Related Questions

Heat flux, as defined in heat flow is analogous to __________ in electricity flow.
A Current
B Voltage
C Resistance
D None of these
Heat flux increases with temperature drop beyond the Leiden frost point in the plot of heat flux vs. temperature drop for a boiling liquid, because
A Convection becomes important
B Conduction becomes important
C Radiation becomes important
D Sub-cooled boiling occurs
The overall resistance for heat transfer through a series of flat resistance, is the __________ of the resistances.
A Average
B Geometric mean
C Product
D Sum
Overall thermal resistance for conductive heat transfer through a series of flat resistances is equal to the
A Maximum resistance in the series
B Sum of all resistances
C Average of all resistances
D Minimum resistance presents in the series
A current of 16 amperes divides between two branches in parallel of resistances 8 ohms and 12 ohms respectively The current in each branch is
A 6.4 A, 6.9 A
B 6.4 A, 9.6 A
C 4.6 A. 6.9 A
D 4.6 A, 9.6 A
In a series parallel circuit, any two resistances in the same current path must be in
A Series with each other
B Parallel with each other
C Series with the voltage source
D Parallel with the voltage source
In a double pipe (concentric) heat exchanger, the hydraulic radius for heat transfer (for a fluid flowing through the annulus) would be
A Same as that for fluid flow
B Less than that for fluid flow
C More than that for fluid flow
D D2 - D1 (D1 and D2 are I.D. of inner and outer pipes respectively)
The r.m.s. value of alternating current is given by steady (D.C.) current which when flowing through a given circuit for a given time produces
A The more heat than produced by A.C. when flowing through the same circuit
B The same heat as produced by A.C. when flowing through the same circuit
C The less heat than produced by A.flowing through the same circuit
D None of the above
Which of the following rivers flowing in Bihar is a north flowing river?
A Bagmati
B Kamla
C Kosi
D Gandak
E None of the above
In a series circuit with unequal resistances
A The highest resistance has the most of the current through it
B The lowest resistance has the highest voltage drop
C The lowest resistance has the highest current
D The highest resistance has the highest voltage drop

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