The least count of Bevel protractor is

2) The number of teeth in hacksaw blade used for cutting high carbon steel is

Answer is:

18

Explanation:

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

3) In comparison to cast iron, steel is

Answer is:

more ductile and less harder

Explanation:

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.

4) In the normalising process for hypo-eutectoid steel, the steel is heated to a temperature

above upper critical temperature line and cooled outside the furnace

below the lower critical temperature line and cooled outside the furnace

in between the upper and lower temperature line and cooled inside the furnace

above upper critical temperature line and cooled inside the furnace

Answer is:

above upper critical temperature line and cooled outside the furnace

Explanation:

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.

5) Critical cooling rate is

fastest cooling rate that converts 100% austenite to 100% martensite

slowest cooling rate that converts 100% austenite to 100% martensite

slowest cooling rate that converts 100% austenite to 100% pearlite

fastest cooling rate that converts 100% austenite to 100% cementite

Answer is:

slowest cooling rate that converts 100% austenite to 100% martensite

Explanation:

Critical Cooling Rate - The minimum rate of continuous cooling just sufficient to prevent undesired transformations. For steel, the slowest rate at which it can be cooled form above the upper critical temperature to prevent the decomposition of austenite at any temperature above the Ms. The limiting rate at which austenite must be cooled to ensure that a particular type of transformation product is formed.

Critical cooling rate is slowest cooling rate that converts 100% austenite to 100% martensite

For More KPSC ITI JTO Fitter Question Papers - 2018 with Answer Key

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The least count of Bevel protractor is

60 minutes

For More KPSC ITI JTO Fitter Question Papers - 2018 with Answer Key

Related KPSC ITI JTO Fitter Question Papers - 2018 with Answer Key

2) The number of teeth in hacksaw blade used for cutting high carbon steel is

18

3) In comparison to cast iron, steel is

more ductile and less harder

4) In the normalising process for hypo-eutectoid steel, the steel is heated to a temperature

above upper critical temperature line and cooled outside the furnace

5) Critical cooling rate is

slowest cooling rate that converts 100% austenite to 100% martensite

For More KPSC ITI JTO Fitter Question Papers - 2018 with Answer Key