Maximum shrinkage in volume occurring during burning/firing of dried refractories may be as high as __________ percent.

Faster rate of drying of moulded refractories results in high __________ of refractories.

A

Green strength

B

Voids

C

Shrinkage

D

Both B and C

Pure bauxite is the best raw material for the manufacture of high alumina refractories, in which maximum alumina content can be as high as __________ percent.

A

55

B

70

C

80

D

90

Refractories are dried in the

A

Rotary kilns

B

Tunnel kilns

C

Sun

D

None of these

Solution Y is 40 percent sugar by volume and solution X is 20 percent sugar by volume. how many gallons of solution that is 25 percent sugar by volume/

A

75

B

150

C

240

D

450

Solution X is 10% percent alcohol by volume, and solution Y is 30 percent alcohol by volume. How many milliliters of solution Y must be added to 200 milliliters of solution X to create a solution that is 25 percent alcohol by volume?

A

600

B

800

C

300

D

250

E

None of these

Dried milk dried meat are examples of preservation by

A

Pasteurization

B

Dehydration

C

Strerilization

D

None of the above

Shrinkage allowance on pattern is provided to compensate for shrinkage when

A

The temperature of liquid metal drops from pouring to freezing temperature

B

The metal changes from liquid to solid state at freezing temperature

C

The temperature of solid phase drops from freezing to room temperature

D

The temperature of metal drops from pouring to room temperature

If C is creep coefficient, f is original pre-stress in concrete, m is modular ratio, E is Young's modulus of steel and e is shrinkage strain, the combined effect of creep and shrinkage is:

A

(1 - C) mf - eE

B

(C - 1) mf + eE

C

(C - 1) mf - eE

D

(1 - C) mf + eE

Shrinkage allowance on pattern is provided to compensate for shrinkage when the

A

Metal changes from liquid state to solid state at freezing temperature

B

Solid phase temperature drops from freezing temperature to the room temperature

C

Liquid metal temperature drops from pouring temperature to room temperature

D

Liquid metal temperature drops from pouring temperature to freezing temperature

Porosity of fireclay refractories is __________ percent.

A

5-10

B

10-25

C

25-35

D

35-50

Maximum shrinkage in volume occurring during burning/firing of dried refractories may be as high as __________ percent.

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