Which of the following metals reacts violently with water ?
Which of the following metals reacts violently with water ?
A. Mercury
B. Sodium
C. Calcium
D. Magnesium
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One face of a furnace wall is at 1030°C and the other face is exposed to room temperature (30°C). If the thermal conductivity of furnace wall is 3 W . m-1 . k-1 and the wall thickness is 0.3 m, the maximum heat loss (in W/m) is
Question: One face of a furnace wall is at 1030°C and the other face is exposed to room temperature (30°C). If the thermal conductivity of furnace wall is 3 W . m-1 . k-1 and the wall thickness is 0.3 m, the maximum heat loss (in W/m) is
[A].100 [B].
900 [C].
9000 [D].
10000 Answer: Option D
Explanation:
No answer description available for this question.
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) ?
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/T2Resistance of an electrical conductor is proportional to its (where, l = length and A = crosssectional area of the conductor)________________?
Resistance of an electrical conductor is proportional to its (where, l = length and A = crosssectional area of the conductor)________________?A. A
B. l
C. A2
D. Both A. & B.Evaporative cooling process employs a combination of cooling and humidification in which the
Question: 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. Answer: Option B
Explanation:
No answer description available for this question.
_______________ has a negative co-efficient of linear expansion?
_______________ has a negative co-efficient of linear expansion?A. Iron
B. Copper
C. Rubber
D. NickelDraught produced by a tall chimney due to density difference between hot flue gas inside the Chimney and atmospheric air outside the chimney is more appropriately known as the __________ draught.
Question: Draught produced by a tall chimney due to density difference between hot flue gas inside the Chimney and atmospheric air outside the chimney is more appropriately known as the __________ draught.
[A].natural [B].
induced [C].
forced [D].
chimney Answer: Option A
Explanation:
No answer description available for this question.