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1421.

Rietz mill is applicable for milling:

A.	Dry material	B.	Semi-dry material
C.	Wet material	D.	All are correct

1422.

Rietz mill suitable for grinding material below is of:

A.	15 micron size	B.	20 micron size
C.	25 micron size	D.	30 micron size

1423.

Rotor diameter of Rietz mill ranges from:

A.	5-10 cm	B.	10-60 cm
C.	15-70 cm	D.	20-80 cm

1424.

Centrifugal sheller is used for milling:

A.	Paddy	B.	Wheat
C.	Pulses	D.	Oilseeds

1425.

The speed of hammer tip of a Rietz mill varies from:

A.	4.5-80m/s	B.	5.2-111 m/s
C.	10-150m/s	D.	12-160m/s

1426.

Colloid mill is used for:

A.	Puree making	B.	Food pastes formation
C.	Pulp formation	D.	All are correct

1427.

In oil extraction unit, the most commonly used solvent is:

A.	n-hexane	B.	n-heptane
C.	Nepthene	D.	All are correct

1428.

The boiling point of n-hexane is about:

A.	60?C	B.	65.5?C
C.	75.5?C	D.	90?C

1429.

Percentage of husk in paddy is about:

A.	15-18 per cent	B.	18-22 per cent
C.	20-24 per cent	D.	25-30 per cent

1430.

Percentage of bran in therice is:

A.	2-4%	B.	4-6%
C.	6-8%	D.	8-10%