Elements_04

Jacky Shane Luyas Buhia · 20問 · 2年前

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Which is not a viscosity rating?

D. Entropy Degrees API

Percent excess air is the difference between air actually supplied and theoretically required divided by:

A. The theoretically air supplied

What is an apparatus use in the analysis of combustible gases?

D. Calorimeter

Percent excess air is the difference between air actually supplied and theoretically required divided by:

A. The theoretically air supplied

The viscosity of most commercially available petroleum lubricating oil changes rapidly above:

B. 180°F

When 1 mol of carbon with 1 mol oxygen:

B. 1 mol of carbon dioxide

What are the immediate undesirable product from the petroleum-based lubricating oil when the subject to high pressure and temperature?

A. Gums, resins and acids

What kind of bonding do common gases that exist in free state as diatomic molecules experiences?

B. Covalent bonds

An Orsat's apparatus is used for

A. Volumetric analysis of the flue gas

A theorem that states that the total property of a mixture of ideal gases is the sum of the properties that the individual gases would have if each occupied the total mixture volume alone as the same temperature.

A. Gibbs theorem

A small enough particles suspended in a fluid will exhibit small random movements due to the statistical collision of fluid molecules on the particle's surface. This motion is called______.

D. Brownian motion

When two or more light atoms have sufficient energy (available only at high temperatures and velocities) to fuse together to form a heavier nucleus the process is called ________.

A. Fusion

What is the residue left after combustion of a fossil fuel?

B. Ash

What is formed during incomplete combustion of carbon in fuels?

B. Carbon monoxide

A gas produced by the combustion of fuel oil and cannot be found in the flue gases is:

C. Hydrogen

Which of the following chemical reactions in which heat is absorbed?

B. Endothermic reaction

A chemical reaction in which heat is given off.

C. Exothermic reaction

A colorless, odorless mixture of nitrogen and oxygen, with traces of other gases water vapor and same impurities.

A. Air

The transfer of air and air characteristics by horizontal motion is called _________.

C. Advection

Properties of non-reacting gas mixtures are given by:

C. Volumetric weighting for molecular weight and density, and geometric weighting for all other properties except entropy

The process of separating two or more liquids by means of the difference in their boiling point.

B. Fractional distillation

The gaseous products of combustion of a boiler which contains carbon dioxide, carbon monoxide, oxygen, nitrogen and water vapor is called _________.

A. Flue gas

A substance whose burning with oxygen yields heat energy such as coal, petroleum and natural gas.

C. Fuel

Stoichiometric ratio is

B. chemically correct air - fuel ratio by weight

A type of radiation consisting of singly charged particles that generate to intermediate distances.

C. Beta radiation

The increase in velocity past the throat is due to the rapid decrease in the:

A. fluid density

In an oxidation - reduction chemical reaction, all of the following occur except:

D. nuclear fusion

The residual oil left after the distillation of gasoline and kerosene from crude petroleum; yellow to brown used as a diesel fuel and for enriching water gas.

D. Gas oil

A fuel gas obtained by the destructive distillation of soft coal is called __________.

B. Coal gas

Removing of impurities from a gas by bubbling it through a liquid purifying agent is called __________.

A. Gas scrubbing

During the fusion process, mass is lost and converted to energy according to:

C. Einstein's law

A finely divided carbon deposit by the smoke or flame is called ___________.

B. Soot

Rare gases such as helium, argon, krypton, xenon and radon that are non - reactive are called ____________.

C. Inert gases

Kinematics and dynamic viscosity vary from each other only by a factor equal to the:

A. Fluid density

The following properties are different for isomers of the same chemical compound except:

C. Number of atoms in a mole of each isomers

Atomic weight of the elements in the periodic table are not whole numbers because of:

A. the existence of isotopes

The tendency of a pure compound to be composed of the same elements combined in a definite proportion by mass.

C. The law of definite proportions

How do you call the process of removing of impurities from a gas by bubbling it through a liquid purifying agent?

A. Gas scrubbing

What is the effect of a catalyst in a chemical reaction?

C. Lower the activation energy

The relationship between the concentration of products and reactants in a reversible chemical reaction given by

B. The equilibrium constant

What fuel gas obtained by the destructive distillation of soft coal?

B. Coal gas

The process of splitting the nucleus into smaller fragments.

B. Fission

The ash that is removed from the combustor after the fuel is burn is the :

B. Bottom ash

A mixture of hydrogen and carbon monoxide made by passing steam over hot coke.

A. Water gas

All of the following are true of non-stoichiometric reactions except

C. non-stoichiometric reactions are rare in the combustion process

It is the ratio of the volume at the end of heat addition to the volume at the start of heat addition.

D. Cut-off ratio

Piston rings are made of:

D. Cast iron

Loss power is due to:

D. low injection pressure

A branch system of pipes to carry waste emissions away from the piston chambers of an internal combustion engine is called

D. exhaust manifold

The type of filler where the filtering elements is replaceable.

B. Metal edge filler

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