Friction of a Body Lying on a Rough Inclined Plane

Question 1
Marks : +2 | -2
Pass Ratio : 100%
The distance from a point of a screw to a corresponding point on the next thread, measured parallel to the axis of the screw is the
helix
pitch
lead
none of the mentioned
Explanation:
Pitch is the distance from a point of a screw to a corresponding point on the next thread, measured parallel to the axis of the screw.
Question 2
Marks : +2 | -2
Pass Ratio : 100%
If the threads are cut on the outer surface of a solid rod, these are known as
internal threads
external threads
helix
none of the mentioned
Explanation:
The fastenings have screw threads, which are made by cutting a continuous helical groove on a cylindrical surface. If the threads are cut on the outer surface of a solid rod, these are known as external threads. But if the threads are cut on the internal surface of a hollow rod, these are known as internal threads.
Question 3
Marks : +2 | -2
Pass Ratio : 100%
The nominal diameter of a screw thread is also known as
root diameter
minor diameter
outside diameter
none of the mentioned
Explanation:
The core diameter of a screw thread is also known as inner diameter or root diameter or minor diameter.
Question 4
Marks : +2 | -2
Pass Ratio : 100%
The core diameter of a screw thread is also known as
outside diameter
root diameter
major diameter
none of the mentioned
Explanation:
The core diameter of a screw thread is also known as inner diameter or root diameter or minor diameter.
Question 5
Marks : +2 | -2
Pass Ratio : 100%
If the threads are cut on the internal surface of a hollow rod, these are known as
internal threads
external threads
helix
none of the mentioned
Explanation:
The fastenings have screw threads, which are made by cutting a continuous helical groove on a cylindrical surface. If the threads are cut on the outer surface of a solid rod, these are known as external threads. But if the threads are cut on the internal surface of a hollow rod, these are known as internal threads.
Question 6
Marks : +2 | -2
Pass Ratio : 100%
The lead of a screw is equal to its pitch, it is known as
depth of thread
single threaded screw
lead
none of the mentioned
Explanation:
If the lead of a screw is equal to its pitch, it is known as single threaded screw.
Question 7
Marks : +2 | -2
Pass Ratio : 100%
The distance, a screw thread advances axially in one turn is known as the
helix
pitch
lead
none of the mentioned
Explanation:
Lead is the distance, a screw thread advances axially in one turn.
Question 8
Marks : +2 | -2
Pass Ratio : 100%
The curve traced by a particle, while describing a circular path at a uniform speed and advancing in the axial direction at a uniform rate is known as
internal threads
external threads
helix
none of the mentioned
Explanation:
Helix is the curve traced by a particle, while describing a circular path at a uniform speed and advancing in the axial direction at a uniform rate. In other words, it is the curve traced by a particle while moving along a screw thread.
Question 9
Marks : +2 | -2
Pass Ratio : 100%
If more than one thread is cut in one lead distance of a screw, it is known as
depth of thread
single threaded screw
multi threaded screw
none of the mentioned
Explanation:
If more than one thread is cut in one lead distance of a screw, it is known as multi-threaded screw e.g. in a double threaded screw, two threads are cut in one lead length. In such cases, all the threads run independently along the length of the rod.
Question 10
Marks : +2 | -2
Pass Ratio : 100%
The distance between the top and bottom surfaces of a thread is known as
depth of thread
pitch
lead
none of the mentioned
Explanation:
Depth of thread is the distance between the top and bottom surfaces of a thread (also known as crest and root of a thread).