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121.

A gear cutter suitable for cutting 42 to 54 teeth will provide correct form

A.	For any gear having teeth anywhere between 42 to 54	B.	For only 42 teeth gear
C.	For only 54 teeth gear	D.	For only 48 teeth gear

122.

A reverted gear train is one is which

A.	The direction of rotation of first and last gear is the same	B.	The firection of rotation of first and the last gear is opposite
C.	The first and last gear are on the same shaft	D.	The first and last gear are essentially on separate but parallel shafts
E.	None of the above

123.

The differential gear in the automobiles is used to

A.	Reduce speed	B.	Assist in changing speed
C.	Provide jerk free movement of vehicle	D.	Provide balancing
E.	Help in turning

124.

The purpose of differential in locmomtive is served by

125.

The efficiency in case of worm gear drives is generally in the range

126.

In case of spur gears the flank of the tooth is

A.	The part of the tooth surface lying below the pitch surface	B.	The curve forming face and flank
C.	The width of the gear tooth measured axially along the pitch surface	D.	The surface of the top of the tooth
E.	Radius that connects in the root circle to the profile of the tooth

127.

The normal at any point of a involute is

A.	Also normal to that circle	B.	Tangent to the circle
C.	Is inclined to the normal to the circle at an angle equal to pressure angle	D.	Is inclined to the tangent to the circle at an angle equal to the pressure angle
E.	None of the above

128.

The locus of a point one the circumference of a circle which rolls without slipping on a fixed straight line, is known as

129.

In case of cross-helical worm the axes of two shafts are

A.	Parallel	B.	Non-parallel
C.	Intersecting	D.	Non-intersecting
E.	Non-parallel-non intersecting

130.

The radial depth of a ger tooth below the pitch circle is