Civil Engineering - Concrete Structure

Buy GATE - Civil Engineering Practice test pack

Question - 1

As the cube size increases, the strength of concrete

  • A decreases
  • B remains constant
  • C increases
  • D insufficient data

Question - 2

Tensile strength of concrete is measured by

  • A direct tension test in UniversalTesting Machine (UTM)
  • B applying the compressive load along the diameter of cylinder
  • C applying the third point load on a prism
  • D applying the tensile load along the diameter of cylinder

Question - 3

A concrete cube of 15 cm and a cylinder of 150 mm diameter and 300 mm height are tested for compressive strength, the strength of cube compared to cylinder will be

  • A higher
  • B lower
  • C equal
  • D difficult to assess

Question - 4

The ratio of 7 days and 28 days cube strength is

  • A 0.5
  • B 0.6
  • C 0.75
  • D 0.85

Question - 5

Tensile strength of concrete is approximately of ...................... the compressive strength of concrete.

  • A 3 to 7%
  • B 7 to 15%
  • C 15 to 22%
  • D 22 to 25%

Question - 6

The failure strain of concrete under direct compression and under flexure are respectively

  • A (0.0035, 0.0020)
  • B (0.002, 0.0003)
  • C \((\frac{f_ck}{E_c},\frac{0.7\sqrt{f_{ck}}}{E_c})\)
  • D (0.002, 0.0035)

Question - 7

In MIO nominal mix concrete, if the quantity of water used per 50 kg of cement is 40 kg then that used for M15 concrete for same workability will be

  • A <40kg
  • B =40kg
  • C >40kg
  • D cannot asses

Question - 8

The mean strength of the group of four non-overlapping consecutive cubes, for M30 grade concrete should not be less than

  • A 28.3 MPa
  • B 33.aMPa
  • C 30 MPa
  • D 29.5 MPa

Question - 9

The yield strength of a twisted bar as compared to an ordinary bar (mild steel) is nearly

  • A 50% more
  • B 25% more
  • C 50% less
  • D 25% less

Question - 10

Compare to mild steel plain bars, high strength deformed bars are

  • A less ductile but more strong
  • B more ductile but less strong
  • C more ductile and strong
  • D equally ductile and more strong
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next