Materials and Construction MCQs

Very high cost

Rather low tensile strength

Very low strength to weight ratio

Scarce availability

Highly corrosion resistant and is readily fabricated

Relatively inexpensive although it can be fabricated with some difficulty

Corrosion resistant to most alkalis, particularly because of its coper content

Light and resists attack by acids

Especially resistant to solutions containing H₂SO₄

Usually joined by burning (e.g. by melting to adjacent pieces with a torch)

Having very low elastic limit resulting in permanent deformation from either mechanical or thermal strain

All of the above

Cu (55%) & Sn (45%)

Cu (55%) & Ni (45%)

Pt (95%) & Rh (10%)

Fe (80%) & Ni (20%)

Hysterisis loop area

Stress-strain curve

Relaxation time

None of these

Silicone rubber, teflon, procelain and wood

Nickel, monel, stainless steel and graphite

Aluminium, copper, high silicon iron

Brass, cast iron, mild steel and tin

Polybutadiene

Phenol formaldehyde

Urea-formaldehyde

Dacron

Tin

Lead

Aluminium

Copper

Injection moulded

Cast molded

Extruded

None of these

Tungsten, vanadium and chromium

Tungsten, chromium and vanadium

Vanadium, chromium and tungsten

Chromium, tungsten and vanadium