MAT. ENVI SCI AND ENGG' QUIZ

What test determined the crushing of strength of aggregates to ensure that coarse aggregates will not degrade to smaller ones

• Abrasion

• Grading

• Density

• Plasticity test

Frenkel defect belongs to which of the following classes?

• Point Defect

• Linear Dislocation

• Interfacial Defect

• Bulk Defect

The ratio of the number of vacancies to a total number of lattice points for a metal near melting temperature is of the order of 10^-4. For lower temperatures, the ratio:

• Increases

• Decreases

• Remains the same

• May increase or decrease depending on the metal

Foreign species is present in which of the following defects?

• Interstitial

• Vacany

• Substitution

• All of the mentioned

Diffusion is the result of

• Random motion of particles

• Concentration gradient

• Kinetic energy of particles

• All of the mentioned

Osmosis is different from diffusion as:

• Diffusion requires semi-permeable membrane

• Osmosis requires a liquid solvent

• Osmosis is a form of active transport

• In osmosis, solute moves from lower concentration to higher

If the atomic radius of Aluminum (FCC) is r, what is the unit cell volume?

• 2.83r³

• 22.63r³

• 18.25r³

• 15.26r³

Which of the following is added as an alloying element to increase the corrosion resistance of steel?

• Vanadium

• Chromium

• Nickel

• Copper

The alloy used for making electrical resistance and heating element is

• Tungsten

• German Silver

• Nichrome

• Invar

When a ferromagnetic material is heated above the curie temperature, it becomes

• Paramagnetic material

• Non-magnetic material

• Diamagnetic material

• Strongly charged