Search
.Management Sciences
Category: Materials and Construction
The chlorinator used in the manufacture of DDT is made of___________________?
A. Glass
B. Glass lined steel
C. Teflon
D. Bakelite
Kel-F is a material, which is________________?
A. Chemically known as Polychlorotrifluoroethylene (PTFE)
B. Having excellent chemical & high temperature resistance (upto 200°C)
C. Having elastomeric properties
D. All A., B. and C.
Pick out the wrong statement?
A. Wrought iron contains about 0.02% carbon
B. Wrought iron cannot be easily forged and welded
C. The chilled cast iron does not contain graphite
D. Spheroidal grey cast iron contains graphite flakes
Which of the following undergoes granular fracture ?
A. Wrought iron
B. Steel
C. Cast iron
D. None of these
Which of the following materials may prove unsuitable for handling acetic acid (glacial & anhydrous) at 40°C ?
A. Silicone rubber, teflon, porcelain and wood
B. Nickel, monel, stainless steel and graphite
C. Aluminium, copper, high silicon iron
D. Brass, cast iron, mild steel and tin
Cast irons are generally specified by their_________________?
A. Carbon content
B. Tensile strength
C. Hardness
D. Manufacturing process
Which of the following is not an alloy of nickel and chromium ?
A. Inconel
B. Hastelloy
C. Nimonic alloys
D. Duralumin
Austenitic manganese steel used for making jaws of crushing machines contains about ______________ percent manganese?
A. 1.5-2
B. 3.5-4.5
C. 7-9
D. 12-14
Dies for wire drawing are generally made of__________________?
A. Mild steel
B. Stainless steel
C. Carbides
D. High carbon steel
Recent Comments