Mechanical Engineering Quiz # 2

Newton's law of cooling states that the rate of heat loss of a body is proportional to:

the absolute temperature of the body

the absolute temperature of the surrounding

the difference in temperatures between the body and its surroundings

Which of these manufacturing processes involves pouring liquid metal into a mould?

casting

forging

forming

welding

Total mechanical energy is the sum of what two forms of energy?

Kinetic Energy and Potential Energy

Used energy and unused energy

Mechanical energy and electrical energy

Static energy and dynamic energy

True or False: All matter with a temperature greater than absolute zero emits thermal radiation.

True

False

How do we describe the property of an object or material which will restore it to its original shape after distortion?

Strength

Elasticity

Rigidity

Flexibility

What are the three basic methods of heat tranfser?

Thermal, Osmosis and Linear

Steam, Flame and Hydronic

Tactile, Friction, and Combustion

Conduction, Convection and Radiation

What term describes the calculations related to objects with greater than zero velocity?

Moving parts

Actives

Dynamics

Statics

What is a tool used for stamping metal by a press?

clamp

jig

mould

die

What is one advantage of multi-stage centrifugal pump configurations over single-stage centrifugal pump configurations?

Higher pressures can be derived

Lower pressures can be derived

Lower volumes can be derived

Higher volume can be derived

Which of these is a turbine for hydro power?

Carnot wheel

Ericsson wheel

Pelton wheel

Which type of gear meshing should be employed to transmit torque to a linear force?

Rack and Pinion

Epicyclic gear

Helical gear

Bevel gear

How many degrees of freedom does a rigid body have in three dimensional space?

six

one

four

three

Which mechanism can convert rotational motion to reciprocating motion?

spring

gear train

pendulum

slider-crank

What is the simple mechanics description of a force acting upon an object to cause a displacement of the object?

Movement

Work

Action

Motion

Which stress acts in parallell with the cross section of a material?

shear

compression

normal

tension

What is the unit of measurement defined as "the amount of heat needed to raise 1 pound of water 1 degree"?

Farenheit

Watt

BTU

Ampere

What is constant in an isochoric process?

temperature

pressure

volume

Which of these factors least affects the heat dissipation by a heat sink?

surface area exposed to air

material of heat sink

mechanical pressure on heat sink

Which term is used to describe the angle of the cutting face relative to the cutting work?

Slice angle

Strike angle

Leverage angle

Rake angle

What type of deformation may take place when large amounts of tensile strain are localized in a small area of a material?

Crinkling

Smashing

Necking

Crunching

Which chemical can be added to a closed loop system to prevent freezing?

Glycol

Molybdate

Nitrite

Ammonia

What is the purpose of simple machines such as pulleys and levers?

To create mechanical advantage.

To establish geometric ratios

To lift heavy objects

Levers and pulleys are not considered simple machines.

What force describes the principle of Newton's second Law of Motion that objects naturally resist changes to their course of motion?

Inertia

Acceleration

Balance

Momentum

What is the function of a feeler gauge?

to measure pitch of screw

To check thickness of clearance

to measure surface roughness

To measure radius of circular rod

When a material is compressed in one direction, it tends to expand in the other two directions perpendicular to the direction of compression. What is this effect called?

transverse effect

Bulk material change

Young's Effect

Poisson Effect

What is another name for a gear traing's torque ratio?

linkage constant

mechanical advantage

speed factor

Which of these is NOT a state function?

pressure

heat

temperature

volume

What can be done to increase the capacity of a plate frame heat exchanger?

Install additional plates

Increase motor horsepower

Increase temperature delta

Increase motor rpm

What kind of an engine does an Otto cycle describe?

compression ignition

hydraulic ignition

spark ignition

What is designed into gear sets to provide the proper amount of teeth clearance to avoid binding?

Angled openings

Dead space

Gapped teeth

Backlash