Polybutadiene
Phenol formaldehyde
Urea-formaldehyde
Dacron
✅ The correct answer is option A.
Materials and Construction MCQs
Babbit metal used for bearings is a____base alloy.
Tin
Lead
Aluminium
Copper
✅ The correct answer is option A.
Thermosetting polymers are
Injection moulded
Cast molded
Extruded
None of these
✅ The correct answer is option B.
18-4-1 high speed steel contains 18%, 4% and 1% respectively of
Tungsten, vanadium and chromium
Tungsten, chromium and vanadium
Vanadium, chromium and tungsten
Chromium, tungsten and vanadium
✅ The correct answer is option B.
Which has the maximum melting point out of the following?
Steel
Cast iron
Stainless steel
Wrought iron
✅ The correct answer is option D.
Silicon percentage in iron castings to have maximum hardness should be about
0.3
0.5
0.8
2.5
✅ The correct answer is option C.
Which of the following comprises of hydrocarbons?
Mica flakes
Glass
Rubber
None of these
✅ The correct answer is option C.
Karbate is
A mixture of iron dust and saw dust
Carbon impregnated with resin (usually bakelite)
An acid resistant material
Both B and C
✅ The correct answer is option D.
The softest material just next to talc in the Mhos scale is
Quartz
Gypsum
Feldspar
Fluorite
✅ The correct answer is option B.
Which of the following is an alloy of nickel and copper?
Hastelloy
Duriron
Monel
Inconel
✅ The correct answer is option C.