A. 1800
B. 2000
C. 2400
D. 3000
Related Mcqs:
- Theoretical volume of oxygen required for complete combustion of 1Nm3 of acetylene, in oxy-acetylene welding is ______________ Nm3 ?
A. 0.5
B. 1
C. 1/3
D. 2.5 - The boiling & freezing points on a newly defined temperature scale in degree ‘D’ are 400°D & 100°D respectively. The temperature reading corresponding to 60°C on this new temperature scale will be equal to _____________ °D ?
A. 140
B. 180
C. 240
D. 280 - Heating the Hypo-eutectoid steels to 30°C above the upper critical temperature line, soaking at that temperature and then cooling slowly to the room temperature to form a pearlite & ferrite structure is called_______________________?
A. Tempering
B. Hardening
C. Annealing
D. Normalising - 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) ?
A. T
B. 1/T
C. T2
D. 1/T2 - Steel is welded using the ________________ flame ?
A. Carburising
B. Neutral
C. Oxidising
D. All A, B. & C - Oxyacetylene reducing flame is used while carrying out welding on___________________?
A. Alloy steel
B. Grey cast iron
C. Mild steel
D. High carbon steel - Oxyacetylene reducing flame is used while carrying out welding on__________________?
A. Alloy steel
B. Grey cast iron
C. Mild steel
D. High carbon steel - If a nuclear reactor produces more fissile nuclear fuel than it consumes, then it is called a _____________ reactor?
A. Critical
B. Breeder
C. Fertile
D. Heterogeneous - 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 transition temperature at which all the ferromagnetic materials become paramagnetic materials is termed as the ‘Curie temperature’. Its value for cobalt is ______________ °C?
A. 768
B. 1127
C. 1359
D. 1480
