A. 8.6
B. 86.6
C. 35.8
D. 61.4
✅ The correct answer is option A.
Engineering MCQs
In the acid Bessemer process, the hot metal should have the following com-positon.
A. S < 0.05% and P < 0.05%
B. S < 0.05% and P < 1.5%
C. S < 0.05% and P > 1.5%
D. S > 1.5% and P < 0.05%
✅ The correct answer is option A.
First empirical temperature scale conceived is the __________ temperature scale.
A. Absolute
B. Reaumer
C. Farenhite
D. Celcius
✅ The correct answer is option C.
Carburettor in a spark ignition engine is used to
A. Mix air-fuel in the desired ratio
B. Maintain a constant speed at varying loads
C. Adjust the stroke length
D. Increase the compression ratio
✅ The correct answer is option A.
Which of the following phenomenon/ phenomena is/are diffusion controlled ?
A. Dislocation climb
B. Cross-slip
C. Twinning
D. Recrystallisation
✅ The correct answer is option D.
Thermal diffusivity of a substance is proportional to (where, k = Thermal conductivity)
A. 1/k
B. k
C. k²
D. 1/k²
✅ The correct answer is option B.
In case of simple harmonic motion, displacement is proportional to the
A. Velocity
B. Acceleration
C. Both A & B
D. Neither A nor B
✅ The correct answer is option B.
For the Stoke’s law to be valid in the case of a falling sphere in a fluid, the
A. Reynolds number (based on sphere diameter) should be < 1
B. Flow around the sphere should be in turbulent region
C. Sphere must be metallic
D. Fluid density should be constant
✅ The correct answer is option C.
__________ is not a case hardening process.
A. Carburising
B. Nitriding
C. Cyaniding
D. Annealing
✅ The correct answer is option A.
The entropy change for a spontaneous process is
A. > 0 for the system
B. < 0 for the system
C. > 0 for the system & the surrounding
D. < 0 for the system & the surrounding
✅ The correct answer is option D.