Mechanical Engineering Quiz # 28

What is the path generated by a point on the circumference of a circle?

Parabola

Hyperbola

Straight line

Cycloid

When referring to flexible manufacturing, it is true that it ________.

No warning

Just-in-time

Equal in quality and capability in all participating countries

Uses machines designed to perform multiple tasks so they can be used to produce a variety of products

The goal achieved by using mass production is to ________.

Produce goods of the highest possible quality

Replace all employee jobs with speedier machines

Provide the maximum flexibility in production

Produce large quantities of goods at a low cost

The main goal of utilizing a mass customization production system is to ________.

Produce as many identical products as possible in the shortest amount of time

Utilize robots to reduce production expenses while achieving customer satisfaction regardless of production cost

Produce a customized product that will achieve customer satisfaction regardless of production costs

Produce a customized product at almost the rate of mass production while achieving customer satisfaction

Prior to the implementation of total quality management, defective items were ________.

Passed off as perfect products

Incorporated into a new product

Scrapped or reworked

Stored indefinitely

What is the value of flow work on a unit mass basis?

Pt

Pd

$

Pv

What is the technical term for forced-draft cooling tower?

Dry well cooling tower

Wet well cooling tower

Induced-draft cooling tower

Wet-cooling tower

Cooling tower

What is a forced-draft cooling tower?

A heat exchanger

A wet cooling tower

A chimney

A dry cooling tower

What is the sign convention for heat and work interactions?

Informal sign convention

Energy sign convention

No sign convention

Material sign convention

Formal sign convention

What is the name of the convention that defines the direction of heat transfer and work?

Sign convention

Joule-Thomson convention

Mass flow convention

Thermal conductivity convention

What does the crankshaft complete for each thermodynamic cycle?

Four revolutions

Six revolutions

Intake valves open and exhaust valves close

Two revolutions

Compressor spins

A four stroke engine has an odd number of cycles per cylinder, so it has an even total number of cycles per revolution. How many revolutions per thermodynamic cycle is that?

Four

Three

Six

Two

What kind of material can be burned?

Paper

Fuel

Plastic

What can be used as fuel to release energy?

Air

Material

Electricity

Gas

The fuel-air ratio is the reciprocal of what?

Fuel air pressure

Fuel-air mixture

Fuel-air ratio

Air-fuel ratio

Fuel mixture

What is the ratio of air to fuel in an engine?

Air-fuel ratio

Fuel-air ratio

Airspeed

Air/fuel mixture

What are fuel cells not?

Electric motors

Aircraft

Solar panels

Heat engines

What is the name of the efficiency limit of a fuel cell?

Nyquist

Watt

Thermodynamic limit

Joule

Carnot

What is the chemical energy of a fuel cell converted to?

Electric energy

Mechanical energy

Heat

Thermal energy

What is the difference between the absolute pressure and the local atmospheric pressure?

Relative atmospheric pressure

Absolute pressure

Atmospheric pressure

Gage pressure

What does the Gage pressure represent?

The atmospheric pressure at a specified altitude

The inside air pressure

The atmospheric pressure at sea level

The difference between the absolute pressure and the local atmospheric pressure

The atmospheric pressure

What determines the value of R for each gas?

R = Rn/P

R = Ru/M

R = nRT

R = RT

R = Rf

What is the phase of a substance that has molecules that are far apart from each other?

Liquid phase

Gas phase

Solid phase

What is constantly occurring when molecules are in a container?

Leaving the container

Moving around

Colliding with each other

Becoming bonded

What are cycles where the working fluid remains a gas throughout the entire cycle?

Electric power cycles

Gas power cycles

Electricity generation cycles

Steam power cycles

What remains a gas throughout the entire cycle in a gas power cycle?

The working fluid

The fuel

The exhaust gas

The heat transfer fluid

The heat transfer medium

The lower-temperature working fluid is used to produce what effect?

Pumping

Heating

Refrigeration

What is the working fluid in a gas refrigeration cycle?

Higher-temperature fluid

Condenser water

Lower-temperature fluid

What type of chart shows that gases seem to obey the principle of corresponding states reasonably well?

Generalized compressibility chart

Venn diagram

Packed column chart

Rayleigh chart

Density-volume diagram

What does the name gasses seem to obey?

Corresponding states

The second law of thermodynamics

Molecular forces

Nuclear forces