Question

state two uses of each screw gauge and vernier callipers​

Answer 1

$\huge\bold\red{Answer:-}$

The basic difference between screw gauge and vernier caliper is that screw gauge is used to measure only external measurement while vernier caliper is used to measure external as well as internal measurement. The least count of vernier caliper is 0.01mm while the least count of screw gauge is 0.001 mm.

Answer 2

Answer:

it helps to maintian HIGH precision and accurancy