Related Questions

The air entry velocity m a rocket as compared to aircraft is
A Same
B More
C Less
D Zero
In a engineering, test, a rocket sled is propelled into a target. If the sled's distance d in meters from the target is given by the fomula d = - 1.5 t2+120, where t is the number of seconds after rocket ignition, then how many seconds have passed since rocket ignition when the sled is 10 meters from the target?
A 2.58
B 8.59
C 8.94
D 9.31
When the air is passed through an insulated chamber having sprays of water maintained at a temperature higher than the dew point temperature of entering air but lower than its dry bulb temperature, then the air is said to be
A Cooled and humidified
B Cooled and dehumidified
C Heated and humidified
D Heated and dehumidified
When water is sprayed on air, passing through an insulated chamber maintained at a temperature higher than the dew point of entering air but lower than its dry bulb temperature, then the air is
A Cooled and dehumified
B Heated and humidified
C Cooled and humidified
D Heated and dehumidified
A rocket works with maximum overall efficiency when air craft velocity is equal to the
A Jet velocity
B Twice the jet velocity
C Half the jet velocity
D Average of the jet velocity
In a spray washing system, if the temperature of water is higher than the dry bulb temperature of entering air, then the air is
A Heated and dehumidified
B Heated and humidified
C Cooled and humidified
D Cooled and dehumidified
The process, which causes the air to enter the impeller blades of a centrifugal compressor at ________ velocity (without effecting the mass of air to flow and velocity of flow) is known as prewhirl.
A Reduced
B Increased
C Zero
D None of these
For liquid flow through a packed bed, the superficial velocity as compared to average velocity through the channel in the bed is
A More
B Less
C Equal
D Independent of porosity
What is the minimum velocity required for a rocket to overcome earth's gravity and travel into space?
A 18 km\/sec
B 11.2 km\/sec
C 21 km\/sec
D 35 km\/sec
What is the minimum escape velocity of rocket to be launched into space ?
A 5 Km/Sec.
B 6 Km/Sec.
C 11 Km/Sec.
D 15 Km/Sec.

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