943. What is the value of included angle of a triangular notch for maximum discharge ?
A. 30°
B. 60°
C. 90°
D. 120°
✅ The correct answer is option C.
946. __________ column is preferred to be used, when a high liquid hold up is required in a reactor for gas-liquid reaction.
A. Packed
B. Bubble
C. Spray
D. Tray
✅ The correct answer is option C.
949. Streaklines, streamlines & pathlines are almost identical for __________ fluid flow.
A. Ideal
B. Uniform
C. Steady
D. None of these
✅ The correct answer is option C.
952. __________ is not used as a material of construction in thermocouples.
A. Alumel
B. Rhodium
C. Constantan
D. Duralumin
✅ The correct answer is option D.
955. Scaling occurs in boiler tubes due to the fact that, the solubility of Ca(OH)₂ __________ with increasing temperature.
A. Increases
B. Decreases
C. Shows inversion of solubility
D. None of these
✅ The correct answer is option A.
958. Metals in general have a low value of thermal
A. Conductivity
B. Diffusivity
C. Inertia
D. All of the above
✅ The correct answer is option C.
961. If Reynolds number is greater than 1, then the
A. Viscous force is larger than the inertia force
B. Inertia force is larger than the viscous force
C. Inertia force is larger than the surface tension force
D. Inertia force is larger than the gravitational force
✅ The correct answer is option B.
964. X-rays do not exhibit the property of
A. Reflection
B. Scattering
C. Diffraction
D. Dispersion
✅ The correct answer is option B.
924. If the head is doubled in & centrifugal pump, the power required will increase in the ratio of
A. 23
B. 23/2
C. 25/2
D. 21/3
✅ The correct answer is option B.
927. An alloy of Fe – 0.4 % C is
A. Cast iron
B. Hypo-eutectoid steel
C. Hyper-eutectoid steel
D. Eutectoid steel
✅ The correct answer is option B.