RC MATS 26 - 27

Which of the following pairs would describe the principal gases produced during digestion?

1. Methane

2. Hydrogen sulfide

3. Nitrogen oxide

4. Carbon dioxide

• 1 and 2

• 3 and 4

• 1 and 4

• 2  and 3

In a ferromagnetic alloy, easy migration of domain boundaries usually results in _____.

• a very weak net magnetic moment

• permanent magnetism

• good conductivity

• superconductivity at low temperature

Depreciation allowance is best defined as:

• The value that a buyer will give a machine`s owner at the end of the machine`s useful life.

• A factor whose use is regulated by government law.

• The amount awarded to the industries involved in removing natural limited resources from the earth.

• The amount used to recover the cost of an asset.

The Reynolds number is:

• The ratio of inertial forces to viscous forces

• Rarely important in fluid flow analysis

• The ratio of pressure forces to viscous forces

• A measure of the rate of fluid flow

The strengthening process involving the formation of fine distribution of a second phase is called _____.

• solid solution strengthening

• quench and temper

• precipitation hardening

• case hardening

As the temperature increases, _____.

• the resistivity of a superconductor approaches 0

• the diffusion coefficient of a solute decreases

• the conductivity of an intrinsic semiconductor increases

• the resistivity of a metal decreases

The value i(1 + i)ⁿ/[(1 + i)ⁿ - 1] is known as:

• Uniform series sinking fund factor

• Capital recovery factor

• Single payment present worth factor

• Single payment compound factor

The temperature above which a ferromagnetic material must be heated to lose is ferromagnetism is called the ______.

• critical temperature

• Curie temperature

• saturation point

• transition temperature

During the tension deformation of a metal test bar, necking occurs when ______.

• plastic deformation begins

• strain hardening ceases to operate

• the heat of deformation cause recrystallization

• the ultimate tensile strength is reached

The value (1 + i)ⁿ is known as:

• Single payment present worth factor

• Uniform series sinking fund factor

• Uniform series compound amount factor

• Single payment compound factor