143) Related to Pearlite which of the following is not TRUE? #GATE2022
Anonymous Quiz
12%
Pearlite transformation is diffusional process.
24%
Pearlite can be easily resolved in Optical Microscope
42%
In Pearlite Cementite layer is wider than ferrite
21%
Pearlite Transformation occurs for steels below the AC1 temperature by Eutectoid reaction.
144) What is the degree of freedom for a system comprising liquid water equilibrium with its vapour? #GATE2022
Anonymous Quiz
34%
0
29%
1
31%
2
6%
3
145) The power of a quenching medium is indicated by which of following parameter?
Anonymous Quiz
13%
Thermal Conductivity of material in which quenching medium is used.
55%
Heat transfer coefficient between material and the medium
24%
Severity of quench
8%
None of these
146) What are the raw materials for iron making in Blast Furnace?
Anonymous Quiz
15%
Iron ore and Coke
40%
Iron ore, Sinter,Metallurgical Coal,Limestone and hot blast
32%
Iron ore,Coke,limestone
13%
Iron ore,Sinter,coke, limestone and hot blast
147) Ball mill is used for.......
Anonymous Quiz
14%
Coarse Grinding
42%
Crushing
37%
Fine Grinding
8%
For concentration
148) Sprue designing in a Gating system is based on the principle of..........
Anonymous Quiz
13%
Bernoulli's Theorem
28%
Continuity Equation
46%
Both option a & b
12%
Pascal's law
149) During Solidification of steels, Killed steels are...........
Anonymous Quiz
22%
Fully oxidized
19%
Partially oxidized
44%
Fully deoxidized
15%
Partially deoxidized
150) True stress - true strain curve is also known as flow curve because it represents.......
Anonymous Quiz
29%
basic elastic flow characteristic of the material
32%
basic yield flow characteristic of the material
27%
basic plastic flow characteristic of the material
13%
basic fracture flow characteristic of the material
151) Which of the following option does not contain only HCP crystal structure?
Anonymous Quiz
13%
alpha Titanium,Zirconium,
29%
Magnesium, Zinc, Gold
42%
Cadmium, Beryllium
16%
Cobalt,Hafnium, Osmium
152) Which of the following related to crystal Structures is not TRUE?
Anonymous Quiz
12%
HCP&FCC crystal structure has same atomic packing factor
45%
Simple cubic crystal Structure has less effective number of atoms than BCC crystal structure.
30%
Tetragonal crystal system has all sides equal.
13%
Coordination number of BCC is less than FCC crystal structure.
153) Among the following which is not an invariant reaction in a binary phase diagram?
Anonymous Quiz
26%
Monotectic
27%
Peritectoid
37%
Eucotectic
10%
Peritectic
154) Sponge Iron is also called 'DRI'. 'DRI' means......
Anonymous Quiz
20%
Directly Recovered Iron
27%
Directly Removed Iron
30%
Directly Roasted Iron
23%
Directly Reduced Iron
155) Which of the following is used to indicate the Miller Indices of family of planes?
Anonymous Quiz
14%
( )
31%
{ }
41%
[ ]
14%
< >
156) When a steel containing more than 0.8% carbon is cooled slowly below the lower critical point, it consists of..........
Anonymous Quiz
10%
Only Pearlite
36%
Only Ferrite
41%
Coarse Pearlite and Cementite
14%
Fine Pearlite and Cementite
158) Ball bearings are mainly made from which of the following material?
Anonymous Quiz
25%
High Carbon Steel
24%
Chrome steel
42%
Medium Carbon steel
10%
High speed steel
159) The limit below which a material can withstand an infinite number of load cycles without failure is called.........
Anonymous Quiz
21%
Elastic limit
26%
Proportional limit
30%
Endurance limit
23%
Yield limit
160) Which of the following is not a State function of a system?
Anonymous Quiz
6%
Enthalpy (H)
60%
Gibbs Free Energy(G)
27%
Heat(q)
7%
Entropy (S)
161) In Ellingham Diagram C-CO line touches which of the following metal-metal oxide line before the boiling point of the metal? #GATE2022
Anonymous Quiz
10%
Zn-ZnO line
48%
Al-Al2O3 line
35%
Mg-MgO line
7%
Ca-CaO line