A. molecular change
B. physical change
C. allotropic change
D. solidus change
E. atomic change
Related Mcqs:
- A reversible change in the atomic structure of the steel with a corresponding change in the properties is known as_________________?
A. allotropic change
B. recrystallisation
C. heat treatment
D. precipitation
E. austempering - Machining properties of steel are improved by adding___________________?
A. sulphur, lead, phosphorous
B. silicon, aluminium, titanium
C. vanadium, aluminium
D. chromium, nickel
E. lubricants - The metallic structure of mild steel is_________________?
A. body centred cubic
B. face centred cubic
C. hexagonal close packed
D. cubic structure
E. orthorhombic crystal - The mathematical technique for finding the best use of limited resources in an optimum manner is known as___________________?
A. operation research
B. linear programming
C. network analysis
D. queuing theory
E. break-even analysis - The property of a fluid which enables it to resist tensile stress is known as___________________?
A. compressibility
B. surface tension
C. cohesion
D. adhesion
E. viscosity - The ratio of heat utilised to produce steam and the heat liberated in furnace is known as___________________?
A. boiler effectiveness
B. boiler evaporative capacity
C. factor of evaporation
D. equivalent evaporation
E. boiler efficiency - In petrol engines, the maximum power is developed corresponding to relative fuel air ratio of________________?
A. 0.85
B. 1
C. 1.1 to 1.3
D. 1.2 to 1.5 - Which is false statement about properties of aluminium ___________________?
A. modulus of elasticity is fairly low
B. wear resistance is very good
C. fatigue strength is not high
D. creep strength limits its use to fairly low temperatures
E. corrosion resistance is good - At which pressure the properties of water and steam become identical_________________?
A. 0.1 kg/cm2
B. 1 kg/cm2
C. 100 kg/cm2
D. 225.6 kg/cm2
E. it is never possible - Pick up wrong statement about desired properties of a good fuel__________________?
A. high calorific value
B. produce minimum smoke and gases
C. ease in storing
D. high ignition point
E. ecomomical
