The ratio of thermal & electrical conductivity is same for all the metals at the same temperature ; and at around room temperature, this ratio is proportional to(where, T = absolute temperature, °K) September 6, 2025 by Admin A. T B. 1/T C. T² D. 1/T² ✅ The correct answer is option A.
The most important consideration, while designing the refrigeration system of an aircraft is that the refrigeration system September 6, 2025 by Admin A. Is as light as possible B. Has very high C.O.P C. Employs minimum quantity of refrigerant D. Consumer minimum horse power ✅ The correct answer is option A.
The primary strengthening mechanism in 70 : 30 brass is the September 6, 2025 by Admin A. Solid solution strengthening B. Precipitation hardening C. Dispersion strengthening D. Order hardening ✅ The correct answer is option A.
Which is the most lethal weapon ? September 6, 2025 by Admin A. Atom (fusion) bomb B. Hydrogen bomb C. Cobalt bomb D. Neutron bomb ✅ The correct answer is option C.
Vibration upto 100 kilo hertz can be most accurately measured by a __________ type accelerometer. September 6, 2025 by Admin A. Preloaded spring B. Piezoelectric C. Bonded strain gauge D. None of these ✅ The correct answer is option B.
Lead percentage in pure galena is about September 6, 2025 by Admin A. 8.6 B. 86.6 C. 35.8 D. 61.4 ✅ The correct answer is option A.
In the acid Bessemer process, the hot metal should have the following com-positon. September 6, 2025 by Admin 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. September 6, 2025 by Admin A. Absolute B. Reaumer C. Farenhite D. Celcius ✅ The correct answer is option C.
Carburettor in a spark ignition engine is used to September 6, 2025 by Admin 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 ? September 6, 2025 by Admin A. Dislocation climb B. Cross-slip C. Twinning D. Recrystallisation ✅ The correct answer is option D.