Sand is dried in foundaries in a___drier.

__________ furnace is generally used in the non-ferrous foundaries.

A

Direct arc

B

Indirect arc

C

Resistance

D

Induction

Dried milk dried meat are examples of preservation by

A

Pasteurization

B

Dehydration

C

Strerilization

D

None of the above

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

A

Collapsibility

B

Permeability

C

Cohesiveness

D

Adhesiveness

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

After food has been dried or canned-----for later consumption.

A

it should be stored

B

That it should be stored

C

should be stored

D

which should be stored

Sand is dried in foundaries in a___drier.

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