Q1:

Consider the following statements

When a metal or alloy is cold worked

1.It is worked below room temperature

2.It is worked below recrystallization temperature.

3.Its hardness & strength increases

4.Its hardness increases but strength does not increases.

Which of these statements are correct?

Q2:

Machines tool guide ways are usually hardness by?

Q3:

Consider the following quenching media?

1.Oil

2.Water

3.Water + NaOH

4.Brine

The correct sequence of these media in order of increasing hardness of steel undergoing heat treat treatment is?

Q4:

Tempering of quenched martensitic steel is necessary to improve

Q5:

The eutectoid of carbon in iron, above lower critical temperature, when cooled, results in?

Q6:

Consider the following statements about medium carbon steel :

1. It can be quench-hardened but not case hardened

2. It cannot be quench-hardened but case hardening can be done.

3. It exhibits distant yield point under tension test.

The correct sequence of these media in order of increasing hardness of steel undergoing heat treatment is?

Q7:

Which one of the following is the process to refine the grain of metal after it has been distorted by hammering or cold working?

Q8:

Consider the following statements in  respect of austenitic steels.

1. Austenitic stainless steels are hardened and strengthened by cold working.

2. Austenitic stainless steel cannot be quenched & tempered.

Which of these statements are correct?

Q9:

Consider the following

1. Water

2. Ice

3. Brine solution

4. Oil

Which of these are used as quenching medium in case of alloy steels?

Q10:

Consider the following statement regarding annealing process.

1. All structural imperfections are removed.

2. The hypo-eutectoid steel is heated to about 50^oC-70^oC below upper critical temperature.

3. Cooling can be done in heat treating furnace by heating it, keeping the metal  in it & turning off furnace till it cools to room temperature.

4. Uniform grain structure is resulted.

Which for these statements are correct?

Q11:

Gibbs phase ratio is given by

F=No. of degree of freedom

C=No. of components

P=No. of phases

Q12:

The correct sequence of element of 18-4-1 HSS tool is-

Q13:

Which is closest  to the purest form of iron?

Q14:

Cupola is used to make?

Q15:

A material to be rolled or beaten into thin sheets has this property?

Q16:

Guide ways of lathe beds are hardened by

Q17:

Babbitt are used for?

Q18:

If steel containing 36% Nickel is called?

Q19:

Cast iron is used for machine beds because of its high?

Q20:

Maximum surface hardness is achieved by?

Q21:

Hardness of steel greatly improves with?

Q22:

In a eutectic system two elements are completely?

Q23:

Pearlite is a combination of?

Q24:

Alloying element which can replace tungsten in high speed steels is?

Q25:

Composition of Monel metal is?

Q26:

Liquid+solid(1) on cooling converting into solid(2) reaction is known as

Q27:

Austenite is a solid solution of carbon in?

Q28:

The essential constituent of a hardened steel is?

Q29:

Cold working of steel is defined as working?

Q30:

What is the interpalner  spacing between (200),(220), (111) planes in an FCC crystal of atomic A?