41. Which one of the following bricks is used for lining of furnaces?

(a) Over- burnt bricks
(b) Under- burnt bricks
(c) Refractory bricks
(d) First quality bricks

Answer: (c)

42.

Answer: (b)

43.

Answer: (c)

44.
(a) 2.5 and 2
(b) 2 and 2.5
(c) 2.5 and 2.5
(d) 2 and 2

Answer: (d)

45.
(a) 60 mm
(b) 120 mm
(c) 180 mm
(d) 240 mm

Answer: (d)

46. A beam of rectangular cross-sectional dimensions 250 mm X 300 mm is subjected to a shear force of 75 kN. The intensity of maximum shear stress in the cross-section is

Answer: (a)

47.

Answer: (c)

48. The shape factor of a rectangular section is
(a) 0.5
(b) 1.0
(c) 1.5
(d) 2.0

Answer: (c)

49. Study of project duration probabilities may become ‘pointless’ in situations where:
1. There exist several components of WBS
2. There exists cross inputs from one WBS to another as regards milestone events
3. Inputs from other infrastructure projects are essential for the progress of the project under consideration
4. Regarding project inventory, situations may prevail where both supply and demand of input materials are deterministic

The severity of these causes to contribute to the ‘pointlessness’ mentioned above is gradable (most severe to least severe) in most cases as:
(a) 3, 2, 1 and 4
(b) 4, 3, 2 and 1
(c) 3, 1, 2 and 4
(d) 4, 2, 3 and 1

Answer: (a)

50.It can be stated in general that if a statically indeterminate frame has R redundancy, then it will become statically determinate if the number of plastic hinge formed is
(a) R
(b) R - 1
(c) R + 1
(d) 2R

Answer: (a)