Central Public Works Department Civil Engineering model question papers

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1. Timber can be made reasonably fire-
resistant by
a. soaking it in Ammonium Sulphate
b. coating with Tar paint
c. pumping creosote oil into timber under high pressure
d. seasoning process
2. Which one of the following statements is
the correct description of the structure of fibre board ?
a. Thin slices of superior quality of wood are glued and pressed on the surface of
inferior wood
b. Streamed mass of wood dusts, wood wool and other vegetable fibres are
pressed hard to a thickness varying from 3 mm to 12 mm
c. Thin and narrow wood shavings are soaked in a refractory binder material
and pressed hard
d. Thin and narrow wood shaving are soaked in a refractory binder material
and pressed hard
3. Match List I(Constituents of bricks) with
List II(corresponding influence) and select the correct answer :
List I
A. Alumina
B. Silica
C. Magnesia
D. Limestone
List II
1. Colour of brick
2. Plasticity recovery for moulding
3. Reacts with silica during burning and
causes particles to unite together and development of strength
4. Preserve the for on brick at high temperature and prevents shrinkage
A B C D
a. 2 1 4 3
b. 3 4 1 2
c. 2 4 1 3
d. 3 1 4 2
4. In some brick masonry walls, patches of
whitish crystals were found on the exposed surfaces, also chipping and spalling of bricks took place from the same walls. Which among the following are the causes of these defects ?
1. Settlement of foundation
2. Over-loading of the walls
3. Sulphate attach
4. Efflorescence
a. 1 and 2
b. 2 and 3
c. 2 and 4
d. 3 and 4
5. Match List I with list II and select the
correct answer : List I(Property)
A. Specific heat of an aggregate
B. Thermal conductivity of an aggregate
C. Thermal expansion
D. Durability of concrete
List II(Characteristic)
1. Breaks the bond between the aggregate and the paste
2. Is a measure of its heat capacity
3. Is affected by differences n thermal
expansion of two different materials
4. Is a measure of its ability to conduct
heat
A B C D
a. 1 3 2 4
b. 2 4 1 3
c. 1 4 2 3
d. 2 3 1 4
6. Consider the following methods of
preservation of timber :
1. Pressure application
2. Brush application

3. Dipping
4. Open tank application
The correct sequence of these methods in the increasing order of their effectiveness is :
a. 1, 3 4, 2
b. 3, 4, 2, 1
c. 2, 3, 4, 1
d. 4, 2, 1, 3
7. Match List I with List II and select the
correct answer :
List I (Name of defect)
A. Cupping
B. Bowing
C. Chucks
D. Knots
List II(Definition)
1. Caused by wood limbs encased by the wood of the free trunk
2. Caused by grain irregularities in the board and can be eliminated by proper
stacking
3. Small cracks appearing at the ends of boards caused by too rapid drying
4. Unequal shrinking in the radial and
tangential direction A B C D
a. 1 2 3 4
b. 4 3 2 1
c. 1 3 2 4
d. 4 2 3 1
8. Match List I with list II and select the
correct answer :
List I (Type of cement)
A. Ordinary Portland cement
B. Rapid hardening cement
C. Low heat cement
D. Sulphate resistant cement
List II(Characteristics)
1. The percentage of C3S is maximum and is of the order of 50%
2. The percentages of C2S and C3S are the same and of the order of 40%
3. Reacts with silica during burning and
causes particles to unite together and development of strength
4. Preserves the for of brick at high temperature and prevents shrinkage
A B C D
a. 2 4 1 3
b. 3 1 4 2
c. 2 1 4 3
d. 3 4 1 2
9. Match List I with List II and select the
correct answer :
List I(Type of cement)
A. High strength Portland cement
B. Super sulphated cement
C. High alumina cement
D. Rapid hardening Protland cement
List II(Property/Characteristic)
1. Should not be used with any admixture
2. Is extremely resistant to chemical
attach
3. Gives a higher rate of heat development during hydration of
cement
4. has a higher content of tricalcium silicate
A B C D
a. 3 2 1 4
b. 4 1 2 3
c. 3 1 2 4
d. 4 2 1 3
10. Consider the following stages in the
manufacturing of bricks :
1. Weathering
2. Moulding
3. Tempering
The correct sequence of these stages in the manufacturing of the bricks, is
a. 1, 2, 3
b. 2, 3, 1
c. 1, 3, 2
d. 3, 2, 1
11. Four main oxides present in ordinary
Portland cement are : CaO, Al2O3, SiO2 and Fe2O3. Identify the correct ascending order of their proportions in a typical composition of OPC
a. Al2O3, Fe2O3, CaO, SiO2
b. Al2O3, CaO, Fe2O3, SiO2
c. Fe2O3, Al2O3, SiO2 , CaO

d. Fe2O3, SiO2 , Al2O3, CaO
12. Consider the following statements :
Pozzolana used as an admixture in concrete has the following advantages :
1. It improves workability with lesser
amount of water
2. It increases heat of hydration and so sets the concrete quickly
3. It increases resistance to attach by salts and sulphates
4. It leaches calcium hydroxide Select the correct answer using the code given below :
a. 1, 2, 3 and 4
b. 1, 2, and 4
c. 1 and 3
d. 2, 3 and 4
13. The length of time for which a concrete
mixture will remain plastic is usually more depended on
a. the setting time of cement than on the amount of mixing water and
atmospheric temperature
b. the atmospheric temperature than on the amount of mixing water and the
setting time of cement
c. the setting time of cement and the amount of mixing water than on
atmospheric temperature
d. the amount of mixing water used and atmospheric temperature than on the
setting time of cement
14.
Which one among the following is the correct free body diagram for a portal frame shown in Figure given above ?
a.
b.
c.
d.
15. Consider the following statements :
Mohr’s circle is used to determine the stress on an oblique section of a body subjected to
1. direct tensile stress on one plane accompanied by a shear stress
2. direct tensile stresses in two mutually perpendicular directions accompanied
by a simple shear stress
3. direct tensile stress in two mutually perpendicular directions
4. a simple shear stress
Select the correct answer using the codes given below :
a. 1 and 4
b. 2 and 3
c. 1, 2, 3 and 4
d. 1, 2 and 3
16. A bar of square cross- section, having an
area of cross-section ‘A’ is subjected to a compressive force ‘P’ as shown in the figure
The intensity of the tangential stress on the oblique plane is given by
a. P sin 2
b. P cos 2

c. P/2 sin2
d. P/2 cos 2
17. The ratio of the torsional moment s of
resistance of a solid circular shaft of diameter D, and a hollow circular shaft having external diameter d and internal diameter d is given by
4
2. Centroid
3. The plane sections remain plain
4. Extreme fibre
5. The cross-section is circular A B C D
a. 5 4 1 2
b. 3 1 2 4
D
a.
4
c.
4
5 1 2 4
b.
D
D
d
4 4
d 22.
4
d. 3 4 1 2 A rectangular beam of width 200 mm and
D depth 300 mm is subjected to a shear force
3 3
D
c.
d.
d
3
D
3
D
3 3
of 200 kN. The maximum shear stress produced in the beam is
a. 10.0 MPa
b. 7.5 MPa
D d
18. Clapeyron’s theorem is applied to
a. Simply supported beam
b. Propped cantilever beam
c. Fixed & continuous beam
d. Continuous beam only
19. The valiration of the hoop stress across the
thickness of a thick cylinder is
a. linear
b. uniform
c. parabolic
d. hyperbolic
20. The bulk modulus of elasticity of a
material is twice its modulus of rigidity. The Poisson’s ratio of the material is
a. 1/7
b. 2/7
c. 3/7
d. 4/7
21. Match List I with List II and select the
correct answer :
List I
A. Assumption in the theory of simple bending
B. The point at which the bending stress is maximum for any cross-section
C. The point at which the bending stress
is zero for an y cross-section
D. The point in the cross-section through which the neutral axis passes
List II
1. Neutral axis
c. 5.0 MPa
d. 3.00 MPa
23. A symmetrical channel section is made of
a material which is equally strong in tension and compression. It is used as a simply supported beam with its web horizontal to carry vertical loads. It will
a. be strongest if the web is used as top
face
b. be strongest if the web is used as bottom face
c. be equally strong in (a) and (b) above
d. not be possible to state which of the
above statements is correct
24. For which of the following conditions, the
virtual work should be zero according to the Principle of virtual work ?
1. A body moving with constant acceleration
2. A body rotating with constant speed
3. A body in equilibrium
4. A body moving with constant momentum
Select the correct answer using the codes given below :
a. 1 only
b. 1 and 2
c. 3 only
d. 4 only
25.

c. Zero
p1 and p2 are two equal tensile principal stresses. On the plane AB inclined at 45o to the plane of p1
a. the shear stress is a maximum
b. the normal stress is zero
c. the shear stress is zero
d. the normal stress is maximum
26.
In the symmetrical channel section shown in the figure, which point is likely to be the shear center ?
a. A
b. B
c. C
d. D
27.
The force in member AB is
a. 5kN compression
b. 2 kN compression
c. Zero
d. 7 kN compression
28.
The force in the member BD of the truss shown in the figure given above is
a. 4 kN tensile
b. 4 kN compressive
d. 12 kN compressive
29. A free body diagram of a body shows
a. A body isolated from all external effects without considering its own
weight
b. A body isolated form its surroundings and all external forces acting on it
c. A body isolated from its surroundings
and all external actions on it
d. A body isolated fro its surroundings and all internal forces acting on it
30. Neglecting self weight, which of the
following beams will have points of contraflexure?
a. A simply supported beam with uniformly distributed load over part of
the structure
b. An overhanging beam with loading only over supported span and not on
overhangs
c. Fixed beam subjected to concentrated load
d. Cantilever beam subjected to
uniformly varying load with zero load at free end
31.
The absolute maximum bending moment in the beam is
a. 2Pa
b. 5Pa
c. 4Pa
d. 7Pa
32. Which one of the following pairs is NOT
correctly matched ?
Boundary conditions Euler’s buckling of column load
a. Both ends hinged : 2El / l2
b. Both ends fixed : 42El / l2
c. One end fixed and : El / 4l2
other end free

d. One end fixed and : 2 2El/l2
the other hinged
33. For a two-hinged parabolic arch, V= is
sum of the vertical forces on the left hand side of the section. H is the horizontal thrust. If  is the angle of tangent at the point on arch with the horizontal, the shearing force at section form left hand side is given by
a. Vx sin  - H cos 
b. Vx cos  - H sin 
c. Vx sin  + H cos 
d. Vx cos  + H sin 
a. Both b and c are in tension
b. Both b and c are in compression
c. b is in tension, c is in compression
d. b is in compression, c is in tension
36. Match List I with List II and select the
correct answer :
List I
A. Torque-twist relationship for a circular shaft
B. Strain energy of elastic torsion
C. Circumferential shear stress
D. Maximum shearing stress due to combined torsion and direct stress
List II
2 2
1. 1/2   4
2. Gr / l
34.
In the truss shown in the figure given above, which one of the following members has no force induced in it ?
a. CD
b. CE
c. CF
d. DF
35.
A joint of a roof truss has been isolated and shown in Figure (i). the force polygon for the joint is the shown in Figure (ii). Member ‘a’ is in compression, member ‘d’ is in tension.
Which one of the following is correct ?
3. (GJ/2l)2
4. GJ 
l
A B C D
a. 2 3 4 1
b. 4 1 2 3
c. 2 1 4 3
d. 4 3 2 1
37.
A beam (El = constant) of span L is subjected to clockwise moments M at both the ends A and B. The rotation of end A works out to be
a. ML / 2 El
b. ML / 3 El
c. ML / 4 El
d. ML / 6 El
38. Consider the following statements :
The principle of superposition is not applicable when
1. the material does not obey Hooke’s law
2. the effect of temperature changes are taken into consideration
3. the structure is being analysed for the effect of support settlement
Which of the above statements is/are correct ?

a. 1 only
b. 1 and 2
c. 2 and 3
d. 1, 2 and 3
39. Which of the following apply to ‘fully
rigid design’ of steel structures ?
1. End connections are capable of
transmitting moments
2. angle between member s at the joint does not change
3. The structure is assumed to be pin- pointed
4. A reduction in the maximum bending moment is permitted to provide a
degree of direction fixity
Select the correct answer using the codes given below :
a. 1, 2 and 3
b. 1 and 2
c. 1, 3 and 4
d. 2, 3 and 4
40.
For the propped cantilever shown in the figure, influence line for reaction at the propped end is given by y1 = f(x). The influence line ordinate (y2) for moment at A is given by the equation
a. y2 = f(x)
b. y2 = f(x) . x
c. y2 = x - f(x) .x
d. y2 = x - f(x). L
41. In a system two weightless rigid bars AB
and BC of length ‘a’ each having hinge supports at the ends. A and C, respectively, are connected to each other at B by a frictionless hinge (internal hinge). The rotation at the hinge is restrained by a rotational spring of stiffness k and system assumes a straight line configuration ABC. The rotation at the supports due to vertical load P acting at joint B is
a. Pa / 2k
b. Pa / 4k
c. Pa / k
d. 2 Pa / k
42. A solid circular shaft, ABC, has a total
length of ‘3 a’. A gear wheel positioned at B, at distance ‘a ‘from the left hand end A, exerts a torque T. If the ends A and C are instantaneously locked in position by brakes just before the torque is applied, the torsional moments induced in both segments T1 (AB) and T2 (BC) are in the ratio
a. 3 : 1
b. 2 : 3
c. 1 : 2
d. 2 : 1
43.
The degree of indeterminacy of the beam given above is
a. zero
b. one
c. two
d. three
44.
For the frame shown above, the distribution factors for members BC and BA at joint B are
a. 0.4, 0.6
b. 0.5, 0.5
c. 0.6, 0.4
d. 0.7, 0.3
45. Creep of a material is a property indicated
by
a. a time-dependent strain of the material
b. elongation of the material due to
changes in the material properties
c. shortening caused by shrinkage of the
member
d. the decrease in the volume of the material affected by the weather
conditions
46. Principle of minimum strain energy is

1. a particular case of Castigliano’s first theorem
2. a particular case of Castigliano’s second theorem
3. applicable only when the redundant supports do not yield
4. applicable even when the redundant supports yield
Select the correct answer using the codes given below :
a. 1 and 3
b. 1 and 4
c. 2 and 3
d. 2 and 4
47. Two shafts having same length and
material are joined in series and subjected to a torque of 10 kNm. If the ratio of their diameters is 2 : 1, then the ratio of their angles of twist is
a. 16 : 1
b. 2 : 1
c. 1 : 2
d. 1 : 16

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