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ITI
Turner
Turner Set-1
Lathe Operations
24

Lathe Operations MCQ - Turner (Set-1) with Answers

24) Which one of the following statements in respect of thread chasing dial is NOT correct ?

Thread chasing dial is used to catch the thread when threading on lathe

Worm gear of chasing dial engages with the lead screw while thread chasing

Thread chasing dial is an additional part of the lathe carriage

Thread chasing dial stops rotating when the half nut lever is engaged

Answer is:

Thread chasing dial is an additional part of the lathe carriage

Which one of the following statements in respect of thread chasing dial is NOT correct ?

Lathe Operations MCQ - Turner (Set-1) with Answers

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Related Lathe Operations MCQ - Turner (Set-1) with Answers

25) If the pitch to be cut is 2.5 mm and the lathe has 5 mm pitch lead screw, the thread chasing dial has 8 divisions and a 16 teeth worm wheel fitted on it, the engagement of half nut should be

only at one particular position

only at numbered or un-numbered division

at opposite position

anywhere

Answer is:

anywhere

If the pitch to be cut is 2.5 mm and the lathe has 5 mm pitch lead screw, the thread chasing dial has 8 divisions and a 16 teeth worm wheel fitted on it, the engagement of half nut should be

26) Which among the following statements is correct ?

During turning, after giving one depth of cut, the diameter is reduced equal to double the depth

Carbide tipped tool can withstand shock load

When turning bigger diameter job, the rpm is proportionally increased

When turning smaller diameter job, the rpm is proportionally decreased

Answer is:

During turning, after giving one depth of cut, the diameter is reduced equal to double the depth

27) A 24-teeth gear is fixed at stud as driver gear. After completion of first start and before starting of second start, the driver gear should be turned

24 teeth

18 teeth

12 teeth

6 teeth

Answer is:

12 teeth

28) A simple gear train is to be used to cut a thread with a certain pitch. A driver gear with 3 teeth more than that of the calculated value mounted due to non-availability of the required gear from the set. The thread that is cut will have the pitch

More than that required throughout the length

Less than that required throughout the length

Equal to that required throughout the length

More for a certain length and then less for the remaining length

Answer is:

More than that required throughout the length

Lathe Operations MCQ - Turner (Set-1) with Answers

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