GENERAL KNOWLEDGE

GK

PHYSICS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Under which conditions will the rate of flow of a liguid though a metering orifice (or jet) be the greatest (all other factors being equal)?
A
Unmetered pressure, 18 PSI.metered pressure, 17.5 PSI atmospheric pressure14.5 PST
B
Unmetered pressure, 17 PSI; metered pressure, 5 PSI; atmospheric pressure, 14.7 PST
C
Unmetered pressure, 23 PSL metered pressure, 12 PSI, atmospheric pressure14, 3 PSI
D
None of the above
Explanation: 

Detailed explanation-1: -rate of flow will be greatest where the pressure is greatest (between metered and unmetered) C. where unmetered is 17 PSI and metered is 5 PSI. Volume and pressure are inversely proportional.

Detailed explanation-2: -Which atmospheric conditions will cause the true landing speed of an aircraft to be the greatest? High temperature with high humidity.

Detailed explanation-3: -The amount of water vapor in the air is called absolute humidity. The amount of water vapor in the air as compared with the amount of water that the air could hold is called relative humidity.

Detailed explanation-4: -How much work input is required to lower (not drop) a 120-pound weight from the top of a 3-foot table to the floor? *360 foot-pounds. Work is the product of the amount of force applied to an object times the distance through which the force causes the object to move.

Detailed explanation-5: -Designed as small airfoils, winglets reduce the aerodynamic drag associated with vortices that develop at the wingtips as the airplane moves through the air. By reducing wingtip drag, fuel consumption goes down and range is extended.

There is 1 question to complete.