MCQOPTIONS
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MCQOPTIONS
This section includes 719 Mcqs, each offering curated multiple-choice questions to sharpen your Civil Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
Coulomb friction is the friction between_________________? |
| A. | bodies having relative motion |
| B. | two dry surfaces |
| C. | two lubricated surfaces |
| D. | solids and liquids |
| E. | electrically charged particles |
| Answer» B. two dry surfaces | |
| 102. |
Coefficient of friction is the__________________? |
| A. | angle between normal reaction and the resultant of normal reaction and the limiting friction |
| B. | ratio of limiting friction and normal reaction |
| C. | the friction force acting when the body is just about to move |
| D. | the friction force acting when the body is in motion |
| E. | tangent of angle of repose |
| Answer» C. the friction force acting when the body is just about to move | |
| 103. |
Center of percussion is______________? |
| A. | the point of C.G. |
| B. | the point of metacentre |
| C. | the point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis |
| D. | point of suspension |
| E. | the point in a body about which it can rotate horizontally and oscillate under the influence of gravity |
| Answer» D. point of suspension | |
| 104. |
Center of gravity of a thin hollow cone lies on the axis at a height of________________? |
| A. | one-fourth of the total height above base |
| B. | one-third of the total height above base |
| C. | one-half of the total height above base |
| D. | three-eighth of the total height above the base |
| E. | none of the above |
| Answer» C. one-half of the total height above base | |
| 105. |
Center of gravity of a solid cone lies on the axis at the height_______________? |
| A. | one-fourth of the total height above base |
| B. | one-third of the total height above base |
| C. | one-half of the total height above base |
| D. | three-eighth of the total height above the base |
| E. | none of the above |
| Answer» B. one-third of the total height above base | |
| 106. |
Angle oT friction is the___________________? |
| A. | angle between normal reaction and the resultant of normal reaction and the limiting friction |
| B. | ratio of limiting friction and normal reaction |
| C. | the ratio of minimum friction force to the friction force acting when the body is just about to move |
| D. | the ratio of minimum friction force to friction force acting when the body is in motion |
| E. | ratio of static and dynamic friction |
| Answer» B. ratio of limiting friction and normal reaction | |
| 107. |
According to principle of transmissibility of forces, the effect of a force upon a body is_______________? |
| A. | maximum when it acts at the center of gravity of a body |
| B. | different at different points in its line of action |
| C. | the same at every point in its line of action |
| D. | minimum when it acts at the C.G. of the body |
| E. | none of the above |
| Answer» D. minimum when it acts at the C.G. of the body | |
| 108. |
According to principle of moments_________________? |
| A. | if a system of coplanar forces is in equilibrium, then their algebraic sum is zero |
| B. | if a system of coplanar forces is in equilibrium, then the algebraic sum of their moments about any point in their plane is zero |
| C. | the algebraic sum of the moments of any two forces about any point is equal to moment of theiwesultant about the same point |
| D. | positive and negative couples can be balanced |
| E. | none of the above |
| Answer» C. the algebraic sum of the moments of any two forces about any point is equal to moment of theiwesultant about the same point | |
| 109. |
According to law of triangle of forces______________? |
| A. | three forces acting at a point will be in equilibrium |
| B. | three forces acting at a point can be represented by a triangle, each side being proportional to force |
| C. | if three forces acting upon a patticle are represented in magnitude and direction by the sides of a triangle, taken in order, they will be in equilibr |
| D. | if three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two |
| E. | none of the above |
| Answer» D. if three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two | |
| 110. |
According to Lami’s theorem________________? |
| A. | three forces acting at a point will be in equilibrium |
| B. | three forces acting at a point can be represented by a triangle, each side being proportional to force |
| C. | if three forces acting upon a particle are represented in magnitude and direction by the sides of a triangle, taken in order, they will be in equilibr |
| D. | if three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two |
| E. | none of the above |
| Answer» E. none of the above | |
| 111. |
A trolley wire weighs 1.2 kg per meter length. The ends of the wire are attached to two poles 20 meters apart. If the horizontal tension is 1500 kg find the dip in the middle of the span________________? |
| A. | 2.5 cm |
| B. | 3.0 cm |
| C. | 4.0 cm |
| D. | 5.0 cm |
| E. | 2.0 cm |
| Answer» D. 5.0 cm | |
| 112. |
A single force and a couple acting in the same plane upon a rigid body________________? |
| A. | balance each other |
| B. | cannot balance each other |
| C. | produce moment of a couple |
| D. | are equivalent |
| E. | none of the above |
| Answer» C. produce moment of a couple | |
| 113. |
A semi-circular disc rests on a horizontal surface with its top flat surface horizontal and circular portion touching down. The coefficient of friction between semi-cricular disc and horizontal surface is i. This disc is to be pulled by a horizontal force applied at one edge and it always remains horizontal. When the disc is about to start moving, its top horizontal force will____________________? |
| A. | remain horizontal |
| B. | slant up towards direction of pull |
| C. | slant down towards direction of pull |
| D. | unpredictable |
| E. | none of the above |
| Answer» D. unpredictable | |
| 114. |
A sample of metal weighs 219 gms in air, 180 gms in water, 120 gms in an unknown fluid. Then which is correct statement about density of metal________________? |
| A. | density of metal can’t be determined |
| B. | metal is twice as dense as water |
| C. | metal will float in water |
| D. | metal is twice as dense as unknown fluid |
| E. | none of the above |
| Answer» B. metal is twice as dense as water | |
| 115. |
A projectile is fired at an angle 9 to the vertical. Its horizontal range will be maximum when 9 is_________________? |
| A. | 0° |
| B. | 30° |
| C. | 45° |
| D. | 60° |
| E. | 90° |
| Answer» D. 60° | |
| 116. |
A particle moves along a straight line such that distance (x) traversed in t seconds is given by x = t2 (t – 4), the acceleration of the particle will be given by the equation_________________? |
| A. | 3t2-lt |
| B. | 3t2+2t |
| C. | 6f-8 |
| D. | 6f-4 |
| E. | 6t2-8t |
| Answer» D. 6f-4 | |
| 117. |
A particle inside a hollow sphere of radius r, having coefficient of friction -rr can rest upto height of__________________? |
| A. | r/2 |
| B. | r/A |
| C. | r/% |
| D. | 0.134 r |
| E. | 3r/8 |
| Answer» E. 3r/8 | |
| 118. |
A pair of smith’s tongs is an example of the lever of__________________? |
| A. | zeioth order |
| B. | first order |
| C. | second order |
| D. | third order |
| E. | third order |
| Answer» D. third order | |
| 119. |
A number of forces acting at a point will be in equilibrium if_________________? |
| A. | their total sum is zero |
| B. | two resolved parts in two directions at right angles are equal |
| C. | sum of resolved parts in any two per-pendicular directions are both zero |
| D. | all of them are inclined equally |
| E. | none of the above |
| Answer» D. all of them are inclined equally | |
| 120. |
A heavy string attached at two ends at same horizontal level and when central dip is very small approaches the following curve___________________? |
| A. | catenary |
| B. | parabola |
| C. | hyperbola |
| D. | elliptical |
| E. | circular arc |
| Answer» C. hyperbola | |
| 121. |
A heavy ladder resting on floor and against a vertical wall may not be in equilibrium, if______________? |
| A. | the floor is smooth, the wall is rough |
| B. | the floor is rough, the wall is smooth |
| C. | the floor and wall both are smooth surfaces |
| D. | the floor and wall both are rough sur-faces |
| E. | will be in equilibrium under all condi-tions |
| Answer» D. the floor and wall both are rough sur-faces | |
| 122. |
A framed structure is perfect if it contains members equal to________________? |
| A. | 2n-3 |
| B. | n-l |
| C. | ‘2n-l |
| D. | n – 2 |
| E. | 3n-2 |
| Answer» B. n-l | |
| 123. |
A force is completely defined when we specify________________? |
| A. | magnitude |
| B. | direction |
| C. | point of application |
| D. | all of the above |
| E. | none of the above |
| Answer» E. none of the above | |
| 124. |
A force acting on a body may_______________? |
| A. | introduce internal stresses |
| B. | balance the other forces acting on it |
| C. | retard its motion |
| D. | change its motion |
| E. | all of the above |
| Answer» F. | |
| 125. |
A flywheel on a motor goes from rest to 1000 rpm in 6 sec. The number of revolutions made is nearly equal to______________? |
| A. | 25 |
| B. | 50 |
| C. | 100 |
| D. | 250 |
| E. | 500 |
| Answer» C. 100 | |
| 126. |
A body of weight W on inclined plane of a being pulled up by a horizontal force P will be on the point of motion up the plane when P is equal to___________________? |
| A. | W |
| B. | W sin (a + $) |
| C. | Wtan(a + <|)) |
| D. | Wan(a-) |
| Answer» D. Wan(a-) | |
| 127. |
A body moves, from rest with a constant acceleration of 5 m per sec. The distance covered in 5 sec is most nearly________________? |
| A. | 38 m |
| B. | 62.5 m |
| C. | 96 m |
| D. | 124 m |
| Answer» C. 96 m | |
| 128. |
Fatigue test is carried out for |
| A. | stresses varying between two limits of equal value, but of opposite sign |
| B. | stresses varying between two limits of unequal value, but of opposite sign |
| C. | stresses varying between two limits of unequal value but of same sign |
| D. | all of the above |
| Answer» E. | |
| 129. |
The factor of safety is always more than unity. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 130. |
The ductility of a material __________ with the increase in percentage reduction in area of a specimen under tensile test. |
| A. | increases |
| B. | decreases |
| C. | remains same |
| Answer» B. decreases | |
| 131. |
The ductility of the material __________ with the decrease in percentage elongation of a specimen under tensile test. |
| A. | increases |
| B. | decreases |
| C. | remains same |
| Answer» C. remains same | |
| 132. |
In the below figure, curve D represents mild steel. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 133. |
In the below figure, curve C represents soft brass. |
| A. | True |
| B. | False |
| Answer» C. | |
| 134. |
In a stress-strain diagram as shown in the below figure, the curve A represents |
| A. | mild steel |
| B. | soft brass |
| C. | low carbon steel |
| D. | cold rolled steel |
| Answer» C. low carbon steel | |
| 135. |
If percentage reduction in area of a certain specimen made of material 'A' under tensile test is 60% and the percentage reduction in area of a specimen with same dimensions made of material 'B' is 40%, then |
| A. | the material A is more ductile than material B |
| B. | the material B is more ductile than material A |
| C. | the ductility of material A and B is equal |
| D. | the material A is brittle and material B is ductile |
| Answer» B. the material B is more ductile than material A | |
| 136. |
In the below figure, __________ represents glass. |
| A. | curve A |
| B. | curve B |
| C. | curve C |
| D. | curve D |
| Answer» D. curve D | |
| 137. |
If percentage elongation of a certain specimen made of a material 'A' under tensile test is 30% and the percentage elongation of a specimen with same dimensions made of another material 'B' is 40%, then material 'B' is more ductile than material 'A'. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 138. |
The compressive strength of brittle materials is __________ its tensile strength. |
| A. | equal to |
| B. | less than |
| C. | greater than |
| Answer» D. | |
| 139. |
The tensile test is carried on __________ materials. |
| A. | ductile |
| B. | brittle |
| C. | malleable |
| D. | plastic |
| Answer» B. brittle | |
| 140. |
The tensile strength of ductile materials is __________ its compressive strength. |
| A. | equal to |
| B. | less than |
| C. | greater than |
| Answer» D. | |
| 141. |
The compression test is carried on __________ materials. |
| A. | ductile |
| B. | brittle |
| C. | malleable |
| D. | plastic |
| Answer» C. malleable | |
| 142. |
The ratio of the largest load in a test to the original cross-sectional area of the test piece is called |
| A. | elastic limit |
| B. | yield stress |
| C. | ultimate stress |
| D. | breaking stress |
| Answer» D. breaking stress | |
| 143. |
When a material is loaded within elastic limit, the material will regain its shape and size when the load is removed. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 144. |
The breaking stress is __________ the ultimate stress. |
| A. | equal to |
| B. | less than |
| C. | greater than |
| Answer» C. greater than | |
| 145. |
The stress developed in the material without any permanent set is called |
| A. | elastic limit |
| B. | yield stress |
| C. | ultimate stress |
| D. | breaking stress |
| Answer» B. yield stress | |
| 146. |
In a tensile test, when the material is stressed beyond elastic limit, the tensile strain __________ as compared to the stress. |
| A. | decreases slowly |
| B. | increases slowly |
| C. | decreases more quickly |
| D. | increases more quickly |
| Answer» E. | |
| 147. |
In the below figure, the plastic range occurs |
| A. | before point A |
| B. | beyond point A |
| C. | between points A and D |
| D. | between points D and E |
| Answer» C. between points A and D | |
| 148. |
In the below figure, stress is proportional to strain, for the portion |
| A. | from O to A |
| B. | from A to C |
| C. | from A to D |
| D. | from D to E |
| Answer» B. from A to C | |
| 149. |
In the below figure, Hook's law holds good, for the portion from O to A. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 150. |
In the below figure, the stress corresponding to point D is |
| A. | yield point stress |
| B. | breaking stress |
| C. | ultimate stress |
| D. | elastic limit |
| Answer» D. elastic limit | |