Mechanics of Textile Machinery (MCQ : MODULE 4- Spur gears )

Question 1: The unit of diametral pitch is

Inch
cm
Inch -1
None of the above

Question 2: Module of a spur gear is defined as

Ratio of number of teeth to the pitch circle diameter
Ratio of pitch circle diameter to the number of teeth
Inverse of number of teeth

Question 3: Circular pitch is defined as

Sum of thickness of a tooth and the space between two adjacent teeth measured on base circle
Ratio of circumference of pitch circle to number of teeth
Inverse of module
Clearance

Question 4: The depth of a tooth in a spur gear is

Difference between the dedendum and addendum
None of the above

Question 5: Line of action is

Tangent to tooth surface and normal to base circle
Normal to tooth surface and tangent to pitch circle
Normal to the tooth surface and tangent to base circle
Tangent to tooth surface and normal to pitch circle

Question 6: Pressure angle is the angle between

Pressure line and common normal to pitch circles of meshing gears
Pressure line and common tangent to pitch circles of meshing gears
Pressure line and common tangent to base circles of meshing gears
Pressure line and common tangent to addendum circles of meshing gears

Question 7: Radius of base circle is a product of

Radius of dedendum circle and cosine of pressure angle
Clearance and cosine of pressure angle
Radius of pitch circle and cosine of pressure angle

Question 8: Interference in drafting gears in drawing machine generates

Neps in yarn
Thick places in yarn
Periodic waves in yarn
Quasi-periodic waves in yarns

Question 9: In a rack and pinion, the pitch circle diameter and the number of teeth on the pinion are 10cm and 58 respectively. The pressure angle is 22.5 °. Calculate the base pitch of the rack.

8.42 mm
16.83 mm
29.03 mm
33.67 mm

Question 10: When face width of gear is too large

Gear will have poor capacity to absorb shock loads
There will be a possibility of concentration of load at one end of gear tooth
There will be problem in lubricating the gear
None of the above

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