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MCQOPTIONS
This section includes 251 Mcqs, each offering curated multiple-choice questions to sharpen your Civil Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
Efficiency of a riveted joint is defined as the ratio of |
| A. | least strength of a riveted joint to the strength of solid plate |
| B. | greatest strength of a riveted joint to the strength of solid plate |
| C. | least strength of a riveted plate to the greatest strength of the riveted joint |
| D. | all the above. |
| Answer» E. | |
| 152. |
The beams supporting the steps of a stair are generally known as |
| A. | headers |
| B. | trimmers |
| C. | stringers |
| D. | spandrel beams. |
| Answer» D. spandrel beams. | |
| 153. |
In a built up section carrying a tensile force, the flanges of two channels are turned outward |
| A. | to simplify the transverse connections |
| B. | to minimise lacing |
| C. | to have greater lateral rigidity |
| D. | all the above |
| Answer» D. all the above | |
| 154. |
In rolled steel beams, shear force is mostly resisted by |
| A. | web only |
| B. | flanges only |
| C. | web and flanges together |
| D. | none of these. |
| Answer» B. flanges only | |
| 155. |
According to the Unwin's formula, if t is thickness of the plate in mm, the nominal diameter of the rivet, is |
| A. | d = 1.91 t |
| B. | d = 1.91 t2 |
| C. | d = 1.91 t |
| D. | d = 1.91 t |
| Answer» D. d = 1.91 t | |
| 156. |
The minimum pitch of rivet holes of diameter d should not be less than |
| A. | d |
| B. | 1.25 d |
| C. | 1.5 d |
| D. | 2 d |
| Answer» E. | |
| 157. |
A web plate is called unstiffened if the ratio of clear depth to thickness is less than |
| A. | 35 |
| B. | 50 |
| C. | 60 |
| D. | 85 |
| Answer» E. | |
| 158. |
If the area of cross-section of a single angle discontinuous strut is 30 cm2 and allowable working stress corresponding to its slenderness ratio is 625 kg/cm2, the safe load carrying capacity of the member, is |
| A. | 10 tonnes |
| B. | 12 tonnes |
| C. | 15 tonnes |
| D. | 18 tonnes |
| Answer» D. 18 tonnes | |
| 159. |
For a single section used as a tension member, the given area is assumed |
| A. | 20% to 30% in excess of the net area |
| B. | 30% to 40% in excess of the net area |
| C. | 40% to 50% in excess of the net area |
| D. | 50% to 60% in excess of the net area |
| Answer» D. 50% to 60% in excess of the net area | |
| 160. |
The deflection of beams may be decreased by |
| A. | increasing the depth of beam |
| B. | increasing the span |
| C. | decreasing the depth of beam |
| D. | increasing the width of beam |
| Answer» B. increasing the span | |
| 161. |
In double lacing, the thickness t of flat lacing is |
| A. | t < 1/40 th length between inner end rivets |
| B. | t < 1/50 th length between inner end rivets |
| C. | t < 1/60 th length between inner end rivets |
| D. | t < 1/70 th length between inner end rivets |
| Answer» D. t < 1/70 th length between inner end rivets | |
| 162. |
The effective length of a double angle strut with angles placed back to back and connected to both the sides of a gusset plate, by not less than two rivets, is |
| A. | 0.5 L |
| B. | 0.67 L |
| C. | 0.85 L |
| D. | L |
| Answer» D. L | |
| 163. |
The safe working pressure for a spherical vessel 1.5 m diameter and having 1.5 cm thick wall not to exceed tensile stress 50kg/cm2 , is |
| A. | 16 kg/cm2 |
| B. | 18 kg/cm2 |
| C. | 20 kg/cm2 |
| D. | 22 kg/cm2 |
| Answer» D. 22 kg/cm2 | |
| 164. |
For a cantilever beam of length L built-in at the support and restrained against torsion at the free end, the effective projecting length l is |
| A. | l = 0.7L |
| B. | l = 0.75L |
| C. | l = 0.85L |
| D. | l = 0.5L |
| Answer» C. l = 0.85L | |
| 165. |
Effective length of a column effectively held in position and restrained in direction at one end but neither held in position nor restrained in direction at the other end, is |
| A. | L |
| B. | 0.67 L |
| C. | 0.85 L |
| D. | 1.5 L |
| Answer» E. | |
| 166. |
If P is the wind pressure in kg/cm2, v is the velocity in km/hour and K is a constant of proportionality, then |
| A. | P = K/v2 |
| B. | v = K/P2 |
| C. | P = Kv2 |
| D. | P = Kv |
| Answer» D. P = Kv | |
| 167. |
The stress in the wall of a thin cylinder subjected to internal pressure, is |
| A. | hoop compression |
| B. | shear |
| C. | torsional shear |
| D. | hoop tension. |
| Answer» E. | |
| 168. |
The main advantage of a steel member, is : |
| A. | its high strength |
| B. | its gas and water tightness |
| C. | its long service life |
| D. | all the above. |
| Answer» E. | |
| 169. |
Compression members composed of two channels back-to-back and separated by a small distance are connected together by riveting so that the minimum slenderness ratio of each member between the connections, does not exceed |
| A. | 40 |
| B. | 50 |
| C. | 60 |
| D. | 70 |
| Answer» B. 50 | |
| 170. |
If d is the distance between the flange angles, |
| A. | vertical stiffeners are provided in steel plate girders if the web is less than d/85 |
| B. | vertical stiffeners are provided in high tensile steel plate girders if the web is less than d/175 |
| C. | horizontal stiffeners are provided in high tensile girder steel plate if the web is less than d/180 |
| D. | horizontal stiffeners are provided in steel plate girders if the web is less than d/200 |
| Answer» E. | |
| 171. |
In a truss girder of a bridge, a diagonal consists of mild steel flat 4001.S.F. and carries a pull of 80 tonnes. If the grossdiameter of the rivet is 26 mm, the number of rivets required in the splice, is |
| A. | 6 |
| B. | 7 |
| C. | 8 |
| D. | 9 |
| Answer» D. 9 | |
| 172. |
When a large value of radius of gyration is not required |
| A. | channels are placed back to back |
| B. | channel flanges are kept inward |
| C. | channel flanges are kept outward |
| D. | none of these. |
| Answer» C. channel flanges are kept outward | |
| 173. |
Maximum permissible slenderness ratio of compression members which carry dead and superimposed load, is |
| A. | 350 |
| B. | 250 |
| C. | 180 |
| D. | 80 |
| Answer» D. 80 | |
| 174. |
Assuming the values of maximum deviation ΔP and ΔE to be 25% of the computed value of P and E respectively, the minimum value of the factor of safety is |
| A. | 1 |
| B. | 0.67 |
| C. | 1.67 |
| D. | 2.67 |
| Answer» D. 2.67 | |
| 175. |
According to IS : 800-1962 the permissible bending stress in steel slab plates, is |
| A. | 1500 kg/cm2 |
| B. | 1420 kg/cm2 |
| C. | 2125 kg/cm2 |
| D. | 1890 kg/cm2 |
| Answer» E. | |
| 176. |
The strength of a riveted lap joint is equal to its |
| A. | shearing strength |
| B. | bearing strength |
| C. | tearing strength |
| D. | least of (a), (b) and (c) |
| Answer» E. | |
| 177. |
The permissible bearing stress in steel, is |
| A. | 1500 kg/cm2 |
| B. | 1890 kg/cm2 |
| C. | 2025 kg/cm2 |
| D. | 2340 kg/cm2 |
| Answer» C. 2025 kg/cm2 | |
| 178. |
On eccentrically loaded columns, the equivalent axial load may be obtained by |
| A. | adding the axial load, eccentric load, the product of the bending moment due to eccentric load and the appropriate bending factor |
| B. | adding the axial load and eccentric load and subtracting the product of bending moment and appropriate bending factor |
| C. | dividing the sum of axial load and eccentric load by the product of the bending moment and appropirate bending factor |
| D. | none of these. |
| Answer» B. adding the axial load and eccentric load and subtracting the product of bending moment and appropriate bending factor | |
| 179. |
Tacking rivets in tension members, are provided at a pitch in line not exceeding |
| A. | 25 cm |
| B. | 50 cm |
| C. | 75 cm |
| D. | 100 cm |
| Answer» E. | |
| 180. |
Rise of a Jack arch is kept about |
| A. | 1/2 to 1/3 of the span |
| B. | 1/3 to 1/4 of the span |
| C. | 1/4 to 1/8 of the span |
| D. | 1/8 to 1/12 of the span. |
| Answer» E. | |
| 181. |
Water pressure in a 80 cm water main is 10 kg/cm2. The minimum thickness of the metal required for the water main, not to be stressed more than 200 kg/cm2, is |
| A. | 1 cm |
| B. | 1.5 cm |
| C. | 2 cm |
| D. | 2.5 cm |
| Answer» D. 2.5 cm | |
| 182. |
The main assumption of the method of simple design of steel frame work, is : |
| A. | beams are simply supported |
| B. | all connections of beams, girders and trusses are virtually flexible |
| C. | members in compression are subjected to forces applied at appropriate eccentricities |
| D. | all the above. |
| Answer» E. | |
| 183. |
When plates are exposed to weather, tacking rivets are provided at a pitch in line not exceeding (where t is the thickness of the outside plate). |
| A. | 8 t |
| B. | 16 t |
| C. | 24 t |
| D. | 32 t |
| Answer» C. 24 t | |
| 184. |
An imaginary line along which rivets are placed, is known as |
| A. | rivet line |
| B. | scrieve line |
| C. | back line |
| D. | gauge line |
| Answer» E. | |
| 185. |
Factor of safety is the ratio of |
| A. | yield stress to working stress |
| B. | tensile stress to working stress |
| C. | compressive stress to working stress |
| D. | bearing stress to working stress |
| Answer» B. tensile stress to working stress | |
| 186. |
Rolled steel beams are : |
| A. | mainly used to resist bending stress |
| B. | used as independent sections to resist compressive stress |
| C. | used as independent sections to resist tensile stress |
| D. | All the above. |
| Answer» E. | |
| 187. |
A major beam in a building structure, is known as |
| A. | a girder |
| B. | a floor beam |
| C. | a main beam |
| D. | all the above. |
| Answer» E. | |
| 188. |
Bulb angles are used in |
| A. | column building |
| B. | bridge building |
| C. | ship building |
| D. | water tank building. |
| Answer» D. water tank building. | |
| 189. |
If the thickness of a structural member is small as compared to its length and width, it is classified as |
| A. | one dimensional |
| B. | two dimensional |
| C. | three dimensional |
| D. | none of these. |
| Answer» C. three dimensional | |
| 190. |
The spans are considered approximately equal if the longest span does not exceed the shortest span by more than |
| A. | 0.05 |
| B. | 0.1 |
| C. | 0.15 |
| D. | 0.2 |
| Answer» D. 0.2 | |
| 191. |
The allowable stress in axial tension for rolled I-sections and channels, is taken as |
| A. | 1420 kg/cm2 |
| B. | 1500 kg/cm2 |
| C. | 2125 kg/cm2 |
| D. | 1810 kg/cm2 |
| Answer» C. 2125 kg/cm2 | |
| 192. |
Length of an outstanding leg of a vertical stiffener, may be taken equal to |
| A. | th of clear depth of the girder plus 15 mm |
| B. | th of clear depth of the girder plus 20 mm |
| C. | th of clear depth of the girder plus 25 mm |
| D. | th of clear depth of the girder plus 50 mm |
| Answer» D. th of clear depth of the girder plus 50 mm | |
| 193. |
The cross-section of a standard fillet is a triangle whose base angles are |
| A. | 45° and 45° |
| B. | 30° and 60° |
| C. | 40° and 50° |
| D. | 20° and 70° |
| Answer» B. 30¬∞ and 60¬∞ | |
| 194. |
Lug angle is |
| A. | used with single angle member |
| B. | not used with double angle member |
| C. | used with channel member |
| D. | all the above. |
| Answer» E. | |
| 195. |
If d is the distance between the flange angles, the vertical stiffeners in plate girders are spaced not greater than |
| A. | d |
| B. | 1.25 d |
| C. | 1.5 d |
| D. | 1.75 d |
| Answer» D. 1.75 d | |
| 196. |
Outstanding length of a compression member consisting of a channel, is measured as |
| A. | half of the nominal width |
| B. | nominal width of the section |
| C. | from the edge to the first row of rivets |
| D. | none of these. |
| Answer» C. from the edge to the first row of rivets | |
| 197. |
The ratio of longitudinal stress to strain within eiastic limit, is known as |
| A. | modulus of elasticity |
| B. | shear modulus of elasticity |
| C. | bulk modulus of elasticity |
| D. | tangent modulus of elasticity |
| Answer» B. shear modulus of elasticity | |
| 198. |
Tongue plates are provided in a steel girder at |
| A. | the upper flange |
| B. | the lower flange |
| C. | the upper end of the web |
| D. | the lower end of the web |
| Answer» E. | |
| 199. |
A structural member subjected to compressive stress in a direction parallel to its longitudinal axis, is generally known as |
| A. | column |
| B. | stanchion |
| C. | post |
| D. | strut |
| Answer» E. | |
| 200. |
The greatest gauge of long rivets should not exceed (where d is the diameter of the holes). |
| A. | 2 d |
| B. | 4 d |
| C. | 6 d |
| D. | 8 d |
| Answer» E. | |