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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. In a right triangle - the sum of the squares of the sides equals the square of the hypotenous
Pythagorean Theorem
Mechanics describe how forces affect a body
Third Stroke (Diesel Engine)
Couple
2. 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
Hydraulics
Vectors
Third Stroke (Diesel Engine)
Gravity
3. Force/Area
Aerodynamics
Third Stroke (4 Stroke Engine)
Work
Pressure Equation
4. When the work done by the effort just equals the work done by the load - ______ of the machine will occur
no movement
Second Stroke (rotary)
Mechanical Advantage Equation
Rotary
5. A combination of components
Gravity
System
Engineers and scientists need a common language
Third Stroke (rotary)
6. One that pushes on an object
Base Dimensions
Torque
more than one force
Compression
7. A pull on an object
Tension
no movement
Dynamics
Fluid
8. Result of gravity acting on mass -The greater the mass - the greater the weight -Is a force -Units: lbs - N
Weight
Hybrid Parallel
More than one force
Translation
9. Piston travels up and both plugs are closed
Velocity
Second Stroke (4 Stroke Engine)
Mass
Third Stroke (rotary)
10. Air is compressed - work is done on the system
Hydraulic Cylinders
Dynamics
Forces
Second Stroke (Diesel Engine)
11. Force without machine/Force with machine
Second Stroke (Diesel Engine)
Equation for Mechanical Advantage regarding inclined planes
Gravity
Mechanical Advantage Equation
12. If a force causes rotations -Vector- Machines can have more than one torque-Units: foot- pound and newton - meter - i.e. engines - airplanes - propeller
System
Torque
Pythagorean Theorem
Mechanics
13. Body at rest or is in equilibrium (wall)
Second Stroke (2 Stroke Engine)
Area
Fourth Stroke (rotary)
Static
14. The force simple machines use to do work on a single load or against a single force
Effort
Power
Engineers and scientists need a common language
Area Equation
15. Intake of fuel and air mixture - compression of mixture by piston
Second Stroke (2 Stroke Engine)
Mechanical Advantage Equation
First Stroke (2 Stroke Engine)
Volume
16. 1. Magnitude: size - a numberi.e. 50 mph 2. Direction: angle i.e. N -E -W -S
Hybrid Series
Temperature
Forces and Vectors
Third Stroke (4 Stroke Engine)
17. Describes how applied forces bring a body into rest or equilibrium
Fluid Power
Statics
Forces and Vectors
Fourth Stroke (rotary)
18. Intake of fuel and air mix
Steam Engine
US Customary
First Stroke (rotary)
Mechanics
19. Both engines drive wheels -ICE used for cruising -Electric motor assists with low speed for acceleration and hill climbing
Second Stroke (rotary)
System
Vectors
Hybrid Parallel
20. 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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21. Translation (slide) -Rotate -Slide and Rotate Together
2 Stroke Engine
Result of Applying a force to a rigid body at rest
Pressure
Conversions
22. An indication of kinetic energy of mass at the molecular level
Static
Fluid Power
First Stroke (2 Stroke Engine)
Temperature
23. Incompressible (volume doesnt change) Transmit force evenly - Lubricates - Trap contaminants - Some based on vegetable oils - Biodegradable - Aircraft fluids noncombustible (thins as temperature rises)
Direction of Forces
Fluids
Power Equation
Base Dimensions
24. Dimensions and units
Second Stroke (Diesel Engine)
Temperature
Engineers and scientists need a common language
If the force is applied away from the center of rotation
25. Mass x acceleration
First Stroke (2 Stroke Engine)
Force Equation
Couple
Machine
26. 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
Hybrid Series
Mechanical Advantage Equation
Mechanical Engineering
Gravity
27. 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
Third Stroke (4 Stroke Engine)
Second Stroke (2 Stroke Engine)
US Customary
Torque
28. Piston travels down and intake valve is opened. Intake of fuel and air into chamber
First Stroke (4 Stroke Engine)
Area
Vectors
Area of a circle equation
29. Body in motion (car)
Pythagorean Theorem
Torque
Forces and Vectors
Dynamics
30. Work/force or vertical distance/sloping distance
Applied Brakes
Units
Equation for Mechanical Advantage regarding inclined planes
First Stroke (4 Stroke Engine)
31. Applied at an angle or parallel to a surface
Temperature
Direction of Forces
Shear
Second Stroke (rotary)
32. Ignition - power stroke
US Customary
Hydrodynamics
Third Stroke (rotary)
Power Equation
33. Two stroke- Four Stroke- Diesel-Rotary -Hybrid
Base Dimensions
Fourth Stroke (rotary)
Second Stroke (2 Stroke Engine)
Internal Combustion Engine Types
34. The magnitude of something in a particular direction
Hybrid Parallel
Temperature
Pressure
Length
35. When the moving fluid is a gas
Conversions
Compression
Hydrodynamics
Aerodynamics
36. The perpendicular distance from the pivot point to the point of application of the force (d) - M=Fd -Clockwise=Negative moment -Counterclockwise=Positive moment
System
Rotation
Length
Moment Arm
37. Fuel is injected and combusts due to temperature of compressed air
Third Stroke (Diesel Engine)
Gravity
Vectors
Newton's Second Law
38. Rotation will not occur - but translation might occur
Mechanical Advantage Equation
If the force is applied at the center of the rotation
Volume
Pressure Equation
39. Compression-Tension-Shear
Direction of Forces
4 Stroke Engine
Second Stroke (4 Stroke Engine)
Mechanical Advantage Equation
40. ...
Force lets us do work on a system
Closed System
Area Equation
More than one force
41. (pi) x (radius)^2
Pressure Equation
Vectors
Area of a circle equation
Second Stroke (Diesel Engine)
42. Compression of fuel mix
Second Stroke (rotary)
Closed System
Volume
If the force is applied at the center of the rotation
43. Mechanics is an application of math that describes how forces affect a body
Aerodynamics
First Stroke (rotary)
Direction of Forces
Mechanics
44. 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
More than one force
Work
Machine
Hydraulics
45. Combustion of fuel mixture ignited by spark plug
Force lets us do work on a system
Hydraulics
Second Stroke (2 Stroke Engine)
Statics
46. In a hydraulic with an incompressible fluid - the total pressure at any point in the system is the same - liquid
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47. Causes acceleration -Units: USA: 32.2 ft/s^2 SI: 9.8 m/sec^2
Surroundings
Common Brake Characteristics
Newton's First Law of Motion
Gravity
48. When the sum of all forces and the sum of all moments both equal forces - No movement
Drum Brakes
Hydrostatics
First Stroke (Diesel Engine)
Equilibrium
49. Energy may enter or leave. No mass enters or leaves the system i.e. Closed water bottle - car engine - human
Open System
Closed System
Derived Dimension
Force Equation
50. Are independent of other dimensions - They are limited in number - length - mass - time - temperature - force
Third Stroke (rotary)
Tension
Base Dimensions
Dimension