Question

many marine steam propulsion plants achieve a fuel rate of 0.45 pound of fuel per shaft horsepower hour. determine the equivalent fuel rate in kilograms per shaft kilowatt hour

Answer 1

1 pound is equal to 0.454 kg $\rArr$ the rate from the task can be rewritten as $0.45 pounds * 0. 454 \frac{kg}{pound}\approx0.2 kg$ per shaft horsepower hour

1 horsepower is equal to 740 watts. So 0.74 kilowatts are equal to 1 horsepower

So, the rate from the task can be rewritten as 0.2 kg per 0.74 shaft kilowatt hour

or

$\frac{0.2kg}{0.74}$ per shaft $\frac{0.74kilowatt}{0.74}$ hour

$\frac{0.2kg}{0.74}=0.27kg$

so the rate is equal to

$0.27 kg$ per shaft kilowatt hour