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771.

The lower penetration of disc plough is due to:

A.	Blunt disc	B.	Plough too hight
C.	More tilt angle	D.	All are correct

772.

The uneven furrow formation in disc ploughing is due to:

A.	Disc angle is not uniform	B.	Loose bearing of disc
C.	Hitching defects of disc plough	D.	All are correct

773.

The excessive side drft in disc plough is due to:

A.	Disc angle is not uniform	B.	Loose bearing
C.	Hitching defect	D.	All are correct

774.

In disc harrow, the penetration of disc improves by:

A.	Increasing disc angle	B.	Lowering hitch point
C.	Regulating optimum speed	D.	All are correct

775.

The gang angle of disc harrow is adjusted in the range of:

A.	0-30?	B.	30-60?
C.	60-90?	D.	Above 90?

776.

The width and depth of cut of disc harrow is controlled by:

A.	Weight of the implement	B.	Gang angle mechanism
C.	Diameter of discs	D.	All are correct

777.

The condition of soil that determines the optimum condition for tillage is:

A.	Plastic	B.	Hard
C.	Crumbly	D.	Cemented

778.

The type furrow opener used in zero tillage implement is:

A.	Reversible type	B.	Inverted type
C.	Shoe type	D.	Hoe type

779.

In vertical disc plough, the numbers of disc varies from:

A.	2?12	B.	2?22
C.	2?32	D.	2?42

780.

The shape of furrow cut by indigenous plough is:

A.	V-shape	B.	Rectangular shape
C.	Trapezoidal shape	D.	None of these