284. In order to predict the behaviour of a small oil pump, tests are to be made on a model
using air. The pump is to be driven by a 1/20-hp motor at 1800 rpm and a ΒΌ-hp motor is
available to drive the air at 600 rpm. Using specific gravity of oil at 0.912 and density of air
constant at 0.076 lb/ ft3
, what size model should be built?
A. The model should be 2 times as large as the oil pump.
B. The model should be 5 times as large as the oil pump.
C. The model should be 8 times as large as the oil pump.
D. The model should be 10 times as large as the oil pump.
. The model should be 10 times as large as the oil pump.