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541.

Clutch and differential are part of:

A.	Injection system	B.	Power transmission system
C.	PTO drive	D.	None of these

542.

Final drive is a:

A.	Speed increasing unit	B.	Speed reduction unit
C.	Torque increasing unit	D.	Torque reduction unit

543.

Clutch works on principle of:

A.	Friction	B.	Cohesion
C.	Adhesion	D.	All are correct

544.

Highest tractive efficiency occurs in a:

A.	Irrigated soil	B.	Compact and firm soil
C.	Ploughed soil	D.	All are correct

545.

Pain in eardrum starts at a noise level of:

A.	65 dB	B.	95 dB
C.	110 dB	D.	115 dB

546.

Tractor brake test should be carried out at speed of:

A.	15 kmph	B.	20 kmph
C.	25 kmph	D.	All are correct

547.

Range of pressure angle in spur gear is:

A.	5?8	B.	5?12
C.	14?20	D.	20?25

548.

Cold spark plug is used in:

A.	IC engine	B.	CI engine
C.	Light duty engine	D.	Heavy duty engine

549.

Valve timing diagram is a function of:

A.	Torque	B.	Engine speed
C.	Air fuel ratio	D.	All are correct

550.

In a tractor centre of gravity is located at:

A.	1/3 of wheelbase ahead of rear axle	B.	2/3 of wheelbase ahead of rear axle
C.	1/4 of wheelbase ahead of rear axle	D.	All are correct