Engineering Archives

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.

962. Even though heat transfer co-efficients in boiling liquids is large, use of fins is advantageous, when the entire surface is exposed to __________ boiling.

A. Film

B. Nucleate

C. Transition

D. All of the above

✅ The correct answer is option A.

963. Which of the following is the terminology used for the temperature at which the phase changes occur in a metal ?

A. Critical temperature

B. Recrystallisation temperature

C. Phase transformation temperature

D. Transition temperature

✅ The correct answer is option A.

964. X-rays do not exhibit the property of

A. Reflection

B. Scattering

C. Diffraction

D. Dispersion

✅ The correct answer is option B.

965. The power of a low capacity prime mover is most suitably measured by a __________ type dynamometer.

A. Driving

B. Transmission

C. Absorption

D. None of these

✅ The correct answer is option C.

966. Puddling process is used for converting pig iron into

A. Cast iron

B. Wrought iron

C. Mild steel

D. Semi-steel

✅ The correct answer is option C.

967. Out of the following, the most ductile material is

A. Mild steel

B. Copper

C. Nickel

D. Aluminium

✅ The correct answer is option A.

968. Spheriodising of a material is a/an __________ process.

A. Normalising

B. Annealing

C. Tempering

D. Hardening

✅ The correct answer is option B.

969. The heat treatment to which the steel wire containing > 0.25% carbon is subjected to is

A. Full annealing

B. Bright annealing

C. Patenting

D. None of these

✅ The correct answer is option C.

970. Which of the following are made out of the carbon steel having carbon content of 0.9 to 1% ?

A. Small punches, broaches reamers and springs

B. Cutlery, screws, rivets and files

C. Mandrels, twist drills, small lathe tools and razors

D. Forgings like can shaft, structural steel plate, threading dies and drawing dies

✅ The correct answer is option A.