Building Materials

131. Bitumen is generally obtained from

  1. Organic material
  2. Synthetic material
  3. Petroleum product
  4. Coal

Correct answer: (C)
Petroleum product

132. The main constituent which imparts hydraulicity to hydraulic lime is

  1. Calcium oxide
  2. Silica
  3. Clay
  4. Water

Correct answer: (C)
Clay

133. Calcination of iron ores is done

  1. To remove moisture
  2. To remove carbonic acid
  3. By roasting in heaps
  4. All the above

Correct answer: (D)
All the above

134. Which of the following cements is suitable for use in massive concrete structures such as large dams?

  1. Ordinary Portland cement
  2. Low heat cement
  3. Rapid hardening cement
  4. Sulphate resisting cement

Correct answer: (B)
Low heat cement

135. The commonly used thinner in oil paints, is

  1. Naphtha
  2. Turpentine
  3. Both (a) and (b)
  4. None the these

Correct answer: (C)
Both (a) and (b)

136. Minimum thickness of wall where single Flemish bond can be used is

  1. Half brick thick
  2. One brick thick
  3. One and a half bricks thick
  4. Two bricks thick

Correct answer: (C)
One and a half bricks thick

137. The pigment used in paints for corrosive resistance, is

  1. White lead
  2. Ferrous oxide
  3. Zinc white
  4. Red lead

Correct answer: (D)
Red lead

138. Slate is formed by metamorphic action on

  1. Shale
  2. Lime stone
  3. Sand stone
  4. Granite

Correct answer: (A)
Shale

139. Sea sand used in structures causes

  1. Dampness
  2. Efflorescence
  3. Disintegration
  4. All of these

Correct answer: (D)
All of these

140. The trunk of tree left after cutting all the branches is known as

  1. Log
  2. Batten
  3. Plank
  4. Baulk

Correct answer: (A)
Log

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