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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. When the work done by the effort exceeds the work done by the load - the load...
Units for Pressure
will move
Dimension
Newton's Second Law
2. Force without machine/Force with machine
Torque
Dimension
Mechanical Advantage Equation
Rotary
3. Air is drawn in
Mechanical Advantage Equation
Newton's Third Law
First Stroke (Diesel Engine)
Rotation
4. 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
System
Third Stroke (Diesel Engine)
Hybrid
5. Rotation will not occur - but translation might occur
If the force is applied at the center of the rotation
Closed System
Statics
Area
6. Liquid or gas
4 Stroke Engine
Volume
Hydraulic Cylinders
Fluid
7. When the work done by the effort just equals the work done by the load - ______ of the machine will occur
no movement
Moment Arm Equation
Third Stroke (Diesel Engine)
Second Stroke (4 Stroke Engine)
8. Energy may enter or leave. No mass enters or leaves the system i.e. Closed water bottle - car engine - human
Units for Pressure
Statics
Closed System
Force lets us do work on a system
9. When the moving fluid is a gas
Mechanics
More than one force
Fluid Power
Aerodynamics
10. For every action there is an equal and opposite reaction -Force -F=mg -Earth exerts a force on all of us
11. 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 (
Engineers and scientists need a common language
Power Equation
System International (SI)
Translation
12. A^2+b^2=c^2
Mechanical Engineering
Fourth Stroke (4 Stroke Engine)
Pythagorean Theorem Equation
Third Stroke (rotary)
13. Are independent of other dimensions - They are limited in number - length - mass - time - temperature - force
Base Dimensions
Derived Dimension
Applied Brakes
System International (SI)
14. External Combustion engine -Only used in factories and plants (not used in cars)
Steam Engine
Common Brake Characteristics
Machine
Mechanical Advantage Equation
15. When the sum of all forces and the sum of all moments both equal forces - No movement
Vectors
Equilibrium
Second Stroke (2 Stroke Engine)
Third Stroke (4 Stroke Engine)
16. Force x Distance
Moment Arm Equation
Volume
Fourth Stroke (4 Stroke Engine)
Internal Combustion Engine Types
17. ICE generates electricity for electric battery -Electric motor turns wheels
Hybrid Series
Closed System
will move
Derived Dimension
18. Compression-Tension-Shear
Direction of Forces
Hybrid Parallel
Third Stroke (4 Stroke Engine)
Hydraulics
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
Direction of Forces
Third Stroke (4 Stroke Engine)
Hydraulics
Steam Engine
20. Mass x acceleration
System
Force Equation
Metrology
Third Stroke (4 Stroke Engine)
21. Fuel is injected and combusts due to temperature of compressed air
Third Stroke (Diesel Engine)
decrease
Torque
Length
22. When fluid is at rest
Forces
If the force is applied at the center of the rotation
Hybrid Series
Hydrostatics
23. 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
24. Piston travels up and both plugs are closed
4 Stroke Engine
Second Stroke (4 Stroke Engine)
Pressure Equation
Couple
25. Two stroke- Four Stroke- Diesel-Rotary -Hybrid
Third Stroke (rotary)
Internal Combustion Engine Types
Component
Pressure
26. 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
Mass
4 Stroke Engine
Conversions
Second Stroke (Diesel Engine)
27. The force simple machines use to do work on a single load or against a single force
Effort
Moment Arm Equation
Volume
If the force is applied away from the center of rotation
28. A movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)
Conversions
First Stroke (rotary)
Weight
Rotation
29. Can be applied at a time on an object
2 Stroke Engine
Forces
More than one force
Fluids
30. Intake of fuel and air mix
System International (SI)
4 Stroke Engine
First Stroke (rotary)
More than one force
31. Movement along a line (reciprocal or linear motion) -Units: feet and meters
Mechanics
Translation
more than one force
Force lets us do work on a system
32. Derived from - or composed of - base dimensions i.e. Area (length x width) - Weight (mass x acceleration) - velocity (length/time)
Derived Dimension
Second Stroke (2 Stroke Engine)
Hydrostatics
Base Dimensions
33. Describes how applied forces bring a body into rest or equilibrium
Second Stroke (2 Stroke Engine)
Pressure Equation
Forces
Statics
34. Old technology- harder to service-Still used on big trucks and trailers because they are too expensive to convert
decrease
Drum Brakes
Length
Common Brake Characteristics
35. A small piece that makes up a larger whole. Each component is there for a specific job - but the sum of components
Component
Pythagorean Theorem
Hydrostatics
Surroundings
36. Same pressure - work - volume - Different forces and distances
Forces
4 Stroke Engine
Area Equation
Hydraulic Cylinders
37. Incompressible (volume doesnt change) Transmit force evenly - Lubricates - Trap contaminants - Some based on vegetable oils - Biodegradable - Aircraft fluids noncombustible (thins as temperature rises)
Fluids
Aerodynamics
Mechanical Engineering
Velocity
38. An indication of kinetic energy of mass at the molecular level
Temperature
If the force is applied away from the center of rotation
Force lets us do work on a system
Diesel Engine
39. 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
Dynamics
Third Stroke (Diesel Engine)
Machine
Second Stroke (rotary)
40. A pull on an object
Tension
Direction of Forces
Pythagorean Theorem
System
41. A^2+b^2=c^2 - used to calculate vectors
Common Brake Characteristics
Dynamics
Pythagorean Theorem
Hybrid Series
42. Compression of fuel mix
Power Equation
Closed System
Second Stroke (4 Stroke Engine)
Second Stroke (rotary)
43. A fluid power system uses hydraulics and a fluid under pressure to create a greater force than is applied
If the force is applied away from the center of rotation
Hydrodynamics
Fluid Power
Vectors
44. Applied at an angle or parallel to a surface
Newton's Second Law
First Stroke (Diesel Engine)
First Stroke (rotary)
Shear
45. Used to measure or quantify -US Common: Absolute and Gravitational -SI: absolute
Units
Pascal's Principle
Engineers and scientists need a common language
Direction of Forces
46. Can be applied:-By direct contact: push - pull - twist -At a distance: gravity - magnetism Can change: speed - direction - shape - units of force
Forces
Pressure
Newton's Third Law
Steam Engine
47. 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)
Weight
Equation for Mechanical Advantage regarding inclined planes
Translation
Power
48. 1. Magnitude: size - a numberi.e. 50 mph 2. Direction: angle i.e. N -E -W -S
Conversions
Forces and Vectors
Units
US Customary
49. 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
System
Work
Mechanical Engineering
Aerodynamics
50. What we are studying
System
Units for Pressure
decrease
Fourth Stroke (Diesel Engine)