Related Questions

A water tank has two taps (Tap-1 and Tap-2) . Tap -1 can fill a tank in 8 hours and Tap-2 can empty the tank in 16 hours . How long will they take to fill the tank if both taps are opened simultaneously but Tap-2 is closed after 8 hours ?
A 10
B 12
C 14
D 16
A water tank has two taps ( Tap-1 and Tap-2) : Tap-1 can fill a tank in 8 hours and Tap-2 can empty the tank in 16 hours . How long will they take to fill the tank if both taps are opened simultaneously but Tap -2 is closed after 8 hours?
A 10
B 12
C 14
D 16
In a transformer the tappings are generally provided on
A Primary side
B Secondary side
C Low voltage side
D Can be connected to any side
A tank can be filled by a tap in 20 minutes and by another tap in 60 minutes . Both the taps are kept open for 10 minutes and then the first tap is shut off. After this , the tank will be completely filled in what time ?
A 10 min
B 15 min
C 20 min
D 25 min
A tank can be filled by a tap in 20 minutes and by another tap in 60 minutes . Both the taps are kept open for 10 minutes and then the first tap is shut off. After this, the tank will be completely filled in what time?
A 10 min
B 15 min
C 20 min
D 25 min
A water tank has two taps (Tap1 -Tap2) . Tap -1 can fill a tank in 8 hours and Tap- 2 can empty the tank in 16 hours. How long will they take to fill the tank if both taps are opened simultaneously but tap-2 is closed after 8 hours?
A 10
B 12
C 14
D 16
A tap can fill a tank in 6 hours . After half the tank is filled another simila tap is opened. What is the total time taken to fill the tank completely?
A 3 h 30 m
B 3 h 45 m
C 4 h30 m
D 4 h
The effect of changing the evaporator temperature on COP as compared to that of changing the condenser temperature (in vapour compression refrigeration system) is
A Less pronounced
B More pronounced
C Equal
D Data insufficient, can't be predicted
In a step down transformer, there is a charge of 15A in the load current. This results in changing of supply current of
A Less than 15 A
B Greater than 21 A
C More Than 21A
D None
Which of the following is the main advantage of an auto-transformer over a two-winding transformer?
A Eddy losses are totally eliminated
B Copper losses are negligible
C Saving in winding material
D Hysteresis losses are reduced

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