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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. 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
Area Equation
Fourth Stroke (Diesel Engine)
Closed System
Rotary
2. When the work done by the effort just equals the work done by the load - ______ of the machine will occur
Dynamics
no movement
Derived Dimension
Equilibrium
3. Compression-Tension-Shear
Gravity
Derived Dimension
Volume
Direction of Forces
4. Old technology- harder to service-Still used on big trucks and trailers because they are too expensive to convert
Drum Brakes
Volume
4 Stroke Engine
Newton's Second Law
5. (pi) x (radius)^2
Mechanical Advantage Equation
Drum Brakes
Area of a circle equation
Shear
6. Same pressure - work - volume - Different forces and distances
Hydraulic Cylinders
Gravity
Pressure
Conversions
7. ...
US Customary
Force lets us do work on a system
Rotary
Surroundings
8. Varies by location (on earth) - distance (from earth) - and mass (of planet)
Component
Gravity
Pythagorean Theorem Equation
Rotary
9. A pull on an object
Mechanics describe how forces affect a body
Power
Second Stroke (4 Stroke Engine)
Tension
10. A^2+b^2=c^2 - used to calculate vectors
Volume
Derived Dimension
Pythagorean Theorem
Power
11. 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)
Disc Breaks
Power
System
If the force is applied away from the center of rotation
12. When the moving fluid is a gas
Rotary
Forces
Aerodynamics
Dynamics
13. Air is compressed - work is done on the system
Second Stroke (Diesel Engine)
Common Brake Characteristics
Vectors
4 Stroke Engine
14. When the sum of all forces and the sum of all moments both equal forces - No movement
Volume
Equilibrium
Base Dimensions
Hydraulic Cylinders
15. 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
If the force is applied away from the center of rotation
Common Brake Characteristics
Static
Couple
16. Can be applied:-By direct contact: push - pull - twist -At a distance: gravity - magnetism Can change: speed - direction - shape - units of force
Forces
Third Stroke (rotary)
Gravity
Moment Arm Equation
17. 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
Hydrodynamics
Third Stroke (rotary)
Hydraulics
Shear
18. When the fluid is in motion
Tension
Direction of Forces
decrease
Hydrodynamics
19. Work/force or vertical distance/sloping distance
Equation for Mechanical Advantage regarding inclined planes
Hybrid
Steam Engine
Applied Brakes
20. Exhaust of combustion products
Temperature
Hybrid Series
Fourth Stroke (rotary)
Machine
21. 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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22. In a right triangle - the sum of the squares of the sides equals the square of the hypotenous
Internal Combustion Engine Types
Second Stroke (2 Stroke Engine)
Pythagorean Theorem
no movement
23. 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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24. A quantity that has both magnitude and direction when placed within a coordinate system -Forces and Velocity i.e. driving 50 miles to the northeast
Shear
Temperature
Vectors
Second Stroke (Diesel Engine)
25. Movement along a line (reciprocal or linear motion) -Units: feet and meters
Units for Pressure
Conversions
Translation
Weight
26. Four Stroke Engine -Used in hotter areas because more efficient -Higher compression ratio than gasoline
Diesel Engine
Force lets us do work on a system
Mechanics
Mechanics describe how forces affect a body
27. Force/Area
more than one force
Pressure Equation
will move
Couple
28. Used to measure or quantify -US Common: Absolute and Gravitational -SI: absolute
Units
Fluid
Volume
Newton's Third Law
29. The perpendicular distance from the pivot point to the point of application of the force (d) - M=Fd -Clockwise=Negative moment -Counterclockwise=Positive moment
Fluid
Pythagorean Theorem
Moment Arm
Power Equation
30. When two parallel forces equal in magnitude and opposite direction - i.e. steering wheel - turn a know - turn on and off a faucet
Newton's Third Law
Surroundings
Engineers and scientists need a common language
Couple
31. When the work done by the effort exceeds the work done by the load - the load...
Power Equation
Gravity
will move
Forces and Vectors
32. In a hydraulic with an incompressible fluid - the total pressure at any point in the system is the same - liquid
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33. 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
Pressure Equation
Inclined Plane
Torque
Units
34. Compression of fuel mix
Power
decrease
First Stroke (Diesel Engine)
Second Stroke (rotary)
35. Combustion ignited by spark plug and materials are compressed
Newton's Second Law
First Stroke (rotary)
Hydrostatics
Third Stroke (4 Stroke Engine)
36. The branch of science and engineering involving measurement
System International (SI)
Equation for Mechanical Advantage regarding inclined planes
Metrology
Shear
37. The force simple machines use to do work on a single load or against a single force
Component
Static
Statics
Effort
38. 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
System
Pythagorean Theorem
Temperature
39. Modern Technology- More efficient-Better Cooling-Easier to service- longer life - lither weight- More expensive
Fourth Stroke (rotary)
Volume
System
Disc Breaks
40. Intake of fuel and air mix
Surroundings
First Stroke (rotary)
Second Stroke (Diesel Engine)
Rotary
41. 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
Fluid Power
Length
Mechanical Engineering
Acceleration
42. Force x Distance
Force Equation
Hybrid Parallel
Internal Combustion Engine Types
Moment Arm Equation
43. Length / Time
Velocity
Tension
Length
Law of Conservation of Mass
44. The magnitude of something in a particular direction
Mechanical Advantage
Work
Length
Forces and Vectors
45. A change in velocity over time -Unites: USA- ft/s^2 and SI: m/s^2
will move
Metrology
Acceleration
System
46. 1. Magnitude: size - a numberi.e. 50 mph 2. Direction: angle i.e. N -E -W -S
Newton's Second Law
Newton's Third Law
Pythagorean Theorem
Forces and Vectors
47. Both engines drive wheels -ICE used for cruising -Electric motor assists with low speed for acceleration and hill climbing
Mass
Hybrid Parallel
Dynamics
Fluid Power
48. Often a free body has _______ acting on it
Drum Brakes
Diesel Engine
more than one force
Disc Breaks
49. Can be reduced by decreasing the weight or force or increasing the area i.e. airbag
Power Equation
Area of a circle equation
Pressure
Velocity
50. Are independent of other dimensions - They are limited in number - length - mass - time - temperature - force
Base Dimensions
Equation for Mechanical Advantage regarding inclined planes
Third Stroke (Diesel Engine)
More than one force