SSC JE Civil Engineering 2nd March 2017 Shift-2

5%

10%

15%

20%

Insufficient quantity of water makes the concrete mix harsh

Insufficient quantity of water makes the concrete unworkable

Excess quantity of water makes the concrete segregated

All options are correct

A rich mix of concrete possesses higher strength than that a lean mix of desired workability with excessive quantity of water

The strength of concrete decreases as the water cement ratio increases

If the water cement ratio is less than 0.45, the concrete is not workable and causes honey-combed structure

Good compaction by mechanical vibrations, increases the strength of concrete

The concrete gains strength due to hydration of cement

The concrete cured at a temperature below $$23*\circ$$ C, gains strength up to 28 days

The concrete does not set at freezing point

All options are correct

rapid rate during the first few days and afterwards it continues to increase at a decreased rate

slow rate during the first few days and afterwards it continues to increase at a rapid rate

uniform rate throughout its age

None of these

Higher workability indicates unexpected increase in the moisture content

Higher workability indicates deficiency of sand

If the concrete mix is dry, the slump is zero

All options are correct

10 cm, 20 cm, 30 cm

10 cm, 30 cm, 20 cm

20 cm, 10 cm, 30 cm

20 cm, 30 cm, 10 cm

Segregation is necessary for a workable concrete

Consistency does not affect the workability of concrete

If the slump increases, workability decreases

None of these

100 $$\frac{kg}{cm^{2}}$$

150 $$\frac{kg}{cm^{2}}$$

200 $$\frac{kg}{cm^{2}}$$

250 $$\frac{kg}{cm^{2}}$$

5 $$\frac{kg}{cm^{2}}$$

8 $$\frac{kg}{cm^{2}}$$

10 $$\frac{kg}{cm^{2}}$$

15 $$\frac{kg}{cm^{2}}$$