Question
What is the process called that forms a protective oxide
layer on aluminum?Solution
Anodising is an electrochemical process that thickens and toughens the naturally occurring protective oxide on aluminum. This process enhances corrosion resistance and allows dyeing (coloring), improved adhesion of paints and glues, and electrical insulation.
Two pipes A and B can fill a tank in 24 min., and 32 min, respectively. If both the pipes are opened simultaneously, after how much time B should be clo...
Pipe P can fill a tank in 5 hours, but pipe Q can empty it completely in 20 hours. If both are opened together, find the time needed to fill the tank.
Pipes ‘A’ and ‘B’ can fill a tank in 6 hours and 9 hours, respectively. If pipe ‘C’ is opened along with pipes ‘A’ and ‘B’, then the...
Pipe A can fill a tank in 45 minutes while pipe B can fill it in ____ minutes. There’s a leak in the tank which can empty it in _____minutes. When bot...
A tank has three pipes, X, Y, and Z. X can fill the tank in 8 hours, Y can fill it in 12 hours, and Z can empty it in 6 hours. If X, Y, and Z are opened...
A single tap takes 8 hours to fill the entire tank. Initially, only one tap is open, and it fills one-fourth of the tank. At that point, three additiona...
- Pipe 'A' is 5 times as efficient as pipe 'B'. Pipe 'C', which is one-fifth as efficient as pipe 'B', can fill a tank alone in 25 hours. Find difference bet...
Pipe ‘A’ and pipe ‘B’ can fill a cistern in 20 minutes and 10 minutes respectively. Pipe ‘C’ alone can empty the cistern in 12 minutes. If a...
With a bucket full of water, a tank can be filled with 16 buckets. When each bucket holds 12.5 liters of water, how many buckets of 10-liter capacity ca...
Pipes A and B can fill the tank in 16 and 20 hours respectively. Pipe C empties it in ‘x’ hours. If all are opened together, the tank gets filled in...
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