Questions and answers for exam Preparation

MCQs

Total Questions : 1424 | Page 7 of 143 pages

Question 61. Pick up the correct statement from the following:

The heating of a material to redness in contact with air, is known as calcination
The property of lime by which it sets or hardens in damp places having no free circulation of air is called setting
The product that remains after calcination of limestone, is called lime
All the above

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Question 62. Pick up the correct statement from the following:

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Question 63. Pick up the correct statement from the following:

The percentage of absorption for firebricks varies from 5 to 10
The percentage of silica in silica bricks is to the extent of about 95 to 97 percent
Roughly 1 to 2 percent of lime in silica bricks is added to act as binding material
All the above

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Question 64. Pick up the correct statement from the following:

The lime in excess makes the cement unsound and causes the cement to expand and disintegrate
The silica in excess makes the cement stronger but its setting time also increases
The excess amount of alumina weakens the cement
All the above

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Question 65. Pick up the correct statement from the following:

The plastic bottles are made by the process of blowing
The application of thermo-setting resins on sheets of paper, is called laminating process
The plastic articles made by placing raw material in the desired moulds, is known as moulding process
All the above

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Question 66. Pick up the correct statement from the following:

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Question 67. Pick up the correct statement from the following:

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Question 68. Pick up the synthetic resin from the following:

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Answer: Option D. -> All of these

Question 69. Pick up the correct statement from the following:

The theory of formation of concrete is based on the phenomena of formation of voids
The bulking of sand is taken into account while volumetric proportioning of the aggregates
The dry sand and the sand completely flooded with water, have practically the same volume
All the above

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Answer: Option D. -> All the above

Question 70. Percentage of silica in a good brick earth lies between