Recrystallisation temperature of steel is ______________________ °C?
A. 50
B. 300
C. 500
D. 800
Chemical Engineering Basics
Absolute zero pressure can be attained at a temperature of___________________?
Absolute zero pressure can be attained at a temperature of___________________?
A. 0°C
B. 50°K
C. 0°R
D. None of these
Corrosion of metals cannot be prevented by its__________________?
Corrosion of metals cannot be prevented by its__________________?
A. Tempering
B. Chromising
C. Aluminising
D. Alloying
Other parameters remaining same, the recrystallisation temperature of an alloy is lowered, when_________________?
Other parameters remaining same, the recrystallisation temperature of an alloy is lowered, when_________________?
A. Strain rate is increased
B. Grain size is increased
C. Prior cold deformation is increased
D. Not affected by any of the above parameters
Which of the following rays has the least wavelength ?
Which of the following rays has the least wavelength ?
A. Ultraviolet rays
B. Infrared rays
C. Cosmic rays
D. X-rays
Which of the following is not a principal alloying element for the structural steel ?
Which of the following is not a principal alloying element for the structural steel ?
A. Molybdenum
B. Nickel
C. Manganese
D. Chromium
The following type of bonding is strongly directional in solids ?
The following type of bonding is strongly directional in solids ?
A. Vander Waal’s
B. Ionic
C. Metallic
D. Covalent
Diffusion co-efficient of a metal in a solid solution depends upon its ?
Diffusion co-efficient of a metal in a solid solution depends upon its ?
A. Composition
B. Temperature
C. Both A. & B.
D. Neither A. nor B.
Mild steel has _______________ crystal lattice structure?
Mild steel has _______________ crystal lattice structure?
A. Face centred cubic (fcc)
B. Body centred cubic (bcc)
C. Orthorhombic
D. Cubic
Wrought iron is never shaped by__________________?
Wrought iron is never shaped by__________________?
A. Casting
B. Cold working
C. Forging
D. Welding