GATE Paper 2011 Civil Engineering

The is

Two coins are simultaneously tossed. The probability of two heads simultaneously appearing is

The order and degree of the differential equation

are respectively

Two people weighing W each are sitting on a plank of length L floating on water at L 4 from either end. Neglecting the weight of the plank, the bending moment at the centre of the plank is

For the truss shown in the figure, the force in the member QR is

The major and minor principal stresses at a point are 3MPa and -3MPa respectively. The maximum shear stress at the point is

The number of independent elastic constants for a linear elastic isotropic and homogeneous material is

The effective length of a column of length L fixed against rotation and translation at one end and free at the other end is

As per India standard code of practice for pre stressed concrete (IS:1343-1980) the minimum grades of concrete to be used for post-tensioned and pre-tensioned structural elements are respectively

A solid circular shaft of diameter d and length L is fixed at one end and free at the other end. A torque t is applied at the free end. The shear modulus of the material is G. The angle of twist at three free ends is

In a compaction test, G, w, S and e represent the specific gravity, water content, degree of saturation and void ratio of the soil sample, respectively. If represents the unit weight of water and represents the dry unit weight of the soil, the equation for zero air voids line is

A fine grained soil has liquid limit of 60 and plastic limit of 20. As per the plasticity chart, according to IS classification, the soil is represented by the letter symbols

Quick sand condition occurs when

The e-log p curve shown in the figure is representative of

If represent the total horizontal stress, total vertical stress, effective horizontal stress and effective vertical stress on a soil element, respectively, the coefficient of earth pressure at rest is given by

A mild-sloped channel is followed by a steep-sloped channel. The profiles of gradually varied flow in the channel are

The flow in a rectangular channel is subcritical. If width of the channel is reduced at a certain section, the water surface under no-choke condition will

The correct match of Group-I with Group-II is

A coastal city produces municipal solid waste (MSW) with high moisture content, high organic materials, low calorific value and low inorganic materials. The most effective and sustainable option for MSW management in that city is

According to the Noise Pollution (Regulation and control) Rules, 2000, of the Ministry of Environment and Forests, India, the day time and night time noise level limits in ambient air for residential areas expressed in dB(A) Leg are

An air parcel having temperature moves from ground level to 500m elevation in dry air following the “adiabatic lapse rate”. The resulting temperature of air parcel at 500m elevation will be

Aggregate impact value indicates the following property of aggregates

As per IRC: 67-2001, a traffic sign indicating the Speed Limit on a road should be of

The local mean time at a place located in longitude 40’E when the standard time is 6 hours and 30 minutes and the standard meridian is 30’E is

The solution to the ordinary differential equation is

The inverse of the matrix is

The table below gives values of a function F(x) obtained for values of x at intervals of 0.25.



The value of the integral of the function between the limits 0 to 1 using Simpson’s rule is

The partial differential equation that can be formed from z = ax by ab has the form

A parabolic cable is held between two supports at the same level. They horizontal span between the supports is L. The sag at the mid-span is h. The equation of the parabola is where x is the horizontal coordinate and y is the vertical coordinate with the origin at the centre of the cable. The expression for the total length of the cable is

Given a function

The optimal value of f(x, y)

A double cover butt riveted joint is used to connect two flat plates of 200mm width and 14mm thickness as show in the figure. There are twelve power driven rivets of 20mm diameter at a pitch of 50mm in both directions on either side of the plate. Two cover plates of 10mm thickness are used. The capacity of the joint in tension considering bearing and shear ONLY, with permissible bearing and shear stresses as 300MPa respectively is

Two plates, subjected to direct tension, each of 10mm thickness and having widths of 100mm and 175mm, respectively are to be fillet welded with an overlap of 200mm. Given that the permissible weld stress is 110MPa and the permissible stress in steel is 150MPa, then length of the weld required using the maximum permissible weld size as per IS: 800-1984 is

For the simply supported beam of length L, subjected to a uniformly distributed moment M kN-m per unit length as shown in the figure, the bending moment (in kN-m) at the mid-span of the beam is

A disc of radius r has a hole of radius r/2 cut-out as shown. The centroid of the remaining disc (shaded portion) at a radial distance from the centre “O” is

A three hinged parabolic arch having a span of 20m and a rise of 5m carries a point load of 10kN at quarter span from the left end as shown in the figure. The resultant reaction at the left support and its inclination with the horizontal are respectively

The vertical stress at point due to the point load Q on the ground surface as shown in figure is According to Boussinesq’s equation, the vertical stress at point shown in figure will be

An open ended steel barrel of 1m height and 1m diameter is filled with saturated fine sand having coefficient of permeability of The barrel stands on a saturated bed of gravel. The time required for the water level in the barrel to drop by 0.75m is

The ultimate load capacity of a 10m long concrete pile of square cross section 500mm x 500mm driven into a homogeneous clay layer having undrained cohesion value of 40kPa is 700kN. If the cross section of the pile is reduced to 250mm x 250mm and the length of the pile is increased to 20m, the ultimate load capacity will be

For a rectangular channel section, Group I lists geometrical elements and Group II gives proportions for hydraulically efficient section.



is the follow depth corresponding to hydraulically efficient section. The correct match of Group I with Group II is

The Froude number of flown in a rectangular channel is 0.8. If the depth of flow is 1.5m, the critical depth is

A wall of diameter 20cm fully penetrates a confined aquifer. After a long period of pumping at a rate of 2720litres per minute, the observations of drawdown taken at 10m and 100m distances from the center of the wall are found to be 3m and 0.5m respectively. The transmissivity of the aquifer is

If the of a wastewater sample is 75mg/L and reaction rate constant k (base e) is 0.345 per day, the amount of BOD remaining in the given sample after 10days is

Consider the following statements in the context of geometric design of roads.
I: A simple parabolic curve is an acceptable shape for summit curves.
II: Comfort to passengers is an important consideration in the design of summit curves.
The correct option evaluating the above statements and their relationship is

The design speed for a two-lane road is 80kmph. When a design vehicle with a wheelbase of 6.6m is negotiating a horizontal curve on that road, the off-tracking is measured as 0.096m. The required widening of carriageway of the two-lane road on the curve is approximately

Consider the following statements in the context of cement concrete pavements.
I. Warping stresses in cement concrete pavements are caused by the seasonal variation in temperature.
II. Tie bars are generally provided across transverse joints of cement concrete pavements
The correct option evaluating the above statements is

A bench mark has been established at the soffit of an ornamental arch at the known elevation of 100.0m above sea level. The back sight used to establish height of instrument is an inverted staff reading of 2.105m. A forward sight reading with normally held staff of 1.105m is taken on a recently constructed plinth. The elevation of the plinth is

Directions for next two questions: Ion concentrations obtained for a groundwater sample (having pH=8.1) are given below.



Total hardiness (mg/L as CaCO3) present in the above water sample is

Carbonate hardness (mg/L as CaCO3) present in the above water sample is

Directions for next two questions: The moisture holding capacity of the soil in a 100 hectare farm is 18cm/m. the field is to be irrigated when 50 percent of the available moisture in the root zone is depleted. The irrigation water is to be supplied by a pump working for 10hours a day, and water application efficiency is 75%. Details of crops planned for cultivation are as follows:



The capacity of irrigation system required to irrigate crop X in 36 hectares is

The area of crop Y that can be irrigated when the available capacity of irrigation system is 40 liters / sec is

Directions for next two questions: A doubly reinforced rectangular concrete beam has a width of 300mm and an effective depth of 500mm. the beam is reinforced with of steel in tension and of steel in compression. The effective cover for compression steel is 50mm. Assume that both tension and compression steel yield. The grades of concrete and steel used are M20 and Fe250 respectively. The stress lock parameters (rounded off to first two decimal places) for concrete shall be as per IS 456:200.

The depth of neutral axis is

The moment of resistance of the section is

Directions for next two questions: The unconfined compressive strength of a saturated clay sample is 54kPa.

The value of cohesion for the clay is

If a square footing of size 4m x 4m is resting on the surface of a deposit of the above clay, the ultimate bearing capacity of the footing (as per Terzaghi’s equation) is

Directions for next five questions:
Which of the following options is closest in meaning to the word Circuitous.

The question below consists of a pair of related words followed by four pairs of words. Select the pair that best expresses the relation in the original pair.
Unemployed: Worker

Choose the most appropriate word from the options given below to complete the following sentence:

If we manage to …...................... our natural resources, we would leave a better planet for our children.

Choose the most appropriate word from the options given below to the complete the following sentence:

His rather casual remarks on politics …....................... his lack of seriousness about the subject.

25 persons are in a room. 15 of them play hockey, 17 of them play football and 10 of them play both hockey and football. Then the number of persons playing neither hockey nor football is:

Directions for next five questions:
Hari (H), Gita (G), Irfan (I) and Saira (S) are siblings (i.e. brothers and sisters). All were born on 1st January. The age difference between any two successive siblings (that is born one after another) is less than 3 years. Given the following facts:

i. Hari’s age + Gita’s age > Irfan’s age + Saira’s age
ii. The age difference between Gita and Saira is 1 year. However Gita is not the oldest and Saira is not the youngest.
iii. There are no twins.

In what order were they born (oldest first)?

5 skilled workers can build a wall in 20days: 8 semi-skilled workers can build a wall in 25 days; 10 unskilled workers can build a wall in 30days. If a team has 2 skilled, 6 semi-skilled and 5 unskilled workers, how long will it take to build the wall?

Modern warfare has changed from large scale clashes of armies to suppression of civilian populations. Chemical agents that do their work silently appear to be suited to such warfare; and regretfully, there exist people in military establishments who think that chemical agents are useful tools for their cause.

Which of the following statements best sums up the meaning of the above passage:

Given digits 2, 2, 3, 3, 4, 4, 4, 4 how many distinct 4 digit numbers greater than 3000 can be formed?

If 137 + 276 = 435 how much is 731+ 672 ?