Related Questions

Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of portland cement. The component of Portland cement which first hardens is
A 5CaO . 3Al2O3
B 3CaO . Al2O3
C 3CaO . SiO2
D 2CaO . SiO2
For the manufacture of Portland cement, the proportions of raw materials used, are
A Lime 63% ; silica 22% ; other ingredients 15%
B Lime 22% ; silica 63% ; other ingredients 15%
C Silica 40% ; lime 40% ; other ingredients 20%
D Silica 70% ; lime 20% ; other ingredients 10%
For testing compressive and tensile strength of cement, the cement mortar is made by mixing cement and standard sand in the proportions of
A 1 : 2
B 1 : 3
C 1 : 4
D 1 : 6
Monte catini process is a widely used process for the manufacture of
A Urea
B Calcium ammonium nitrate
C Triple superposphate
D None of these
__________ steel is widely used for the manufacture of motor car crankshafts.
A Silicon
B Nickel
C Chrome
D High speed
If 15 men working independently and at the same rate can manufacture 27 baskets in an hour, how many baskets would 45 men working independently and at the same rate manufacture in 40 minutes?
A 27
B 35
C 40
D 54
If 15 men working at the same rate can manufacture 27 baskets in an hour, how many baskets would 45 men manufacture in 40 minutes?
A 27
B 54
C 35
D 40
Which of the following materials is used in the manufacture of resistance grids to be used in the starters of largemotors ?
A Copper
B Aluminium
C Steel
D Cast-iron
Vibrating screens are used for handling large tonnages of materials. The vibrating motion is imparted to the screening surface by means of
A Electromagnets
B Cams or eccentric shafts
C Unblanced fly wheels
D Either A, B or C
The maximum quantity of calcium chloride used as an accelerator in cement in percentage by weight of cement is
A 1
B 2
C 3
D 4

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