Related Questions

Upto the critical radius of insulation, added insulation, will
A Increase the heat loss
B Decrease heat loss and will have no effect beyond that
C Decrease heat flux
D Reduce convection heat loss compared to conduction heat less
A tank is filled by three pipes with uniform flow. The first two pipes operating simultaneously fill the tank in the same time during which the tank is filled by the third pipe alone. The second pipe fills the tank 5 hours faster than the first pipe and 4 hours slower than the third pipe. The time required by the first pipe is:
A 6 hours
B 10 hours
C 15 hours
D 30 hours
The critical radius is the insulation radius at which the resistance to heat flow is
A Maximum
B Minimum
C Zero
D None of these
Pipe A alone can fill a tankin 8 hours .Pipe B can fill it in 6 hours . If both the pipes are operated and after 2 hours pipe A is closed, then the other pipe will fill the tank in.
A 6 hours
B 3 1/2 hours
C 4 hours
D 1 1/2 hours
A pipe fills a tank in P minuties and another pipe fills the tank in Q minutes. A different pipe makes the tank empty in R minutes. If all these three pipe are opened then in how many minutes the tank will be full?
A p+q-qpqr
B pq+pr-pqpqr
C pq+qr-prpqr
D pqrqr+pr-pq
A water tank with 64-gallon capacity is filled by pipe A and emptied by pipe B. If the rate of water flow through pipe A is 2 gallons per hour, how many gallons per hour should flow through pipe B so that when both pipes are open, the initially empty tank shold be full in exactly 96 hours?
A 3/8
B 4/3
C 2/3
D 8/3
Pipe A can fill an empty cistern in 4 hours while along with Pipe B it can fill it up in 3 hours. Only Pipe A is turned on for an hour after which Pipe B is also turned on. How much total time will it take to fill up the cistern?
A 3 hrs 20 min
B 3 hrs 25 min
C 3 hrs 15 min
D 3 hrs
The line insulation is the insulation level of the station equipment.
A less than
B same as
C more than
D proportional to
E not directly related with
The insulation between windings and grounded core and the insulation between the windings of the same phase is
A minor insulation
B major insulation
C either of the above
D none of the above
Upto the critical radius of insulation,
A Added insulation will increase heat loss
B Added insulation will decrease heat loss
C Convective heat loss will be less than conductive heat loss
D Heat flux will decrease

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