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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. 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
Power Equation
Work
Dimension
Component
2. Same pressure - work - volume - Different forces and distances
Units for Pressure
Length
Direction of Forces
Hydraulic Cylinders
3. (Force)(Distance)/Seconds
Hydraulic Cylinders
Power Equation
Machine
Hydraulics
4. A change in velocity over time -Unites: USA- ft/s^2 and SI: m/s^2
Fluid Power
Moment Arm
Acceleration
First Stroke (Diesel Engine)
5. Mechanics is an application of math that describes how forces affect a body
Law of Conservation of Mass
Mechanics
Compression
Fluid
6. A flat - two dimensional property -Units of length multiplied by length describe area -A=length x width
Area of a circle equation
Area
Hydrodynamics
Hybrid
7. Result of gravity acting on mass -The greater the mass - the greater the weight -Is a force -Units: lbs - N
Weight
Newton's Second Law
Rotation
System International (SI)
8. Weight/Time
no movement
Power Equation
Second Stroke (4 Stroke Engine)
Shear
9. Liquid or gas
Fluid
Compression
Common Brake Characteristics
Mechanical Advantage Equation
10. If a force causes rotations -Vector- Machines can have more than one torque-Units: foot- pound and newton - meter - i.e. engines - airplanes - propeller
Hydraulic Cylinders
Static
First Stroke (rotary)
Torque
11. Rotation will not occur - but translation might occur
If the force is applied at the center of the rotation
Couple
Second Stroke (2 Stroke Engine)
Engineers and scientists need a common language
12. 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
Inclined Plane
Compression
Internal Combustion Engine Types
First Stroke (2 Stroke Engine)
13. Piston travels up and exhaust valve opens. Combustion by product exhaustion
Moment Arm
Fourth Stroke (4 Stroke Engine)
Gravity
Common Brake Characteristics
14. A^2+b^2=c^2 - used to calculate vectors
Pythagorean Theorem
Dynamics
Result of Applying a force to a rigid body at rest
First Stroke (2 Stroke Engine)
15. Can be reduced by decreasing the weight or force or increasing the area i.e. airbag
Common Brake Characteristics
Pressure
Pythagorean Theorem Equation
Dimension
16. A small piece that makes up a larger whole. Each component is there for a specific job - but the sum of components
Couple
Mechanics describe how forces affect a body
Work
Component
17. Pistons connected to crankshaft -1 stroke up - 1 stroke down of the piston -1 rotation of the piston -Problems: high emissions - noisy - inefficient - high vibrations - unburnt fuel - burnt oil -Benefits: small and light -Being phased out in USA - i.
will move
If the force is applied away from the center of rotation
2 Stroke Engine
Translation
18. 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
Third Stroke (4 Stroke Engine)
Equilibrium
Pythagorean Theorem
19. Energy may enter or leave. Mass can enter or leave the system i.e. open water bottle - molecule - hydraulic cylinder - human
Open System
Velocity
Power Equation
Acceleration
20. Describes how applied forces bring a body into motion
Vectors
Pythagorean Theorem Equation
First Stroke (Diesel Engine)
Dynamics
21. The branch of science and engineering involving measurement
Forces
Second Stroke (4 Stroke Engine)
Tension
Metrology
22. Allows comparison between different measuring systems and units - Necessary to market internationally
Fourth Stroke (Diesel Engine)
System International (SI)
Conversions
US Customary
23. Length x Width x Height
Volume
Hybrid
Machine
Torque
24. 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
Internal Combustion Engine Types
If the force is applied at the center of the rotation
4 Stroke Engine
Applied Brakes
25. Fuel is injected and combusts due to temperature of compressed air
Mechanical Advantage
Pythagorean Theorem
Equilibrium
Third Stroke (Diesel Engine)
26. 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
more than one force
Hybrid
Area of a circle equation
Metrology
27. Body in motion (car)
Dimension
Hydraulics
Dynamics
Drum Brakes
28. 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
Dimension
Hydraulics
Disc Breaks
Compression
29. 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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30. When the fluid is in motion
Hydrodynamics
Third Stroke (Diesel Engine)
Pressure
Dynamics
31. Are independent of other dimensions - They are limited in number - length - mass - time - temperature - force
Equilibrium
Second Stroke (rotary)
Base Dimensions
Disc Breaks
32. Incompressible (volume doesnt change) Transmit force evenly - Lubricates - Trap contaminants - Some based on vegetable oils - Biodegradable - Aircraft fluids noncombustible (thins as temperature rises)
Hybrid Parallel
Fluids
Temperature
Engineers and scientists need a common language
33. ICE generates electricity for electric battery -Electric motor turns wheels
Direction of Forces
Gravity
Base Dimensions
Hybrid Series
34. Ignition - power stroke
Third Stroke (rotary)
will move
Vectors
no movement
35. Derived from - or composed of - base dimensions i.e. Area (length x width) - Weight (mass x acceleration) - velocity (length/time)
If the force is applied at the center of the rotation
Hydraulics
Derived Dimension
Power Equation
36. Old technology- harder to service-Still used on big trucks and trailers because they are too expensive to convert
Newton's First Law of Motion
Disc Breaks
Drum Brakes
Pythagorean Theorem
37. 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
Fourth Stroke (4 Stroke Engine)
Common Brake Characteristics
Hybrid Parallel
Rotation
38. Can be applied at a time on an object
Gravity
Steam Engine
More than one force
Forces
39. Varies by location (on earth) - distance (from earth) - and mass (of planet)
Power
System
Gravity
Forces and Vectors
40. Four Stroke Engine -Used in hotter areas because more efficient -Higher compression ratio than gasoline
Result of Applying a force to a rigid body at rest
Couple
Equilibrium
Diesel Engine
41. Compression of fuel mix
Second Stroke (rotary)
Law of Conservation of Mass
Fluid
Mechanics
42. What we are not studying
Mechanics describe how forces affect a body
Surroundings
Fourth Stroke (rotary)
Weight
43. Describes a physical property of anything - What we are measuring
Dimension
Statics
Newton's First Law of Motion
will move
44. Used to measure or quantify -US Common: Absolute and Gravitational -SI: absolute
Fourth Stroke (Diesel Engine)
Units
Hydraulic Cylinders
Hydrodynamics
45. Intake of fuel and air mixture - compression of mixture by piston
Surroundings
First Stroke (2 Stroke Engine)
Closed System
Open System
46. In a right triangle - the sum of the squares of the sides equals the square of the hypotenous
Acceleration
Third Stroke (4 Stroke Engine)
Pythagorean Theorem
Dimension
47. Rotation may occur
Couple
If the force is applied away from the center of rotation
Drum Brakes
Area
48. When the sum of all forces and the sum of all moments both equal forces - No movement
Newton's First Law of Motion
Gravity
Equilibrium
Volume
49. The magnitude of something in a particular direction
Translation
Power
Length
Hydraulic Cylinders
50. Combustion ignited by spark plug and materials are compressed
System
Mechanics
Third Stroke (4 Stroke Engine)
Drum Brakes