Wood Adhesion Quiz

What is the tendency of dissimilar molecules to cling together due to attractive forces?

• Cohesion

• Adhesion

• Chemisorption

• Electrostatic Theory

Which type of bonding involves actual linkage from atom to atom?

• Hydrogen bond

• Ionic bond

• Covalent bonds

• Van der Waals forces

What is the strongest known bond?

• Van der Waals forces

• Covalent bonds

• Hydrogen bond

• Ionic bond

Which type of bonding occurs when hydrogen interacts with hydrogen covalently bonded to O, N, or F?

• Ionic bond

• Covalent bonds

• Van der Waals forces

• Hydrogen bond

What type of interaction occurs due to the size of atoms and molecules?

• Hydrogen bond

• Dipole-dipole interaction

• London Dispersion Forces

• Polar to Polar interaction

Which theory suggests that adhesion is developed through the interdiffusion of molecules between the adhesive and the adherend?

• Electrostatic Theory

• Mechanical Interlocking

• Diffusion Theory

• Chemisorption

What is the predominant mechanism of failure in bonded joints where the failure occurs between the adhesive and one of the adherends?

• Mechanical Interlocking

• Cohesive failure

• Adhesive failure

• Diffusion Theory

What is the extra energy that surface molecules have in relation to the interior molecules called?

• Surface bonding

• Surface attraction

• Surface energy

• Surface tension

What is the degree of a surface to be wet by a liquid measured by determining the angle between the droplet and the natural axis of the surface?

• Spreading Coefficient

• Contact angle

• Surface tension

• Wetting angle

Which factor affects the extent of wetting for adhesives by ensuring that the adhesive is in a liquid state?

• Assembly time

• Adhesive rheology

• Adhesive compatibility

• Adhesive composition