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39 questions
21
Alloys
Easy
+1.0
-0.33
Which among the following are constituents of brass?
22
Alloys
Easy
+1.0
-0.33
Brass is a combination of what metals?
23
Alloys
Easy
+1.0
-0.33
Which pair of following is of Copper alloys?
24
Alloys
Easy
+1.0
-0.33
Check these statements : (i) Brass is an alloy of Copper and Zinc. (ii) Magnetite is the main ore of Aluminium. (iii) Amalgams involve mercury. (iv) Potassium Nitrate (KNO3) used in photography. Which are true?
25
Alloys
Easy
+1.0
-0.33
Brass gets fade colour in air due to the presence of –
26
Alloys
Easy
+1.0
-0.33
Combination of which substance in alloy renders stainless steel non-magnetic?
27
Alloys
Easy
+1.0
-0.33
To make the steel hard requires increase in –
28
Alloys
Easy
+1.0
-0.33
Steel slag can be the material for which of the following? (1) Construction of base road (2) Improvement of agricultural soil (3) Production of cement Select correct answer:
29
Alloys
Easy
+1.0
-0.33
Which of the following elements is added to iron to produce steel which can resist high temperature, have high hardness and abrasion resistance?
30
Alloys
Easy
+1.0
-0.33
The important metal used with iron to make it rust free–