SCREW THREADS

1. A lap broken above the surface of the work piece, this bracken tap can be removed by using__
A) use of punch B) Use of cutting pliers
C) Use of tap extractor     D) Use of arc welding

2. In which following method is not suitable for removing the broken rap from the work pieces with low melting temperatures such as aluminium, copper etc.
A) tap extractor method
B) use of punch
C) annealing and drilling the tap.
D) Ezy-out method.

The self locking nut have a nylon for) fibre ring insert the internal dia of the ring insert is ..............
A. Smaller man the core dia of the bolt thread
B. Bigger than me core dia of the bolt thread
C. Equal to the core dia of the bolt thread
D. Doable of the core dia of bolt thread

4. The slotted and castle nut with a split pin. The nominal length of the split pin is the distance from
A. Underside of the eye to the end of the short leg
B. Underside of the eye to the end of the big leg.
C. Length of the big end with eyehole
D. Length of the small and big end with eye hole

5. While assembling using bolt and nuts, we use the corroct length of bolt. The nut is passed through mini....................
A. Atleast two threads on the bolt
B. adeast four threads on the bolt
C. atleast five threads on the bolt

D. atleast six threads on the bolt