Bulking of sand is caused due to

Bulking of sand is maximum if moisture content is about

A

2%

B

4%

C

6%

D

10%

With increase in moisture content, the bulking of sand

A

Increases

B

Decreases

C

First increases to a certain maximum value and then decreases

D

First decreases to a certain minimum value and then increases

The property of sand due to which the sand grains stick together is called

A

Collapsibility

B

Permeability

C

Cohesiveness

D

Adhesiveness

The ratio of sand to gravel in a mixture is 7 : 8 while that between gravel and cement is 6 : 7. What is the ratio of sand to cement in the mixture?

A

49 : 48

B

7 : 7

C

8 : 6\

D

3 : 4

For a loose sand sample and a dense sand sample consolidated to the same effective stress

A

ultimate strength is same and also peak strength is same

B

ultimate strength is different but peak strength is same

C

ultimate strength is same but peak strength of dense sand is greater than that of loose sand

D

ultimate strength is same but peak

If the sand in-situ is in its densest state, then the relative density of sand is

A

zero

B

1

C

between 0 and 1

D

greater than 1

Uniform ramming of sand in green sand moulding process leads to

A

Reduced chance of gas porosity

B

Greater dimensional stability of the casting

C

Uniform flow of molten metal into the mould cavity

D

Less sand expansion type of casting defect

Insufficient washing of sand grains in a rapid sand filter causes

A

Air binding

B

Shrinkage of filtering media

C

Mud balls

D

Expansion of filtering media

The effective size of sand particles used in slow sand filters is

A

0.25 to 0.35 mm

B

0.35 to 0.60 mm

C

0.60 to 1.00 mm

D

1.00 to 1.80 mm

A person travels I2 km due north, then 15 km due east after that I5km due west and then 18 km due south. How far B she from the starting point?

A

6km

B

10km

C

33km

D

60km

Bulking of sand is caused due to

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