For continuous drying of grannular or crystalline material, the dryer used is the __________ dryer.

Advantage of continuous drying over batch drying is that the

A

Drying cost per unit weight of dried product is less

B

Product with more uniform moisture content is produced

C

Equipment size required is smaller

D

All of the above

While the thermosetting polymers are amorphous in nature, the thermoplastic polymers are either amorphous or crystalline. The crystalline polymers are characterised by the

A

Low impact strength

B

High flexibility

C

Better finish and surface appearance

D

High plastic deformation

A solid material shows case hardening properties while drying. Which of the following should be controlled to control the drying process?

A

Flow rate of inlet air

B

Relative humidity of outlet air

C

Humidity of inlet air

D

Temperature of the solid

Dryer widely used in a textile industry is __________ dryer.

A

Festoon

B

Cylinder

C

Conveyor

D

Tunnel

Drying of refractory is normally carried out in a __________ dryer.

A

Open pan

B

Tray

C

Rotary vacuum

D

Truck/tunnel

Large scale drying of wheat is done in a __________ dryer.

A

Fluidised bed

B

Spouted bed

C

Tray

D

Vacuum rotary

Large scale drying of sugar is done in a __________ dryer.

A

Spouted bed

B

Tray

C

Rotary

D

Truck

Occurrence of 'case hardening' during drying of a high moisture solid cake __________ the drying rate.

A

Increases

B

Decreases

C

Does not affect

D

Exponentially increases

Which of the following test is used for distinguishing among dry oils, semi-drying oils and non drying oils?

A

Elaiden test

B

Reichart-Meissl value test

C

Henter value test

D

Iodine value test

After taking 30 socks out of the dryer. Dina noticed that the ratio of blue socks to brown socks to black socks was 2 : 3 : 5. How many black socks were in the dryer?

A

21

B

15

C

9

D

6

For continuous drying of grannular or crystalline material, the dryer used is the __________ dryer.

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