McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Civil Engineering .
| 201. |
If the thickness of plate to be connected by a rivet is 16 mm, then suitable size of rivet as per Unwin's formula will be |
| A. | 16 mm |
| B. | 20 mm |
| C. | 24 mm |
| D. | 27 mm |
| Answer» C. 24 mm | |
| 202. |
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» D. all the above | |
| 203. |
Angle of inclination of the lacing bar with the longitudinal axis of the column should preferably be between |
| A. | 10° to 30° |
| B. | 30° to 40° |
| C. | 40° to 70° |
| D. | 90° |
| Answer» C. 40° to 70° | |
| 204. |
In case of cantilever fillers, the ratio of the span L to depth d, should not exceed |
| A. | 4 |
| B. | 8 |
| C. | 12 |
| D. | 16 |
| Answer» C. 12 | |
| 205. |
The internal pressure coefficient on walls for buildings with large permeability is taken as |
| A. | ± 0.2 |
| B. | ±0.5 |
| C. | ± 0.7 |
| D. | 0 |
| Answer» C. ± 0.7 | |
| 206. |
The gross diameter of a rivet is the diameter of |
| A. | cold rivet before driving |
| B. | rivet after driving |
| C. | rivet hole |
| D. | none of these |
| Answer» B. rivet after driving | |
| 207. |
The centrifugal force due to curvature of track is assumed to act on the bridge at a height of |
| A. | 1.23 m above the rail level |
| B. | 1.50 m above the rail level |
| C. | 1.83 m above the rail level |
| D. | 2.13 m above the rail level |
| Answer» C. 1.83 m above the rail level | |
| 208. |
The tensile strength of mild steel for bolts and nuts should not be less than |
| A. | 32 kg/mm2 |
| B. | 36 kg/mm2 |
| C. | 40 kg/mm2 |
| D. | 44 kg/mm2 |
| Answer» D. 44 kg/mm2 | |
| 209. |
Efficiency of a riveted joint, having the minimum pitch as per IS : 800, is |
| A. | 40 % |
| B. | 50 % |
| C. | 60 % |
| D. | 70 % |
| Answer» C. 60 % | |
| 210. |
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» C. t < 1/60 th length between inner end rivets | |
| 211. |
According to IS Specifications, the effective length of a column effectively held in position at both ends and restrained in direction at one end is taken as |
| A. | 0.67 l |
| B. | 0.8 l |
| C. | l |
| D. | 1.5 l |
| Answer» B. 0.8 l | |
| 212. |
If M is the moment due to a couple in a bearing plate whose width is b and allowable bending stress is P, the thickness (t) of the bending plate of the column splice, is |
| A. | t b × p)/6m] |
| B. | t m/(b × p)] |
| C. | t = 6m/bp |
| D. | t m/(b × p) |
| Answer» B. t m/(b × p)] | |
| 213. |
The web crippling due to excessive bearing stress can be avoided by |
| A. | increasing the web thickness |
| B. | providing suitable stiffeners |
| C. | increasing the length of the bearing plates |
| D. | none of the above |
| Answer» C. increasing the length of the bearing plates | |
| 214. |
Allowable working stress corresponding to the slenderness ratio of double angles placed back to back and connected to one side of a gusset plate, is reduced to |
| A. | 50 % |
| B. | 60 % |
| C. | 70 % |
| D. | 80 % |
| Answer» D. 80 % | |
| 215. |
The number of seismic zones in which the country has been divided is |
| A. | 3 |
| B. | 5 |
| C. | 6 |
| D. | 7 |
| Answer» B. 5 | |
| 216. |
Load factor is |
| A. | always equal to factor of safety |
| B. | always less than factor of safety |
| C. | always greater than factor of safety |
| D. | sometimes greater than factor of safety |
| Answer» C. always greater than factor of safety | |
| 217. |
When a tension member is made of four angles with a plate as a web, the allowance for holes is made as |
| A. | two holes for each angle and one hole for the web |
| B. | one hole for each angle and one hole for the web |
| C. | one hole for each angle and two holes for the web |
| D. | two holes for each angle and two holes for the web |
| Answer» C. one hole for each angle and two holes for the web | |
| 218. |
The effective length of a battened column is increased by |
| A. | 5 % |
| B. | 10 % |
| C. | 15 % |
| D. | 20 % |
| Answer» B. 10 % | |
| 219. |
To keep the intensity of bearing pressure between the column base and concrete compressive and to vary from zero to 2P/BL, the ratio of the moment M to the axial load P should be |
| A. | l/2 |
| B. | l/3 |
| C. | l/4 |
| D. | l/6 |
| Answer» D. l/6 | |
| 220. |
The spans are considered approximately equal if the longest span does not exceed the shortest span by more than |
| A. | 5 % |
| B. | 10 % |
| C. | 15 % |
| D. | 20 % |
| Answer» C. 15 % | |
| 221. |
The mechanism method and the statical method give |
| A. | lower and upper bounds respectively on the strength of structure |
| B. | upper and lower bounds respectively on the strength of structure |
| C. | lower bound on the strength of structure |
| D. | upper bound on the strength of structure |
| Answer» B. upper and lower bounds respectively on the strength of structure | |
| 222. |
When two plates are placed end to end and are joined by two cover plates, the joint is known as |
| A. | lap joint |
| B. | butt joint |
| C. | chain riveted lap joint |
| D. | double cover butt joint |
| Answer» D. double cover butt joint | |
| 223. |
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» D. least of (a), (b) and (c) | |
| 224. |
Number of rivets required in a joint, is |
| A. | load/shear strength of a rivet |
| B. | load/bearing strength of a rivet |
| C. | load/tearing strength of a rivet |
| D. | load/rivet value |
| Answer» D. load/rivet value | |
| 225. |
If the loaded length of span in meters of a railway steel bridge carrying a single track is 6 m, then impact factor is taken as |
| A. | 0 |
| B. | 0.5 |
| C. | between 0.5 and 1.0 |
| D. | 1.0 |
| Answer» C. between 0.5 and 1.0 | |
| 226. |
A riveted joint many experience |
| A. | tearing failure of plates |
| B. | splitting failure of plates at the edges |
| C. | bearing failure of rivets |
| D. | all the above |
| Answer» D. all the above | |
| 227. |
Diameter of a bolt hole is usually taken as |
| A. | gross diameter of bolt |
| B. | nominal diameter + 1.5 mm |
| C. | nominal diameter + 2.0 mm |
| D. | nominal diameter of bolt |
| Answer» B. nominal diameter + 1.5 mm | |
| 228. |
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. | 2 l |
| Answer» C. 0.85 l | |
| 229. |
The range of economical spacing of trusses varies from |
| A. | l/3 to l/5 |
| B. | l/4 to 2l/5 |
| C. | l/3 to l/2 |
| D. | 2l/5 to 3l/5, where l is span |
| Answer» A. l/3 to l/5 | |
| 230. |
Effective sectional area of a compression member is: |
| A. | gross sectional area - area of rivet hole |
| B. | gross sectional area + area of rivet hole |
| C. | gross sectional area × area of rivet hole |
| D. | gross sectional area + area of rivet hole |
| Answer» A. gross sectional area - area of rivet hole | |
| 231. |
The maximum slenderness ratio of a steel column, the design of which is governed by wind or seismic forces is |
| A. | 150 |
| B. | 180 |
| C. | 250 |
| D. | 350 |
| Answer» C. 250 | |
| 232. |
In plastic analysis, the shape factor for circular sections, is |
| A. | 1.5 |
| B. | 1.6 |
| C. | 1.697 |
| D. | none of these |
| Answer» C. 1.697 | |
| 233. |
The external wind pressure acting on a roof depends on |
| A. | degree of permeability of roof |
| B. | slope of roof |
| C. | both (a) and (b) |
| D. | none of the above |
| Answer» B. slope of roof | |
| 234. |
The failure of a web plate takes place by yielding if the ratio of the clear depth to thickness of the web, is less than |
| A. | 45 |
| B. | 55 |
| C. | 62 |
| D. | 82 |
| Answer» D. 82 | |
| 235. |
The actual thickness of butt weld as compared to the thickness of plate is usually |
| A. | more |
| B. | less |
| C. | equal |
| D. | none of the above |
| Answer» A. more | |
| 236. |
The ratio of longitudinal stress to strain within elastic limit, is known as |
| A. | modulus of elasticity |
| B. | shear modulus of elasticity |
| C. | bulk modulus of elasticity |
| D. | all the above |
| Answer» A. modulus of elasticity | |
| 237. |
The slenderness ratio of lacing bars should not exceed |
| A. | 100 |
| B. | 120 |
| C. | 145 |
| D. | 180 |
| Answer» C. 145 | |
| 238. |
In a fillet weld placed on the sides of the base, the metal experiences |
| A. | shear |
| B. | tension |
| C. | compression |
| D. | all the above |
| Answer» D. all the above | |
| 239. |
For steel members not exposed to weather, the thickness of steel should not be less than |
| A. | 4.5 mm |
| B. | 6 mm |
| C. | 8 mm |
| D. | 10 mm |
| Answer» B. 6 mm | |
| 240. |
When a tension member consists of two channel sections, the allowance for rivet hole is made for two holes from |
| A. | each web |
| B. | each flange |
| C. | each web or one hole from each flange whichever is more |
| D. | each web or one hole from each flange whichever is less |
| Answer» D. each web or one hole from each flange whichever is less | |
| 241. |
If a pair of angles placed back to back in tension are connected by one leg of each angle, the net effective area of the section, is |
| A. | a - [b/{1 + 0.35 (b/a)}] |
| B. | a + [b/{1 + 0.35 (b/a)}] |
| C. | a - [b/{1 + 0.2 (b/a)}] |
| D. | a + [b/{1 + 0.2 (b/a)}] |
| Answer» D. a + [b/{1 + 0.2 (b/a)}] | |
| 242. |
P E to be 25% of the computed value of P and E respectively, the minimum value of the factor of safety is |
| A. | 1.00 |
| B. | 0.67 |
| C. | 1.67 |
| D. | 2.67 |
| Answer» C. 1.67 | |
| 243. |
A beam is defined as a structural member subjected to |
| A. | axial loading |
| B. | transverse loading |
| C. | axial and transverse loading |
| D. | none of these |
| Answer» B. transverse loading | |
| 244. |
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» B. 1500 kg/cm2 | |
| 245. |
Secant formula for direct stress in compression, is applicable only for slenderness ratio upto |
| A. | 120 |
| B. | 130 |
| C. | 140 |
| D. | 150 |
| Answer» C. 140 | |
| 246. |
A compression member consisting of angle sections may be a |
| A. | continuous member |
| B. | discontinuous single angle strut |
| C. | discontinuous double angle strut |
| D. | all the above |
| Answer» D. all the above | |
| 247. |
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» D. all the above | |
| 248. |
A riveted joint may experience |
| A. | shear failure |
| B. | shear failure of plates |
| C. | bearing failure |
| D. | all the above |
| Answer» D. all the above | |
| 249. |
IS : 800 - 1971 recommends that in a splice plate the number of rivets carrying calculated shear stress through a packing greater than 6 mm thick, is to be increased by 2.5% for every |
| A. | 1.00 mm thickness of packing |
| B. | 1.50 mm thickness of packing |
| C. | 2.0 mm thickness of packing |
| D. | 2.50 mm thickness of packing |
| Answer» C. 2.0 mm thickness of packing | |
| 250. |
To the calculated area of cover plates of a built-up beam, an allowance for rivet holes to be added, is |
| A. | 10 % |
| B. | 13 % |
| C. | 15 % |
| D. | 18 % |
| Answer» B. 13 % | |
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