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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. Weight/Time
Power Equation
Third Stroke (rotary)
Fourth Stroke (rotary)
Hybrid Parallel
2. Energy may enter or leave. No mass enters or leaves the system i.e. Closed water bottle - car engine - human
Closed System
Direction of Forces
Surroundings
Shear
3. Piston travels up and both plugs are closed
Second Stroke (4 Stroke Engine)
Hydrodynamics
Fluid
Volume
4. Rotation will not occur - but translation might occur
Area
If the force is applied at the center of the rotation
Mechanical Advantage Equation
Units for Pressure
5. Mass can neither by created nor destroyed - only transformed
Mechanics describe how forces affect a body
Drum Brakes
Tension
Law of Conservation of Mass
6. Brake pedal and linkage - Master Cylinder - Wheel cylinders (4) - Hydraulic lines - Hydraulic fluid - Mechanical advantage is provided by the foot pedal to the booster (level) - A greater force is applied on the wheel cylinders than on the brake peda
Direction of Forces
Result of Applying a force to a rigid body at rest
Applied Brakes
Hybrid
7. Translation (slide) -Rotate -Slide and Rotate Together
Pressure Equation
Torque
Component
Result of Applying a force to a rigid body at rest
8. A flat - sloping surface -The only simple machine that does not move -The force is applied to the ramp - since this is the direction the load weight is moved -Sloping side is longer than vertical side -Less force is required to accomplish the same am
Compression
Inclined Plane
Area of a circle equation
Fluid Power
9. One that pushes on an object
Area of a circle equation
Hybrid Series
If the force is applied at the center of the rotation
Compression
10. Both engines drive wheels -ICE used for cruising -Electric motor assists with low speed for acceleration and hill climbing
Couple
First Stroke (2 Stroke Engine)
Hybrid Parallel
Mechanics
11. Combustion of fuel mixture ignited by spark plug
Rotary
Second Stroke (2 Stroke Engine)
Gravity
Equation for Mechanical Advantage regarding inclined planes
12. 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
Area Equation
Static
no movement
Machine
13. For every action there is an equal and opposite reaction -Force -F=mg -Earth exerts a force on all of us
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14. Two stroke- Four Stroke- Diesel-Rotary -Hybrid
Open System
Internal Combustion Engine Types
Pythagorean Theorem Equation
Effort
15. Same pressure - work - volume - Different forces and distances
Mechanics
Hydraulic Cylinders
Steam Engine
Surroundings
16. The force simple machines use to do work on a single load or against a single force
Power
Effort
Closed System
Second Stroke (2 Stroke Engine)
17. ICE generates electricity for electric battery -Electric motor turns wheels
Hybrid Series
Statics
Rotation
First Stroke (2 Stroke Engine)
18. Force without machine/Force with machine
Power Equation
Mechanical Advantage Equation
Mechanical Advantage
Moment Arm
19. Piston travels down and intake valve is opened. Intake of fuel and air into chamber
If the force is applied away from the center of rotation
US Customary
First Stroke (4 Stroke Engine)
Mechanical Engineering
20. Length x Width x Height
Volume
Mechanics describe how forces affect a body
Component
Fluid
21. When two parallel forces equal in magnitude and opposite direction - i.e. steering wheel - turn a know - turn on and off a faucet
Couple
Volume
Applied Brakes
Pythagorean Theorem
22. 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
Acceleration
Aerodynamics
Rotary
Hydraulics
23. Can be reduced by decreasing the weight or force or increasing the area i.e. airbag
Pythagorean Theorem
If the force is applied away from the center of rotation
Units
Pressure
24. 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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25. A pull on an object
Tension
First Stroke (4 Stroke Engine)
Hydraulic Cylinders
Dynamics
26. The magnitude of something in a particular direction
Fourth Stroke (rotary)
Length
Disc Breaks
Units
27. Varies by location (on earth) - distance (from earth) - and mass (of planet)
Conversions
Gravity
Equilibrium
Units
28. External Combustion engine -Only used in factories and plants (not used in cars)
Second Stroke (Diesel Engine)
Conversions
Pythagorean Theorem
Steam Engine
29. 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
Gravity
Common Brake Characteristics
Conversions
Rotation
30. When a simple machine increases a force it is at the expense of a ____ in the distance the load is moved
Area Equation
Open System
System International (SI)
decrease
31. A^2+b^2=c^2 - used to calculate vectors
Area
decrease
Pythagorean Theorem
Fourth Stroke (4 Stroke Engine)
32. Used to measure or quantify -US Common: Absolute and Gravitational -SI: absolute
Forces
Area of a circle equation
Units
Pythagorean Theorem
33. Four Stroke Engine -Used in hotter areas because more efficient -Higher compression ratio than gasoline
Moment Arm Equation
Forces and Vectors
Second Stroke (2 Stroke Engine)
Diesel Engine
34. When fluid is at rest
Power Equation
Hydrostatics
Drum Brakes
Units for Pressure
35. Describes how applied forces bring a body into motion
Dimension
Dynamics
Closed System
Conversions
36. (Force)(Distance)/Seconds
Common Brake Characteristics
Mechanical Engineering
Shear
Power Equation
37. Incompressible (volume doesnt change) Transmit force evenly - Lubricates - Trap contaminants - Some based on vegetable oils - Biodegradable - Aircraft fluids noncombustible (thins as temperature rises)
System International (SI)
System
Fluids
Forces and Vectors
38. Body in motion (car)
Equilibrium
Dynamics
First Stroke (4 Stroke Engine)
First Stroke (2 Stroke Engine)
39. Used in cars -2 rotations of crankshaft -4 strokes (down - up - down - up) of piston - i.e. cars - trucks - planes - buses - motorcycles - submarine -1% of gas actually moves people
4 Stroke Engine
Volume
Dynamics
Translation
40. Length x Width
Second Stroke (4 Stroke Engine)
Newton's Second Law
Second Stroke (Diesel Engine)
Area Equation
41. When the moving fluid is a gas
Second Stroke (2 Stroke Engine)
Newton's Second Law
Aerodynamics
Area
42. Intake of fuel and air mix
First Stroke (rotary)
Power Equation
Work
Hybrid
43. Movement along a line (reciprocal or linear motion) -Units: feet and meters
Fourth Stroke (Diesel Engine)
Power
Translation
Dimension
44. A small piece that makes up a larger whole. Each component is there for a specific job - but the sum of components
Component
Statics
Rotary
Conversions
45. A combination of components
Rotary
Compression
Machine
System
46. The standard system of units that uses base 10 and used in the rest of the world. US does not use - but Great Britain does - Base Units: mass - kilograms (kg) - length- meters (m) - and time-Seconds (S) - Force is a derived unit measured in newtons (
System International (SI)
Static
Pascal's Principle
First Stroke (4 Stroke Engine)
47. Compression-Tension-Shear
Length
Direction of Forces
Dynamics
First Stroke (4 Stroke Engine)
48. Old technology- harder to service-Still used on big trucks and trailers because they are too expensive to convert
Pythagorean Theorem
Drum Brakes
Forces and Vectors
Hydrodynamics
49. Air is compressed - work is done on the system
Newton's Third Law
Hydraulic Cylinders
Second Stroke (Diesel Engine)
More than one force
50. A movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)
decrease
Closed System
Torque
Rotation