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A material has a mass of 95 g and 68 g before and after abrasion, respectively. If the abrasive
ratio of 1.85, find the area of abrasion.
A solid brass bar 5.0 m long with rectangular cross-section, whose dimensions are 115 mm
by 188 mm is loaded in tension with a pull of 196.77 Mg. After which, it is loaded in
compression with a push of 168.59 Mg. If the load P used to bend the steel bar is the average
of the tensile and compressive load and there is bending and shear in the cross-section,
Calculate the following:
a. Compressive Strength
b. Maximum bending strength (Hint: assume length of the steel is the distance between
supporting ends)
A solid steel bar with rectangular cross-section whose dimensions are 100mm by 175 mm is
loaded in tension with a pull of 186.5Mg. After which, it is loaded in compression with a push of
170Mg. If the load P used to bend the steel bar is the average of the tensile and compressive
load and there is bending and shear in the cross-section, Calculate the following:
a. Tensile Strength
b. Shear Strength
A 150-kg sample of Steel is heated to a temperature of 143°C and elongates by 58 mm. If its
temperature before it is heated is 37°C, specific heat is 0.46 J/g-K and its length extends to
420 mm, calculate the following:
a. Heat absorbed or thermal conductivity
b. Linear expansion coefficient
A 200-kg sample of Granite is heated to a temperature of 98°C and elongates by 25mm. If its
temperature before it is heated is 25°C, specific heat is 0.80 J/g-K and its length extends to
250mm, calculate the following:
a. Heat absorbed or thermal conductivity
b. Linear expansion coefficient
A 175-kg sample of Copper is heated to a temperature of 116°C and elongates by 35mm. If
its temperature before it is heated is 20°C, specific heat is 0.38 J/g-K and its length extends to
330 mm, calculate the following:
a. Heat absorbed or thermal conductivity
b. Linear expansion coefficient
In a sample of sand, water seeps at a volume of 158 cm3 in 7.89 minutes. If the seepage area
and thickness of the specimen are 69 cm2
and 0.628 m, respectively, what is the permeability
coefficient? The water has a head of 34 cm.
A sample of concrete has a compressive strength of 21.07 MPa in dry state and in its
saturated state, its compressive strength is 14.25 MPa. Find the Softening Coefficient of the
material.
A material has a natural mass of 250 g; its density is 3.6 g/cm3; apparent density of 2.75 g/cm3 and bulk density is 3.64 g/cm3, and saturated mass is 285 g. If the dry volume is 58 cm3, calculate the following:
a. Moisture content
b. Specific absorption of Quality
c. Specific absorption of Volume
A material has a dry mass of 295 g and bulk density is 3.85 g/cm3. If the dry volume is 68 cm3, calculate the following:
a. Fill Rate
b. Voidage
