Mechanical Engineering Quiz # 47

What is efficiency?

The amount of work done

The ratio of output over input.

The rate at which work is done

The quality of work done

What does EMF stand for?

Energy management factor

Environmental management factor

Electric magnetic field

Electromotive force

What is energy?

Emotion or feeling

A natural occurrence

Capacity for doing work

The happiness one experiences when they are doing something they love

What does an engine do?

Pumps water

Cuts wood

Produces power to do work

Burns coal

What is the act of discharging gases from an engine after they have done work called?

Gases

Engine

Discharge

Exhaust

What is the exhaust cam?

A kind of fuel

The cam that controls the operation of the exhaust valve.

A type of engine

The cam that controls the operation of the intake valve.

What are exhaust gases?

The gases used to cool the engine

The unused air and fuel mixture in the cylinder

Products of combustion which are discharged from the cylinder after doing work on the piston.

The air and fuel mixture that is combusted in the cylinder

What is the exhaust manifold?

The pipe that collects the unburnt gases as they are expelled from the cylinders.

The pipe that burns the unburnt gases before they are expelled from the cylinders.

The pipe that cools the burnt gases before they are expelled from the cylinders.

The pipe that collects the burnt gases as they are expelled from the cylinders.

What is an exhaust pyrometer?

A machine used to generate exhaust

An instrument used to measure the temperature of the exhaust

A tool used to mix exhaust

A device used to measure the amount of exhaust

What is the function of an exhaust valve?

The valve through which the unburnt gases are allowed to pass out to the intake manifold.

The valve through which the unburnt gases are allowed to pass out to the exhaust manifold.

The valve through which the unburnt gases are allowed to pass out to the cylinder head.

The valve through which the burnt gases are allowed to pass out to the exhaust manifold.

The expansion period is the portion of the power stroke during which:?

The spark plug fires.

The engine is idling.

The combustion gases expand from the movement of the piston and thus do work.

The piston is at the top of its stroke.

What does a filter do?

Adds dirt and impurities to air, oil, or water.

Remove dirt and other impurities from air, oil, or water.

Creates air, oil, and water.

Sorts air, oil, and water.

What does the term "Fit" mean in regards to machined engine parts?

The desired positive or negative clearance between the surfaces of two machined engine parts.

When two engine parts are too close together.

The process of making two engine parts match each other

Two matching engine parts that have been machined

What is Fluctuation?

Oscillation

Upheaval

Alteration

Variation in value

What is the flywheel responsible for?

To keep the crankshaft in place

Gives the crankshaft momentum to carry the pistons through the compression stroke.

To connect the crankshaft to the pistons

To provide power to the crankshaft

What is the unit in which work is measured?

Watt

Newton

Foot pound

Joule

Which of the following is NOT a type of engine?

Wankel engine

Four-stroke engine

Two-stroke engine

Diesel engine

What is the part of an engine between the cylinders and the bedplate?

Cylinders

Framing

Crankcase

Bedplate

What is friction?

The force that causes two surfaces to slide past each other.

The force that one object exerts on another object.

A measure of the amount of wear on a surface.

The resistance to relative motion between two bodies in contact.

What is friction horsepower?

The power consumed within the engine from friction between its parts.

The power lost to friction when an object is moved.

The power required to move an object across a surface.

The power generated by the engine to overcome friction.

What is the device which sprays the fuel into the cylinder called?

Carburetor

Ignition Coil

Fuel Pump

Fuel Injector

What is the noise produced in the cylinder of a diesel engine during combustion called?

Engine knock

Timing knock

Fuel knock

Lack of knock

What is the function of the fuel pump?

Injects the fuel into the engine

Stores the fuel

Start the engine

Delivers the fuel to the injector

What is the term for the support on which a lever turns?

Weight

Point

Fulcrum

Center

What is a gasket?

A device used to measure the volume of a liquid

A type of adhesive tape

Packing placed between two surfaces that must have a leakproof joint.

A tool used in carpentry

What is a governor?

A mechanism used to control the speed of an engine.

A device that closes and opens a valve

A state official with ranking authority

A machine that produces rotary motion

What is heat?

A form of energy

A lightbulb

The element of fire

A measure of hotness

What is the unit of heat?

Calorie (cal)

Watt (W)

Joule (J)

British thermal unit (Btu)

What is the heat value?

The rate of heat flow

The heat developed by the combustion of one pound of fuel

The average temperature of the Earth's surface

The amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit

What is the unit of heat value?

Calories per second

Joules per second

Btu per Pound

Btu per second