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QUESTIONS

Steam Boilers, Engines, Nozzles and Turbines
In a compound steam engine, the first stage of expansion is carried out in a high pressure cylinder whereas the last expansion is completed in low pressure cylinder. The diameter of high pressure cylinder is _________ the low pressure cylinder.

None of the listed here
Less than
Equal to
More than

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Chemistry
The following are the half lives of four active isotopes. Which one of the following is the most dangerous to handle?

13 days
0.01 minute
3 billion years
100 years

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Chemistry
The gas used for artificial ripening of green fruit is

carbon dioxide
acetylene
ethane
ethylene

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Steam Boilers, Engines, Nozzles and Turbines
In a Tandem type compound engine, the high pressure and low pressure cylinders

Are set in V-arrangement
Are set at 90°
Have common piston rod
Have separate piston rods

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Chemistry
Zone refining is used for the purification of

Cu
Ge
Au
Ag

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