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.
| 201. |
For a self-locking machine, the efficiency should be |
| A. | Less than 60% |
| B. | 50% |
| C. | More than 50% |
| D. | None of these |
| Answer» B. 50% | |
| 202. |
A ball moving on a smooth horizontal table hits a rough vertical wall, the coefficient of restitution between ball and wall being 1/3. The ball rebounds at the same angle. The fraction of its kinetic energy lost is |
| A. | 1/3 |
| B. | 2/3 |
| C. | 1/9 |
| D. | 8/9 |
| Answer» E. | |
| 203. |
The maximum velocity of a body vibrating with a simple harmonic motion of amplitude 150 mm and frequency 2 vibrations/sec, is |
| A. | 188.5 m/sec |
| B. | 18.85 m/sec |
| C. | 1.885 m/sec |
| D. | 0.18845 m/sec |
| Answer» D. 0.18845 m/sec | |
| 204. |
A flywheel of moment of inertia 20 kg.m is acted upon by a tangential force of 5 N at 2 m from its axis, for 3 seconds. The increase in angular velocity in radian per second is |
| A. | 1/2 |
| B. | 3/2 |
| C. | 2 |
| D. | 3 |
| Answer» C. 2 | |
| 205. |
The units of moment of inertia of an area are |
| A. | kg/m |
| B. | kg/m2 |
| C. | m4 |
| D. | m3 |
| Answer» D. m3 | |
| 206. |
If the horizontal range is 2.5 times the greatest height, the angle of projection of the projectile, is |
| A. | 57° |
| B. | 58° |
| C. | 59° |
| D. | 60° |
| Answer» C. 59° | |
| 207. |
A simple pendulum of length / has an energy E, when its amplitude is A. If the length of pendulum is doubled, the energy will be |
| A. | E |
| B. | E/2 |
| C. | 2E |
| D. | 4E |
| Answer» C. 2E | |
| 208. |
A simple pendulum of length 1 has an energy E when its amplitude is A. If its amplitude is increased to 2A, the energy becomes |
| A. | E |
| B. | E/2 |
| C. | 2E |
| D. | 4E |
| Answer» E. | |
| 209. |
A cable loaded with 0.5 tonne per horizontal metre span is stretched between supports in the same horizontal line 400 m apart. If central dip is 20 m, the minimum tension in the cable, will be |
| A. | 200 tonnes at the centre |
| B. | 500 tonnes at the centre |
| C. | 200 tonnes at the right support |
| D. | 200 tonnes at the left support |
| Answer» C. 200 tonnes at the right support | |
| 210. |
A disc of mass 4 kg, radius 0.5 m and moment of inertia 3 kg.m² rolls on a horizontal surface so that its center moves with speed 5 m/see. Kinetic energy of the disc is |
| A. | 50 J |
| B. | 150 J |
| C. | 200 J |
| D. | 400 J |
| Answer» D. 400 J | |
| 211. |
Instantaneous center is at infinity when the angular velocity is |
| A. | Constant |
| B. | Zero |
| C. | Maximum |
| D. | Minimum |
| Answer» C. Maximum | |
| 212. |
A circular disc rotates at n rpm. The angular velocity of a circular ring of same mass and radius as the disc and to have the same angular momentum is |
| A. | n rpm |
| B. | n/2 rpm |
| C. | n/4 rpm |
| D. | 2n rpm |
| Answer» C. n/4 rpm | |
| 213. |
The moment of inertia of a circular lamina of diameter ‘d’, about an axis perpendicular to the plane of the lamina and passing through its centre, is |
| A. | π/64 (D⁴ + d⁴) |
| B. | πd⁴/16 |
| C. | πd⁴/24 |
| D. | πd⁴/32 |
| Answer» E. | |
| 214. |
The resultant of two forces acting at right angles is √34 kg and acting at 60° is 70 kg. The forces are |
| A. | 1 kg and 4 kg |
| B. | 2 kg and 3 kg |
| C. | √3 kg and √5 kg |
| D. | 3 kg and 5 kg |
| Answer» E. | |
| 215. |
The angle which an inclined surface makes with the horizontal when a body placed on it is on the point of moving down, is called |
| A. | Angle of repose |
| B. | Angle of friction |
| C. | Angle of inclination |
| D. | None of these |
| Answer» B. Angle of friction | |
| 216. |
For lifting a load of 50 kg through a distance of 2.5 cm, an effort of 12.5 kg is moved through a distance of 40 cm. The efficiency of the lifting machine, is |
| A. | 60 % |
| B. | 65 % |
| C. | 70 % |
| D. | 75 % |
| Answer» E. | |
| 217. |
‘P’ is the force acting on a body whose mass is ‘m’ and acceleration is ‘f’. The equation P - mf= 0, is known as |
| A. | Equation of dynamics |
| B. | Equation of dynamic equilibrium |
| C. | Equation of statics |
| D. | None of these |
| Answer» B. Equation of dynamic equilibrium | |
| 218. |
If A is the amplitude of particle executing simple harmonic motion, then the total energy E of the particle is |
| A. | Proportional to A |
| B. | Proportional to A² |
| C. | Proportional to 1/A² |
| D. | Independent of A |
| Answer» C. Proportional to 1/A² | |
| 219. |
A particle is executing simple harmonic motion in a line 1.0 m long. If the time of one complete vibration is 1 sec, then the maximum velocity of the particle is |
| A. | 1.00 m/sec |
| B. | 1.57 m/sec |
| C. | 3.14 m/sec |
| D. | 6.28 m/sec |
| Answer» D. 6.28 m/sec | |
| 220. |
The resultant of two forces acting at right angles is 5 kgf and if they act at an angle of 60°, it is 37 kgf. The magnitudes of the forces are: |
| A. | 2 kgf, 3 kgf |
| B. | 3 kgf, 4 kgf |
| C. | 4 kgf, 5 kgf |
| D. | 5 kgf, 3 kgf |
| Answer» C. 4 kgf, 5 kgf | |
| 221. |
Varingon’s theorem of moment’s states |
| A. | Arithmetical sum of the moments of two forces about any point, is equal to the moments of their resultant about that point |
| B. | Algebraic sum of the moments of two forces about any point, is equal to the moment of their resultant about that point |
| C. | Arithmetical sum of the moments of the forces about any point in their plane, is equal to the moment of their resultant about that point |
| D. | Algebraic sum of the moments of the forces about any point in their plane, is equal to the moment of their resultant about that point |
| Answer» E. | |
| 222. |
A projectile is thrown at an angle ‘α’ to the horizontal with velocity ‘v’. It will have the maximum centripetal acceleration |
| A. | At the start |
| B. | At the top of the trajectory |
| C. | As it strikes the ground |
| D. | Elsewhere |
| Answer» B. At the top of the trajectory | |
| 223. |
If two equal forces of magnitude ‘P’ act at an angle ‘θ’, their resultant, will be |
| A. | P cos θ/2 |
| B. | 2P sin θ/2 |
| C. | P tan θ/2 |
| D. | 2P cos θ/2 |
| Answer» E. | |
| 224. |
In the structure shown in below figure, the member which carries zero force, is |
| A. | AB |
| B. | BC |
| C. | BE |
| D. | All the above |
| Answer» E. | |
| 225. |
The member which does not carry zero force in the structure shown in below figure, is |
| A. | ED |
| B. | DC |
| C. | BC |
| D. | BD |
| Answer» E. | |
| 226. |
The vertical reaction at the support ‘A’ of the structure shown in below figure, is |
| A. | 1 t |
| B. | 2 t |
| C. | 3 t |
| D. | 3.5 t |
| Answer» D. 3.5 t | |
| 227. |
If g1 and g2 are the gravitational accelerations on two mountains A and B respectively, the weight of a body when transported from A to B will be multiplied by |
| A. | g1 |
| B. | g2 |
| C. | g1/g2 |
| D. | g2/g1 |
| Answer» E. | |
| 228. |
If the angular distance, 0 = 2t³ ‑ 3t², the angular acceleration at t = 1 sec. is |
| A. | 1 rad/sec² |
| B. | 4 rad/sec² |
| C. | 6 rad/sec² |
| D. | 12 rad/sec² |
| Answer» D. 12 rad/sec² | |
| 229. |
The centre of gravity of a quadrant of a circle lies along its central radius at a distance of |
| A. | 0.2 R |
| B. | 0.4 R |
| C. | 0.3 R |
| D. | 0.6 R |
| Answer» E. | |
| 230. |
The units of inertia of mass are |
| A. | kg/m |
| B. | kg/m² |
| C. | m⁴ |
| D. | kg-m² |
| Answer» E. | |
| 231. |
A ball of mass 1 kg moving with a velocity of 2 m/sec collides a stationary ball of mass 2 kg and comes to rest after impact. The velocity of the second ball after impact will be |
| A. | Zero |
| B. | 0.5 m/sec |
| C. | 1.0 m/sec |
| D. | 2.0 m/sec |
| Answer» D. 2.0 m/sec | |
| 232. |
A ball moving with a velocity of 5 m/sec impinges a fixed plane at an angle of 45° and its direction after impact is equally inclined to the line of impact. If the coefficient of restitution is 0.5, the velocity of the ball after impact will be |
| A. | 0.5 m/sec |
| B. | 1.5 m/sec |
| C. | 2.5 m/sec |
| D. | 3.5 m/sec |
| Answer» D. 3.5 m/sec | |
| 233. |
The maximum frictional force which comes into play, when a body just begins to slide over the surface of a another body, is known |
| A. | Sliding friction |
| B. | Rolling friction |
| C. | Limiting friction |
| D. | None of these |
| Answer» D. None of these | |
| 234. |
Lami's theorem states that |
| A. | Three forces acting at a point are always in equilibrium |
| B. | If three forces acting on a point can be represented in magnitude and direction by the sides of a triangle, the point will be in the state of equilibrium |
| C. | Three coplanar forces acting at a point will be in equilibrium, if each force is proportional to the sine of the angle between the other two |
| D. | Three coplanar forces acting at a point will be in equilibrium if each force is inversely proportional to the sine of the angle between the other two |
| Answer» D. Three coplanar forces acting at a point will be in equilibrium if each force is inversely proportional to the sine of the angle between the other two | |
| 235. |
Rate of change of angular momentum is equal to |
| A. | Force |
| B. | Torque |
| C. | Linear momentum |
| D. | Impulse |
| Answer» C. Linear momentum | |
| 236. |
If the kinetic energy and potential energy of a simple harmonic oscillator of amplitude A are both equal to half the total energy, then the displacement is equal to |
| A. | A |
| B. | A/2 |
| C. | A/√2 |
| D. | A√2 |
| Answer» D. A√2 | |
| 237. |
The torque produced by a force depends on(i) The magnitude of the force(ii) The direction of the force(iii) The point of application of the force relative to origin |
| A. | Only (i) |
| B. | Both (i) and (ii) |
| C. | Both (i) and (iii) |
| D. | All (i), (ii) and (iii) |
| Answer» E. | |
| 238. |
At a given instant ship ‘A’ is travelling at 6 km/h due east and ship ‘B’ is travelling at 8 km/h due north. The velocity of ‘B’ relative to ‘A’ is |
| A. | 7 km/hrs |
| B. | 2 km/hrs |
| C. | 1 km/hrs |
| D. | 10 km/hrs |
| Answer» E. | |
| 239. |
If two forces P and Q (P > Q) act on the same straight line but in opposite direction, their resultant, is |
| A. | P + Q |
| B. | P/Q |
| C. | Q/P |
| D. | P - Q |
| Answer» E. | |
| 240. |
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 |
| 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 | |
| 241. |
If the angle of projection is double the angle of inclination (α) of the plane on which particle is projected, the ratio of times of flight up the inclined plane and down the inclined plane, will be |
| A. | ½ cos α |
| B. | ½ sin α |
| C. | ½ tan α |
| D. | 2 cos α |
| Answer» B. ½ sin α | |
| 242. |
A particle is dropped from the top of a tower 60 m high and another is projected upwards from the foot of the tower to meet the first particle at a height of 15.9 m. The velocity of projection of the second particle is |
| A. | 16 m/sec |
| B. | 18 m/sec |
| C. | 20 m/sec |
| D. | 22 m/sec |
| Answer» D. 22 m/sec | |
| 243. |
A funicular polygon cannot be made to pass through |
| A. | One specified point |
| B. | Two specified points |
| C. | Three specified points |
| D. | More than three specified points |
| Answer» E. | |
| 244. |
It is observed that in a certain sinusoidal oscillation, the amplitude is linearly dependent on the frequency f. If the maximum velocity during the oscillation is V, then V must be proportional to |
| A. | f |
| B. | 1/f |
| C. | 1/f² |
| D. | f² |
| Answer» E. | |
| 245. |
M.I. of a thin ring (external diameter D, internal diameter d) about an axis perpendicular to the plane of the ring, is |
| A. | π/64 (D⁴ + d⁴) |
| B. | π/32 (D⁴ - d⁴) |
| C. | π/32 (D⁴ + d⁴) |
| D. | π/32 (D⁴ × d⁴) |
| Answer» C. π/32 (D⁴ + d⁴) | |
| 246. |
The angle of friction is: |
| A. | The ratio of the friction and the normal reaction |
| B. | The force of friction when the body is in motion |
| C. | The angle between the normal reaction and the resultant of normal reaction and limiting friction |
| D. | The force of friction at which the body is just about to move |
| Answer» D. The force of friction at which the body is just about to move | |
| 247. |
Impulse can be obtained from a |
| A. | Force-displacement diagram |
| B. | Force-time diagram |
| C. | Velocity-time diagram |
| D. | Velocity-displacement diagram |
| Answer» C. Velocity-time diagram | |
| 248. |
Pick up the incorrect statement from the following. In case of suspension bridge due to rise in temperature, |
| A. | Dip of the cable increases |
| B. | Length of the cable increases |
| C. | Dip of the cable decreases |
| D. | None of these |
| Answer» D. None of these | |
| 249. |
Pick up the incorrect statement from the following. In a simple harmonic motion |
| A. | Velocity is maximum at its mean position |
| B. | Velocity is minimum at the end of the stroke |
| C. | Acceleration is minimum at the end of the stroke |
| D. | Acceleration is zero at the mean position |
| Answer» D. Acceleration is zero at the mean position | |
| 250. |
The following factor affects the orbit of a satellite up to an altitude of 720 km from the earth's surface |
| A. | Uneven distribution of the gravitational field |
| B. | Gravity of the sun and the moon |
| C. | Aerodynamic forces |
| D. | None of these |
| Answer» E. | |