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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. Incompressible (volume doesnt change) Transmit force evenly - Lubricates - Trap contaminants - Some based on vegetable oils - Biodegradable - Aircraft fluids noncombustible (thins as temperature rises)
Mass
More than one force
Fluids
Steam Engine
2. Three- dimensional property measured in units of length times length times length =length x width x height
2 Stroke Engine
Volume
Hybrid Series
Second Stroke (Diesel Engine)
3. Force x Distance
Third Stroke (rotary)
Third Stroke (4 Stroke Engine)
Surroundings
Moment Arm Equation
4. Derived from - or composed of - base dimensions i.e. Area (length x width) - Weight (mass x acceleration) - velocity (length/time)
Derived Dimension
Rotation
Engineers and scientists need a common language
Second Stroke (Diesel Engine)
5. Compression-Tension-Shear
Direction of Forces
Hybrid Series
System
Hydrodynamics
6. A quantity that has both magnitude and direction when placed within a coordinate system -Forces and Velocity i.e. driving 50 miles to the northeast
Acceleration
Rotation
2 Stroke Engine
Vectors
7. In a right triangle - the sum of the squares of the sides equals the square of the hypotenous
Pythagorean Theorem
Fluids
Mechanical Advantage Equation
Result of Applying a force to a rigid body at rest
8. Describes how applied forces bring a body into rest or equilibrium
Effort
Second Stroke (4 Stroke Engine)
Statics
Rotation
9. (pi) x (radius)^2
Area of a circle equation
Torque
Power Equation
Gravity
10. 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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11. Intake of fuel and air mixture - compression of mixture by piston
Gravity
First Stroke (2 Stroke Engine)
Direction of Forces
Aerodynamics
12. What we are not studying
Fluid
Surroundings
More than one force
Acceleration
13. A^2+b^2=c^2
Disc Breaks
Pythagorean Theorem Equation
First Stroke (2 Stroke Engine)
Open System
14. A flat - two dimensional property -Units of length multiplied by length describe area -A=length x width
Moment Arm
More than one force
Area
Fluid Power
15. A pull on an object
System International (SI)
Tension
Open System
Force Equation
16. 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 (
Result of Applying a force to a rigid body at rest
System International (SI)
no movement
Base Dimensions
17. Four Stroke Engine -Used in hotter areas because more efficient -Higher compression ratio than gasoline
Equilibrium
Work
decrease
Diesel Engine
18. Length x Width x Height
Volume
Work
Rotation
Moment Arm
19. 1. Magnitude: size - a numberi.e. 50 mph 2. Direction: angle i.e. N -E -W -S
Moment Arm
Effort
Forces and Vectors
First Stroke (Diesel Engine)
20. A change in velocity over time -Unites: USA- ft/s^2 and SI: m/s^2
Metrology
Acceleration
Power
Steam Engine
21. Same pressure - work - volume - Different forces and distances
Mass
Hydraulic Cylinders
Tension
2 Stroke Engine
22. 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
If the force is applied at the center of the rotation
Area of a circle equation
Translation
23. When the fluid is in motion
Hydrodynamics
Volume
Effort
Result of Applying a force to a rigid body at rest
24. Liquid or gas
Velocity
Fluid
more than one force
Aerodynamics
25. Translation (slide) -Rotate -Slide and Rotate Together
more than one force
Mechanical Advantage Equation
Common Brake Characteristics
Result of Applying a force to a rigid body at rest
26. 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
Forces
Mechanical Advantage
Pressure Equation
Temperature
27. Length / Time
Fluid Power
Velocity
If the force is applied at the center of the rotation
Compression
28. Compression of fuel mix
Vectors
Engineers and scientists need a common language
Power Equation
Second Stroke (rotary)
29. 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
Fluid
Machine
First Stroke (2 Stroke Engine)
will move
30. Intake of fuel and air mix
Third Stroke (Diesel Engine)
First Stroke (rotary)
Mechanics describe how forces affect a body
Statics
31. A movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)
Compression
Disc Breaks
Rotation
Mechanics describe how forces affect a body
32. Static - Dynamic
Component
Mechanics describe how forces affect a body
Hybrid Parallel
Force lets us do work on a system
33. Combustion of fuel mixture ignited by spark plug
Second Stroke (2 Stroke Engine)
Hydraulics
4 Stroke Engine
Internal Combustion Engine Types
34. Are independent of other dimensions - They are limited in number - length - mass - time - temperature - force
Base Dimensions
no movement
Machine
Closed System
35. 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
Forces and Vectors
Forces
4 Stroke Engine
Newton's First Law of Motion
36. Mass can neither by created nor destroyed - only transformed
Moment Arm Equation
Equation for Mechanical Advantage regarding inclined planes
System
Law of Conservation of Mass
37. Air is compressed - work is done on the system
Power Equation
Volume
First Stroke (rotary)
Second Stroke (Diesel Engine)
38. Dimensions and units
Forces and Vectors
Pythagorean Theorem
Mechanical Engineering
Engineers and scientists need a common language
39. Combustion ignited by spark plug and materials are compressed
Third Stroke (4 Stroke Engine)
Power Equation
More than one force
Vectors
40. Energy may enter or leave. Mass can enter or leave the system i.e. open water bottle - molecule - hydraulic cylinder - human
Mechanical Advantage Equation
Open System
Pressure Equation
Newton's Third Law
41. Old technology- harder to service-Still used on big trucks and trailers because they are too expensive to convert
Forces
Moment Arm
Drum Brakes
Pressure Equation
42. Exhaust
4 Stroke Engine
Fourth Stroke (Diesel Engine)
Rotation
Dynamics
43. Describes how applied forces bring a body into motion
Second Stroke (2 Stroke Engine)
Applied Brakes
Dynamics
decrease
44. When the work done by the effort just equals the work done by the load - ______ of the machine will occur
no movement
Mechanical Engineering
4 Stroke Engine
Third Stroke (Diesel Engine)
45. Two stroke- Four Stroke- Diesel-Rotary -Hybrid
First Stroke (4 Stroke Engine)
Length
Fourth Stroke (Diesel Engine)
Internal Combustion Engine Types
46. When two parallel forces equal in magnitude and opposite direction - i.e. steering wheel - turn a know - turn on and off a faucet
Vectors
decrease
Weight
Couple
47. 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
Applied Brakes
First Stroke (4 Stroke Engine)
Gravity
2 Stroke Engine
48. Fuel is injected and combusts due to temperature of compressed air
Third Stroke (Diesel Engine)
Base Dimensions
Mechanics describe how forces affect a body
Hybrid Parallel
49. Both engines drive wheels -ICE used for cruising -Electric motor assists with low speed for acceleration and hill climbing
Drum Brakes
Component
Hybrid Parallel
Compression
50. An indication of kinetic energy of mass at the molecular level
more than one force
Area of a circle equation
Mechanical Advantage Equation
Temperature