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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. Work/force or vertical distance/sloping distance
First Stroke (rotary)
Units for Pressure
Equation for Mechanical Advantage regarding inclined planes
Inclined Plane
2. Air is drawn in
First Stroke (Diesel Engine)
Gravity
Metrology
Newton's First Law of Motion
3. Movement along a line (reciprocal or linear motion) -Units: feet and meters
Drum Brakes
Aerodynamics
more than one force
Translation
4. A fluid power system uses hydraulics and a fluid under pressure to create a greater force than is applied
Length
Fluid Power
Torque
Second Stroke (rotary)
5. Incompressible (volume doesnt change) Transmit force evenly - Lubricates - Trap contaminants - Some based on vegetable oils - Biodegradable - Aircraft fluids noncombustible (thins as temperature rises)
If the force is applied at the center of the rotation
Inclined Plane
Fluids
Open System
6. When two parallel forces equal in magnitude and opposite direction - i.e. steering wheel - turn a know - turn on and off a faucet
Effort
Couple
decrease
Mechanics
7. Force without machine/Force with machine
Statics
Mechanical Advantage Equation
Compression
Fourth Stroke (Diesel Engine)
8. When a simple machine increases a force it is at the expense of a ____ in the distance the load is moved
Shear
First Stroke (rotary)
decrease
Base Dimensions
9. Can be reduced by decreasing the weight or force or increasing the area i.e. airbag
Derived Dimension
Pressure
Dynamics
Conversions
10. (Force)(Distance)/Seconds
Hybrid Series
Moment Arm Equation
Power Equation
Common Brake Characteristics
11. Ignition - power stroke
Translation
Third Stroke (rotary)
First Stroke (2 Stroke Engine)
First Stroke (rotary)
12. Length x Width x Height
Hydraulics
Volume
Static
Power Equation
13. Used to measure or quantify -US Common: Absolute and Gravitational -SI: absolute
Units
Closed System
Hydrostatics
Volume
14. When the work done by the effort just equals the work done by the load - ______ of the machine will occur
no movement
Forces and Vectors
Pressure
Effort
15. Length / Time
Torque
Hybrid Series
Velocity
If the force is applied at the center of the rotation
16. 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
Area
Power Equation
Diesel Engine
Mass
17. A movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)
Pythagorean Theorem
Metrology
Rotation
Length
18. Four Stroke Engine -Used in hotter areas because more efficient -Higher compression ratio than gasoline
Moment Arm
Law of Conservation of Mass
Volume
Diesel Engine
19. An application of Pascal's Principle (trading distance and force while doing the same amount of work) -Gives a mechanical advantage -The muscles of machines - used to produce very large forces - use a fluid under pressure (gas is low pressure and liq
Forces
Hydraulics
Fluid
If the force is applied away from the center of rotation
20. Rotation will not occur - but translation might occur
Second Stroke (Diesel Engine)
Power Equation
Translation
If the force is applied at the center of the rotation
21. External Combustion engine -Only used in factories and plants (not used in cars)
no movement
Third Stroke (4 Stroke Engine)
Mass
Steam 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
Power
Torque
Second Stroke (rotary)
23. Result of gravity acting on mass -The greater the mass - the greater the weight -Is a force -Units: lbs - N
Newton's Third Law
Units for Pressure
Weight
Equilibrium
24. One that pushes on an object
Hydraulics
Units for Pressure
Compression
Units
25. A change in velocity over time -Unites: USA- ft/s^2 and SI: m/s^2
Forces
Steam Engine
Acceleration
Mechanical Advantage
26. A^2+b^2=c^2
US Customary
Pressure
Pythagorean Theorem Equation
Metrology
27. Psi - newtons - pascals
Units for Pressure
Weight
Fourth Stroke (4 Stroke Engine)
Aerodynamics
28. Causes acceleration -Units: USA: 32.2 ft/s^2 SI: 9.8 m/sec^2
Couple
Equation for Mechanical Advantage regarding inclined planes
Second Stroke (Diesel Engine)
Gravity
29. Old technology- harder to service-Still used on big trucks and trailers because they are too expensive to convert
Second Stroke (2 Stroke Engine)
decrease
First Stroke (4 Stroke Engine)
Drum Brakes
30. Describes how applied forces bring a body into rest or equilibrium
Statics
Newton's Second Law
Area Equation
Weight
31. If a force causes rotations -Vector- Machines can have more than one torque-Units: foot- pound and newton - meter - i.e. engines - airplanes - propeller
Rotary
decrease
2 Stroke Engine
Torque
32. 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
Steam Engine
Pythagorean Theorem
First Stroke (Diesel Engine)
Hybrid
33. Body in motion (car)
Second Stroke (Diesel Engine)
Dynamics
Volume
Disc Breaks
34. Can be applied:-By direct contact: push - pull - twist -At a distance: gravity - magnetism Can change: speed - direction - shape - units of force
Common Brake Characteristics
Forces
Equation for Mechanical Advantage regarding inclined planes
Power Equation
35. 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)
Power
Power Equation
Open System
Fluid
36. Two stroke- Four Stroke- Diesel-Rotary -Hybrid
Dimension
Component
Internal Combustion Engine Types
more than one force
37. 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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38. Combustion ignited by spark plug and materials are compressed
Third Stroke (4 Stroke Engine)
Gravity
Shear
Mechanical Advantage Equation
39. Translation (slide) -Rotate -Slide and Rotate Together
Dynamics
Second Stroke (rotary)
Gravity
Result of Applying a force to a rigid body at rest
40. 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
Fourth Stroke (Diesel Engine)
Machine
decrease
Equation for Mechanical Advantage regarding inclined planes
41. ...
Force lets us do work on a system
Hybrid
Velocity
Mechanical Advantage Equation
42. 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
Vectors
Effort
Hydraulics
System International (SI)
43. Rotation may occur
First Stroke (4 Stroke Engine)
If the force is applied away from the center of rotation
System International (SI)
will move
44. A^2+b^2=c^2 - used to calculate vectors
Dynamics
Pythagorean Theorem
Hydrodynamics
Fourth Stroke (4 Stroke Engine)
45. Result of a force moving an object against a resistance through some distance in a desired direction -Work transfers energy -Work is a measure of what is done and not the effort applied - Done by lifting - pushing - rotating - or sliding -W=Fd -F=Amo
Work
Mechanical Advantage
Fourth Stroke (rotary)
Drum Brakes
46. The force simple machines use to do work on a single load or against a single force
Effort
First Stroke (4 Stroke Engine)
Fourth Stroke (Diesel Engine)
Units
47. A small piece that makes up a larger whole. Each component is there for a specific job - but the sum of components
Pythagorean Theorem
Dynamics
Vectors
Component
48. 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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49. Describes how applied forces bring a body into motion
Velocity
Hybrid Parallel
Dynamics
Hydrostatics
50. When the work done by the effort exceeds the work done by the load - the load...
decrease
will move
Mechanical Advantage
Newton's Second Law