A. Surface roughness
B. Pores
C. Spherical inclusion
D. Crack
Related Mcqs:
- The materials which fracture even at small strains are termed as brittle, while those materials which exhibit an appreciable deformation before failure are termed as__________________?
A. Rigid
B. Tough
C. Ductile
D. Plastic - Fibrous fracture is normally encountered in the ____________________ materials?
A. Hard
B. Elastic
C. Ductile
D. Brittle - Which of the following is not a characteristic observed in material failure by fatigue fracture ?
A. Plastic deformation of material does not occur
B. Initiation of crack from below the surface does not occur
C. Initiation of crack occurs on the surface of the machine part
D. Presence of both rough & smooth zone with conchoidal markings in smooth zone of the - The main reducing agent in iron blast furnace is____________________?
A. Carbon dioxide
B. Carbon monoxide
C. Oxygen
D. Air - Work done in case of free expansion is____________________?
A. Indeterminate
B. Zero
C. Negative
D. None of these - Ideal refrigeration cycle is____________________?
A. Same as Carnot cycle
B. Same as reverse Carnot cycle
C. Dependent on the refrigerant’s properties
D. The least efficient of all refrigeration processes - Specific volume of an ideal gas is____________________?
A. Equal to its density
B. The reciprocal of its density
C. Proportional to pressure
D. None of these - The following heat engine produces power of 100,000 kW. The heat engine operates between 800 K and 300 K. It has a thermal efficiency equal to 50% of that of the Carnot engine for the same temperature. The rate at which heat is absorbed from the hot reservoir is____________________?
A. 100,000 kW
B. 160,000 kW
C. 200,000 kW
D. 320,000 kW - Free energy change at equilibrium is____________________?
A. Zero
B. Positive
C. Negative
D. Indeterminate - The value of (Cp – Cv) for a real gas obeying Vander Wall’s equation is____________________?
A. R
B. > R
C. < R
D. 0.5 R
