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Civil engineering interview questions for freshers

Concrete cover for Reinforcement :-
  •  Footing   -  3" or 75mm
  • Column   -  1.5" or 40mm
  • Beam       -  1.5" or 40mm
  • Slab          -  0.75" or 20mm
  • Stair         -  0.75" or 20 mm

Weight of steel in meter :-
  • D^2/162.2 kg/m

Weight of steel in feet:-
  • D^2/533 kg/ft

  • Full length of a deformed MS bar is about 40feet or 12 meter

TMT:-  Thermo mechanical treated bars

TMX:-  Thermax Powered bar

SD:-   Super Ductile bar

HYSD:- High Yield strength deformed bar

CTD :- Cold Twisted bar





Type of steel :-

  • Mild steel - characteristic strength is 250 N/sqmm
  • Hysd - (i) Fe 415 = fy - 415N/sqmm
  •             (ii) Fe500 = fy - 500N/sqmm

  1. Minimum number of bars in a square shape column :- 4 no.
  2. Minimum number of bars in a Round shape column :- 6 no.
  3. For binding one ton of MS bar 8kg to 12 kg binding wire is required.
  4. MS bar for chair should not be less than 12mm diameter.
  5. Maximum chair spacing  = 1 meter
  6. Minimum diameter of bars used in slab = 8mm
  7. Minimum diameter of bars used in column= 12 mm
  8. Minimum diameter of bars used in dowel bars  = 12 mm
  9. Maximum diameter of bars used in slab should not be exceed 1/8th of total slab thickness.
  10. Minimum % of steel in column is 0.8% of gross area of column.
  11. Maximum % of steel in column is 6% of gross area of column.
  12. The transverse Reinforcement of column are called Ties.
  13. The transverse Reinforcement in beam are called stirrups.
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