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WorksheetsWorkshop Theory
Total questions: 23
Worksheet time: 19mins
Which of the following is the hardest constituent of steel?
Ledeburite
Austenite
Bainite
Martensite
Iron possesses BCC crystal structure up to (in degree centigrade)?
1539
768
910
1410
Iron possesses BCC crystal structure above (in degree centigrade)?
1539
768
910
1410
Iron possesses FCC crystal structure above (in degree centigrade)?
1539
768
910
1410
Which of the following form of iron is magnetic in nature?
α
δ
γ
λ
High carbon steels austenize at a slower rate than low carbon steels.
True
False
Pearlitic structures with less interlamellar spacing get transformed at a higher rate to austenite.
True
False
The kinetics for austenitic transformation for coarse pearlite is slower than that for fine pearlite.
True
False
The kinetics for austenite transformation of granular pearlite is higher than that for lamellar pearlite.
True
False
Quenched structures transform to austenite at a higher rate than granular pearlite.
True
False
For alloy steels, how does the kinetics of the formation of austenite depend on carbide forming element?
Kinetics in increased in presence of carbide forming elements
Kinetics is slower in presence of carbide forming elements
Kinetics may increase or decrease in presence of carbide forming elements
Carbide forming elements have no effect on the kinetics
In tailstock offset method, the job is held at an angle and the tool moves______ to the axis.
parallel
perpendicular
at 45 degree
none of the mentioned
In tailstock method, the angle at which the axis of rotation of the job is shifted is equal to______ the angle of taper.
half
double
triple
none of the mentioned
In tailstock method, body of the tailstock is made to slide on its base_____ from the operation.
towards
away
either towards or away
none of the mentioned
The form tool should be set parallel to the axis of the work.
true
false
Which type of taper is generally turned in tailstock method?
internal
external
both internal and external
none of the mentioned
Which of the following is not true for tailstock method?
the body of tailstock is shifted on its base to an amount corresponding to the angle of taper
the movement of tailstock is made by a setover screw
accurate setting of the offset is easy
none of the mentioned
Find the value of K. D= 90 mm, d=80 mm, L=1cm.
1
10
100
none of the mentioned
Find the value of d. K=1/10, L= 10 cm, D=65 mm.
45 mm
55 cm
75 mm
none of the mentioned
The mentioned figure indicates_____ Taper is a shape in which diameters of the both ends are different seen in figure
knurling
parting off
taper turning
none of the mentioned
Sketch a typical taper and label the parts.
Describe the standard taper used in industry.
Elijah is curious about the various operations involved in heat treatment of steel. Can you briefly discuss each of these operations?
