Question

1. A lever is 4 metres long and is suspended at

its centre of gravity. The lever is in

equilibrium in horizontal position. In which

state of equilibrium will it come to rest, if

it is loaded with 8 kg at the right end?

2. Besides the 8 kg at the right end, the lever

in Exercise 1 is loaded with 3 kg at an equal

distance from the suspension point and the 8

kg weight. How many kg should we place at the

left end to make the bar hang in a horizontal

stable position of equilibrium?

3. By sounding an oil tank, its contents are

found to be 245 m3. The specific gravity of

the oil is 0.850 t/m3. Calculate the weight

of the oil.

4. A ballast tank contains 474.2 t sea water

with a specific gravity of 1.025. Calculate

the volume taken up by the water.

5. A drilling rig with a triangular underwater

form floats in salt water having a specific

gravity of 1.025. The rig is 80 m long and 70

m wide. Find the displacement of the rig when

it has a draught of 15'04".

6. An oil sample has a volume of 1 litre. The

container holding the sample weighs 275 g.

The oil sample plus container weigh 1.120 kg.

Find the specific gravity of the oil.

9. Convert 3,550 cubic metres to US barrels.

10. A specific gravity of a drilling fluid is

given as 1.625 kg/dm3.

Convert this figure to the following units:

ts/bbl,

lbs/gallon (US),

and lbs/cub.ft.

Answer 1