In low carbon steels, ________ raises the yield point and improves the resistance to atmospheric corrosion.

In low carbon steels, presence of small quantities of sulphur improves

A

Weldability

B

Formability

C

Machinability

D

Hardenability

Steels with high carbon equivalent have poor weldability, because in these steels during welding

A

Carbon and other alloying elements get oxidised from the weld pool

B

Excessive ferrite forms in the heat affected zone leading to poor toughness of the weld

C

Martensite forms in the heat affected zone leading to poor toughness/ductility of the weld

D

Segregation of carbon and other element occurs in the weld pool leading to poor properties of the weld

Low carbon steels are those in which carbon percentage is around

A

0.1 to 0.35

B

0.4 to 0.7

C

0.8 to 1.5

D

1.5 to 2

The process which improves the machinability of steels, but lowers the hardness and tensile strength is

A

Normalising

B

Full annealing

C

Process annealing

D

Spheroidising

The alloy, mainly used for corrosion resistance in stainless steels is

A

Silicon

B

Manganese

C

Carbon

D

Chromium

Presence of small quantity of sulphur in low carbon steel improves its

A

Formability

B

Machinability

C

Weldability

D

Hardenarality

Non-ferrous metals and hard steels do not exhibit a definite yield point, when pulled in the testing machine and hence for these cases, a better measure of their elastic properties is defined by the __________ stress.

A

Ultimate

B

Yield point

C

Proof

D

None of these

Point A is 10 miles West of Point B. Point b is 30 miles North of pint C. Point C is 20 miles East of Point D. What is the distance (in miles) between Point A and Point D?

A

1010

B

1020

C

2010

D

3010

Point A is 10 km west of point B. Point B is 30 km north of point C. Point C is 20 km east of point D. What is the distance between point A and D?

A

1020Km

B

1010Km

C

2010Km

D

3010Km

For hardening alloy steels and high speed steels, they are heated to

A

1100 to 1300°C

B

1300 to 1500°C

C

500 to 600°C

D

700 to 900°C

In low carbon steels, ________ raises the yield point and improves the resistance to atmospheric corrosion.

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