A. area at the time of fracture
B. original cross-sectional area
C. average of A. and B.
D. minimum area after fracture
E. none of the above.
Related Mcqs:
- During a tensile test on a specimen of 1 cm cross-section, maximum load observed was 8 tonnes and area of cross-section at neck was 0.5 cm2. Ultimate tensile strength of specimen is___________________?
A. 4 tonnes/cm2
B. 8 tonnes/cm2
C. 16 tonnes/cm2
D. 22 tonnes/cm2
E. none of the above - In the tensile test, the phenomenon of slow extension of the material, i. e. stress increasing with the time at a constant load is called_____________?
A. creeping
B. yielding
C. breaking
D. plasticity
E. none of the above - In a tensile test on mild steel specimen, the breaking stress as compared to ultimate tensile stress is_________________?
A. more
B. less
C. same
D. more/less depending on composition
E. may have any value - Efficiency of a riveted joint is the ratio of its strength (max. load it can resist without failure) to the strength of the unpunched plate in_________________?
A. tension
B. compression
C. bearing
D. any one of the above
E. none of the above - The percentage reduction in area of a cast iron specimen during tensile test would be of the order of_________________?
A. more than 50%
B. 25—50%
C. 10—25%
D. 5—10%
E. negligible - In riveted boiler joints, all stresses, shearing, bearing and tensile are based on the_________________?
A. size of rivet
B. size of the drilled or reamed hole
C. average of size of rivet and hole
D. smaller of the two
E. any one of the above - Percentage reduction of area in performing tensile test on cast iron may be of the order of__________________?
A. 50%
B. 25%
C. 0%
D. 15%
E. 60%. - In a tensile test, near the elastic limit zone, the______________?
A. tensile strain increases more quickly
B. tensile strain decreases more quickly
C. tensile strain increases in proportion to the stress
D. tensile strain decreases in proportion to the stress
E. tensile strain remains constant - The impact strength of a material is an index of its ___________________?
A. toughness
B. tensile strength
C. capability of being cold worked
D. hardness
E. fatigue strength - The stress at which extension of the material takes place more quickly as compared to the increase in load is called______________?
A. elastic point of the material
B. plastic point of the material
C. breaking point of the material
D. yielding point of the material
E. ultimate point of the material
