Related Questions

A tank is fitted with 8 pipes, some of them that fill the tank and others that are waste pipe meant to those that empty the tank can empty it in 6 hours. If all the pipes are kept open when the tank is full, it will take exactly 6 hours for the tank to empty. How many of these are these are fill pipes?
A 2
B 4
C 6
D 5
Under conditions of equal reduced pressure and equal reduced temperature, substances are said to be in the 'corresponding states'. At equal reduced conditions i.e., at the corresponding state, the __________ of different gases are nearly the same.
A Compressibility
B Molecular weight
C Humidity
D None of these
Two pipes A & B would fill a tank in 20 & 30 minutes respectively. Both pipes being open, find when A must be turned off so that tank may be just filled in 15 minutes.
A After 10 minutes
B After 20 minutes
C After 15 minutes
D None
Lead is poured into the joint between two pipes. These pipes may be made of
A Cast iron
B Vitrified clay
C Asbestos cement
D Concrete
Corrosion involves exchange of electrons in __________ corrosion.
A Chemical
B Electrochemical
C Both A & B
D Neither A nor B
Which of the following pipes is least corrosion resistant?
A Brass
B Mild steel
C Cast iron
D Wrought iron
The process of covering water pipes made of Iron with Zinc layer to prevent corrosion is called :
A Zinc plating
B Alloy formation
C Vulcanization
D Galvanization
Two pipes A and B can fill a tank in 20 and 30 minutes respectively . If both the pipes are used together , then how long will it take to fill the tank ?
A 12 min
B 15 min
C 25 min
D 50 min
Three pipes can independently fill a water tank in 10,12 and 15 hours. How many hours will it take for all three pipes opened together to fill half of the tank?
A 6
B 5
C 4
D 2
Two pipes A and B can fill a tank in 15 minutes and 20 minutes respectively. Both the pipes are opended together but after 4 minutes, pipe A is turned off. What is the total time required to fill the tank?
A 10 min 20 sec
B 11 min 45 sec
C 12 min 30 sec
D 14 min 40 sec

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