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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. 1. Magnitude: size - a numberi.e. 50 mph 2. Direction: angle i.e. N -E -W -S
Machine
Forces and Vectors
Fourth Stroke (rotary)
Hydrostatics
2. Same pressure - work - volume - Different forces and distances
Surroundings
Metrology
Hydraulic Cylinders
Temperature
3. 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
Pascal's Principle
Moment Arm Equation
Area Equation
4. Are independent of other dimensions - They are limited in number - length - mass - time - temperature - force
Result of Applying a force to a rigid body at rest
Fourth Stroke (rotary)
Base Dimensions
Dimension
5. Three- dimensional property measured in units of length times length times length =length x width x height
Volume
Component
Fluids
Hybrid
6. 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
Conversions
Fourth Stroke (Diesel Engine)
Mechanical Advantage
Volume
7. Mass x acceleration
Mechanical Advantage Equation
Force Equation
US Customary
Power
8. The force simple machines use to do work on a single load or against a single force
Aerodynamics
Fourth Stroke (4 Stroke Engine)
Velocity
Effort
9. One that pushes on an object
Hybrid Series
Velocity
Open System
Compression
10. A pull on an object
Static
4 Stroke Engine
More than one force
Tension
11. Causes acceleration -Units: USA: 32.2 ft/s^2 SI: 9.8 m/sec^2
Pressure Equation
will move
Gravity
Base Dimensions
12. Combustion ignited by spark plug and materials are compressed
Volume
more than one force
Derived Dimension
Third Stroke (4 Stroke Engine)
13. A combination of components
Volume
Second Stroke (2 Stroke Engine)
System
Equation for Mechanical Advantage regarding inclined planes
14. When the work done by the effort exceeds the work done by the load - the load...
Pressure Equation
will move
Forces and Vectors
4 Stroke Engine
15. 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
Moment Arm
Aerodynamics
Mechanical Advantage
16. 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
Disc Breaks
Pressure Equation
Rotation
4 Stroke Engine
17. 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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18. Can be applied at a time on an object
Mechanics
Volume
Volume
More than one force
19. Dimensions and units
Area
First Stroke (4 Stroke Engine)
Second Stroke (Diesel Engine)
Engineers and scientists need a common language
20. 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
Shear
Inclined Plane
Applied Brakes
Translation
21. 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 (
Forces
Translation
Pascal's Principle
System International (SI)
22. Allows comparison between different measuring systems and units - Necessary to market internationally
Hydraulic Cylinders
Surroundings
Mass
Conversions
23. Often a free body has _______ acting on it
Second Stroke (Diesel Engine)
Fluids
more than one force
Vectors
24. Intake of fuel and air mixture - compression of mixture by piston
Area
Mechanical Advantage Equation
Engineers and scientists need a common language
First Stroke (2 Stroke Engine)
25. Fuel is injected and combusts due to temperature of compressed air
Hybrid Series
Inclined Plane
Shear
Third Stroke (Diesel Engine)
26. Both engines drive wheels -ICE used for cruising -Electric motor assists with low speed for acceleration and hill climbing
Newton's First Law of Motion
decrease
Hybrid Parallel
Hydrostatics
27. Length / Time
Work
Units for Pressure
Area Equation
Velocity
28. When fluid is at rest
Third Stroke (Diesel Engine)
Steam Engine
Mass
Hydrostatics
29. Applied at an angle or parallel to a surface
Torque
Shear
Law of Conservation of Mass
Second Stroke (rotary)
30. Translation (slide) -Rotate -Slide and Rotate Together
Derived Dimension
Force Equation
Result of Applying a force to a rigid body at rest
Direction of Forces
31. A fluid power system uses hydraulics and a fluid under pressure to create a greater force than is applied
Fluid Power
Dynamics
no movement
First Stroke (4 Stroke Engine)
32. Length x Width x Height
Fluid
Volume
Power
Third Stroke (Diesel Engine)
33. External Combustion engine -Only used in factories and plants (not used in cars)
Steam Engine
Inclined Plane
Derived Dimension
Compression
34. A movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)
Force Equation
Derived Dimension
Pressure Equation
Rotation
35. Energy may enter or leave. No mass enters or leaves the system i.e. Closed water bottle - car engine - human
Derived Dimension
Length
First Stroke (rotary)
Closed System
36. 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
Hydraulics
If the force is applied at the center of the rotation
Mechanical Engineering
Forces and Vectors
37. Used to measure or quantify -US Common: Absolute and Gravitational -SI: absolute
Effort
Applied Brakes
Rotary
Units
38. Piston travels up and exhaust valve opens. Combustion by product exhaustion
Fourth Stroke (4 Stroke Engine)
Mechanical Engineering
First Stroke (2 Stroke Engine)
Work
39. 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
Internal Combustion Engine Types
US Customary
decrease
Rotary
40. Intake of fuel and air mix
First Stroke (rotary)
Torque
Moment Arm
Power Equation
41. What we are studying
First Stroke (4 Stroke Engine)
Second Stroke (2 Stroke Engine)
System
Second Stroke (Diesel Engine)
42. Static - Dynamic
Result of Applying a force to a rigid body at rest
no movement
Mechanics describe how forces affect a body
Hydraulics
43. Psi - newtons - pascals
Units for Pressure
Tension
System International (SI)
Second Stroke (2 Stroke Engine)
44. ...
Force lets us do work on a system
Units
Mechanics describe how forces affect a body
Common Brake Characteristics
45. Mass can neither by created nor destroyed - only transformed
Hydrostatics
Dynamics
Law of Conservation of Mass
Volume
46. Air is drawn in
Pythagorean Theorem
First Stroke (Diesel Engine)
Temperature
Hydrodynamics
47. Piston travels up and both plugs are closed
First Stroke (2 Stroke Engine)
Second Stroke (Diesel Engine)
Second Stroke (4 Stroke Engine)
If the force is applied away from the center of rotation
48. When the sum of all forces and the sum of all moments both equal forces - No movement
Equilibrium
Third Stroke (4 Stroke Engine)
Vectors
Static
49. Mechanics is an application of math that describes how forces affect a body
Mechanics
Second Stroke (4 Stroke Engine)
Pythagorean Theorem Equation
Forces
50. Compression-Tension-Shear
First Stroke (rotary)
Gravity
Direction of Forces
Newton's Second Law