ISRO Technician-B Plumber Question Paper - 2019 (Set - 1) with Answer Key

ISRO Technician-B Plumber Question Paper - 2019 (Set - 1) with Answer Key

26) The devices which are used to prevent the escape of foul gases inside or outside the house are called

Answer is:

Traps

27) Among the tools listed below, the ideal tool to tighten an HSH screw is

Answer is:

Allen key

28) An M12 bolt has

Answer is:

ISO metric thread

29) For an M12 x 1.75 bolt with single start thread, how many threads will be engaged if the bolt is inserted through a length of 35 mm?

Answer is:

20

30) For a double-start thread

Answer is:

Lead is twice the pitch

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