Engineering :: Materials Handling

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The angle of repose for anthracite coal is around

A.	11?	B.	17?
C.	27?	D.	37?

As compared to anthracite coal, the angle of repose for coke will be

A.	more	B.	less
C.	same

The angle of repose depends on

A.	shape of the material	B.	smoothness of the material
C.	degree of fineness of the material	D.	all of the above

Which of the following material has the highest weight/volume ratio?

A.	Charcoal	B.	Coke
C.	Limestone	D.	Barley

Which of the following material has the lowest weight/volume ratio?

A.	Wheat	B.	Oats
C.	Lignite	D.	Charcoal

We know that acid phosphate (damp) adheres to the belt of belt conveyor. Which of the following conveyor will be preferred for conveying this material?

A.	Screw conveyor	B.	Flight conveyor
C.	pneumatic conveyor	D.	Any of the above

Ammonium nitrate is hygroscopic as well as an explosive. Which of the following conveyor can be used for this material?

A.	Flight conveyor	B.	Continuous flow conveyor
C.	Screw conveyor	D.	Any of the above

Arsenic salts are heavy as well as poisonous. Which of the following conveyor is preferred for its handling?

A.	Belt conveyor	B.	Screw conveyor
C.	Flight conveyor	D.	Any of the above

Ash is abrasive as well as dusty. Which conveyor will be preferred for its handling?

A.	Belt conveyor	B.	Flight conveyor
C.	Drag chain conveyor	D.	Screw conveyor

10.

Average weight/volume ration for ash is around

A.	300 kg/m3	B.	600 kg/m3
C.	900 kg/m3	D.	1200 kg/m3