Which of the following alloying element of stainless steel that attributes a large increase in stress-corrosion resistance?

Which of the following statements are correct with regard to the 'truth and validity' in logical reasoning. Select the correct code from the below: (a) Truth and falsity are attributes of individual propositions. (b) Validity and invalidity are attributes of individual propositions. (c) Truth and falsity are attributes of arguments. (d) Validity and invalidity are attributes of arguments. Code:

A

(a) and (b)

B

(b) and (d)

C

(a) and (c)

D

(a) and (d)

Stainless steel is usually made by alloying the steel with

A

Copper and nickel

B

Copper and chromium

C

Chromium and nickel

D

Manganese and copper

Which of the following element is the most beneficial alloying element in steel for resistance to sulfur compounds?

A

Chromium

B

Nickel

C

Molybdenum

D

Carbon

Stainless steel A has a stacking fault energy of 8 mJ.m^-2 and stainless steel B has a stacking fault energy of 45 mJ. m^-2. The correct statement out of the following are.
P. A will have a wider stacking faults than B
Q. A will strain harden more rapidly than B
R. A and B will develop similar type of substructure
S. A and B will have the same temperature dependence of flow stress.

A

P, Q, R

B

P, Q

C

P, R, S

D

P, S

Which one of the following sets is incorrect to show the inter-relationships among price elasticity coefficient, change in price and change in total revenue ? Price elasticity coefficient Change in price Change in Total Revenue 1) Zero Increase Decrease Increase Decrease (2) Less than 1 Increase Decrease Decrease Increase (3) Equal to 1 Increase Decrease No change No change (4) More than 1 Increase Decrease Decrease Increase

A

(1)

B

(2)

C

(3)

D

(4)

Assertion 'a': Hardenability of steel can be increased by adding certain alloying elements.
Reason 'r': The alloying elements can provide a fine dispersion of alloy carbides

A

Both 'a' and 'r' are true, but 'r' is not a correct reason for 'a'

B

Both 'a' and 'r' are false

C

'a' is true but 'r' is false

D

Both 'a' and 'r' are true and 'r' is a correct reason for 'a'

Stainless steel is very useful material in our life. In stainless steel, iron is mixed with

A

Ni and Cr

B

Cu and Cr

C

Ni and Cu

D

Cu and Au

The accompanying image shows a large cube made of dark and white small sugar cubes. Small cubes of the diagonally arranged row of the bottom surface of the large cube, small cubes of the row with one face on the right-hand surface of the large cube, small cubes of the row with one face on the front surface of the large cube, and small cubes of the column with one face on the top of large cube surface are all dark. Select the number of small white cubes of the large cube.

A

49

B

50

C

51

D

52

Which of the following alloying elements increase resistance of steel to atmospheric corrosion?

A

Copper

B

Nickel

C

Chromium

D

Copper, nickel and chromium

Nickel and __________ are the alloying element added in steel to increase its toughness.

A

Molybdenum

B

Chromium

C

Vanadium

D

Silicon

Which of the following alloying element of stainless steel that attributes a large increase in stress-corrosion resistance?

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