A. Fuel cells
B. Photo voltaic cell
C. Magneto hydrodynamic generator
D. None of these
Related Mcqs:
- 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 - Thermal equivalent of electrical power in practical calculation is _______________ kcal/kWh ?
A. 746
B. 3000
C. 1000
D. 550 - Temperature of hot gases flowing in a pipe is measured by a thermocouple inserted in the thermal well. The thermal well made of ______________ will facilitate the most accurate measurement of the temperature ?
A. Copper
B. Steel
C. Aluminium
D. Brass - Thermal diffusivity of a substance is proportional to (where, k = Thermal conductivity) ____________________?
A. 1/k
B. k
C. k2
D. 1/k2 - A furnace is made of a refractory brick wall of thickness 0.5 metre and thermal conductivity 0.7 W/m.°K For the same temperature drop and heat loss, this refractory wall can be replaced by a layer of diatomaceous earth of thermal conductivity 0.14 W/m.K and thickness ______________ metre?
A. 0.01
B. 0.1
C. 0.25
D. 0.5 - 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 - Faraday’s law of electrolysis is related to the____________________?
A. Cation speed
B. Atomic number of the cation
C. Equivalent mass of the electrolyte
D. None of these - An oxidation process is accompanied with decrease in the____________________?
A. Number of electrons
B. Oxidation number
C. Number of ions
D. All A , B. & C. - An abrupt and sudden fall in the reading of barometer is an indication of the____________________?
A. Storm
B. Rain
C. Clear weather
D. Cold wave - In inventory control theory, the economic order quantity (EOQ) is the____________________?
A. Lot size corresponding to break even analysis
B. Average level of inventory
C. Optimum lot size
D. None of these
