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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. A movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)
Rotation
Hydrodynamics
Inclined Plane
Fluid Power
2. Compression of fuel mix
Newton's Third Law
Second Stroke (rotary)
First Stroke (4 Stroke Engine)
Units for Pressure
3. A pull on an object
If the force is applied at the center of the rotation
First Stroke (2 Stroke Engine)
Vectors
Tension
4. Old technology- harder to service-Still used on big trucks and trailers because they are too expensive to convert
Equilibrium
Length
Machine
Drum Brakes
5. Varies by location (on earth) - distance (from earth) - and mass (of planet)
Gravity
Newton's First Law of Motion
Area of a circle equation
Hydrodynamics
6. Applied at an angle or parallel to a surface
Shear
Forces
First Stroke (Diesel Engine)
Pythagorean Theorem
7. Derived from - or composed of - base dimensions i.e. Area (length x width) - Weight (mass x acceleration) - velocity (length/time)
Derived Dimension
Torque
no movement
Second Stroke (rotary)
8. 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
Rotary
System
Newton's Third Law
Units
9. Piston travels down and intake valve is opened. Intake of fuel and air into chamber
Newton's First Law of Motion
Internal Combustion Engine Types
Volume
First Stroke (4 Stroke Engine)
10. Air is drawn in
Second Stroke (rotary)
First Stroke (Diesel Engine)
System
Hybrid Series
11. External Combustion engine -Only used in factories and plants (not used in cars)
Effort
Steam Engine
Component
Mechanical Advantage
12. Force x Distance
Moment Arm Equation
Direction of Forces
Fluid
Hydraulics
13. Can be applied at a time on an object
More than one force
4 Stroke Engine
Dynamics
Result of Applying a force to a rigid body at rest
14. 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 (
System International (SI)
Moment Arm
Dynamics
Rotary
15. A flat - two dimensional property -Units of length multiplied by length describe area -A=length x width
Pressure Equation
Mechanical Advantage
Area
Surroundings
16. Incompressible (volume doesnt change) Transmit force evenly - Lubricates - Trap contaminants - Some based on vegetable oils - Biodegradable - Aircraft fluids noncombustible (thins as temperature rises)
Mechanics describe how forces affect a body
Fluids
Dynamics
Applied Brakes
17. 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
Surroundings
will move
Volume
Work
18. Often a free body has _______ acting on it
more than one force
no movement
Hydrostatics
Fluid
19. Four Stroke Engine -Used in hotter areas because more efficient -Higher compression ratio than gasoline
Fluid Power
Dynamics
Diesel Engine
System
20. 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 (rotary)
Conversions
Dimension
21. When a simple machine increases a force it is at the expense of a ____ in the distance the load is moved
Moment Arm Equation
decrease
Fluids
Hybrid
22. 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
Second Stroke (4 Stroke Engine)
Tension
Hydrodynamics
Inclined Plane
23. Two stroke- Four Stroke- Diesel-Rotary -Hybrid
Weight
Internal Combustion Engine Types
System
Force lets us do work on a system
24. 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
Inclined Plane
Units
will move
25. Modern Technology- More efficient-Better Cooling-Easier to service- longer life - lither weight- More expensive
Equation for Mechanical Advantage regarding inclined planes
Rotation
Disc Breaks
Dynamics
26. A^2+b^2=c^2
Torque
Pythagorean Theorem
Applied Brakes
Pythagorean Theorem Equation
27. A change in velocity over time -Unites: USA- ft/s^2 and SI: m/s^2
Metrology
Acceleration
Hybrid Parallel
Area Equation
28. Three- dimensional property measured in units of length times length times length =length x width x height
Volume
Hydrodynamics
Mechanical Advantage
Dynamics
29. Describes how applied forces bring a body into rest or equilibrium
Pascal's Principle
Forces
Second Stroke (4 Stroke Engine)
Statics
30. The branch of science and engineering involving measurement
Pressure
First Stroke (2 Stroke Engine)
Metrology
Hybrid
31. When the work done by the effort exceeds the work done by the load - the load...
decrease
will move
Third Stroke (rotary)
Second Stroke (Diesel Engine)
32. Intake of fuel and air mixture - compression of mixture by piston
Hybrid Series
Moment Arm Equation
First Stroke (2 Stroke Engine)
Couple
33. (pi) x (radius)^2
Hydrostatics
Area of a circle equation
System
Weight
34. 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
Moment Arm Equation
Equilibrium
Gravity
US Customary
35. 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
Hydrostatics
Hybrid
more than one force
Force lets us do work on a system
36. The magnitude of something in a particular direction
Length
Rotary
Dynamics
Mechanical Engineering
37. Causes acceleration -Units: USA: 32.2 ft/s^2 SI: 9.8 m/sec^2
Gravity
Statics
Newton's Second Law
System
38. Rotation will not occur - but translation might occur
If the force is applied at the center of the rotation
Second Stroke (rotary)
Closed System
Gravity
39. The perpendicular distance from the pivot point to the point of application of the force (d) - M=Fd -Clockwise=Negative moment -Counterclockwise=Positive moment
Fluids
Second Stroke (2 Stroke Engine)
Pressure
Moment Arm
40. Weight/Time
First Stroke (2 Stroke Engine)
will move
Force lets us do work on a system
Power Equation
41. 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
Statics
Mechanical Advantage
Hybrid Parallel
Second Stroke (4 Stroke Engine)
42. One that pushes on an object
If the force is applied away from the center of rotation
Compression
First Stroke (2 Stroke Engine)
no movement
43. Are independent of other dimensions - They are limited in number - length - mass - time - temperature - force
Hydrostatics
Base Dimensions
Rotary
decrease
44. 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
Acceleration
Moment Arm Equation
Machine
Pythagorean Theorem
45. ...
System International (SI)
Force lets us do work on a system
Disc Breaks
If the force is applied at the center of the rotation
46. Mass x acceleration
Work
Drum Brakes
Force Equation
Second Stroke (Diesel Engine)
47. An indication of kinetic energy of mass at the molecular level
Equation for Mechanical Advantage regarding inclined planes
First Stroke (4 Stroke Engine)
Temperature
Fourth Stroke (rotary)
48. Intake of fuel and air mix
Dynamics
Closed System
First Stroke (rotary)
Metrology
49. What we are not studying
Drum Brakes
System
Surroundings
Length
50. Length / Time
Volume
Aerodynamics
Third Stroke (Diesel Engine)
Velocity