civil engineering Mcqs
1101. The horizontal component of force on a curved surface is equal to the_______________?
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A. weight of liquid vertically above the curved surface

B. product of pressure intensity at its centroid and area

C. force on a vertical projection of the curved surface

D. force on the horizontal projection of the curved surface

1102. Tangent of angle of friction is equal to_________________?
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A. angle of repose

B. friction force

C. limiting friction

D. kinetic friction

E. coefficient of friction
1103. Pick up the correct statement from the following?
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A. The bending stress at the outer fibres, is known as principal stress

B. The bending stress in a section is zero at its neutral axis and maximum at the outer fibres

C. All the above

D. The shear stress is zero at the outer fibres and maximum at the neutral axis

1104. A simply supported beam carries a varying load from zero at one end and w at the other end. If the length of the beam is a, the shear force will be zero at a distance x from least loaded point where x is_________________?
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A. a/2

B. a

C. a

D. a/3

1105. If a vessel containing liquid moves downward with a constant acceleration equal to g then_____________?
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A. the pressure throughout the liquid mass is atmospheric

B. there will be vacuum in the liquid

C. none of the above

D. the pressure in the liquid mass is greater than hydrostatic pressure

1106. Maximum shear stress theory for the failure of a material at the elastic limit, is known________________?
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A. Rankines theory

B. St. Venants theory

C. Guests or Trecas theory

D. Haigs theory

1107. A body is said to be in equilibrium if___________________?
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A. It moves horizontally

B. It moves vertically

C. None of these

D. It rotates about its C.G.

1108. In series-pipe problems_______________?
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A. the discharge is same through each pipe

B. a trial solution is not necessary

C. the discharge through each pipe is added to obtain total discharge

D. the head loss is same through each pipe

1109. Pick up the incorrect statement from the following: The torsional resistance of a shaft is directly proportional to___________________?
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A. Modulus of rigidity

B. Angle of twist

C. Moment of inertia of the shaft section

D. Reciprocal of the length of the shaft

1110. Centre of buoyancy always_________________?
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A. remains above the centre of gravity

B. remains below the centre of gravity

C. coincides with the centre of gravity

D. coincides with the centroid of the volume of fluid displaced
1111. If the strain energy stored per unit volume in a hollow shaft subjected to a pure torque when t attains maximum shear stress fs the ratio of inner diameter to outer diameter, is 17/64 (f /N)s__________________?
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A. 2-Jan

B. 1/4

C. 5-Jan

D. 3-Jan

1112. A lift of weight W is lifted by a rope with an acceleration f. If the area of cross-section of the rope is A, the stress in the rope is_______________?
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A. [W (1 + f/ G)]/ A

B. [W (2 + f/G)]/A

C. (1 g/f)/A

D. [W (2 + g/f)]/A

1113. The maximum bending moment for a simply supported beam with a uniformly distributed load w/unit length, is_________________?
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A. WI/4

B. WI/2

C. WI/8

D. WI/12

1114. The eddy viscosity for turbulent flow is______________?
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A. a function of temperature only

B. independent of the flow

C. a physical property of the fluid.

D. dependent on the flow
1115. The assumption in the theory of bending of beams is_________________?
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A. All the above

B. Material is homogeneous

C. Youngs modulus is same in tension as well as in compression

D. Material is isotropic

1116. Co-efficient of wind resistance of a circular surface, is________________?
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A. 3-Jan

B. 2/3

C. 2-Mar

D. 2-Jan

1117. In plastic analysis, the shape factor for a circular section, is_________________?
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A. 1.7

B. 1.6

C. 1.5

D. 1.75

1118. A two hinged parabolic arch of span l and rise h carries a load varying from zero at the left end to________________?
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A. /8h

B. /16h

C. /4h thrust is

D. /12h

1119. The force in BC of the truss shown in the given figure, is___________________?
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A. t compression

B. t tension

C. 3.0 t compression

D. 3.0 t tension

1120. Coefficient of discharge for a totally submerged orifice as compared to that for an orifice discharging free is__________________?
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A. slightly more

B. equal

C. slightly less

D. nearly half

1121. P = / L is the equation for Eulers crippling load if_________________?
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A. Both the ends are fixed

B. Both the ends are hinged

C. One end is fixed and other end is free

D. One end is fixed and other end is hinged

1122. In a shaft, the shear stress is not directly proportional to_________________?
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A. Modulus of rigidity

B. Length of the shaft

C. Radius of the shaft

D. Angle of twist

1123. In the equation of virtual work, following force is neglected_______________?
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A. reaction of any smooth surface with which the body is in contact

B. all of the above

C. none of the above

D. reaction at a point or an axis, fixed in space, around which a body is con-strained to turn

E. reaction of a rough surface of a body which rolls on it without slipping

1124. The force in EC of the truss shown in the given figure, is__________________?
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A. 5t compression

B. Zero

C. 4t tension

D. 5t tension

1125. In plastic analysis, the shape factor for rectangular section, is________________?
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A. 1.7

B. 1.6

C. 1.4

D. 1.5
1126. In case of a simply supported rectangular beam of span L and loaded with a central load W, the length of elasto-plastic zone of the plastic hinge, is__________________?
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A. L/2

B. L/5

C. L/4

D. L/3
1127. The horizontal deflection of a parabolic curved beam of span 10 m and rise 3 m when loaded with a uniformly distributed load l t per horizontal length is (where Ic is the M.I. at the crown, which varies as the slope of the arch)___________________?
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A. 200/EIc

B. 150/EIc

C. 50/EIc

D. 100/EIc

1128. The ratio of circumferential stress to the longitudinal stress in the walls of a cylindrical shell, due to flowing liquid, is__________________?
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A. 1

B. 2

D. 1

1129. Stream lines and path lines always coincide in case of__________________?
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A. laminar flow

B. uniform flow

C. steady flow

D. turbulent flow

1130. inertia of a rectangular section of width and depth about an axis passing The moment of through C.G. and parallel to its width is_______________?
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A. BD3/6

B. BD3/12

C. BD/6

D. BD/6

1131. The coefficient of friction depends on_________________?
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A. nature of surface

B. all of the above

C. shape of surfaces

D. area of contact

E. strength of surfaces

1132. section modulus of a square section of side B and that of a circular section of The ratio of the diameter D, is___________________?
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A. 15-Feb

B. /16

C. 8-Mar

D. 3 /16
1133. Slenderness ratio of a long column, is_________________?
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A. Radius of gyration divided by area of cross-section

B. Area of cross-section divided by least radius of gyration

C. Area of cross-section divided by radius of gyration

D. Length of column divided by least radius of gyration
1134. The distance from pipe boundary, at which the turbulent shear stress is one-third die wall shear stress, is_______________?
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A. 1/2 R

B. 1/3 R

C. 3/4R

D. 2/3 R

1135. A close coil helical spring of mean diameter D consists of n coils of diameter d. If it carries an axial load W, the energy stored in the spring, is______________?
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A. 4WD3n/d4N

B. 4WDn/d4N

C. 4WD3n/d4N

D. 4WDn/d4N

1136. The yield moment of a cross section is defined as the moment that will just produce the yield stress in_________________?
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A. The fibre everywhere

B. The outer most fibre of the section

C. The neutral fibre of the section

D. The inner most fibre of the section

1137. P=4EI/L is the equation of Eulers crippling load if________________?
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A. Both the ends are fixed

B. Both the ends are hinged

C. One end is fixed and other end is free

D. One end is fixed and other end is hinged

1138. A road of uniform cross-section A and length L force P. The Youngs Modulus E of the material, is_________________?
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A. E =/P. L

B. E = /A. L

C. E = P. A/

D. E = P. L/
1139. A spring of mean radius 40 mm contains 8 action coils of steel (N = 80000 N/mm2), 4 mm in diameter. The clearance between the coils being 1 mm when unloaded, the minimum compressive load to remove the clearance, is_____________?
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A. 35 N

B. 40 N

C. 30 N

D. 25 N

1140. The product of either force of couple with the arm of the couple is called________________?
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A. moment of the couple

B. moment of the forces

C. resultant couple

D. none of the above

E. resulting couple

1141. The force in AC of the truss shown in the given figure, is_________________?
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A. 5t compression

B. 4t compression

C. 5t tension

D. 4t tension
1142. Which of the following is not a scalar quantity__________________?
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A. volume

B. acceleration

C. time

D. density

E. mass

1143. A valve is suddenly closed in a water main in wl.ich the velocity is 1 m/sec and velocity of pressure wave is 981 m/ sec. The inertia head at the valve will be________________?
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A. none of the above

B. 10m

C. 1 m

D. 100m
1144. For determining the support reactions at A and B of a three hinged arch, points B and Care joined and produced to intersect the load line at D and a line parallel to the load line through A at D. Distances AD, DD and AD when measured were 4 cm, 3 cm and 5 cm respectively. The angle between the reactions at A and B is___________________?
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A. 30

B. 60

C. 45

D. 90
1145. The total pressure on a plane surface inclined at an angle 9 with the horizontal is equal to_______________?
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A. pA cos 9

B. pA sin 9

C. pA tan 9

D. PA
1146. The units of moment of inertia of an area are_______________?
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A. kg m2

B. kg/m2

C. m4

D. kg/m4

E. m3

1147. The correct relationship among displacement thickness d, momentum thickness m and energy thickness e is_________________?
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A. d > m > e

B. e > d > m

C. e > m > d

D. d > e > m

1148. The ratio of moments of inertia of a triangular section about its base and about a centroidal axis parallel to its base, is_________________?
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A. 2

B. 3.0

C. 1.5

D. 1

1149. A shaft is subjected to bending moment M and a torque T simultaneously. The ratio of the maximum bending stress to maximum shear stress developed in the shaft, is____________________?
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A. 2M/ T

B. M/T

C. T/M

D. 2T/M

1150. In case of principal axes of a section________________?
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A. Sum of moment of inertia is zero

B. Product of moment of inertia is zero

C. Difference of moment inertia is zero

D. None of these