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Worksheets

Workshop Theory

Total questions: 23

Worksheet time: 19mins

Name
Class
Date
1.

Which of the following is the hardest constituent of steel?

a)

Ledeburite

b)

Austenite

c)

Bainite

d)

Martensite

2.

Iron possesses BCC crystal structure up to (in degree centigrade)?

a)

1539

b)

768

c)

910

d)

1410

3.

Iron possesses BCC crystal structure above (in degree centigrade)?

a)

1539

b)

768

c)

910

d)

1410

4.

Iron possesses FCC crystal structure above (in degree centigrade)?

a)

1539

b)

768

c)

910

d)

1410

5.

Which of the following form of iron is magnetic in nature?

a)

α

b)

δ

c)

γ

d)

λ

6.

High carbon steels austenize at a slower rate than low carbon steels.

a)

True

b)

False

7.

Pearlitic structures with less interlamellar spacing get transformed at a higher rate to austenite.

a)

True

b)

False

8.

The kinetics for austenitic transformation for coarse pearlite is slower than that for fine pearlite.

a)

True

b)

False

9.

The kinetics for austenite transformation of granular pearlite is higher than that for lamellar pearlite.

a)

True

b)

False

10.

Quenched structures transform to austenite at a higher rate than granular pearlite.

a)

True

b)

False

11.

For alloy steels, how does the kinetics of the formation of austenite depend on carbide forming element?

a)

Kinetics in increased in presence of carbide forming elements

b)

Kinetics is slower in presence of carbide forming elements

c)

Kinetics may increase or decrease in presence of carbide forming elements

d)

Carbide forming elements have no effect on the kinetics

12.

In tailstock offset method, the job is held at an angle and the tool moves______ to the axis.

a)

parallel

b)

perpendicular

c)

at 45 degree

d)

none of the mentioned

13.

In tailstock method, the angle at which the axis of rotation of the job is shifted is equal to______ the angle of taper.

a)

half

b)

double

c)

triple

d)

none of the mentioned

14.

In tailstock method, body of the tailstock is made to slide on its base_____ from the operation.

a)

towards

b)

away

c)

either towards or away

d)

none of the mentioned

15.

The form tool should be set parallel to the axis of the work.

a)

true

b)

false

16.

Which type of taper is generally turned in tailstock method?

a)

internal

b)

external

c)

both internal and external

d)

none of the mentioned

17.

Which of the following is not true for tailstock method?

a)

the body of tailstock is shifted on its base to an amount corresponding to the angle of taper

b)

the movement of tailstock is made by a setover screw

c)

accurate setting of the offset is easy

d)

none of the mentioned

18.

Find the value of K. D= 90 mm, d=80 mm, L=1cm.

a)

1

b)

10

c)

100

d)

none of the mentioned

19.

Find the value of d. K=1/10, L= 10 cm, D=65 mm.

a)

45 mm

b)

55 cm

c)

75 mm

d)

none of the mentioned

20.

The mentioned figure indicates_____ Taper is a shape in which diameters of the both ends are different seen in figure

a)

knurling

b)

parting off

c)

taper turning

d)

none of the mentioned

21.

Sketch a typical taper and label the parts.

4 lines
22.

Describe the standard taper used in industry.

4 lines
23.

Elijah is curious about the various operations involved in heat treatment of steel. Can you briefly discuss each of these operations?

4 lines