Time
DUETian ME Brand
Weekly Examination-01
: 40 Minutes
Full Marks : 40
1. For the tank shown in Fig., determine the reading of the pressure
gage if: (a) H 2 m, h 10 cm. (b) H 0.8 m, h 20 cm
2. Two chambers with the same fluid at their base are separated by a
30-cm-diameter piston whose weight is 25 N, as shown in Fig.
Calculate the gage pressures in chambers A and B.
3. Consider the system shown in Fig.. If a change of 0.9 kPa in the
pressure of air causes the brine-mercury interface in the right
column to drop by 5 mm in the brine level in the right column while
the pressure in the brine pipe remains constant, determine the ratio
of A2/A1.
4. A multifluid container is connected to a U-tube, as shown in Fig.
For the given specific gravities and fluid column heights, determine
the gage pressure at A. Also determine the height of a mercury
column that would create the same pressure at A.
5. The column consists of a wooden post and a concrete footing,
separated by a steel bearing plate. Find the maximum safe value of
the axial load P if the working stresses are 10 N/mm2 for wood
and 4.5 N/mm2 for concrete.
6. Find the maximum allowable value of P for the column. The crosssectional areas and working stresses (sw) are shown in the figure
7. FIG. shows a Stress-strain diagram obtained from the standard
tension test on a structural steel specimen. Identify the name of
the marked point.
8. The following data were recorded during a tensile test of a 14.0mm-diameter mild steel rod. The gage length was 50.0 mm.
Determine the following mechanical properties: (a) proportional
limit; (b) modulus of elasticity