88) In which fit, the tolerance zone of the hole will be below the tolerance zone of the shaft?

Clearance fit

interference fit

transition fit

None of the above

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.

In which fit, the tolerance zone of the hole will be below the tolerance zone of the shaft?

KPSC ITI JTO Fitter Question Papers - 2018 with Answer Key

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89) The carbon content in wrought iron ranges from

0.01% to 0.05%

0.02% to 0.03%

0.03% to 0.04%

0.03% to 0.05%

Answer is:

0.02% to 0.03%

90) The melting temperature of copper is

930 degree celsius

1005 degree celsius

880 degree celsius

1083 degree celsius

Answer is:

1083 degree celsius

91) Spot facing is done

to provide a fine finish to the drilled hole

to enlarge the previously existing hole

to clean the burr from the mouth of drill hole

to make the surface flat so that the bolt can be easily fitted on the head surface

Answer is:

to make the surface flat so that the bolt can be easily fitted on the head surface

Explanation:

Spot facing is a machining operation for producing a flat seat for bolt head, washer or nut at the opening of a drilled hole. The tool is called a spot facer or a spot facing tool.
Spot facing is similar to counter-boring, except that it is shallower. Tools that are used for counter-boring can be used for spot facing as well.