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621.

A part that connects piston with connection rod is:

A.	Piston ring	B.	Gudgen pin
C.	Safety pin	D.	Camshaft

622.

Power tiller operates most satisfactorily with:

A.	Rotary tools	B.	Ploughs
C.	Transport wheel	D.	Harrows

623.

In an adiabatic process system:

A.	Temperture is constant	B.	Pressure is constant
C.	Heat is constant	D.	Volume is constant

624.

Weight transfer of tractor is directly affected by:

A.	Pull	B.	Hitch height
C.	Both (a) & (b)	D.	Wheel base

625.

Compression ratio of diesel engine is:

A.	4;1	B.	6;1
C.	15;1	D.	25;1

626.

Maximum torque in a tractor is generated at:

A.	Rated rpmb	B.	Less than rated rpm
C.	Rated horsepower	D.	Maximum idling

627.

Brake works on principle of:

A.	Friction	B.	Vibration
C.	Sliding	D.	Suction

628.

Soil texture represent the:

A.	Size and proportion of particles making a soil	B.	Arrangement of soil particles
C.	Both (a) & (b)	D.	None of these

629.

Brake fluid used in hydraulic brake is a mixture of:

A.	Glycerin and alcohol	B.	Alcohol and methane
C.	Glycerin and methane	D.	None of these

630.

When brake is applied the kinetic energy of body is converted into:

A.	Electrical energy	B.	Heat energy
C.	Chemical energy	D.	Mechanical energy