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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 movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)
Second Stroke (2 Stroke Engine)
Rotation
Law of Conservation of Mass
Drum Brakes
2. 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
Rotary
Pressure
First Stroke (2 Stroke Engine)
Equilibrium
3. When the fluid is in motion
Area Equation
Open System
Direction of Forces
Hydrodynamics
4. (Force)(Distance)/Seconds
Forces
Aerodynamics
Dynamics
Power Equation
5. The magnitude of something in a particular direction
Length
Static
Internal Combustion Engine Types
Disc Breaks
6. Three- dimensional property measured in units of length times length times length =length x width x height
Force lets us do work on a system
Volume
Equation for Mechanical Advantage regarding inclined planes
Steam Engine
7. Body at rest or is in equilibrium (wall)
Forces and Vectors
Hydraulics
Power Equation
Static
8. 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
Area of a circle equation
Rotary
Statics
US Customary
9. A^2+b^2=c^2
If the force is applied away from the center of rotation
more than one force
Pythagorean Theorem Equation
Units for Pressure
10. Translation (slide) -Rotate -Slide and Rotate Together
Result of Applying a force to a rigid body at rest
First Stroke (rotary)
Diesel Engine
Static
11. Combustion ignited by spark plug and materials are compressed
Third Stroke (4 Stroke Engine)
Mechanical Engineering
Pythagorean Theorem
Volume
12. (pi) x (radius)^2
If the force is applied at the center of the rotation
Area of a circle equation
Surroundings
Pythagorean Theorem
13. Mechanics is an application of math that describes how forces affect a body
Velocity
Machine
Derived Dimension
Mechanics
14. The perpendicular distance from the pivot point to the point of application of the force (d) - M=Fd -Clockwise=Negative moment -Counterclockwise=Positive moment
If the force is applied at the center of the rotation
Fluid Power
Moment Arm
Mechanics describe how forces affect a body
15. Combustion of fuel mixture ignited by spark plug
Surroundings
Second Stroke (2 Stroke Engine)
Force Equation
Third Stroke (Diesel Engine)
16. External Combustion engine -Only used in factories and plants (not used in cars)
Gravity
Third Stroke (rotary)
Shear
Steam Engine
17. In a hydraulic with an incompressible fluid - the total pressure at any point in the system is the same - liquid
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18. Dimensions and units
Component
Units for Pressure
Second Stroke (Diesel Engine)
Engineers and scientists need a common language
19. A small piece that makes up a larger whole. Each component is there for a specific job - but the sum of components
Mechanical Engineering
Component
Applied Brakes
Open System
20. When the work done by the effort exceeds the work done by the load - the load...
will move
Power Equation
Newton's Third Law
Metrology
21. Describes a physical property of anything - What we are measuring
will move
Dimension
Mechanical Advantage Equation
Result of Applying a force to a rigid body at rest
22. 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
Mechanics
Vectors
Torque
Power Equation
23. 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
Mechanics describe how forces affect a body
If the force is applied away from the center of rotation
Area Equation
Work
24. Force x Distance
Tension
Moment Arm Equation
Third Stroke (rotary)
Result of Applying a force to a rigid body at rest
25. Weight/Time
Disc Breaks
Hybrid Series
Power Equation
Torque
26. Mass can neither by created nor destroyed - only transformed
Pythagorean Theorem
Gravity
Translation
Law of Conservation of Mass
27. Can be applied:-By direct contact: push - pull - twist -At a distance: gravity - magnetism Can change: speed - direction - shape - units of force
Hybrid
Effort
Fluids
Forces
28. Mass x acceleration
Force Equation
Power Equation
Newton's Second Law
Hybrid Series
29. When the sum of all forces and the sum of all moments both equal forces - No movement
Hydraulics
Couple
Machine
Equilibrium
30. Liquid or gas
Fluid
Static
Mechanical Engineering
Newton's Second Law
31. Intake of fuel and air mixture - compression of mixture by piston
Pythagorean Theorem
First Stroke (2 Stroke Engine)
Common Brake Characteristics
Fluids
32. Incompressible (volume doesnt change) Transmit force evenly - Lubricates - Trap contaminants - Some based on vegetable oils - Biodegradable - Aircraft fluids noncombustible (thins as temperature rises)
Fluids
Steam Engine
Velocity
Derived Dimension
33. Can be reduced by decreasing the weight or force or increasing the area i.e. airbag
System
Mechanical Engineering
Pressure
First Stroke (2 Stroke Engine)
34. 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
Metrology
Power Equation
Third Stroke (4 Stroke Engine)
Machine
35. 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
Applied Brakes
Aerodynamics
Dynamics
Mass
36. Psi - newtons - pascals
Compression
Hydraulic Cylinders
Mechanics describe how forces affect a body
Units for Pressure
37. Air is compressed - work is done on the system
Metrology
Second Stroke (Diesel Engine)
Component
Dynamics
38. 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
Fourth Stroke (rotary)
will move
Statics
39. Describes how applied forces bring a body into rest or equilibrium
Area Equation
Statics
Length
Conversions
40. Piston travels down and intake valve is opened. Intake of fuel and air into chamber
Newton's Second Law
First Stroke (4 Stroke Engine)
Translation
Fluid
41. 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
Conversions
Fourth Stroke (rotary)
Third Stroke (4 Stroke Engine)
42. Exhaust of combustion products
Closed System
Fourth Stroke (rotary)
Metrology
Area of a circle equation
43. Piston travels up and exhaust valve opens. Combustion by product exhaustion
Pythagorean Theorem
Fourth Stroke (4 Stroke Engine)
no movement
Acceleration
44. 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 (
Work
System International (SI)
Conversions
Power Equation
45. 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
Fourth Stroke (rotary)
Compression
Aerodynamics
Inclined Plane
46. Body in motion (car)
Mechanical Advantage
Dynamics
Drum Brakes
Conversions
47. The force simple machines use to do work on a single load or against a single force
Second Stroke (4 Stroke Engine)
Effort
Area
4 Stroke Engine
48. A pull on an object
First Stroke (rotary)
Tension
Static
Hybrid Series
49. Applied at an angle or parallel to a surface
Shear
System
Weight
Forces
50. Pistons connected to crankshaft -1 stroke up - 1 stroke down of the piston -1 rotation of the piston -Problems: high emissions - noisy - inefficient - high vibrations - unburnt fuel - burnt oil -Benefits: small and light -Being phased out in USA - i.
Internal Combustion Engine Types
Hydrostatics
2 Stroke Engine
Statics