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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. What we are not studying
Fourth Stroke (rotary)
Mechanics
Torque
Surroundings
2. Ignition - power stroke
Third Stroke (rotary)
Forces
Pressure
decrease
3. Can be applied at a time on an object
First Stroke (Diesel Engine)
US Customary
Pythagorean Theorem
More than one force
4. Varies by location (on earth) - distance (from earth) - and mass (of planet)
Gravity
Third Stroke (4 Stroke Engine)
Vectors
Units for Pressure
5. In a hydraulic with an incompressible fluid - the total pressure at any point in the system is the same - liquid
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6. When a simple machine increases a force it is at the expense of a ____ in the distance the load is moved
Vectors
decrease
Metrology
Area of a circle equation
7. The magnitude of something in a particular direction
Mechanical Engineering
Fourth Stroke (rotary)
Length
Mechanics
8. Describes a physical property of anything - What we are measuring
Third Stroke (rotary)
Hydrodynamics
Dimension
Dynamics
9. (pi) x (radius)^2
Area of a circle equation
Mass
2 Stroke Engine
Drum Brakes
10. Rotation may occur
First Stroke (Diesel Engine)
If the force is applied away from the center of rotation
Third Stroke (4 Stroke Engine)
Velocity
11. 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
Dynamics
Temperature
Mass
Third Stroke (rotary)
12. Mass x acceleration
More than one force
Force Equation
no movement
decrease
13. Compression of fuel mix
Fourth Stroke (rotary)
Second Stroke (rotary)
Component
Static
14. 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
Mechanics
Steam Engine
Mechanics describe how forces affect a body
15. Often a free body has _______ acting on it
Disc Breaks
more than one force
Volume
Fourth Stroke (Diesel Engine)
16. What we are studying
Second Stroke (2 Stroke Engine)
Force lets us do work on a system
First Stroke (rotary)
System
17. When the fluid is in motion
Hydrodynamics
Mechanical Advantage Equation
Hybrid Series
no movement
18. Liquid or gas
Vectors
Mechanical Advantage
Fluid
Translation
19. 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
Surroundings
Diesel Engine
Newton's Third Law
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. Exhaust
Torque
Open System
Newton's First Law of Motion
Fourth Stroke (Diesel Engine)
22. An indication of kinetic energy of mass at the molecular level
Fourth Stroke (Diesel Engine)
Torque
Temperature
Force Equation
23. 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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24. Mechanics is an application of math that describes how forces affect a body
Mechanics
Fourth Stroke (Diesel Engine)
Law of Conservation of Mass
Weight
25. When the work done by the effort exceeds the work done by the load - the load...
Area
Closed System
will move
Mechanics
26. Piston travels up and both plugs are closed
Units for Pressure
Pressure Equation
Second Stroke (4 Stroke Engine)
Pascal's Principle
27. Dimensions and units
Shear
Hydrodynamics
Engineers and scientists need a common language
Inclined Plane
28. Movement along a line (reciprocal or linear motion) -Units: feet and meters
Mechanical Advantage
Hybrid Parallel
Newton's Second Law
Translation
29. Body at rest or is in equilibrium (wall)
Second Stroke (4 Stroke Engine)
Hybrid
Static
Second Stroke (rotary)
30. Combustion of fuel mixture ignited by spark plug
Torque
Second Stroke (2 Stroke Engine)
Conversions
Mechanics
31. When the work done by the effort just equals the work done by the load - ______ of the machine will occur
no movement
Newton's Second Law
Common Brake Characteristics
Power
32. Mass can neither by created nor destroyed - only transformed
Second Stroke (Diesel Engine)
Base Dimensions
Component
Law of Conservation of Mass
33. A movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)
Hybrid Series
Result of Applying a force to a rigid body at rest
Rotation
Hybrid
34. Causes acceleration -Units: USA: 32.2 ft/s^2 SI: 9.8 m/sec^2
Mechanics describe how forces affect a body
Force Equation
Pythagorean Theorem Equation
Gravity
35. A combination of components
System
will move
Shear
no movement
36. Length x Width
Area Equation
System
Fluid
will move
37. Translation (slide) -Rotate -Slide and Rotate Together
Result of Applying a force to a rigid body at rest
Aerodynamics
Closed System
Diesel Engine
38. One that pushes on an object
Pressure Equation
Engineers and scientists need a common language
Compression
Hybrid Series
39. When fluid is at rest
Mass
Hydrostatics
Law of Conservation of Mass
First Stroke (4 Stroke Engine)
40. Derived from - or composed of - base dimensions i.e. Area (length x width) - Weight (mass x acceleration) - velocity (length/time)
Drum Brakes
Conversions
Derived Dimension
System
41. The force simple machines use to do work on a single load or against a single force
Internal Combustion Engine Types
Dynamics
Drum Brakes
Effort
42. Force/Area
Length
Component
Pressure Equation
Newton's Third Law
43. Compression-Tension-Shear
Area of a circle equation
Hybrid Parallel
2 Stroke Engine
Direction of Forces
44. 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
First Stroke (4 Stroke Engine)
Mechanical Advantage
Fluids
Diesel Engine
45. 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 International (SI)
Area of a circle equation
Work
Force Equation
46. Length / Time
Forces
Mechanical Advantage Equation
Power
Velocity
47. 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
Common Brake Characteristics
Pythagorean Theorem
more than one force
Power
48. Brake pedal and linkage - Master Cylinder - Wheel cylinders (4) - Hydraulic lines - Hydraulic fluid - Mechanical advantage is provided by the foot pedal to the booster (level) - A greater force is applied on the wheel cylinders than on the brake peda
Aerodynamics
Applied Brakes
Area of a circle equation
Law of Conservation of Mass
49. Force x Distance
Moment Arm Equation
Translation
Area
System
50. 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)
Torque
Power
Moment Arm Equation
Hydraulic Cylinders