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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 quantity that has both magnitude and direction when placed within a coordinate system -Forces and Velocity i.e. driving 50 miles to the northeast
Component
If the force is applied at the center of the rotation
Drum Brakes
Vectors
2. Length x Width
Mechanics
Area Equation
Gravity
Moment Arm Equation
3. Causes acceleration -Units: USA: 32.2 ft/s^2 SI: 9.8 m/sec^2
Gravity
Result of Applying a force to a rigid body at rest
Dynamics
Dimension
4. When fluid is at rest
Hydrostatics
Equation for Mechanical Advantage regarding inclined planes
Moment Arm
Compression
5. The magnitude of something in a particular direction
Second Stroke (4 Stroke Engine)
Length
Second Stroke (rotary)
Fluid Power
6. 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
Disc Breaks
Applied Brakes
Mechanical Advantage Equation
Pythagorean Theorem
7. When the fluid is in motion
Disc Breaks
Fourth Stroke (4 Stroke Engine)
Power Equation
Hydrodynamics
8. A^2+b^2=c^2
Pythagorean Theorem Equation
Direction of Forces
Pressure
System
9. Can be reduced by decreasing the weight or force or increasing the area i.e. airbag
Mass
US Customary
Pressure
Hydrostatics
10. 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 (
Compression
System International (SI)
Dynamics
Units for Pressure
11. Both engines drive wheels -ICE used for cruising -Electric motor assists with low speed for acceleration and hill climbing
Law of Conservation of Mass
First Stroke (Diesel Engine)
Hybrid Parallel
Fluids
12. Energy may enter or leave. Mass can enter or leave the system i.e. open water bottle - molecule - hydraulic cylinder - human
Newton's First Law of Motion
Open System
Length
Internal Combustion Engine Types
13. Work/force or vertical distance/sloping distance
Equation for Mechanical Advantage regarding inclined planes
Closed System
Equilibrium
Newton's Third Law
14. (pi) x (radius)^2
Area of a circle equation
First Stroke (rotary)
System International (SI)
Hybrid
15. 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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16. Mechanics is an application of math that describes how forces affect a body
Velocity
Rotation
Mechanics
Dynamics
17. Combustion ignited by spark plug and materials are compressed
Fourth Stroke (Diesel Engine)
Fluid Power
Third Stroke (4 Stroke Engine)
Drum Brakes
18. A small piece that makes up a larger whole. Each component is there for a specific job - but the sum of components
Mechanics describe how forces affect a body
more than one force
Component
Second Stroke (Diesel Engine)
19. Combine two or more power sources - locomotives - buses (diesel- electric) -Submarines (Nuclear- electric) -Components:gas engine - fuel tank - electric motor - generator - batteries - transmission -2 motors: Internal Combustion Engine and Electric E
Force Equation
Moment Arm
Fourth Stroke (Diesel Engine)
Hybrid
20. Ignition - power stroke
Mass
Newton's First Law of Motion
Power Equation
Third Stroke (rotary)
21. Three- dimensional property measured in units of length times length times length =length x width x height
Second Stroke (2 Stroke Engine)
Power Equation
Volume
Dimension
22. Are independent of other dimensions - They are limited in number - length - mass - time - temperature - force
Area Equation
Derived Dimension
Force lets us do work on a system
Base Dimensions
23. Force without machine/Force with machine
Equilibrium
Force Equation
Hydrodynamics
Mechanical Advantage Equation
24. A^2+b^2=c^2 - used to calculate vectors
Newton's Second Law
Fourth Stroke (4 Stroke Engine)
Pythagorean Theorem
Result of Applying a force to a rigid body at rest
25. When the moving fluid is a gas
Steam Engine
Aerodynamics
Hybrid Series
Hybrid Parallel
26. Fuel is injected and combusts due to temperature of compressed air
Aerodynamics
Fluid Power
Rotation
Third Stroke (Diesel Engine)
27. The force simple machines use to do work on a single load or against a single force
Effort
Equilibrium
Law of Conservation of Mass
Compression
28. 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
Fluid Power
System
Mechanics
Common Brake Characteristics
29. In a hydraulic with an incompressible fluid - the total pressure at any point in the system is the same - liquid
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30. Varies by location (on earth) - distance (from earth) - and mass (of planet)
2 Stroke Engine
Gravity
Hybrid Parallel
Base Dimensions
31. Describes how applied forces bring a body into rest or equilibrium
Statics
System
Newton's First Law of Motion
Torque
32. In a right triangle - the sum of the squares of the sides equals the square of the hypotenous
Pythagorean Theorem
Hydrostatics
Force lets us do work on a system
Compression
33. 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
Mechanical Advantage
Second Stroke (rotary)
Effort
Steam Engine
34. Intake of fuel and air mix
Closed System
Second Stroke (rotary)
Equilibrium
First Stroke (rotary)
35. 1. Magnitude: size - a numberi.e. 50 mph 2. Direction: angle i.e. N -E -W -S
Work
Translation
Forces and Vectors
will move
36. Incompressible (volume doesnt change) Transmit force evenly - Lubricates - Trap contaminants - Some based on vegetable oils - Biodegradable - Aircraft fluids noncombustible (thins as temperature rises)
Pythagorean Theorem
Fluids
Hydrostatics
Hybrid Series
37. Dimensions and units
Engineers and scientists need a common language
Power
2 Stroke Engine
Internal Combustion Engine Types
38. The branch of science and engineering involving measurement
Drum Brakes
Metrology
Diesel Engine
Second Stroke (4 Stroke Engine)
39. Translation (slide) -Rotate -Slide and Rotate Together
Moment Arm
If the force is applied away from the center of rotation
Second Stroke (2 Stroke Engine)
Result of Applying a force to a rigid body at rest
40. A flat - two dimensional property -Units of length multiplied by length describe area -A=length x width
Second Stroke (rotary)
Area
no movement
Effort
41. Air is drawn in
First Stroke (4 Stroke Engine)
First Stroke (Diesel Engine)
Forces
Units for Pressure
42. Liquid or gas
Fluid
Second Stroke (4 Stroke Engine)
Fourth Stroke (rotary)
Statics
43. When the work done by the effort just equals the work done by the load - ______ of the machine will occur
First Stroke (2 Stroke Engine)
no movement
Pressure
Mechanics
44. Old technology- harder to service-Still used on big trucks and trailers because they are too expensive to convert
Compression
Newton's Third Law
Volume
Drum Brakes
45. Body at rest or is in equilibrium (wall)
decrease
Moment Arm Equation
First Stroke (Diesel Engine)
Static
46. Can be applied at a time on an object
First Stroke (4 Stroke Engine)
More than one force
Aerodynamics
Couple
47. Applied at an angle or parallel to a surface
Shear
Newton's First Law of Motion
If the force is applied away from the center of rotation
Units for Pressure
48. When two parallel forces equal in magnitude and opposite direction - i.e. steering wheel - turn a know - turn on and off a faucet
System International (SI)
Hydraulics
Couple
Vectors
49. 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
Equilibrium
Rotary
Result of Applying a force to a rigid body at rest
Fluid
50. If a force causes rotations -Vector- Machines can have more than one torque-Units: foot- pound and newton - meter - i.e. engines - airplanes - propeller
Power
no movement
Aerodynamics
Torque