A. Rusts
B. Melts
C. Is heated
D. None of these
Related Mcqs:
- The phenomenon in which slow extension of material takes place with the time at constant load is called________________?
A. Plasticity
B. Creep
C. Elasticity
D. Ductility - Hastelloy C is a good material of construction in chemical process industry, since it is ___________________?
A. Highly corrosion resistant and is readily fabricated
B. Relatively inexpensive although it can be fabricated with some difficulty
C. Corrosion resistant to most alkalis, particularly because of its copper content
D. Light and resists attack by acids - Which of the following material of construction may be recommended by a chemical engineer for handling a gaseous chlorine (dry or wet) stream in a fluid flow system ?
A. High silicon iron, silicon rubber, Kel-F and Teflon
B. Mild steel and stainless steel
C. Cast iron, tin and aluminium
D. Copper, nickel and Monel - Pick out the wrong statement?
A. The toughness of a material decreases, when it is heated
B. Crane hooks are normally made of wrought iron
C. Cold working of a metal decreases its fatigue strength
D. The temperature at which new grains are formed in a metal is known as the recrystallisation
temperature - High speed cutting tool steels contain about _______________ percent of tungsten?
A. 6-8
B. 18-20
C. 30-35
D. 50-55 - How many atoms are there per unit cell in a body centred cubic lattice system ?
A. 6
B. 5
C. 3
D. 2 - Compressive strength of wood is usually more along the grains. The tenile strength of wood as compared to that of steel is about_______________?
A. Half
B. One third
C. One fifth
D. One twelfth - Polymorphism is not exhibited by______________________?
A. Carbon
B. Iron
C. Phosphorous
D. None of these - Approximate value of the modulus of elasticity for steel is about _____________ × 106kg/cm2?
A. 0.5
B. 2
C. 40
D. 75 - Hydrocyanic acid is not shipped in______________?
A. Cast iron vessels
B. Steel cylinders
C. Aluminium containers
D. Monel drums
