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Course=rcc .IS 456, STRUCTURAL ENGINEERING. CIVIL ENGG      Subject=rcc IS 456

Question no-1
min. grade of concrete use for RCC work


Optional Answers

(a)                  M20

(b)                  M15

(c)                  M25

(d)                  M30

(e)                  M10

(f)                  none of these

Sollution

(a)                  M20

Question no-2
min. grade of concrete use for water tank


Optional Answers

(a)                  M20

(b)                  M 25

(c)                  M40

(d)                  M30

(e)                  M15

(f)                  NONE OF THESE

Sollution

(d)                  M30

Question no-3
IN A RCC SLAB 10MM DIA BAR AT SPACING IS 200, IF WE WILL USE 8 MM BAR THEN SPACING WILL BE


Optional Answers

(a)                  200

(b)                  220

(c)                  240

(d)                  250

(e)                  280

(f)                  NONE OF THESE

Sollution

(f)                  NONE OF THESE

Question no-4
500√Fck is proportional to


Optional Answers

(a)                  Ec

(b)                  Fcr

(c)                  creep

(d)                  srinkage

Sollution

(a)                  Ec

Question no-5
0.7√Fck is proportional to


Optional Answers

(a)                  Ec

(b)                  Fcr

(c)                  creep

(d)                  srinkage

Sollution

(b)                  Fcr

Question no-6
The maximum area of tension reinforcement in beams shall not exceed in %


Optional Answers

(a)                  2

(b)                  3

(c)                  4

(d)                  5

(e)                  6

(f)                  none of these

Sollution

(c)                  4

Question no-7
As per I.S. 456 - 1978, the pH value of water shall be


Optional Answers

(a)                  less than 6

(b)                  equal to 6

(c)                  not less than 6

(d)                  equal to 7

Sollution

(c)                  not less than 6

Question no-8
The minimum number of main steel bars provided in R.C.C


Optional Answers

(a)                  rectangular columns is 4

(b)                  circular columns is 6

(c)                  octagonal columns is 8

(d)                  all the above

Sollution

(d)                  all the above

Question no-9
An R.C.C. column is treated as long if its slenderness ratio is greater than


Optional Answers

(a)                  45

(b)                  50

(c)                  55

(d)                  60

(e)                  65

(f)                  70

Sollution

(b)                  50

Question no-10


Cantilever retaining walls can safely be used for a height not more than


Optional Answers

(a)                  6

(b)                  7

(c)                  8

(d)                  9

(e)                  10

(f)                  5

Sollution

(a)                  6

Question no-11
min cover for slab in mm


Optional Answers

(a)                  15

(b)                  25

(c)                  40

(d)                  75

(e)                  none of these

Sollution

(a)                  15

Question no-12
min cover for beam in mm


Optional Answers

(a)                  15

(b)                  25

(c)                  40

(d)                  75

(e)                  none of these

Sollution

(b)                  25

Question no-13
min cover for column in mm


Optional Answers

(a)                  20

(b)                  30

(c)                  40

(d)                  50

(e)                  none of these

Sollution

(c)                  40

Question no-14
min cover for footing in mm


Optional Answers

(a)                  40

(b)                  50

(c)                  60

(d)                  75

(e)                  none of these

Sollution

(d)                  75

Question no-15
effective length of column when both ends are fixed


Optional Answers

(a)                  L

(b)                  2L

(c)                  0.5L

(d)                  L/√2

(e)                  none of these

Sollution

(c)                  0.5L

Question no-16
The diameter of longitudinal bars of a column should never be less than


Optional Answers

(a)                  6

(b)                  8

(c)                  10

(d)                  12

(e)                  NONE OF THESE

Sollution

(d)                  12

Question no-17
Thickened part of a flat slab over its supporting column, is technically known as


Optional Answers

(a)                  drop panel

(b)                  capital

(c)                  column head

(d)                  none of these

Sollution

(a)                  drop panel

Question no-18
The effective span of a simply supported slab, is


Optional Answers

(a)                  distance between the centres of the bearings

(b)                  clear distance between the inner faces of the walls plus twice the thickness of the wall

(c)                   clear span plus effective depth of the slab

(d)                  none of these.

Sollution

(b)                  clear distance between the inner faces of the walls plus twice the thickness of the wall

Question no-19

The minimum cube strength of concrete used for a prestressed member, is M


Optional Answers

(a)                  25

(b)                  30

(c)                  40

(d)                  45

(e)                  20

(f)                  35

Sollution

(f)                  35

Question no-20
A foundation rests on


Optional Answers

(a)                  base of the foundation

(b)                  subgrade

(c)                  foundation soil

(d)                  both (b) and (c)

Sollution

(d)                  both (b) and (c)

Question no-21


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Question no-22


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Question no-23


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Question no-24


Optional Answers

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Question no-25


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Question no-26


Optional Answers

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Question no-27


Optional Answers

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Question no-28


Optional Answers

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Question no-29


Optional Answers

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Question no-30


Optional Answers

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