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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. When the fluid is in motion
Power
Rotary
Hydrodynamics
Mechanical Engineering
2. Describes how applied forces bring a body into motion
Dynamics
Third Stroke (rotary)
Pascal's Principle
Statics
3. Old technology- harder to service-Still used on big trucks and trailers because they are too expensive to convert
Drum Brakes
First Stroke (Diesel Engine)
Pressure
Area
4. 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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5. If a force causes rotations -Vector- Machines can have more than one torque-Units: foot- pound and newton - meter - i.e. engines - airplanes - propeller
Conversions
Mechanical Engineering
First Stroke (4 Stroke Engine)
Torque
6. 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
Work
Units for Pressure
Power Equation
Fourth Stroke (4 Stroke Engine)
7. Four Stroke Engine -Used in hotter areas because more efficient -Higher compression ratio than gasoline
Surroundings
Diesel Engine
Tension
Base Dimensions
8. When two parallel forces equal in magnitude and opposite direction - i.e. steering wheel - turn a know - turn on and off a faucet
Equilibrium
Conversions
Couple
no movement
9. Fuel is injected and combusts due to temperature of compressed air
Area Equation
First Stroke (4 Stroke Engine)
Hydrodynamics
Third Stroke (Diesel Engine)
10. Intake of fuel and air mix
Equation for Mechanical Advantage regarding inclined planes
Steam Engine
Hydraulic Cylinders
First Stroke (rotary)
11. Force/Area
Internal Combustion Engine Types
Units
Shear
Pressure Equation
12. The branch of science and engineering involving measurement
Second Stroke (2 Stroke Engine)
Metrology
System
Gravity
13. Mass x acceleration
Force Equation
Second Stroke (rotary)
Area Equation
Open System
14. Rotation will not occur - but translation might occur
Third Stroke (Diesel Engine)
If the force is applied at the center of the rotation
Moment Arm
Base Dimensions
15. In a hydraulic with an incompressible fluid - the total pressure at any point in the system is the same - liquid
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16. Air is compressed - work is done on the system
Translation
Second Stroke (Diesel Engine)
Compression
Effort
17. Body at rest or is in equilibrium (wall)
More than one force
Static
Common Brake Characteristics
Fluid
18. Piston travels up and exhaust valve opens. Combustion by product exhaustion
Fourth Stroke (4 Stroke Engine)
Torque
Mechanics describe how forces affect a body
Pythagorean Theorem
19. Can be reduced by decreasing the weight or force or increasing the area i.e. airbag
Pressure
Hydraulic Cylinders
Rotary
Direction of Forces
20. One that pushes on an object
Hybrid Series
Compression
US Customary
Fourth Stroke (rotary)
21. 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
Newton's Third Law
Dimension
US Customary
Pythagorean Theorem Equation
22. A pull on an object
Component
Pythagorean Theorem
Tension
Weight
23. Same pressure - work - volume - Different forces and distances
Hybrid Parallel
Pressure
Hydraulic Cylinders
4 Stroke Engine
24. Intake of fuel and air mixture - compression of mixture by piston
First Stroke (2 Stroke Engine)
Aerodynamics
Power Equation
First Stroke (4 Stroke Engine)
25. 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
Internal Combustion Engine Types
First Stroke (Diesel Engine)
Second Stroke (4 Stroke Engine)
26. 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
Third Stroke (Diesel Engine)
Pythagorean Theorem Equation
Pascal's Principle
Hybrid
27. When the sum of all forces and the sum of all moments both equal forces - No movement
Hybrid Parallel
Equilibrium
Diesel Engine
Mass
28. When a simple machine increases a force it is at the expense of a ____ in the distance the load is moved
First Stroke (rotary)
Component
Equilibrium
decrease
29. When the work done by the effort just equals the work done by the load - ______ of the machine will occur
Length
no movement
Hydrodynamics
Third Stroke (rotary)
30. External Combustion engine -Only used in factories and plants (not used in cars)
Steam Engine
Work
Newton's Second Law
Length
31. 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
Units for Pressure
Second Stroke (Diesel Engine)
Inclined Plane
Equation for Mechanical Advantage regarding inclined planes
32. Length x Width x Height
Applied Brakes
Volume
Newton's Third Law
Moment Arm Equation
33. The force simple machines use to do work on a single load or against a single force
Mechanics describe how forces affect a body
Torque
Effort
Fourth Stroke (rotary)
34. Movement along a line (reciprocal or linear motion) -Units: feet and meters
Shear
Translation
Units for Pressure
Newton's First Law of Motion
35. 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
Torque
Machine
Equation for Mechanical Advantage regarding inclined planes
Length
36. ICE generates electricity for electric battery -Electric motor turns wheels
Law of Conservation of Mass
Velocity
Hybrid Series
Volume
37. 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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38. 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
Second Stroke (4 Stroke Engine)
Vectors
Length
Static
39. A change in velocity over time -Unites: USA- ft/s^2 and SI: m/s^2
Acceleration
First Stroke (4 Stroke Engine)
Machine
Hydraulic Cylinders
40. Mechanics is an application of math that describes how forces affect a body
Mechanics
Fluids
Internal Combustion Engine Types
Forces
41. 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 (
Equation for Mechanical Advantage regarding inclined planes
System International (SI)
Couple
Hydraulics
42. Energy may enter or leave. No mass enters or leaves the system i.e. Closed water bottle - car engine - human
Third Stroke (Diesel Engine)
Power Equation
Disc Breaks
Closed System
43. Allows comparison between different measuring systems and units - Necessary to market internationally
Fluids
Conversions
Derived Dimension
Mechanical Engineering
44. Causes acceleration -Units: USA: 32.2 ft/s^2 SI: 9.8 m/sec^2
Forces and Vectors
Vectors
Second Stroke (rotary)
Gravity
45. 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
Mechanical Advantage
Disc Breaks
Velocity
46. What we are not studying
Surroundings
Drum Brakes
Translation
Hybrid
47. Applied at an angle or parallel to a surface
Shear
Diesel Engine
Weight
Conversions
48. The perpendicular distance from the pivot point to the point of application of the force (d) - M=Fd -Clockwise=Negative moment -Counterclockwise=Positive moment
Moment Arm
Rotation
Pressure Equation
Newton's Third Law
49. 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.
Newton's First Law of Motion
Area Equation
Area
2 Stroke Engine
50. Can be applied:-By direct contact: push - pull - twist -At a distance: gravity - magnetism Can change: speed - direction - shape - units of force
Forces
Machine
Third Stroke (Diesel Engine)
Force Equation