civil engineering MCQs – Page 60

Practise multiple-choice questions from civil engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

civil engineering Mcqs
1181. The locus of reaction of a two hinged semi-circular arch, is_________________?
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A. Hyperbola

B. Parabola

C. Straight line

D. Circle

1182. A simply supported beam A carries a point load at its mid span. Another identical beam B carries the same load but uniformly distributed over the entire span. The ratio of the maximum deflections of the beams A and B, will be________________?
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A. 3-Feb

B. 2-Mar

C. 8/5

D. 8-May

1183. constant, depth of a cantilever of length of uniform strength loaded with Keeping breadth uniformly distributed load varies from zero at the free end and________________?
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A. l) at the fixed end

B. 2w w l at the fixed end

C. 3w l at the fixed end

D. w l) at the fixed end

1184. For permissible shear stress fs, the torque transmitted by a thin tube of mean diameter D and wall thickness t, is________________?
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A. ( /2) t fs

B. ( /2) t fs

C. ( /4) fs

D. D2t fs

1185. In a two dimensional incompressible steady flow around an airfoil, the stream lines are 2 cm apart at a great distance from the airfoil, where the velocity is 30 m/sec. The velocity near the airfoil, where the stream lines are 1.5 cm apart, is_________________?
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A. 22.5 m/sec

B. 90 m/sec

C. 33 m/sec

D. 40 m/sec
1186. A floating body is said to be in a state of stable equilibrium_________________?
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A. when the metacentre is below the centre of gravity

B. when its metacentric height is zero

C. when the metacentre is above the centre of gravity

D. only when its centre of gravity is below its centre of buoyancy

1187. If Biochemical oxygen demand (BOD. of a town is 20000 kg/day and BOD per capita per day is 0.05 kg, then population equivalent of town is_________________?
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A. 4000

B. 100000

C. 1000

D. 400000
1188. Which of the following represents the state of neutral equilibrium ?
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A. a smooth cylinder lying on a curved surface

B. a cube resting on one edge

C. a smooth cylinder lying on a convex surface

D. none of the above
1189. If A is the amplitude of particle executing simple harmonic motion, then the total energy E of the particle is___________________?
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A. proportional to 1/A2

B. proportional to A

C. proportional to A2

D. independent of A

1190. Dissolved oxygen in streams is______________?
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A. maximum at midnight

B. maximum at noon

C. same throughout the day

D. minimum at noon

1191. A rod AB carries three loads of 30 N, 70 N and 100 N at distances of 20 mm, 90 mm and 150 mm respectively from A. Neglecting the weight of the rod, the point at which the rod will balance is_______________?
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A. 125.5 mm from A

B. 109.5 mm from A

C. 132.5 mm from A

D. 119.5 mm from A

1192. The maximum discharge of a tube-well is about_________________?
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A. 5 litres/sec

B. 50 litres/sec

C. 1000 litres/see

D. 500 litres/sec

1193. The dissolved oxygen level in natural unpolluted waters at normal temperature is found to be of the order of________________?
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A. 100 mg/litre

B. 1 mg/litre

C. 1000 mg/litre

D. 10 mg/litre
1194. Residual chlorine in water is determined by________________?
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A. starch iodide method

B. orthotolidine method

C. both (A) and (B)

D. none of the above

1195. The type of valve, which is provided on the suction pipe in a tube-well, is____________?
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A. sluice valve

B. pressure relief valve

C. air relief valve

D. reflux valve
1196. If the time of concentration is 9 minutes, then the intensity of rainfall according to British Ministry of Health formula will be__________________?
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A. 20 mm/hr

B. 40 mm/hr

C. 4 mm/hr

D. lOmm/hr

1197. The angular speed of a car while taking a circular turn of radius 100m at 36 km/hour, is_______________?
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A. 100 radian/sec

B. 1000 radian/sec

C. 1 radian/sec

D. 0.1 radian/sec
1198. Free body diagram is an____________________?
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A. none of the above

B. isolated joint with all the forces, internal as well as external, acting on it

C. isolated joint with only body forces acting on it

D. isolated joint with internal forces acting on it

1199. The disinfection efficiency of chlorine increases by_______________?
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A. decreasing the time of contact

B. decreasing the temperature of water

C. increasing the temperature of water</strong>

D. correct answer is ?

E. only (1)

F. both (1) and (2)

1200. One end of an elastic string of natural length / and modulus X is kept fixed while to the other end is attached a particle of mass m which is hanging freely under gravity. The particle is pulled down vertically through a distance x, held at rest and then released. The motion is___________________?
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A. none of the above

B. a rectilinear motion with constant speed

C. a damped oscillatory motion

D. a simple harmonic motion