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Civil Engineering Sample Questions 2002

Civil Engineering Sample Questions 2002

Civil Engineering Sample Questions 2002

SECTION A (75 Marks)

CE-l. This question consists of TWENTY FIVE sub-questions (1.1 - 1.25) of ONE mark each. For each of these sub-questions four possible answers (A, B, C and D) are given, out of which ONLY ONE is correct. Answer each sub question by darkening the appropriate bubble on the OBJECTIVE RESPONSE SHEET (ORS) using a soft HB pencil. Do not use the ORS for any rough work. . You may use the Answer Book for any rough work, if needed.

1.1 Eigen values of the following matrix are: (A) 3 and-5 (B) -3 and 5

(C) -3 and-5 (D) 3 and 5

1.2 The value of the following definite integral is: (A) -2 In2

(B) 2

(C) 0

• The following function has a local minima at which value of x: (a) (b) (c) (d)  • Member AB carries shear force and bending moment
• Member BC carries axial load and shear force.

Which of the following is true:

• Statement I is true but II is false
• Statement I is false but II is true
• Both statements I and II are true
• Both statements I and II are false

1.5 Read the following two statements

I. Maximum strain in concrete at the outermost compression fibre is taken to be 0.0035 in bending.

II. The maximum compressive strain in concrete in axial compression is taken as 0.002.

Keeping the provisions of IS 456-2000 on limit state design in mind, which of the following is true:

• Statement I is true but II is false
• Statement I is false but II is true
• Both statements I and II are true
• Both statements I and II are false

1.6 As per the provisions of IS 456-2000, the (short term) modulus of elasticity of M25 grade concrete (in N/mm 2) can be assumed to be,

(a) 25000 (B) 28500 (C) 30000 (D) 36000

1.7 The shear modulus (G), modulus of elasticity (E) and the Poisson's ratio (v) of a material are related as,

• G=E/ [2(1+v)]
• E=G / [2(1+v)]
• G=E / [2(1-v)] ­
• G=E / [2(v-1)]
• When designing steel structures, one must ensure that local buckling in webs does not take place. This check may not be very critical when using rolled steel sections because,

• Quality control at the time of manufacture of rolled sections is very good
• Web depths available are small
• Web stiffeners are in-built in rolled sections
• Depth to thickness ratios (of the web) are appropriately adjusted

1.9 An ISMB 500 is used as a beam in a multi-storey construction. From the viewpoint of structural design, it can be considered to be 'laterally restrained' when,

• the tension flange is 'laterally restrained'
• the compression flange is 'laterally restrained'
• the web is adequately stiffened
• the conditions in (A) and (C) are met.

1.10 Data from a sieve analysis conducted on a given sample of soil showed that 67% of the particles passed through 75 micron IS sieve. The liquid limit and plastic limit of the finer fraction was found to be 45 and 33 percents respectively. The group symbol of the given soil as per IS:1498-1970 is:

• SC (B) MI (C) CH (D) MH

1.11 The void ratios at the densest, loosest and the natural states of a sand deposit are 0.2, 0.6 and 0.4, respectively. The relative density of the deposit is:

• 100%
• 75%
• 50%
• 25%

1.12 The following data were obtained from a liquid limit test conducted on a soil sample.

 Number of blows 17 22 25 28 34 Water content (%) 63.8 63.1 61.9 60.6 60.5

The liquid limit of the soil is:

(A) 63.1%

(B) 62.8%

(C) 61.9%

(D) 60.6%

1.13 The specific gravity and insitu void ratio of a soil deposit are 2.71 and 0.85 respectively. The value of the critical hydraulic gradient is:

• 0.82
• 0.85
• 0.95
• 0.92

1.14 The observed value of the standard penetration number (N) at 10m depth of a silty

sand deposit is 13. The unit weight of the soil is 16 kN/in 3.The N value after correcting for the presence of fines will be:

(A) 12

(B) 13

(C) 14

(D) 15

1.15 The force 'F' required at equilibrium on the semi-cylindrical gate shown below is: • 9.81 kN
• 0.0 kN
• 19.62 kN
• none of the above

1.16 Velocity distribution in a boundary layer flow over a plate is given by

(u/u m) = 1.5 h - 0.5 h 3 J

where, h = y/ d ; y is the distance measured normal to the plate; d is the boundary layer thickness; and U m is the maximum velocity at y = d . If the shear stress t , acting on the plate is given by

t =K( m u m)/ d

where, m is the dynamic viscosity of the fluid, K takes the value of:

• 0
• 1

(C) 1.5

(0) none of the above

l.l7 A 6-hour Unit Hydrograph (UH) of a catchment is triangular in shape with a total time base of 36 hours and a peak discharge of 18 m 3 /s. The area of the catchment (in sq. km) is:

• 233
• 117
• 1.2
• sufficient information not available

1.18 When there is an increase in the atmospheric pressure, the water level in a well penetrating in a confined aquifer:

• increases
• decreases
• may increase or decrease depending on the nature of the-1fquifer
• does not undergo any change

1.19 In a domestic wastewater sample, COD and BOD were measured. Generally which of the following statement is true for their relative magnitude?

• COD = BOD
• COD > BOD
• COD <BOD
• Nothing can be said

1.20 In disinfection, which of the following forms of chlorine is most effective in killing the pathogenic bacteria?

• Cr
• OCI
• NH 2CI
• HOCI

1.21 A Trickling filter is designed to remove:

• Settleable Solids
• Colloidal Solids
• Dissolved Organic Matter
• None of the above

1.22 In natural water, hardness is mainly caused by:

• Ca ++ and Mn ++
• Ca ++ and Fe ++
• Na + and K +
• Ca ++ and Mg ++

1.23 Bitumen is derived from:

• destructive distillation of coal tar
• destructive distillation of petroleum
• fractional distillation of petroleum
• naturally occurring ores

1.24 Dowel bars in concrete pavement are placed

• along the direction of traffic
• perpendicular to the direction of traffic
• along 45° to the direction of traffic
• can be placed along any direction

1.25 Stopping sight distance and frictional co-efficients are

• directly proportional to each other
• inversely proportional to each other
• unrelated
• either directly or inversely proportional to each other depending on the nature of pavement

CE-2. This question consists of TWENTY FIVE sub-questions (2.1 - 2.25) of TWO marks each. For each of these sub-questions four possible answers (A, B, C and D) are given, out of which ONLY ONE is correct. Answer each sub question by darkening the appropriate bubble on the OBJECTIVE RESPONSE SHEET (ORS) using a soft HB pencil. Do not use the ORS for any rough work. You may use the Answer Book for any rough work, if needed.

2.1 The value of the following improper integral is • ¼
• 0
• 1

• The directional derivative of the following function at (1,2) in the direction of (4i+3j) is: • 4/5
• 4
• 2/5
• 1

2.3 The Laplace Transform of the following function is (A) for all s>0

(B) for all s < p

(c) for all s>0

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25 Jun, 2019, 17:51:46 PM