KPSC ITI JTO Fitter Question Papers - 2018 with Answer Key

Bevel protractor: The bevel protractor is a direct angular measuring instrument, and has graduation marked from 0° to 180°. Angles can be measured within an accuracy of 1° using this instrument. 

A simple protractor is a basic device used for measuring angles with a least count of 1° or 60 minutes.

The number of teeth in hacksaw blade used for cutting high carbon steel is 18.

Steel is an alloy of iron with greater than 0.02 % carbon but less than 2%, and cast iron is an alloy of iron containing a even more carbon between 2 and 4%.

Cast iron (usually, but not always) compared to steel has:
Higher damping ability.
Higher thermal capacity.
Higher fragility/ lower toughness.
Higher castability.
Higher stability at higher temperatures.
Lower cost.
Lower machinability.
Lower electric conductivity.
Lower thermal conductivity.
Lower plasticity.
Lower coefficient of friction.
Lower density.

Normalizing involves heating steel to above 50°C above the upper critical temperature, (for hypo-eutectoid steel) and to 50°C above the lower critical temperature (for hyper eutectoid steel). Holding at this temperature for a shorter time to prevent grain growth and finally, cooling in air.