Law of Gearing-1

Question 1
Marks : +2 | -2
Pass Ratio : 100%
The gears are termed as medium velocity gears, if their peripheral velocity is
1-3 m/s
3-15 m/s
15-30 m/s
30-50 m/s
Explanation:
The gears having velocity less than 3 m/s are termed as low velocity gears and gears having velocity between 3 and 15 m/s are known as medium velocity gears.
Question 2
Marks : +2 | -2
Pass Ratio : 100%
The size of a gear is usually specified by
pressure angle
circular pitch
diametral pitch
pitch circle diameter
Explanation:
Pitch circle diameter is the diameter of the pitch circle. The size of the gear is usually specified by the pitch circle diameter. It is also known as pitch diameter.
Question 3
Marks : +2 | -2
Pass Ratio : 100%
The radial distance of a tooth from the pitch circle to the bottom of the tooth is called
dedendum
addendum
clearance
working depth
Explanation:
Dedendum is the radial distance of a tooth from the pitch circle to the bottom of the tooth.
Question 4
Marks : +2 | -2
Pass Ratio : 100%
When two non-intersecting and non-coplaner shafts are connected by gears,the arrangement is known as helical gearing.
True
False
Explanation:
The two parallel and co-planar shafts connected by the gears. These gears are called spur gears and the arrangement is known as spur gearing. These gears have teeth parallel to the axis of the wheel. Another name given to the spur gearing is helical gearing.
Question 5
Marks : +2 | -2
Pass Ratio : 100%
The arrangement is called bevel gearing, when two __________ are connected by gears.
tension in the tight side of the belt
tension in the slack side of the belt
sum of the tensions on the tight side and slack side of the belt
average tension of the tight side and slack side of the belt
Explanation:
The two non-parallel or intersecting, but coplanar shafts connected by gears. These gears are called bevel gears and the arrangement is known as bevel gearing.
Question 6
Marks : +2 | -2
Pass Ratio : 100%
The addendum is the radial distance of tooth from the pitch circle to the top of the tooth.
True
False
Explanation:
Dedendum is the radial distance of a tooth from the pitch circle to the bottom of the tooth.
Question 7
Marks : +2 | -2
Pass Ratio : 100%
The working depth of a gear is radical distance from the
pitch circle to the bottom of a tooth
pitch circle to the top of a tooth
top of a tooth to the bottom of a tooth
addendum circle to the clearance circle
Explanation:
Working depth is the radial distance from the addendum circle to the clearance circle. It is equal to the sum of the addendum of the two meshing gears.
Question 8
Marks : +2 | -2
Pass Ratio : 100%
The two parallel and coplaner shafts are connected by gears having teeth parallel to the axis of the shaft. This arrangement is known as
spur gearing
helical gearing
bevel gearing
spiral gearing
Explanation:
The two parallel and co-planar shafts connected by the gears. These gears are called spur gears and the arrangement is known as spur gearing.
Question 9
Marks : +2 | -2
Pass Ratio : 100%
An imaginary circle which by pure rolling action, gives the same motion as the actual gear, is called
addendum circle
dedendum circle
pitch circle
clearance circle
Explanation:
Addendum circle is the circle drawn through the top of the teeth and is concentric with the pitch circle.
Question 10
Marks : +2 | -2
Pass Ratio : 100%
The radial distance from the top of a tooth to the bottom of a tooth in a meshing gear, is called
dedendum
addendum
clearance
working depth
Explanation:
Clearance is the radial distance from the top of the tooth to the bottom of the tooth, in a meshing gear. A circle passing through the top of the meshing gear is known as clearance circle.