A. 10°
B. 20°
C. 30°
D. 45°
E. 60°.
Related Mcqs:
- Tensile strength of a mild steel specimen can be roughly predicted from following hardness test_________________?
A. Brinell
B. Rockwell
C. Vicker
D. Shore’s sceleroscope
E. none of the above - The property of a material which enables it to resist fracture due to high impact loads is known as__________________?
A. elasticity
B. endurance
C. strength
D. toughness
E. resilience - If an unsupported uniform cross sectional elastic bar is subjected to a longitudinal impact from a rigid bob moving with velocity v, then a compressive wave of intensity sc is propagated through the bar as follows______________________?
A. vpE
B. vVvF
C. WpE/2
D. IvHpE
E. none of the above, where E = modulus of elasticity and p = mass density - At low temperatures (say 75°C) the notched-bar impact value of steel____________________?
A. increases markedly
B. decreases markedly
C. remains same
D. depends on heat treatment carried out
E. none of the above - The included angle in unified of American National threads is___________________?
A. 60°
B. 55°
C. 47°
D. 29°
E. none of the above - The edges of a boiler plate are bevelled to an angle of______________?
A. 30°
B. 45°
C. 60°
D. 80°
E. 85°. - The edges of the plates for cylindrical vessels are usually bevelled to an angle of 80° for_________________?
A. reducing stress concentration
B. ease of manufacture
C. safety
D. fullering and caulking
E. all of the above - In standard taper roller bearings, the angle of taper of outer raceway is___________________?
A. 5°
B. 8°
C. 15°
D. 25°
E. 40°. - Oil in journal bearing should be applied at the point where load is________________?
A. nil or lightest
B. maximum
C. average
D. any one of the above
E. unpredictable - In Vicker’s hardness testing, the pyramid indentor apex is__________________?
A. 40°
B. 122°
C. 136°
D. 152°
E. 161°.
