HYDRAULICS & GEOTECHNICAL ENGINEERING
EXAM QUESTIONS AND ANSWERS
#1. Which of the following states the law of buoyancy? - ANSWER -
Archimedes
#2. A flow in which the velocity of the fluid at a particular fixed point does
not change with time. - ANSWER -steady flow
#3. Which component of rock or soil is independent of interparticle
friction? - ANSWER -cohesion
#4. A phenomenon in which the strength and stiffness of soil is reduced
by earthquake shaking or other rapid loading? - ANSWER -liquefaction
#5. A pile of sand keeps from spreading out like a fluid because the
weight of the sand keeps the grains stuck together in their current
arrangement, mostly out of static friction. This weight and pressure are
called? - ANSWER -effective stress
#6. Which of the following is a soil component? - ANSWER -
minerals, organic materials, water,air (gas)
#7. A practice or procedure is used to assess a granular material's
particle size distribution (also called gradation). The size distribution is
often of critical importance to the way the material performs in use. -
ANSWER -sieve analysis
#8. According to USCS, what do you call a soil grain size greater than
4.75 mm but less than 75 mm? - ANSWER -gravel∶particles of rock that
will pass a 3 inch (75mm) sieve and be retained on a No.4 (4.75mm)
coarse∶ - ANSWER passes 3 inch (75mm) sieve and retained on 3/4
inch (19mm) sieve
, fine∶ - ANSWER passes 3/4 inch (19mm) sieve and retained on No.4
(4.75mm) sieve
boulders∶ - ANSWER particles of rock that will not pass a 12 inch
(300mm) square opening
cobble∶ - ANSWER particles of rock that will pass a 12 inch (300mm)
square opening and be retained on a 3 inch (75mm)
#9. Which of the following affect the settlement of a footing? - ANSWER
-location of GWT,depth of backfill,plasticity of soil
#10. Section 302.4.1 NSCP, steepness of the fill (above natural ground)
shall not exceed: - ANSWER 1V∶2H
#11. Section 302.2.2 NSCP, steepness of the cut shall not exceed: -
ANSWER 1V∶2H
#12. The elastic tendency of liquids which makes them acquire the least
surface area possible. It is responsible, for example, when an object or
insect such as mosquitos that is denser water is able to float or run
along the water surface. - ANSWER -surface tension
#13. The ratio between the volume of water and the volume of voids: -
ANSWER -degree of saturation
#14. The ratio between the volume of voids and the volume of soil mass:
- ANSWER -porosity
#15. The ratio between the weight of water and the weight of solid
particles: - ANSWER -moisture content
#16. According to USCS, what do you call a soil grain with grain size
greater than 4.75 mm but less than 75 mm - ANSWER gravel
#17. When the path lines of the individual particles of a flowing liquid are
irregular curves and continually cross each other and form a complicated
network, the flow is called - ANSWER turbulent
EXAM QUESTIONS AND ANSWERS
#1. Which of the following states the law of buoyancy? - ANSWER -
Archimedes
#2. A flow in which the velocity of the fluid at a particular fixed point does
not change with time. - ANSWER -steady flow
#3. Which component of rock or soil is independent of interparticle
friction? - ANSWER -cohesion
#4. A phenomenon in which the strength and stiffness of soil is reduced
by earthquake shaking or other rapid loading? - ANSWER -liquefaction
#5. A pile of sand keeps from spreading out like a fluid because the
weight of the sand keeps the grains stuck together in their current
arrangement, mostly out of static friction. This weight and pressure are
called? - ANSWER -effective stress
#6. Which of the following is a soil component? - ANSWER -
minerals, organic materials, water,air (gas)
#7. A practice or procedure is used to assess a granular material's
particle size distribution (also called gradation). The size distribution is
often of critical importance to the way the material performs in use. -
ANSWER -sieve analysis
#8. According to USCS, what do you call a soil grain size greater than
4.75 mm but less than 75 mm? - ANSWER -gravel∶particles of rock that
will pass a 3 inch (75mm) sieve and be retained on a No.4 (4.75mm)
coarse∶ - ANSWER passes 3 inch (75mm) sieve and retained on 3/4
inch (19mm) sieve
, fine∶ - ANSWER passes 3/4 inch (19mm) sieve and retained on No.4
(4.75mm) sieve
boulders∶ - ANSWER particles of rock that will not pass a 12 inch
(300mm) square opening
cobble∶ - ANSWER particles of rock that will pass a 12 inch (300mm)
square opening and be retained on a 3 inch (75mm)
#9. Which of the following affect the settlement of a footing? - ANSWER
-location of GWT,depth of backfill,plasticity of soil
#10. Section 302.4.1 NSCP, steepness of the fill (above natural ground)
shall not exceed: - ANSWER 1V∶2H
#11. Section 302.2.2 NSCP, steepness of the cut shall not exceed: -
ANSWER 1V∶2H
#12. The elastic tendency of liquids which makes them acquire the least
surface area possible. It is responsible, for example, when an object or
insect such as mosquitos that is denser water is able to float or run
along the water surface. - ANSWER -surface tension
#13. The ratio between the volume of water and the volume of voids: -
ANSWER -degree of saturation
#14. The ratio between the volume of voids and the volume of soil mass:
- ANSWER -porosity
#15. The ratio between the weight of water and the weight of solid
particles: - ANSWER -moisture content
#16. According to USCS, what do you call a soil grain with grain size
greater than 4.75 mm but less than 75 mm - ANSWER gravel
#17. When the path lines of the individual particles of a flowing liquid are
irregular curves and continually cross each other and form a complicated
network, the flow is called - ANSWER turbulent
