1. Tensile strength of wood is
(a) Maximum in the direction parallel to grains
(b) Minimum in the direction parallel to grains
(c) Maximum in the direction across the grains
(d) The same in all the directions
Answer: (a)
2. Which type of cement is most adaptable for underwater constructions?
(a) Rapid Hardening cement
(b) Ordinary Portland cement
(c) Low-heat Portland cement
(d) Blast furnace slag cement
(a) Rapid Hardening cement
(b) Ordinary Portland cement
(c) Low-heat Portland cement
(d) Blast furnace slag cement
Answer: (d)
3. Green colour of cement is caused by
(a) Iron oxide
(b) Magnesium oxide
(c) Chromium dioxide
(d) Carbon pigments
(a) Iron oxide
(b) Magnesium oxide
(c) Chromium dioxide
(d) Carbon pigments
Answer: (c)
4. Super-plasticizers are
(a) Additives applied to bitumen to achieve a low melting point
(b) Water-reducing admixtures for concrete
(c) Additives applied to bitumen to improve its viscosity
(d) Accelerating admixtures
(a) Additives applied to bitumen to achieve a low melting point
(b) Water-reducing admixtures for concrete
(c) Additives applied to bitumen to improve its viscosity
(d) Accelerating admixtures
Answer: (b)
5. Reducing water/cement ratio in concrete during manufacture results in
(a) Increase in 28 days compressive strength
(b) Decrease in 28 days compressive strength
(c) No change in 28 days compressive strength
(d) Significant increase in tensile strength
(a) Increase in 28 days compressive strength
(b) Decrease in 28 days compressive strength
(c) No change in 28 days compressive strength
(d) Significant increase in tensile strength
Answer: (a)
6. A hollow steel column has an external diameter of 250 mm and an internal diameter of 200 mm. If the safe compressive stress is 120 N/mm2, the safe axial compressive load for the column is, nearly
(a) 2210 kN
(b) 2120 kN
(c) 2000 kN
(d) 1500 kN
(a) 2210 kN
(b) 2120 kN
(c) 2000 kN
(d) 1500 kN
Answer: (b)
7.
Answer: (c)
8.
Beam AB is supported as shown at A and B and has an overhang AC; and it carries
loads as shown in the figure. Which of the following will give the value of W so
that RA = RB?
(a) 4 kN
(b) 6 kN
(c) 8 kN
(d) 10 kN
Beam AB is supported as shown at A and B and has an overhang AC; and it carries
loads as shown in the figure. Which of the following will give the value of W so
that RA = RB?
(a) 4 kN
(b) 6 kN
(c) 8 kN
(d) 10 kN
Answer: (c)
9. A rectangular block is subjected to bi-axial principal stresses of intensity σx and σy, both tensile, with σy > σx. Which of the following will give the radius of the Mohr’s circle?
(a) Minimum shear stress
(b) Maximum shear stress
(c) Minimum Normal stress
(d) Maximum Normal stress
(a) Minimum shear stress
(b) Maximum shear stress
(c) Minimum Normal stress
(d) Maximum Normal stress
Answer: (b)
10.
Answer: (c)
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