Related Questions

The helix angle for single helical gears ranges from
A 10° to 15°
B 15° to 20°
C 20° to 35°
D 35° to 50°
In helical gears, the distance between similar faces of adjacent teeth along a helix on the pitch cylinders normal to the teeth, is called
A normal pitch
B axial pitch
C diametral pitch
D module
Two advantages of using helical gears rather than spur gears in a transmission system are
A Strength and cost
B Strength and less end thrust
C Noise level and strength
D Noise level and economy
The form factor of a helical gear __________ with the increase in the helix angle.
A Increases
B Decreases
C Remains constant
D None of these
If T is the actual number of teeth on a helical gear and $$\varphi $$ is the helix angle for the teeth, then formative number of teeth is written as
A $${\text{T}}{\sec ^3}\varphi $$
B $${\text{T}}{\sec ^2}\varphi $$
C $$\frac{{\text{T}}}{{{{\sec }^3}\varphi }}$$
D $${\text{Tcosec}}\varphi $$
In worm gears, the angle between the tangent to the pitch helix and an element of the cylinder, is known as
A Helix angle
B Pressure angle
C Pitch lead angle
D None of these
A close coil helical spring when subjected to a moment M having its axis along the axis of the helix
A It is subjected to pure bending
B Its mean diameter will decrease
C Its number of coils will increase
D All the above
In helical gears, the distance parallel to the axis, between similar faces of adjacent teeth, is called
A Normal pitch
B Axial pitch
C Diametral pitch
D Module
In helical gears, the right hand helixes on one gear will mesh __________ helixes on the other gear.
A Right hand
B Left hand
C Both A and B
D None of these
While cutting helical gears on a non-differential gear hobber, the feed change gear ratio is
A Independent of index change gear ratio
B Dependent on speed change gear ratio
C Interrelated to index change gear ratio
D Independent of speed and index change gear ratio

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