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.Management Sciences
Category: Materials and Construction
Tin vessels are corroded by____________________?
0
A. Anhydrous ammonia
B. Aromatic solvents
C. Synthetic detergent solution
D. None of these
Hot working of lead is carried out at_________________?
A. 75° C
B. 373° K
C. 150° C
D. Room temperature
The range of Mho’s scale of hardness is from________________?
A. 1 to 15
B. 1 to 8
C. 1 to10
D. 0 to 10
The ‘bomb’ in the bomb calorimeter is made of___________________?
A. Molybdenum stainless steel
B. Mild steel
C. High silicon iron (14% Si)
D. Copper
Pick out the wrong statemen?
A. Hardening makes the steel more brittle
B. High alloy steels contain more than 50% alloying element
C. 18/8 stainless steel is a magnetic steel
D. Both B. and C.
Constantan used in thermocouples is an alloy of___________________?
A. Iron & copper
B. Copper & aluminium
C. Lead & tin
D. None of these
Galvanising is generally done on___________________?
A. Non-ferrous metals
B. Low carbon steel
C. Stainless steel
D. Cast iron
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