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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^2+b^2=c^2
Power
Pythagorean Theorem Equation
Statics
Area of a circle equation
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
Component
Surroundings
Hybrid
Hydraulics
3. When the work done by the effort exceeds the work done by the load - the load...
will move
Volume
Statics
Force lets us do work on a system
4. Describes how applied forces bring a body into motion
Hydraulics
Hybrid Parallel
Newton's Third Law
Dynamics
5. 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
Machine
Equation for Mechanical Advantage regarding inclined planes
First Stroke (4 Stroke Engine)
System International (SI)
6. Modern Technology- More efficient-Better Cooling-Easier to service- longer life - lither weight- More expensive
Pythagorean Theorem Equation
Equation for Mechanical Advantage regarding inclined planes
decrease
Disc Breaks
7. Air is drawn in
First Stroke (Diesel Engine)
Pascal's Principle
Vectors
Newton's First Law of Motion
8. Ignition - power stroke
Aerodynamics
2 Stroke Engine
Torque
Third Stroke (rotary)
9. When the fluid is in motion
Forces and Vectors
Hydrodynamics
Shear
Hydraulic Cylinders
10. One that pushes on an object
Dynamics
Compression
Direction of Forces
Fourth Stroke (Diesel Engine)
11. In a right triangle - the sum of the squares of the sides equals the square of the hypotenous
Acceleration
Pythagorean Theorem
Inclined Plane
Mechanical Engineering
12. 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)
Component
Pythagorean Theorem
More than one force
Power
13. Compression of fuel mix
Area Equation
Base Dimensions
Fourth Stroke (Diesel Engine)
Second Stroke (rotary)
14. External Combustion engine -Only used in factories and plants (not used in cars)
Units for Pressure
Acceleration
Steam Engine
Area Equation
15. Exhaust of combustion products
Hydrostatics
Fourth Stroke (rotary)
Pythagorean Theorem
Surroundings
16. Length / Time
Hybrid
Velocity
Common Brake Characteristics
System International (SI)
17. The branch of science and engineering involving measurement
Metrology
Forces and Vectors
Derived Dimension
Mechanics describe how forces affect a body
18. The force simple machines use to do work on a single load or against a single force
If the force is applied at the center of the rotation
Mechanical Advantage
Hybrid
Effort
19. 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
Translation
Aerodynamics
Inclined Plane
Work
20. Dimensions and units
Velocity
Mass
Diesel Engine
Engineers and scientists need a common language
21. 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
Vectors
Third Stroke (4 Stroke Engine)
Applied Brakes
Compression
22. Fuel is injected and combusts due to temperature of compressed air
Force lets us do work on a system
Third Stroke (Diesel Engine)
Pythagorean Theorem
Fourth Stroke (rotary)
23. A^2+b^2=c^2 - used to calculate vectors
no movement
Pythagorean Theorem
Power Equation
Hybrid Parallel
24. Energy may enter or leave. Mass can enter or leave the system i.e. open water bottle - molecule - hydraulic cylinder - human
Pascal's Principle
Torque
Third Stroke (4 Stroke Engine)
Open System
25. Liquid or gas
First Stroke (rotary)
Fluid
US Customary
Newton's Second Law
26. When the work done by the effort just equals the work done by the load - ______ of the machine will occur
More than one force
Component
System
no movement
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
Rotary
Static
Gravity
US Customary
28. A flat - two dimensional property -Units of length multiplied by length describe area -A=length x width
Fourth Stroke (4 Stroke Engine)
Drum Brakes
Dynamics
Area
29. What we are studying
System
Closed System
Rotation
Temperature
30. Applied at an angle or parallel to a surface
Fourth Stroke (4 Stroke Engine)
Shear
Dynamics
Gravity
31. Energy may enter or leave. No mass enters or leaves the system i.e. Closed water bottle - car engine - human
Hydraulics
Tension
Closed System
Open System
32. 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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33. In a hydraulic with an incompressible fluid - the total pressure at any point in the system is the same - liquid
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34. When the sum of all forces and the sum of all moments both equal forces - No movement
2 Stroke Engine
Equilibrium
Static
If the force is applied at the center of the rotation
35. 1. Magnitude: size - a numberi.e. 50 mph 2. Direction: angle i.e. N -E -W -S
Forces and Vectors
Common Brake Characteristics
Moment Arm
Closed System
36. A movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)
Fourth Stroke (Diesel Engine)
Rotation
Mechanics describe how forces affect a body
Hybrid
37. Mechanics is an application of math that describes how forces affect a body
Surroundings
Mechanics
Hybrid
no movement
38. 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
Diesel Engine
Power Equation
Mechanical Engineering
Pressure Equation
39. Translation (slide) -Rotate -Slide and Rotate Together
Volume
Result of Applying a force to a rigid body at rest
Hybrid Parallel
Pascal's Principle
40. Four Stroke Engine -Used in hotter areas because more efficient -Higher compression ratio than gasoline
Diesel Engine
decrease
Force lets us do work on a system
Units
41. Weight/Time
Length
Vectors
Aerodynamics
Power Equation
42. Describes a physical property of anything - What we are measuring
Dimension
Fluids
Dynamics
Pressure
43. Incompressible (volume doesnt change) Transmit force evenly - Lubricates - Trap contaminants - Some based on vegetable oils - Biodegradable - Aircraft fluids noncombustible (thins as temperature rises)
Third Stroke (rotary)
Fluids
Area
Gravity
44. When a simple machine increases a force it is at the expense of a ____ in the distance the load is moved
Pythagorean Theorem
Fourth Stroke (Diesel Engine)
decrease
Inclined Plane
45. Compression-Tension-Shear
Aerodynamics
Direction of Forces
Power
Volume
46. Mass can neither by created nor destroyed - only transformed
Moment Arm
Law of Conservation of Mass
Pressure
Fourth Stroke (Diesel Engine)
47. (pi) x (radius)^2
First Stroke (Diesel Engine)
Area of a circle equation
Units for Pressure
Conversions
48. Length x Width x Height
US Customary
Statics
Volume
more than one force
49. A combination of components
System
Forces and Vectors
Dynamics
Effort
50. 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
Steam Engine
Surroundings
4 Stroke Engine
Disc Breaks