ISRO Technician-B Fitter Question Paper - 2016 (Set

ISRO Technician-B Fitter Question Paper - 2016 (Set - 4) with Answer Key

66) Calculate the tailstock offset in mm for the job details given below using tailstock offset method for taper turning. Big diameter (D) = 36 mm, Small diameter (d) = 32 mm, Length taper (I) = 125 mm, Total length of job (L) = 250 mm

Answer is:

4 mm

67) In a metric thread, what will be the thickness of the thread at pitch diameter?

Answer is:

Half of the pitch

68) A fit designated as 25 H7/p6 is a

Answer is:

Interference fit

Explanation:

Interference Fit Interference fit is defined as the fit established when a negative clearance exists between the sizes of the holes and the shaft. In Interference fit, the minimum permitted diameter of the shaft is larger than the maximum allowable diameter of the hole.

Examples for Interference Fit are: Bearing bushes, small end in the connecting rod.

69) What is the total surface area of cube having each edge of length 20?

Answer is:

2400

70) At room temperature plain carbon steel contains

Answer is:

66) Calculate the tailstock offset in mm for the job details given below using tailstock offset method for taper turning. Big diameter (D) = 36 mm, Small diameter (d) = 32 mm, Length taper (I) = 125 mm, Total length of job (L) = 250 mm

4 mm

67) In a metric thread, what will be the thickness of the thread at pitch diameter?

Half of the pitch

68) A fit designated as 25 H7/p6 is a

Interference fit

69) What is the total surface area of cube having each edge of length 20?

2400

70) At room temperature plain carbon steel contains

All the three