1711. Ability of a material to __________ is indicated by its damping capacity.
Withstand compression
Absorb vibration
Absorb shock
None of these
✅ The correct answer is option B.
1713. Galvanising is generally done on
Non-ferrous metals
Low carbon steel
Stainless steel
Cast iron
✅ The correct answer is option B.
1715. Cast iron is having very high
Proximity between its elastic limit and ultimate breaking strength
Ductility
Tensile strength
All of the above
✅ The correct answer is option A.
1691. Galvanising (i.e., zinc coating) of steel sheets is done to
Prevent its rusting by contact with corrosive atmosphere
Protect the base metal by cathodic protection
Both A & B
Neither A nor B
✅ The correct answer is option C.
1678. Economy of a multiple effect evaporator depends upon the
Heat balance consideration
Rate of heat transfer
Both A and B
Neither A nor B
✅ The correct answer is option A.
1679. Radiator of an automobile engine is a __________ type of heat exchanger.
Co-current
Cross-current
Counter-current
Direct contact
✅ The correct answer is option D.
1680. If heat transfer rate varies with the time, it is termed as
Forced convection
Steady state conduction
Monochromatic radiation
None of these
✅ The correct answer is option D.
1681. An ejector is used to
Increase pressure
Increase temperature
Remove condensate
None of these
✅ The correct answer is option D.
1682. Grashoff number, which is defined as g . β(Ts – T∞) ρ². L³/μ², is proportional to the ratio of buoyancy force to __________ force.
Viscous
Elastic
Inertial
None of these
✅ The correct answer is option A.
1683. In a boiling curve, the peak heat flux is called the __________ point.
Nusselt
Leidenfrost
Boiling
Burnout
✅ The correct answer is option D.