Proportionality - General Aptitude - General Aptitude (GA) Previous Year Questions

A horizontal axis drag type wind mill with square blades and a horizontal axis lift type wind mill with airfoil section blades having same rotor size are installed at a height of 10 m above the ground. The average wind speed is 25 km h⁻¹. The maximum power coefficient for drag type and lift type wind mills is 0.148 and 0.593, respectively. If the maximum power extracted by drag type wind mill is 5 kW, the corresponding power extracted by lift type wind mill, in kW is

In the design of an agitator vessel with model volume \(V_1\) and prototype volume \(V_2\), the scale-up ratio is given by

Two irrigation channels are designed in the same type of alluvial soil having the channel bed slopes of 1.52×10⁻⁴ and 1.6×10⁻⁴, respectively. If the design discharge of the first channel, using Lacey's regime theory, is 30 m³ s⁻¹, then the design discharge of the second channel in m³ s⁻¹ will be

A double acting hydraulic cylinder has a bore of 200 mm with a piston rod of 140 mm diameter. The extend speed of the piston is 80 mm s⁻¹. If the flow rate of oil during retraction is same as that of the extending, the retract speed of the piston in mm s⁻¹ is ______.

To construct a wall, sand and cement are mixed in the ratio of 3:1. The cost of sand and that of cement are in the ratio of 1:2.
If the total cost of sand and cement to construct the wall is 1000 rupees, then what is the cost (in rupees) of cement used?

If two distinct non-zero real variables x and y are such that (x + y) is proportional to (x – y) then the value of x/y