THREAD CUTTING - Practice Mode

1) What is the depth of ACME thread of 1inch major diameter 6TPI?

0.08 0.082 0.084 0.09

Correct Answer: 0.084

2) What is the formula to find out core diameter of external thread by using prisms and micrometer?

Core dia = Measurement over prisms ? Height of prisms ? Single depth of thread Core dia = Measurement over prisms ? Height of prisms + Two depth Core dia = Measurement over prisms + Height of prisms ? Single depth Core dia = Measurement over prisms ? Height of prisms + Single depth

Correct Answer: Core dia = Measurement over prisms ? Height of prisms ? Single depth of thread

3) Find the gears for simple gear train, if pitch of lead screw is 6 mm and pitch of thread to be cut is 2 mm?

30/120 50/120 40/120 40/150

Correct Answer: 40/120

4) How much times the spindle rotate the lead screw to cut 3 mm pitch thread in a 12 mm pitch lead screw?

4 times 5 times 6 times 3 times

Correct Answer: 4 times

5) What is the purpose of using taper parallels in thread measurement?

To measure the minor diameter of external thread To measure the minor diameter of internal thread To measure the major diameter of external thread To measure the major diameter of internal thread

Correct Answer: To measure the minor diameter of internal thread

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