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661.

The permissible slip for wheel type tyre during slippage testing is:

A.	3 to 5%	B.	7 to 10%
C.	15 to 20%	D.	20 to 30%

662.

The permissible slip for crawler tractor during slippage testing is:

A.	3 to 5%	B.	7 to 10%
C.	15 to 20%	D.	20 to 30%

663.

Traction can be be increased by:

A.	Rubber tyre with grooves	B.	Placing chain
C.	Putting Luigs	D.	All are correct

664.

The operation to perform to open any cultivable land is:

A.	Primary tillage	B.	Secondary tillage
C.	Minimum tillage	D.	Reduced tillage

665.

Finer operation performed for seedbed preparation is:

A.	Primary tillage	B.	Secondary tillage
C.	Strip tillage	D.	Rotary tillage

666.

Indigenous plough is:

A.	Primary tillage tool	B.	Secondary tillage tool
C.	Multi-purpose tool	D.	All are correct

667.

Of the following, which are the primary tillage implements?

A.	Chisel plough and disc harrow	B.	Chisel plough and subsoiler
C.	Disc plough and disc harrow	D.	Leveler and clod crusher

668.

A cultivar wholw tynes swings back when obstacle encounter is:

A.	Spike tooth cultivator	B.	Spring type cultivator
C.	Rigid type cultivator	D.	All are correct

669.

A bullock drawn implement has:

A.	Higher speed and higher working capacity	B.	Lower speed and lower working capacity
C.	Higher speed and lower working capacity	D.	Lower speed and higher working capacity

670.

Tractor drawn implements have:

A.	High speed and higher working capacity	B.	Lower speed and lower working capacity
C.	Higher speed and lower working capacity	D.	Lower speed and higher working capacity