51. Clay and silt content in good brick earth must be at least
A. 50%
B. 40%
C. 30%
D. 25%
A.50%
52. Which of the following is the purest form of iron?
A. Castiron
B.Wroughtiron
C. Mild steel
D. High carbon steel
B.Wroughtiron
53. Pick up the incorrect statement from the following
A. Hydraulic lime is generally obtained by burningkankar
B. Hydraulic lime sets slowly as compared to fat lime
C.Hydraulic lime is generally used in lime mortar
D. None of these
D. None of these
54. Assertion A: Normally turpentine oil is recommended as thinner for indoor painting. Reason R: Turpentine oil is costlier than other thinners.Select your answer according to the coding system given below:
A. Both A and R are true and R is the correct explanation of
B. Both A and R are true but R is not the correct explanation of
C. A is true but R is false
D.A is false but R is true
B. Both A and R are true but R is not the correct explanation of
55. Putty is
A. Made with finely powdered chalk and linseed oil
B. Used for fixing glass panes
C. Softened by a solution of pearl ash and quick-lime soaked in water
D. All the above
D. All the above
56. A mortar joint in masonry which is normal to the face of a wall is known as
A. Bed joint
B. Walljoint
C.Crossjoint
D. Bonded joint
C.Crossjoint
57. Which of the following pairs gives a correct combination of the useful and harmful constituents respectively of good brick earth?
A.Lime stone and alumina
B. Silica and alkalies
C. Alumina andiron
D. Alkalies and magnesium
B. Silica and alkalies
58. Pick up the correct statement from the following
A. The distinct plane of division along which a stone can easily be split is called the natural bed of stone
B. The natural bed of sedimentary rocks is along the planes of stratification
C. The natural bed of igneous rocks is not defined
D. All the above
D. All the above
59. Hydraulic lime is obtained by
A. Burning of limestone
B. Burning ofkankar
C. Adding water to quicklime
D. Calcination of pure clay Answer
B. Burning ofkankar
60. The ratio of the thickness of the web to that of the flange of steel rolled structural beams and channels is
A. Less than1
B. Equal to1
C.Greater than1
D. Less than 1 in beams but greater than 1 in channels
A. Less than1
