MCQOPTIONS
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MCQOPTIONS
This section includes 374 Mcqs, each offering curated multiple-choice questions to sharpen your Civil Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 251. |
A cylinder will slip on an inclined plane of inclination 0 if the coefficient of static friction between plane and cylinder is |
| A. | less than (1/3) tan 0 |
| B. | less than (2/3) tan 0 |
| C. | less than (1/3) sin 6 |
| D. | less than (2/3) sin 6 |
| Answer» B. less than (2/3) tan 0 | |
| 252. |
A body A of mass 6.6 kg which is lying on a horizontal platform 4.5 m from its edge is connected to the end of a light string whose other end is supporting a body of mass 3.2 kg as shown in below figure. If the friction between the platform and the body A is 1/3, the acceleration is |
| A. | 0.5 m/sec² |
| B. | 0.75 m/sec² |
| C. | 1.00 m/sec² |
| D. | 1.25 m/sec² |
| Answer» D. 1.25 m/sec² | |
| 253. |
A ball which is thrown upwards, returns to the ground describing a parabolic path during its flight |
| A. | Vertical component of velocity remains constant |
| B. | Horizontal component of velocity remains constant |
| C. | Speed of the ball remains constant |
| D. | Kinetic energy of the ball remains constant |
| Answer» C. Speed of the ball remains constant | |
| 254. |
When a body in equilibrium undergoes an infinitely small displacement, work imagined to be done, is known as |
| A. | Imaginary work |
| B. | Negative work |
| C. | Virtual work |
| D. | None of these |
| Answer» D. None of these | |
| 255. |
The rotational velocity of a satellite is increased by 450 m per second if its launch is done from equator |
| A. | Eastward |
| B. | Northward |
| C. | Westward |
| D. | Southward |
| Answer» B. Northward | |
| 256. |
To attain the synchronous orbit, the launch of a satellite, is done from a place |
| A. | On equator |
| B. | On 30° latitude |
| C. | On 45° latitude |
| D. | On the poles |
| Answer» B. On 30° latitude | |
| 257. |
If ‘v’ and ‘ω’ are linear and angular velocities, the centripetal acceleration of a moving body along the circular path of radius ‘r’, will be |
| A. | r/v² |
| B. | v²/r |
| C. | r/ω² |
| D. | ω²/r |
| Answer» C. r/ω² | |
| 258. |
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 |
| A. | 109.5 mm from A |
| B. | 119.5 mm from A |
| C. | 125.5 mm from A |
| D. | 132.5 mm from A |
| Answer» B. 119.5 mm from A | |
| 259. |
The shape of a suspended cable for a uniformly distributed load over it is |
| A. | Circular |
| B. | Parabolic |
| C. | Catenary |
| D. | Cubic parabola |
| Answer» C. Catenary | |
| 260. |
Power developed by a torque, is |
| A. | 2πNT kg m/min |
| B. | 2πNT/4500 h.p |
| C. | 2πNT /60 watts |
| D. | All the above |
| Answer» E. | |
| 261. |
The resultant of two forces P and Q is R. If Q is doubled, the new resultant is perpendicular to P. Then, |
| A. | P = R |
| B. | Q = R |
| C. | P = Q |
| D. | None of the above is correct |
| Answer» C. P = Q | |
| 262. |
The torque produced by a force depends oni. the magnitude of the forceii. the direction of the forceiii. the point of application of the force relative to originThe correct answer is |
| A. | only (i) |
| B. | both (i) and (ii) |
| C. | both (i) and (iii) |
| D. | all (i), (ii) and (iii) |
| Answer» E. | |
| 263. |
If a body is lying on a plane whose inclination with the horizontal is less than the angle of friction, theni. a force is required to move the body upwardsii. a force is required to move the body downwardiii. the body will not be in equilibriumThe correct answer is |
| A. | only (i) |
| B. | only (ii) |
| C. | both (i) and (ii) |
| D. | both (i) and (iii) |
| Answer» D. both (i) and (iii) | |
| 264. |
A 2 m long ladder rests against a wall and makes an angle of 30° with the horizontal floor. Where will be the instantaneous center of rotation when the ladder starts slipping ?i. 1.0 in from the wallii. 1.732 m from the walliii. 1.0 m above the flooriv. 1.732 m above the floorThe correct answer is |
| A. | (i) and (iii) |
| B. | (i) and (iv) |
| C. | (ii) and (iii) |
| D. | (ii) and (iv) |
| Answer» E. | |
| 265. |
The condition of equilibrium for any system of forces in a plane is |
| A. | That polygon of forces must close |
| B. | That resultant couple must be zero |
| C. | Both (A) and (B) |
| D. | None of the above |
| Answer» D. None of the above | |
| 266. |
On a mass ‘m’ describing a circular path of radius ‘r’, the centrifugal force |
| A. | Acts tangentially to the circular path |
| B. | Acts towards the centre of rotation |
| C. | Acts away from the centre of rotation |
| D. | Is mw2r/g kgf |
| Answer» C. Acts away from the centre of rotation | |
| 267. |
The centre of gravity of a plane lamina will not be at its geometrical centre if it is a |
| A. | Circle |
| B. | Equilateral triangle |
| C. | Rectangle |
| D. | Right angled triangle |
| Answer» E. | |
| 268. |
The pole distance is measured in |
| A. | distance scale |
| B. | force scale |
| C. | mass scale |
| D. | time scale |
| Answer» C. mass scale | |
| 269. |
The phenomenon of collision of two elastic bodies takes place because bodies |
| A. | Immediately after collision come momentarily to rest |
| B. | Tend to compress each other till they are compressed maximum possible |
| C. | Attempt to regain its original shape due to their elasticities |
| D. | All the above |
| Answer» E. | |
| 270. |
A system of coplanar forces acting on a rigid body can be reduced to |
| A. | One force only |
| B. | One couple only |
| C. | One force and one couple only |
| D. | None of the above |
| Answer» D. None of the above | |
| 271. |
The characteristic of a couple is: |
| A. | Algebraic sum of forces, constituting a couple is zero |
| B. | Algebraic sum of moments of forces, constituting a couple, about any point, is same |
| C. | A couple can be never the balanced by a single force |
| D. | All the above |
| Answer» E. | |
| 272. |
The centre of gravity of the trapezium as shown in below figure from the side is at a distance of |
| A. | (h/3) × [(b + 2a)/(b + a)] |
| B. | (h/3) × [(2b + a)/(b + a)] |
| C. | (h/2) × [(b + 2a)/(b + a)] |
| D. | (h/2) × [(2b + a)/(b + a)] |
| Answer» B. (h/3) × [(2b + a)/(b + a)] | |
| 273. |
In SI units, the units of force and energy are respectively |
| A. | Newton and watt |
| B. | Dyne and erg |
| C. | Newton and joule |
| D. | kg wt and joule |
| Answer» D. kg wt and joule | |
| 274. |
In a lifting machine a weight of 5 kN is lifted through 200 mm by an effort of 0.1 kN moving through 15 m. The mechanical advantage and velocity ratio of the machine are respectively |
| A. | 50 and 75 |
| B. | 75 and 50 |
| C. | 75 and 75 |
| D. | 50 and 50 |
| Answer» B. 75 and 50 | |
| 275. |
A marble ball is rolled on a smooth floor of a room to hit a wall. If the time taken by the ball in returning to the point of projection is twice the time taken in reaching the wall, the coefficient of restitution between the ball and the wall, is |
| A. | 0.25 |
| B. | 0.50 |
| C. | 0.75 |
| D. | 1.0 |
| Answer» C. 0.75 | |
| 276. |
A ball is dropped from a height of 2.25 m on a smooth floor and rises to a height of 1.00 m after the bounce. The coefficient of restitution between the ball and the floor is |
| A. | 0.33 |
| B. | 0.44 |
| C. | 0.57 |
| D. | 0.67 |
| Answer» E. | |
| 277. |
The ratio of the moment of inertia of a rectangle about its centroidal axis to the moment of inertia about its base, is |
| A. | 1/4 |
| B. | 1/2 |
| C. | 3/4 |
| D. | 2 |
| Answer» B. 1/2 | |
| 278. |
When a body slides down an inclined surface, the acceleration (f) of the body, is given by |
| A. | f = g |
| B. | f = g sin θ |
| C. | f = g cos θ |
| D. | f = g tan θ |
| Answer» C. f = g cos θ | |
| 279. |
The total time of collision and restitution of two bodies, is called |
| A. | Time of collision |
| B. | Period of collision |
| C. | Period of impact |
| D. | All the above |
| Answer» E. | |
| 280. |
A quantity whose dimensions are M2L2T3 could be the product of |
| A. | force and pressure |
| B. | mass and power |
| C. | energy and velocity |
| D. | force and velocity |
| Answer» C. energy and velocity | |
| 281. |
A ball is dropped from a height of 16 m on a horizontal floor. If it rebounds to a height of 9 m after striking the floor, the coefficient of restitution between ball and floor is |
| A. | 1/4 |
| B. | 2/3 |
| C. | 3/4 |
| D. | 4/3 |
| Answer» D. 4/3 | |
| 282. |
At the instantaneous center, the velocity of the moving lamina at any instant is |
| A. | Zero |
| B. | Maximum |
| C. | Minimum |
| D. | Varying |
| Answer» B. Maximum | |
| 283. |
The angular speed of a car while taking a circular turn of radius 100 m at 36 km/hour, is |
| A. | 0.1 radian/sec |
| B. | 1 radian/sec |
| C. | 100 radian/sec |
| D. | 1000 radian/sec |
| Answer» B. 1 radian/sec | |
| 284. |
A shell of mass 100 kg travelling with a velocity of 10 m/sec breaks into two equal pieces during an explosion which provides an extra kinetic energy of 20000 Joules. If the pieces continue to move in the same direction as before, then the speed of the faster one must be |
| A. | 20 m/sec |
| B. | 30 m/sec |
| C. | 40 m/sec |
| D. | 50 m/sec |
| Answer» C. 40 m/sec | |
| 285. |
The equation of motion of a particle starting from rest along a straight line is x = t³ - 3t²+ 5. The ratio of the accelerations after 5 sec and 3 sec will be |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» E. | |
| 286. |
The equation of motion of a particle starting from rest along a straight line is x = t3 - 3l2 + 5. The ratio of the velocities after 5 sec and 3 sec will be |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» E. | |
| 287. |
A particle moves with a velocity of 2 m/sec in a straight line with a negative acceleration of 0.1 m/sec2. Time required to traverse a distance of 1.5 m, is |
| A. | 40 sec |
| B. | 30 sec |
| C. | 20 sec |
| D. | 15 sec |
| Answer» D. 15 sec | |
| 288. |
To double the period of oscillation of a simple pendulum |
| A. | The mass of its bob should be doubled |
| B. | The mass of its bob should be quadrupled |
| C. | Its length should be quadrupled |
| D. | Its length should be doubled |
| Answer» D. Its length should be doubled | |
| 289. |
The velocity of a moving body, is |
| A. | A vector quantity |
| B. | A scalar quantity |
| C. | A constant quantity |
| D. | None of these |
| Answer» B. A scalar quantity | |
| 290. |
The C.G. of the shaded area of the below figure whose curve OM is a parabola from y-axis, is |
| A. | a/4 |
| B. | 3a/4 |
| C. | 3b/10 |
| D. | 3a/10 |
| Answer» C. 3b/10 | |
| 291. |
One half of a vibration of a body, is called |
| A. | Period time |
| B. | Oscillation |
| C. | Beat |
| D. | Amplitude |
| Answer» D. Amplitude | |
| 292. |
The product of mass and velocity of a moving a body, is called |
| A. | Moment |
| B. | Momentum |
| C. | Power |
| D. | Impulse |
| Answer» C. Power | |
| 293. |
A bullet weighing 10 gm moves with a velocity of l km/sec. Its kinetic energy is(i) 5000 Nm(ii) 5000 kg.m(iii) 5000 J |
| A. | Only (ii) |
| B. | Both (i) and (iii) |
| C. | Both (ii) and (iii) |
| D. | All (i), (ii) and (iii) |
| Answer» C. Both (ii) and (iii) | |
| 294. |
One end of an elastic string of natural length ‘l’ 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 |
| A. | A simple harmonic motion |
| B. | A rectilinear motion with constant speed |
| C. | A damped oscillatory motion |
| D. | None of the above |
| Answer» B. A rectilinear motion with constant speed | |
| 295. |
The beam shown in below figure is supported by a hinge at ‘A’ and a roller at ‘B’. The reaction RA of the hinged support ‘A’ of the beam, is |
| A. | 10.8 t |
| B. | 10.6 t |
| C. | 10.4 t |
| D. | 10.2 t |
| Answer» E. | |
| 296. |
For a body moving with simple harmonic motion, the number of cycles per second, is known as its |
| A. | Oscillation |
| B. | Amplitude |
| C. | Periodic time |
| D. | Frequency |
| Answer» E. | |
| 297. |
The resultant of the forces acting on a body will be zero if the body |
| A. | Rotates |
| B. | Moves with variable velocity in a straight line |
| C. | Moves along a curved path |
| D. | Does not move at all |
| Answer» E. | |
| 298. |
If two bodies of masses M1 and M2(M1 > M2) are connected by alight inextensible string passing over a smooth pulley, the tension in the string, will be given by |
| A. | T = g(M1 - M2)/(M1 + M2) |
| B. | T = g(M1 + M2)/(M1 × M2) |
| C. | T = g(M2 - M1)/(M1 + M2) |
| D. | T = g(M2 + M1)/(M2 - M1) |
| Answer» B. T = g(M1 + M2)/(M1 × M2) | |
| 299. |
When a body of mass M1 is hanging freely and another of mass M2 lying on a smooth inclined plane(α) are connected by a light index tensile string passing over a smooth pulley, the acceleration of the body of mass M1, will be given by |
| A. | g(M1 + M2 sin α)/(M1 + M2) m/sec |
| B. | g(M1 - M2 sin α)/(M1 + M2) m/sec² |
| C. | g(M2 + M1 sin α)/(M1 + M2) m/sec² |
| D. | g(M2 × M1 sin α)/(M2 - M1) m/sec² |
| Answer» C. g(M2 + M1 sin α)/(M1 + M2) m/sec² | |
| 300. |
The masses of two balls are in the ratio of 2 : 1 and their respective velocities are in the ratio of 1 : 2 but in opposite direction before impact. If the coefficient of restitution is ½, the velocities of separation of the balls will be equal to |
| A. | Original velocity in the same direction |
| B. | Half the original velocity in the same direction |
| C. | Half the original velocity in the opposite direction |
| D. | Original velocity in the opposite direction |
| Answer» E. | |