A. Close the surface porosity
B. Break the continuity of columnar grains
C. Flatten the weldment
D. Introduce texture in the weld
✅ The correct answer is option A.
Engineering MCQs
Machinability of hard alloys & tool steels is improved by
A. Spherodising
B. Annealing
C. Tempering
D. Normalising
✅ The correct answer is option B.
The leaching solvent used in Baeyer’s process for the purification of bauxite is
A. Ammonium hydroxide
B. Sodium carbonate
C. Sodium hydroxide
D. Ammonium carbonate
✅ The correct answer is option B.
Turning/machining of __________ usually does not require any cutting fluid.
A. Cast iron
B. Stainless steel
C. Mild steel
D. Copper
✅ The correct answer is option A.
Evaporative cooling process employs a combination of cooling and humidification in which the
A. Sensible heat is added
B. Sensible heat is removed and the latent heat is added
C. Latent heat is removed
D. Sensible heat is added and latent heat is removed
✅ The correct answer is option B.
Which of the following does not come under the category of electrochemical corrosion?
A. Corrosion in organic liquids
B. Atmospheric corrosion in moist gas or air
C. Soil corrosion as in the case of underground pipes
D. Corrosion in sea water and molten metals
✅ The correct answer is option A.
When dry bulb temperature & wet bulb temperature of moist air is the same, it means that the
A. Partial pressure of water vapour is less than the total pressure
B. Humidity is < 100% & dew point temperature of air has not reached
C. Dew point temperature of air has not reached & air is not saturated fully
D. Air is fully saturated
✅ The correct answer is option D.
Air-petrol ratio in an automotive petrol engine is around
A. 14 : 1
B. 22 : 1
C. 25 : 1
D. 4 : 1
✅ The correct answer is option A.
Coating thickness in case of galvanising of steel sheet generally corresponds to the deposition of __________ gms of zinc per m² of steel strip.
A. 5-10
B. 1000-1500
C. 120-500
D. 1500-3000
✅ The correct answer is option C.
Heat treatment of steel is done mainly to change its
A. Mechanical properties
B. Physical properties
C. Chemical composition
D. All of the above
✅ The correct answer is option A.