A. Radio
B. Light
C. X-ray
D. Gamma-ray
✅ The correct answer is option A.
Engineering MCQs
In troposphere (the weather domain), the temperature ‘t’ at height ‘h’ above the sea level in metres is given by (where, temperature at sea level is 15°C and t is in °C.)
A. T = 15 – 0.0065 h
B. T = 15 + 0.0065 h
C. T = 0.0035 h – 15
D. T = 15 – 0.0035 h
✅ The correct answer is option A.
With increase in __________ Knocking tendency in a spark ignition petrol engine decreases.
A. Supercharging
B. Wall temperature
C. Compression ratio
D. Engine speed
✅ The correct answer is option D.
Which of the following metals can be extracted from its ore by both pyrometallur-gical as well as hydrometallurgical methods ?
A. Copper
B. Zinc
C. Both A & B
D. Neither A nor B
✅ The correct answer is option C.
Fire on fuel oil lines can be extinguished by
A. Foam
B. Steam
C. Water
D. Carbon dioxide
✅ The correct answer is option A.
Which of the following metals can not be extracted by pyrometallurgical process from its sulphide ore?
A. Copper
B. Mercury
C. Lead
D. None of these
✅ The correct answer is option B.
Which of the following test is used for distinguishing among dry oils, semi-drying oils and non drying oils?
A. Elaiden test
B. Reichart-Meissl value test
C. Henter value test
D. Iodine value test
✅ The correct answer is option A.
Killed steels
A. Are free from oxygen
B. Contain not even traces of sulphur & phosphorous
C. Are produced by L.D. process only
D. Contain minimum impurity level
✅ The correct answer is option A.
Brass parts with high residual tensile stress at the surface are susceptible to season cracking (i.e. spontaneous cracking occuring on exposure to atmospheric corrosion), if its zinc percentage is more than
A. 5
B. 10
C. 20
D. 35
✅ The correct answer is option C.
With increase in pressure, the latent heat of steam
A. Increases
B. Decreases
C. Remains unchanged
D. Data insufficient; can’t be predicted
✅ The correct answer is option B.