1175. The speed of sound will be maximum in
A. Vacuum
B. Metal
C. Air
D. Water
✅ The correct answer is option B.
1178. The term ‘Value’ in value engineering technique refers to the __________ cost of the product.
A. Function (utility)
B. Selling
C. Production
D. Total
✅ The correct answer is option A.
1181. Brinell Hardness Number (BHN) for talc is approximately in the range of
A. 1-5
B. 20-30
C. 100-150
D. 200-250
✅ The correct answer is option B.
1184. In case of brasses, with decreasing zinc percentage and increasing copper percentage, its __________ increases.
A. Percentage elongation
B. Brinell hardness
C. Tensile strength
D. All of the above
✅ The correct answer is option A.
1145. Function of gear box is to
A. Reduce the speed
B. Obtain variable speed
C. Increase the speed
D. Produce high torque
✅ The correct answer is option B.
1148. Viscoelastic behaviour is observed in __________ materials.
A. Non-crystalline organic polymeric
B. Ceramic
C. All crystalline
D. All of the above
✅ The correct answer is option A.
1151. Transition from laminar to turbulent zone in free convection heat transfer is governed by the critical value of
A. Grashoff number
B. Grashoff number & Reynolds number
C. Reynolds number
D. Grashoff number & Prandtl number
✅ The correct answer is option D.
1154. Ester is formed, when an alcohol reacts with
A. Carboxylic acid
B. Aldehyde
C. Ketone
D. Ether
✅ The correct answer is option A.
1157. Heat release during phase change is observed in case of a/an
A. Boiler
B. Condenser
C. Evaporator
D. All of the above
✅ The correct answer is option B.
1160. Fahrenheit and Centigrade scales have the same readings at
A. -55°
B. -40°
C. -33°
D. -58°
✅ The correct answer is option B.