Related Questions

Who invented the thermos flask?
A Ray Tomlinson
B Tim Berners-Lee
C William Cullen
D James Dewar
The ratio of the actual vacuum to the ideal vacuum in a condenser is called
A Condenser efficiency
B Vacuum efficiency
C Nozzle efficiency
D Boiler efficiency
In most of the vacuum crystalliser, vacuum is generally produced by means of a
A Suction pump
B Compressed air jet
C Steam jet ejector with a barometric condenser
D None of these
Vacuum is applied in __________ zone, in case of a general type continuous rotary drum vacuum filter.
A Filtering
B Washing
C Drying
D All of the above
Vacuum maintained in the vacuum distillation column in oil refinery is in the range of about __________ mm Hg absolute.
A 1 to 5
B 30 to 80
C 250 to 350
D 450 to 500
The vacuum maintained in vacuum distillation unit for reduced crude is about __________ mmHg.
A 1.2
B 12
C 120
D 700
Vacuum maintained in the vacuum distillation tower of the crude distillation plant is about __________ mm Hg (absolute).
A 5-10
B 30-80
C 150-250
D 350-400
In which decade were the first successful diode and triode vacuum tubes invented?
A 1800s
B 1880s
C 1890s
D 1900s
FLASK : BOTTLE ::
A metal : glass
B powder : bore
C gauge :rails
D cavalry : infirmity
Tea kept in a thermos flask is vigorously shaken. If the tea is considered as a system, then its temperature will
A Increase
B Decrease
C Remain unchanged
D First fall and then rise

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