11) In the thread designation 'M12 x 1.25', 'M' specifies

Metallic thread

Man made thread

Constant pitch thread

ISO metric thread

Answer is:

ISO metric thread

ISRO Technician-B Machinist Question Paper - 2016 (Set -1) with Answer Key

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12) A fastener is designated as M5 x 0.8. If the length of the threaded portion is 4 mm, the number of threads available is

3.2

0.8

Answer is:

5

13) Balls or rollers are used for precision measurement because

They are precision finished

They provide line or point contract

They are easy for handling

They can be produced easily

Answer is:

They provide line or point contract

14) Coating on a carbide tool increases

Surface protection

Wear resistance

tool life

all of the above

Answer is:

all of the above

15) Cast iron is an example for

Ductile material

Brittle material

High strength material

None of the above

Answer is:

Brittle material

Explanation:

Brittleness
Brittleness is a property of material which breaks with little or no deformation.

ISRO Technician-B Machinist Question Paper - 2016 (Set -1) with Answer Key

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11) In the thread designation 'M12 x 1.25', 'M' specifies

ISO metric thread

ISRO Technician-B Machinist Question Paper - 2016 (Set -1) with Answer Key

Related ISRO Technician-B Machinist Question Paper - 2016 (Set -1) with Answer Key

12) A fastener is designated as M5 x 0.8. If the length of the threaded portion is 4 mm, the number of threads available is

5

13) Balls or rollers are used for precision measurement because

They provide line or point contract

14) Coating on a carbide tool increases

all of the above

15) Cast iron is an example for

Brittle material

ISRO Technician-B Machinist Question Paper - 2016 (Set -1) with Answer Key