they effect the quality of
Name five types of estimates in practice to anticipate the cost of a construction
project. Explain them. 5
Q. What is seasoning of timber? What are different methods of seasoning 3
1 Differentiate Flash set and False set. 2
A construction project has to borrow the following amounts at interest rate in
three years
I Year -Rs. 8,00,000
II Year -Rs. 6,00,000
Ill Year -Rs. 2,00,000
If loan amount is to be paid back at the end of 2 years after completion of the project
in lumpsum, find the amount.
Q.
Briefly explain what do you understand by the term 'Photogrammetry'? Write three
important points comparing characteristics of aerial photographs with maps.
Write five important advantages of channelizing an intersection for mix traffic conditions
prevailing in India. 5
Q. Briefly explain why rail gauge are disturbed due to creep of rails. Also briefly
explain why undue stresses are induced in the fish plates due to rail creep. 5
Briefly explain why too steep cross slope is not desirable in highway pavement.
5
Q. What is Fibre Reinforced Concrete What are the applications of FRC Mention
the classification of fibres based on the geometry. 5
With the help of a neat sketch explain Line organisation. Mention the merits and
demerits. 5
Q.
List out different methods of damp prevention in building. 3
Define Fire Load. Give the classification of fire load as per IS: 1640. 3
What are different time estimates of an activity and explain how these time estimates
help in determining the expected time of activity. 4
Q.
The reduced level (R.L.) of a room floor is 45.450 m. The observed staff reading on a
staff held at a point P on the floor was 2.35'0 m. The staff was found to be 0.10 m off
the vertical through its bottom. Determine the correct staff reading.
Further, the reading on a staff held vertically inverted with the bottom touching the
bottom of the roof slab of the room was 1.450 m. Also determine the height of the roof
slab above the floor.
10
Q.
A train is to be diverted from a railway track A to the right hand side railway track
B. Draw a typical sketch of a tum out for this arrangement and show the following
on sketch
Facing direction Throw of switch Check rails Outer curve lead rail
Heel of switch.
5
What is the significance of low-cost roads in India Briefly explain how stabilization
technique can be utilized to construct low cost roads. ·
2
Q.
Nine activities of a project are given in the table below, along with activity duration.
Find the critical path. Also find total float and free float of all activities
Activity 1-2 1-3 2-4 2-S 3-4 3-6 4-7 5-7 677
Duration 10
(days) 12 11 22 18 10 15 11 13 10
Q.
·. What is curing of concrete Explain the advantages of Autoclaving. s
What is bleeding of concrete How can it be avoided
5
Q. A highway is designed for a design speed of 80 kmph. However, it is observed that a
driver is travelling at a speed of 120 krnph on this highway at a descending gradient of
2.5%. Determine the increase in the stopping sight distance required for this driver.
Assume reaction time of driver as 2.5 seconds and coefficient of friction fas 0.35.
If required, other data may be assumed as per IRC recommendations. 10
Q. Differentiate between spot speed and average speed of vehicles. A spot speed study was
conducted at the mid point of Section AB of a 2 lane road. The length of Section AB
I
I measured is 0.9 m. The spot speeds for vehicles 5 and 6 measured with radar
speedometer were 42, 38, 52, 39, 44 and 45 kmph respectively. Determine the time-mean
speed and space-mean speed at this Section AB. Assume all vehicles were travelling at
constant speed over this roadway Section AB. 10
Q.
Define workability. What is the effect of the following on the workability of concrete
Aggregate size, Cement content, Shape of aggregate, Gra.ding of aggregate 5
I
What is efflorescence of bricks Classify the bricks based on the strength of brick.
5
Q.
What are the main compounds of cement Mention their relative behaviour on
hydration and rate of strength gain. 5
Differentiate Rubble Masonry and Ashlar Masonry. Mention further classification of
Rubble masonry. 5
Q. Write the four important points highlighting the importance of sub-surface drainage of
roads. Also write the special problems in drainage of surface water in following
Rural highways Urban roads Hill roads.
4+6=10
Q. Determine the steepest gradient for a 3° curve railway track for moving a 18 wagons
(weight of 1 wagon 22 tonnes) train at a speed of 60 krnph. Use the following data
Weight of locomotive with tender 150 tonnes
Number of pairs of driving wheel of locomotive 4
Axle load of the driving wheel 28.45 tonnes
Coefficient of friction 0.166.
Also assume that resistance due to friction, wave action etc. is 0.0025 per tonne weight
of train. Curve resistance may be considered as 0.0004 per degree curve per tonne weight
of train. Resistance due to speed may be assumed as 0.0000015 V2 per tonne weight of
train. V is the speed of train in krnph. 10
SECTION-. B
Q. Draw a schematic diagram of Hydrologic cycle and explain its various components.
10
Q. Draw a typical Gravity Dam and indicate various forces acting on the Dam. 10
Q. Explain the significance of the following in context of water quality
Nitrate
Hardness
Alkalinity
Iron
Fluoride. 10
Q. With respect to the settling of the suspended solids in water and wastewater treatment,
what is a type-1 suspension and a type-2 suspension and what are their settling characteristics?
10
Q. An infiltration test on a ring with 35 cm diameter shows the following result
Time
0 2 5 10 20 30 60 90 150 210
Cumulative
volume of
0 278 658 1173 1924 2500 3345 3875 5315
water added 4595
3
cm
Detennine
Minimum infiltration capacity
Average infiltration for first 1 o· min.
Average infiltration for first 30 min.
10
Define a spillway. Draw a typical sketch of ogee spillway. Give the equation for crest
profile of ogee spillway as recommended by USBR. Give the discharge equation for an
ogee spillway. 10
Q. Explain the mechanisms through which coagulation of colloidal particles in water is
accomplished by dissolution of coagulant in water. 10
Q. A city must treat about 20000 m3/d of water. A column analysis on flocculating suspension
indicates that an overflow rate of 20 mid will produce satisfactory removal at a depth of
3.5 providing 4 tanks for flexibility in operations, detennine the size of the settling
tanks. Also calculate retention time, horizontal flow velocity and weir overflow rate
considering the weir to occupy the width of the tank. 1 0
Q. List the assumptions made in the derivation of an equation for steady radial flow into
wells.
A well with a radius of 0.5 m completely penetrates a confined aquifer of thickness
50 m. The well is pomped so that water level in the well remains constant at 40 m above
bottc>m. Detennine the Steady State Discharge. Assume K 30 m/day, R 500 m. 10
Q. Explain the meaning of stable channel in Alluvium.
Explain step by step procedure of designing a stable channel using Kennedy's Theory.
What are the limitations of Kennedy's Theory 10
Q. For a wastewater biological treatment system, the growth phase of microorganisms is
very important. Draw a biomass growth curve and show and describe various phases
on it. 10
· Q.
A residential area of about 40 ha contains 400 single family residences and 8 ha with
apartments housing 400 people. Assuming five residents per single-family unit and
per capita waste generation at 1.0 kg/day, detennine the number of trips on each
collection day, with two curb-side pickups per week, one packer truck to 5 tonne
capacity) needs to make to serve this area. 5
Detennine the dry mass of solids in a 1 f. volume of sludge sample containing 1
solids. If all the solids are allowed to settle and the liquid is decanted until the total
volume is 500 mf what will be the new solids concentration 5
Q. A small water shed consists of 1.5 km2 of Cultivated Area 0.20). 2.5 km2 under
forest 0.10) and 1.0 km2 under grass cover 0.35). There is a fall of 22 min a
water course of length 1.8 km. The intensity frequency duration relation for the area is
given by
80
T0
·
2
r
13) "46
where I is in ems/hr, Tr in years and t in min.
Estimate the Peak rate of run off for a 25 year frequency. 10
Q. A canal is to be designed to suit the following irrigation requirement
Crop Area Period Duty (ha/cumec)
Wheat 5000 Dec.-Mar. 1800
Rice 6000 June-Sep. 800
Sugarcane 4000 June-Mar. 1000
Estimate the design discharge of the canal (Assume Canal losses as 20% and Field losses
to be 10
I. In context of air pollution explain the following
Primary pollutants
Secondary pollutants
Primary standards
Secondary standards
Criteria pollutants. 5
II.
For a population of 1,00,000 with per capita waste generation of 1.0 kg/day, estimate
the annual area requirements (excluding the buffer zone) for a normally compacted
landfill with density of 450 kg/m3 and having a refuse depth of 4 m excluding the
cover material. 5
I
1
Q. Determine the capacity of a storage reservoir required to maintain a constant water supply
(draft) of 2 x 106 m3/month, given the following monthly mean run-off values. Use only
numerical method
Month Run-off QR 106 m3
1 9.0
2 10.8
3 4.2
4 2.8
5 1.2
6 1.1
7 0.9
8 0.5
9 0.6
10 0.4
11
12 0.9
13 1.1
14 2.0
15 5.5
16 10.5
17 3.5
18