When the addenda on pinion and wheel is such that the path of approach and path of recess are half of their maximum possible values, then the length of the path of contact is given by (where r = Pitch circle radius of pinion, R = Pitch circle radius of wheel, and φ = Pressure angle)

Theory of Machine
When the addenda on pinion and wheel is such that the path of approach and path of recess are half of their maximum possible values, then the length of the path of contact is given by (where r = Pitch circle radius of pinion, R = Pitch circle radius of wheel, and φ = Pressure angle)

[(r² + R²) cosφ]/2

[(r + R) sinφ]/2

[(r + R) cosφ]/2

[(r² + R²) sinφ]/2

[(r² + R²) cosφ]/2

[(r + R) sinφ]/2

[(r + R) cosφ]/2

[(r² + R²) sinφ]/2

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Theory of Machine
Which of the following statement is correct for involute gears?

The interference is inherently absent.

A convex flank is always in contact with concave flank.

The variation in centre distance of shafts increases radial force.

The pressure angle is constant throughout the teeth engagement.

The interference is inherently absent.

A convex flank is always in contact with concave flank.

The variation in centre distance of shafts increases radial force.

The pressure angle is constant throughout the teeth engagement.

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Theory of Machine
The partial balancing of reciprocating parts in locomotives produces

All of these

Variation in tractive force along the line of stroke

Hammer blow

Swaying couple

All of these

Variation in tractive force along the line of stroke

Hammer blow

Swaying couple

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Theory of Machine
A shaft has two heavy rotors mounted on it. The transverse natural frequencies, considering each of the rotor separately, are 100 Hz and 200 Hz respectively. The lowest critical speed is

5,367 r.p.m.

6,000 r.p.m.

12,000 r.p.m.

9,360 r.p.m.

5,367 r.p.m.

6,000 r.p.m.

12,000 r.p.m.

9,360 r.p.m.

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Theory of Machine
The type of coupling used to join two shafts whose axes are neither in same straight line nor parallel, but intersect is

Universal coupling

Chain coupling

Oldham's coupling

Flexible coupling

Universal coupling

Chain coupling

Oldham's coupling

Flexible coupling

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Theory of Machine
A single degree of freedom system is given by, m × (d²x/dt²) + c × (dx/dt) + sx = F.cosω.t with usual notations. It represents

Forced vibration with damping

Forced vibration without damping

Free vibration with damping

Free vibration without damping

Forced vibration with damping

Forced vibration without damping

Free vibration with damping

Free vibration without damping

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Theory of Machine

Theory of Machine Which of the following statement is correct for involute gears?

Theory of Machine The partial balancing of reciprocating parts in locomotives produces

Theory of Machine A shaft has two heavy rotors mounted on it. The transverse natural frequencies, considering each of the rotor separately, are 100 Hz and 200 Hz respectively. The lowest critical speed is

Theory of Machine The type of coupling used to join two shafts whose axes are neither in same straight line nor parallel, but intersect is

Theory of Machine A single degree of freedom system is given by, m × (d²x/dt²) + c × (dx/dt) + sx = F.cosω.t with usual notations. It represents

Theory of Machine
Which of the following statement is correct for involute gears?

Theory of Machine
The partial balancing of reciprocating parts in locomotives produces

Theory of Machine
A shaft has two heavy rotors mounted on it. The transverse natural frequencies, considering each of the rotor separately, are 100 Hz and 200 Hz respectively. The lowest critical speed is

Theory of Machine
The type of coupling used to join two shafts whose axes are neither in same straight line nor parallel, but intersect is

Theory of Machine
A single degree of freedom system is given by, m × (d²x/dt²) + c × (dx/dt) + sx = F.cosω.t with usual notations. It represents