Question

Question 1 (1 point) Select from the following list the design parameter that apply to two gears in mesh. Pitch Pressure Angle Base Circle N1 N2 addendum

Please answer all the mcqs

Answer 1

Q1) Design parameter that apply to two gear in mesh

Answer -   Pressure angle

Other design parameters that are considered during gear design is Module and No. of teeth.

Q2) Stages required for Gear ratio of 110:1 for spur or helical gears

The maximum gear ratio for spur gears - 7:1

The maximum gear ratio for Helical gears - 10:1

So, 110/7 = 15.71 or 110/10 = 11

So approximately, answer = 12

Q3) The reverted gear train is one in which the input and output shafts on coincident.

It has two shafts and two gear pairs.

Q4) True

The center distance can be given as C = r1 + r2 = (d1 + d2) /2

Where r1 and r 2 are radius of pinion and gears respectively and d1 and d2 are their diameters

P = Diametrical pitch = Z/d

where Z = no of teeth

C = Z1 + Z2 / 2 P

So centre distance is a function of pitch and teeth

Q5) IV - Design parameters for specific pitch

Pressure angle, No of teeth, Power or Torque to be transmitted, Module.

V - constraints

Geometrical constraints

1. Coaxial constrain

2. Face width constrain

   Kinematic Constraints

3. Gear ratio

Strength constraints

4. Beam strength

5. Wear strength