49) B.S.F screw threads are generally used for

Ordinary bolts and nuts

Electrical goods

Lathe lead screw

Vice spindle

Answer is:

Electrical goods

Explanation:

B.S.F screw threads are generally used for Electrical goods.

Thread cutting

Thread chasing

Thread rolling

Tapping

Answer is:

Explanation:

Screw threads are produced without metal removing by a process called as Thread rolling

Pitch diameter

Pitch

Helix angle

Profile

Answer is:

Explanation:

Pitch diameter of screw thread elements is NOT checked with the thread ring gauge.

Width of crest

Minor diameter

Major diameter

Pitch diameter

Answer is:

Used to tap oversized hole

Used to tap holes with slots

The tap tends to push the chips ahead of the tap

Threads formed by displacing the work material

Answer is:

Explanation:

Spiral fluted taps are used to tap holes with slots.