ME DPWH SET 16 (593)

What are the particle size analysis?

• Particle size analysis is a method to determine the color of particles
• Particle size analysis measures the weight of particles in a sample
• Particle size analysis is used to identify the chemical composition of particles
• Particle size analysis is the determination of particle size

  distribution in soil by sieve, hydrometer,

  or combined analysis

What are the other terms or particles size analysis?

• Sieve analysis

  Mechanical analysis

  Grading test/analysis

• Sedimentation analysis
• Viscosity analysis
• Density analysis

What is the liquid limit?

• The liquid limit is the lowest moisture content at

  which the soil will flow upon the

  application of a very small shearing force

• The liquid limit is the water content at which soil changes from liquid to solid state.
• The liquid limit is the maximum water content in soil.
• The liquid limit is the water content at which soil becomes impermeable.

The liquid limit is expressed as the moisture

content corresponding to what number of blows?

• 15
• 30
• 40
• 25

What is plastic limit?

• It is the minimum moisture content at

  which the soil can be readily molded

  without breaking or crumbling

• Water content at which a soil changes from a semisolid to a liquid state.
• The water content at which a soil changes from a semisolid to a solid state.

What kind of water shall be used in laboratory test

especially if it deals with chemicals?

• Deionized water/Distilled

• Tap water
• Saltwater
• Mineral water

Liquid limit brass cup with sample is raised and

allowed to drop sharply on the base through a

height of what?

• 10 mm
• 20 mm
• 15 mm
• 5 mm

In doing a plastic limit test, to what diameter shall

the soil thread began to break?

• 3.2 mm

• 3.9 mm
• 2.8 mm
• 4.5 mm

What is the formula for plastic limit?

• Plastic Limit = Liquid Limit + Plastic Limit
• Plastic Limit = Liquid Limit * Plastic Limit
• Plastic Limit = Liquid Limit / Plastic Limit
• PL =(Wa –Wb)/Wb x 100

  Wa = original wt. of crumbled soil thread

  Wb = wt of oven dried crumbled soil

What is the Plastic Index (PI)

• PI = LL + PL
• PI = LL / PL
• PI = LL * PL
• PI = LL - PL