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Test your basic knowledge |
Mechanical Engineering
Start Test
Study First
Subject
:
engineering
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Length x Width
Equation for Mechanical Advantage regarding inclined planes
Force lets us do work on a system
Disc Breaks
Area Equation
2. Force and mass are proportional to each other (F=ma) -If F increases - so does acceleration -Force causes acceleration - More force means more acceleration - same mass - More mass means less acceleration - same force
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3. Body at rest or is in equilibrium (wall)
will move
Static
Closed System
Pascal's Principle
4. Describes a physical property of anything - What we are measuring
Power Equation
Disc Breaks
Dimension
Second Stroke (Diesel Engine)
5. 1. Magnitude: size - a numberi.e. 50 mph 2. Direction: angle i.e. N -E -W -S
Law of Conservation of Mass
First Stroke (2 Stroke Engine)
Forces and Vectors
Mechanical Advantage
6. A system adopted from an old British system of units in the 13th century -Engineering system -Units: length- foot (ft) - time- second (s) - force-(lbs) - Mass is a derived unit called a slug -Political/Economic choice -Awkward
US Customary
Static
Mass
Acceleration
7. Piston travels down and intake valve is opened. Intake of fuel and air into chamber
Couple
Law of Conservation of Mass
Hydraulic Cylinders
First Stroke (4 Stroke Engine)
8. What we are studying
System
Open System
First Stroke (rotary)
4 Stroke Engine
9. Force/Area
Derived Dimension
Law of Conservation of Mass
Pressure Equation
Equilibrium
10. Force x Distance
Moment Arm Equation
Power Equation
Conversions
Vectors
11. A flat - two dimensional property -Units of length multiplied by length describe area -A=length x width
Hydrostatics
Component
Area
decrease
12. Intake of fuel and air mix
Metrology
Torque
First Stroke (rotary)
First Stroke (2 Stroke Engine)
13. Describes how applied forces bring a body into motion
Closed System
Dynamics
more than one force
Power Equation
14. Piston travels up and both plugs are closed
Gravity
System International (SI)
Diesel Engine
Second Stroke (4 Stroke Engine)
15. A combination of components
Machine
System
Units
Static
16. Length x Width x Height
More than one force
will move
Pascal's Principle
Volume
17. Air is drawn in
System International (SI)
Units for Pressure
First Stroke (Diesel Engine)
If the force is applied at the center of the rotation
18. Used to measure or quantify -US Common: Absolute and Gravitational -SI: absolute
Rotation
4 Stroke Engine
If the force is applied away from the center of rotation
Units
19. A pull on an object
More than one force
Second Stroke (2 Stroke Engine)
Tension
Statics
20. Ignition - power stroke
Pressure
Power Equation
Third Stroke (rotary)
Vectors
21. Combine two or more power sources - locomotives - buses (diesel- electric) -Submarines (Nuclear- electric) -Components:gas engine - fuel tank - electric motor - generator - batteries - transmission -2 motors: Internal Combustion Engine and Electric E
Rotation
Volume
Hybrid
If the force is applied away from the center of rotation
22. Length / Time
First Stroke (Diesel Engine)
Second Stroke (2 Stroke Engine)
Units for Pressure
Velocity
23. Friction changes KE to heat energy- Heat is transferred to air- Front brakes work harder than rear- Some brakes use asbestos- Newer cars have dual braking systems - Don't drive through water or your brakes won't work well (ride breaks to dry them out
Common Brake Characteristics
Dynamics
Fourth Stroke (Diesel Engine)
Units for Pressure
24. Piston travels up and exhaust valve opens. Combustion by product exhaustion
Fourth Stroke (Diesel Engine)
Fourth Stroke (4 Stroke Engine)
Third Stroke (4 Stroke Engine)
Area
25. Can be applied:-By direct contact: push - pull - twist -At a distance: gravity - magnetism Can change: speed - direction - shape - units of force
Rotary
Forces
Acceleration
Units
26. Work/force or vertical distance/sloping distance
Equation for Mechanical Advantage regarding inclined planes
Moment Arm Equation
Area Equation
Force lets us do work on a system
27. (pi) x (radius)^2
Power
Mechanics
Area of a circle equation
Shear
28. When fluid is at rest
Hydrostatics
Steam Engine
Velocity
Units for Pressure
29. Air is compressed - work is done on the system
decrease
Second Stroke (Diesel Engine)
Dynamics
Fourth Stroke (4 Stroke Engine)
30. The amount of atoms and molecules in something - Matter is energy that has become solid -An object gains mass when it gains more energy and vice a versa -Units: SI- kgs and USA: Slugs - lbs
More than one force
Mass
Force Equation
Work
31. The force simple machines use to do work on a single load or against a single force
Gravity
Effort
Mechanics
System International (SI)
32. Three- dimensional property measured in units of length times length times length =length x width x height
Volume
Hydraulics
Dynamics
Direction of Forces
33. Mass can neither by created nor destroyed - only transformed
Mechanical Engineering
Equation for Mechanical Advantage regarding inclined planes
Static
Law of Conservation of Mass
34. Tells us how fast work is done - varies with time (more power is needed to do work in less time - and less power is needed to do work in more time) =Fd/s -Units: USA: ft- lb/s SI: watts (J/S)
Hydrodynamics
Power
Second Stroke (Diesel Engine)
Engineers and scientists need a common language
35. Psi - newtons - pascals
Units for Pressure
Metrology
Fluid Power
Hydraulics
36. When the work done by the effort exceeds the work done by the load - the load...
US Customary
Power
will move
no movement
37. Both engines drive wheels -ICE used for cruising -Electric motor assists with low speed for acceleration and hill climbing
Hybrid Parallel
Newton's Second Law
Common Brake Characteristics
Derived Dimension
38. A movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)
Vectors
Fourth Stroke (Diesel Engine)
Rotation
Translation
39. Varies by location (on earth) - distance (from earth) - and mass (of planet)
Force lets us do work on a system
Steam Engine
Gravity
Dynamics
40. Causes acceleration -Units: USA: 32.2 ft/s^2 SI: 9.8 m/sec^2
Base Dimensions
Gravity
Open System
First Stroke (2 Stroke Engine)
41. More compact (size of beer keg) - No valves -Benefits: fewer parts - lower engine weight Problems: seal - lower inertia forces -1 rotar=3 to 4 pistons
Velocity
Torque
Third Stroke (Diesel Engine)
Rotary
42. If the force needed to operate the machine (input force) is less than the force being opposed or the load being moved (output force) -The ratio of the output force divided by the input force -If the number is greater than one - there is a mechanical
Fourth Stroke (Diesel Engine)
Mechanical Advantage
will move
Hydrostatics
43. An indication of kinetic energy of mass at the molecular level
System
Engineers and scientists need a common language
Temperature
Second Stroke (rotary)
44. Every object continues in motion in a straight line unless acted upon by some force -Every object at rest continues at rest unless acted upon by a force -So forces cause a change in an object's state of motion
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45. A device that uses energy to do work to accomplish some desired activity - They do not produce energy - but they do transmit and transform energy - Machines can transmit a force - control its motion - and change its direction - a system of components
Compression
Fourth Stroke (rotary)
System International (SI)
Machine
46. Weight/Time
Power Equation
will move
Diesel Engine
Result of Applying a force to a rigid body at rest
47. Modern Technology- More efficient-Better Cooling-Easier to service- longer life - lither weight- More expensive
Third Stroke (4 Stroke Engine)
Volume
Disc Breaks
Second Stroke (4 Stroke Engine)
48. ICE generates electricity for electric battery -Electric motor turns wheels
US Customary
Fourth Stroke (rotary)
Hydrodynamics
Hybrid Series
49. Mechanics is an application of math that describes how forces affect a body
Mechanics
Direction of Forces
Fourth Stroke (rotary)
Force Equation
50. One that pushes on an object
Compression
System International (SI)
Second Stroke (2 Stroke Engine)
Hydrostatics