176. Freezing of 35% oleum during its shipment in winter is avoided by the addition of small amount of
A. Hydrochloric acid
B. Methyl alcohol
C. Formic acid
D. Nitric acid
✅ The correct answer is option D.
179. The swift cup test evaluates the following property of a sheet metal.
A. Stretchability
B. Drawability
C. Bendability
D. None of these
✅ The correct answer is option B.
182. Statistical quality control was developed by __________ , an American scientist during world war II.
A. Water shewhart
B. Fredric Taylor
C. John Wright
D. Woolmer
✅ The correct answer is option A.
185. Maximum consumption of limestone is in the __________ industry.
A. Iron and steel
B. Cement
C. Glass
D. Fertiliser
✅ The correct answer is option D.
112. The specific gravity of coal depends mainly on its __________ content.
A. Carbon
B. Volatile matter
C. Ash
D. Moisture
✅ The correct answer is option D.
115. Out of the following, maximum temperature drop for a given heat flow & for the same thickness will be in the case of
A. Steel
B. Glass wood
C. Copper
D. Fireclay bricks
✅ The correct answer is option B.
118. Which of the following rays has the least wavelength?
A. Ultraviolet rays
B. Infrared rays
C. Cosmic rays
D. X-rays
✅ The correct answer is option C.
121. Disposable patterns are made of
A. Metal
B. Polystyrene
C. Rubber
D. Wood
✅ The correct answer is option B.
124. Chromium molybdenum steel can not be welded using __________ welding.
A. Thermit
B. Electrical resistance
C. Oxy-acetylene
D. Any of these
✅ The correct answer is option B.
127. The concentration of (H⁺) ions is 4 x 10⁻⁵ in a solution. Then pH of the solution will be (Given log 4 = 0.6 )
A. 4.4
B. 5.6
C. 8.4
D. 2.4
✅ The correct answer is option A.