Civil engineer objective questions – Structural Analysis and Design (Section-12)

276. The primary compression failure in RCC beam is caused in

a ) under-reinforced beams

b ) balanced beams

c ) over-reinforced beams

d ) all types of beams

277. The secondary compression failure in RCC beam is caused in

a ) under – reinforced beams

b ) balanced beams

c ) over – reinforced beams

d ) all types of beams

278. In a singly reinforced beam , if the concrete is stressed to its allowable limit earlier than steel , the section is said to be

a ) over reinforced section

b ) under reinforced section

c ) balanced section

d ) economical section

279. The types of failure in which stress concrete and steel reaches its permissible value at a time is called balance failure . At this stage location of neutral axis is

a ) above the critical neutral axis

b ) match with critical neutral axis

c ) below the critical neutral axis

d ) all of the above

280. In a RCC beam , if amount of steel increases the depth of N.A.

a ) constant

b ) decreases

c ) increases

d ) none of the above

281. The spiral crack in a beam is developed due to

a ) shear force

b ) bending moment

c ) torsional moment

d ) thrust

282. Spacing of stirrups in a rectangular beam is

a ) kept constant throughout the length

b ) decreased towards the centre of the beam

c ) increased at the ends

d ) increased at the centre of the beam

283. By over reinforcing a beam , the moment of resistance can be increased not more than

a ) 10 %

b ) 15 %

c ) 20 %

d ) 25 %

284. Minimum percentage of tension reinforcement in RCC beams is

a ) 0.85bd/fy

b ) 4

c ) 0.30

d ) 40 Sy/fyd

285. Minimum percentage of shear reinforcement in RCC beams is

a ) 80/fy

b ) 4

c ) .30

d ) 40 Sy/fyd

286. Maximum allowable percentage of tension and compression reinforcement in RCC beams are …….. respectively. 80

a ) 80/fy

b ) 4

c ) .30

d ) 40 Sy/fyd

287. In a RCC cantilever member , main reinforcement is provided at

a ) top fibre

b ) bottom fibre

c ) side fibre

d ) top and bottom fibre

288. In a RCC simply supported member , main reinforcement is provided at

a ) top fibre

b ) bottom fibre

c ) side fibre

d ) top and bottom fibre

289. In a RCC continuous member , main reinforcement is provided at

a ) top fibre

b ) bottom fibre

c ) side fibre

d ) top and bottom fibre

290. Main reinforcements provided in RCC beam is subjected

a ) compression

b ) tension

c ) both of the above

d ) none of the above

291. Main reinforcement in RCC beam is provided to resist

a ) bending moment

b ) shear force

e ) axial force

d ) none of the above

292. Shear reinforcement in RCC beam is provided to resist

a ) bending moment

b ) shear ce

c ) axial force

d ) none of the above

293. Side face reinforcement is provided in a beam when depth of the web in a beam exceeds

a ) 250 mm

b ) 500 mm

c ) 750 m m

d ) 1000 mm 40S

294. The maximum spacing of side face reinforcement in a beam should be

a ) 100 mm

b ) 200 mm

d ) 400 mm

c ) 300 mm

295. Singly reinforced beam & doubly reinforced beam are decided based on

a ) bending moment

b ) shear force

c ) bending moment & shear force

d ) none of the above

296. Doubly reinforced beam is done for

a ) if insufficient load is taken by singly reinforced beam

b ) it is economical

c ) in any case

d ) none of the above

297 . The radius of a bar bend to form a hook , should not be less than

a ) twice the diameter

b ) thrice the diameter

c ) four times the diameter

d ) five times the diameter

298. Lapped splices in tensile reinforcement are generally not used for bars of size larger than

a ) 18 mm diameter

b ) 24 mm diameter

c ) 30 mm diameter

d ) 36 mm diameter

299. Steel bars are generally connected together to get greater length than the standard lengths by providing

a ) straight bar splice

b ) hooked splice

c ) dowel splice

d ) all of the above

300. The length of straight portion hook should be at least of a bar beyond the end of the

a ) four times the diameter

b ) five times the diameter

c ) six times the diameter

d ) seven times the diameter

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