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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. Are independent of other dimensions - They are limited in number - length - mass - time - temperature - force
Fourth Stroke (4 Stroke Engine)
Base Dimensions
Surroundings
Result of Applying a force to a rigid body at rest
2. Modern Technology- More efficient-Better Cooling-Easier to service- longer life - lither weight- More expensive
Compression
Closed System
Disc Breaks
Metrology
3. Mechanics is an application of math that describes how forces affect a body
Weight
Dynamics
Pressure Equation
Mechanics
4. 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
Hybrid
Area Equation
Second Stroke (4 Stroke Engine)
Second Stroke (rotary)
5. When the work done by the effort just equals the work done by the load - ______ of the machine will occur
System International (SI)
Inclined Plane
no movement
Tension
6. Air is compressed - work is done on the system
Fourth Stroke (4 Stroke Engine)
Second Stroke (Diesel Engine)
Internal Combustion Engine Types
Result of Applying a force to a rigid body at rest
7. Fuel is injected and combusts due to temperature of compressed air
Newton's First Law of Motion
Area of a circle equation
Third Stroke (Diesel Engine)
Applied Brakes
8. The branch of science and engineering involving measurement
Hybrid Series
Moment Arm
Aerodynamics
Metrology
9. Force without machine/Force with machine
Pythagorean Theorem
Mechanical Advantage Equation
Area
Acceleration
10. Two stroke- Four Stroke- Diesel-Rotary -Hybrid
Volume
Base Dimensions
Internal Combustion Engine Types
Third Stroke (4 Stroke Engine)
11. The perpendicular distance from the pivot point to the point of application of the force (d) - M=Fd -Clockwise=Negative moment -Counterclockwise=Positive moment
Fourth Stroke (4 Stroke Engine)
Moment Arm
Second Stroke (rotary)
Mechanical Advantage
12. A change in velocity over time -Unites: USA- ft/s^2 and SI: m/s^2
Units
Power Equation
Moment Arm Equation
Acceleration
13. One that pushes on an object
Power
Work
Third Stroke (rotary)
Compression
14. A system adopted from an old British system of units in the 13th century -Engineering system -Units: length- foot (ft) - time- second (s) - force-(lbs) - Mass is a derived unit called a slug -Political/Economic choice -Awkward
Disc Breaks
Mechanical Engineering
US Customary
Volume
15. Force x Distance
Engineers and scientists need a common language
Third Stroke (4 Stroke Engine)
Moment Arm Equation
Aerodynamics
16. Exhaust
Volume
Hydraulics
Fourth Stroke (Diesel Engine)
Component
17. Length x Width
Shear
Equation for Mechanical Advantage regarding inclined planes
Law of Conservation of Mass
Area Equation
18. When the moving fluid is a gas
System International (SI)
Aerodynamics
Length
Force lets us do work on a system
19. 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)
Hydrodynamics
If the force is applied away from the center of rotation
Pascal's Principle
Power
20. When a simple machine increases a force it is at the expense of a ____ in the distance the load is moved
2 Stroke Engine
Torque
Mass
decrease
21. A pull on an object
Component
Power
Tension
If the force is applied away from the center of rotation
22. Mass can neither by created nor destroyed - only transformed
Law of Conservation of Mass
Third Stroke (rotary)
If the force is applied away from the center of rotation
Statics
23. Psi - newtons - pascals
Hydrostatics
Units for Pressure
System International (SI)
Newton's First Law of Motion
24. Can be applied at a time on an object
Dynamics
More than one force
2 Stroke Engine
Equation for Mechanical Advantage regarding inclined planes
25. An indication of kinetic energy of mass at the molecular level
Component
Fluids
Mass
Temperature
26. (Force)(Distance)/Seconds
Second Stroke (Diesel Engine)
Units for Pressure
Second Stroke (rotary)
Power Equation
27. Ignition - power stroke
Third Stroke (rotary)
Mechanical Engineering
If the force is applied away from the center of rotation
Third Stroke (4 Stroke Engine)
28. 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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29. Rotation will not occur - but translation might occur
Mechanical Advantage Equation
Shear
If the force is applied at the center of the rotation
Mechanical Engineering
30. Piston travels down and intake valve is opened. Intake of fuel and air into chamber
Internal Combustion Engine Types
First Stroke (4 Stroke Engine)
If the force is applied away from the center of rotation
Static
31. 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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32. Can be applied:-By direct contact: push - pull - twist -At a distance: gravity - magnetism Can change: speed - direction - shape - units of force
Gravity
Forces
Pressure
Fourth Stroke (rotary)
33. Incompressible (volume doesnt change) Transmit force evenly - Lubricates - Trap contaminants - Some based on vegetable oils - Biodegradable - Aircraft fluids noncombustible (thins as temperature rises)
Common Brake Characteristics
Pythagorean Theorem Equation
Fluids
Tension
34. Describes a physical property of anything - What we are measuring
Pythagorean Theorem Equation
Vectors
Open System
Dimension
35. A^2+b^2=c^2
Conversions
Translation
Rotary
Pythagorean Theorem Equation
36. Piston travels up and both plugs are closed
Volume
Second Stroke (4 Stroke Engine)
Diesel Engine
Second Stroke (Diesel Engine)
37. Intake of fuel and air mixture - compression of mixture by piston
Inclined Plane
Second Stroke (2 Stroke Engine)
Common Brake Characteristics
First Stroke (2 Stroke Engine)
38. 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
Area Equation
Aerodynamics
4 Stroke Engine
Newton's First Law of Motion
39. A fluid power system uses hydraulics and a fluid under pressure to create a greater force than is applied
Fluid Power
Couple
Dynamics
Power Equation
40. Derived from - or composed of - base dimensions i.e. Area (length x width) - Weight (mass x acceleration) - velocity (length/time)
Couple
Mechanics
Derived Dimension
Hydraulic Cylinders
41. When two parallel forces equal in magnitude and opposite direction - i.e. steering wheel - turn a know - turn on and off a faucet
Law of Conservation of Mass
Hybrid Series
Couple
Compression
42. 1. Magnitude: size - a numberi.e. 50 mph 2. Direction: angle i.e. N -E -W -S
First Stroke (4 Stroke Engine)
Forces and Vectors
Gravity
Third Stroke (rotary)
43. (pi) x (radius)^2
Disc Breaks
Rotation
Dimension
Area of a circle equation
44. 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
Dimension
Hydrostatics
If the force is applied at the center of the rotation
Rotary
45. Old technology- harder to service-Still used on big trucks and trailers because they are too expensive to convert
Power Equation
Hydrostatics
Hydrodynamics
Drum Brakes
46. Energy may enter or leave. Mass can enter or leave the system i.e. open water bottle - molecule - hydraulic cylinder - human
Fourth Stroke (Diesel Engine)
If the force is applied away from the center of rotation
Component
Open System
47. Air is drawn in
Pythagorean Theorem
Power Equation
First Stroke (Diesel Engine)
Open System
48. Weight/Time
Power Equation
Forces
Open System
Applied Brakes
49. Allows comparison between different measuring systems and units - Necessary to market internationally
Tension
Moment Arm Equation
Second Stroke (Diesel Engine)
Conversions
50. The designing of machines that contribute to society and our quality of life - Mechanical engineers apply the principles of mathematics - chemistry - and physics to solve real- world problems
Mechanical Engineering
Third Stroke (4 Stroke Engine)
Fluids
Mechanics describe how forces affect a body