1. Define the following terms with their units.
i. Specific weight ii. Specific gravity iii. Surface Tension iv. Dynamic viscosity v. Kinematic viscosity.
2. How does the dynamic viscosity of (a) liquids and (b) gases vary with temperature?
3. What is manometer? How they are classified?
4. Calculate specific weight, density, specific volume and specific gravity of one liter of liquid which weighs 7.836 N.
5. A cubical block of sides 1m & weighing 350N slides down an inclined plane with a uniform velocity of 1.5 m/s. The inclined plane is inclined at 30ْْ° to horizontal & has an oil film of 1mm thickness. Calculate the dynamic viscosity of oil.
6. In a 50mm long journal bearing arrangement, the clearance between the two at concentric condition is 0.1mm. The shaft is 2.0mm in diameter and rotates at 3000 rpm. The dynamic viscosity of the lubricant used is 0.01 pas and the velocity variation in the lubricant is linear. Considering the lubricant to be Newtonian, calculate the frictional torque the journal has to overcome and the corresponding power loss.
7. Calculate the capillary rise in a glass tube of 2.5 mm diameter when immersed vertically in (a) water and (b) mercury. Take surface tensions 0.0725 N/m for water and 0.52 N/m for mercury. The angle of contact for mercury is 130°.
8. A 80 Kg man has a total foot imprint area of 300 cm2. Determine the pressure this man exerts on the ground if (a) he stands on both feet and (b) he stands on one foot.
9. Consider a 1.8-m-tall man standing vertically in water and completely submerged in a pool. Determine the difference between the pressures acting at the head and at the toes of this man, in kPa.
10. A U tube manometer is used to measure the pressure of water in a pipeline, which is in excess of atmospheric pressure. The right limb of the manometer contains mercury and is open to atmosphere. The contact between water and mercury is in the left limb. Determine the pressure of water in the main line, if the difference in level of mercury in the limbs of U tube is 10 cm and the free surface of mercury is in level with the centre of the pipe. If the pressure of water in pipeline is reduced to 9810 Pa, calculate the new difference in the level of mercury. Sketch the arrangements in both cases.
i. Specific weight ii. Specific gravity iii. Surface Tension iv. Dynamic viscosity v. Kinematic viscosity.
2. How does the dynamic viscosity of (a) liquids and (b) gases vary with temperature?
3. What is manometer? How they are classified?
4. Calculate specific weight, density, specific volume and specific gravity of one liter of liquid which weighs 7.836 N.
5. A cubical block of sides 1m & weighing 350N slides down an inclined plane with a uniform velocity of 1.5 m/s. The inclined plane is inclined at 30ْْ° to horizontal & has an oil film of 1mm thickness. Calculate the dynamic viscosity of oil.
6. In a 50mm long journal bearing arrangement, the clearance between the two at concentric condition is 0.1mm. The shaft is 2.0mm in diameter and rotates at 3000 rpm. The dynamic viscosity of the lubricant used is 0.01 pas and the velocity variation in the lubricant is linear. Considering the lubricant to be Newtonian, calculate the frictional torque the journal has to overcome and the corresponding power loss.
7. Calculate the capillary rise in a glass tube of 2.5 mm diameter when immersed vertically in (a) water and (b) mercury. Take surface tensions 0.0725 N/m for water and 0.52 N/m for mercury. The angle of contact for mercury is 130°.
8. A 80 Kg man has a total foot imprint area of 300 cm2. Determine the pressure this man exerts on the ground if (a) he stands on both feet and (b) he stands on one foot.
9. Consider a 1.8-m-tall man standing vertically in water and completely submerged in a pool. Determine the difference between the pressures acting at the head and at the toes of this man, in kPa.
10. A U tube manometer is used to measure the pressure of water in a pipeline, which is in excess of atmospheric pressure. The right limb of the manometer contains mercury and is open to atmosphere. The contact between water and mercury is in the left limb. Determine the pressure of water in the main line, if the difference in level of mercury in the limbs of U tube is 10 cm and the free surface of mercury is in level with the centre of the pipe. If the pressure of water in pipeline is reduced to 9810 Pa, calculate the new difference in the level of mercury. Sketch the arrangements in both cases.
Waterproofing of basements with trowel applied thick film bituminous coatings is becoming ever more popular. However there are two very different application procedures currently in common use and only one is correct!
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