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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 - used to calculate vectors
If the force is applied away from the center of rotation
Equilibrium
Translation
Pythagorean Theorem
2. (pi) x (radius)^2
Vectors
Area of a circle equation
Force lets us do work on a system
Forces and Vectors
3. Describes how applied forces bring a body into rest or equilibrium
Compression
First Stroke (4 Stroke Engine)
Component
Statics
4. One that pushes on an object
Tension
Diesel Engine
Pressure Equation
Compression
5. Can be reduced by decreasing the weight or force or increasing the area i.e. airbag
Gravity
Mechanical Advantage Equation
Disc Breaks
Pressure
6. Old technology- harder to service-Still used on big trucks and trailers because they are too expensive to convert
Open System
Force lets us do work on a system
Velocity
Drum Brakes
7. A movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)
Shear
Rotation
Velocity
Pressure Equation
8. Causes acceleration -Units: USA: 32.2 ft/s^2 SI: 9.8 m/sec^2
Gravity
2 Stroke Engine
Second Stroke (rotary)
More than one force
9. Both engines drive wheels -ICE used for cruising -Electric motor assists with low speed for acceleration and hill climbing
Hybrid Parallel
Direction of Forces
Pressure Equation
Fluid
10. Can be applied:-By direct contact: push - pull - twist -At a distance: gravity - magnetism Can change: speed - direction - shape - units of force
Internal Combustion Engine Types
Forces
Drum Brakes
Engineers and scientists need a common language
11. The branch of science and engineering involving measurement
Metrology
Third Stroke (4 Stroke Engine)
Weight
Steam Engine
12. Air is compressed - work is done on the system
Pythagorean Theorem
Tension
Pressure Equation
Second Stroke (Diesel Engine)
13. A flat - two dimensional property -Units of length multiplied by length describe area -A=length x width
Mechanics describe how forces affect a body
Area
Moment Arm Equation
Work
14. 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
Aerodynamics
Work
will move
Pressure Equation
15. 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.
2 Stroke Engine
Fluid
Surroundings
Work
16. (Force)(Distance)/Seconds
Power Equation
Mechanical Engineering
Hydraulics
Metrology
17. A change in velocity over time -Unites: USA- ft/s^2 and SI: m/s^2
Second Stroke (rotary)
Pythagorean Theorem
Moment Arm
Acceleration
18. 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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19. When a simple machine increases a force it is at the expense of a ____ in the distance the load is moved
Disc Breaks
Dimension
decrease
Units
20. In a hydraulic with an incompressible fluid - the total pressure at any point in the system is the same - liquid
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21. 1. Magnitude: size - a numberi.e. 50 mph 2. Direction: angle i.e. N -E -W -S
Second Stroke (Diesel Engine)
Forces and Vectors
Engineers and scientists need a common language
Translation
22. Psi - newtons - pascals
Units for Pressure
First Stroke (rotary)
Work
Inclined Plane
23. Piston travels up and exhaust valve opens. Combustion by product exhaustion
Fourth Stroke (4 Stroke Engine)
Pressure Equation
Hydrostatics
Static
24. Piston travels up and both plugs are closed
Second Stroke (4 Stroke Engine)
more than one force
Translation
Steam Engine
25. External Combustion engine -Only used in factories and plants (not used in cars)
Pythagorean Theorem
Hybrid Parallel
Mechanical Engineering
Steam Engine
26. Length x Width
Mechanics describe how forces affect a body
Area Equation
Power
Disc Breaks
27. Compression of fuel mix
Newton's Third Law
If the force is applied away from the center of rotation
Second Stroke (rotary)
Dynamics
28. The magnitude of something in a particular direction
Length
Weight
Units
Mechanics describe how forces affect a body
29. When the sum of all forces and the sum of all moments both equal forces - No movement
Pressure
Third Stroke (Diesel Engine)
Equilibrium
Direction of Forces
30. 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
Hydrostatics
Forces and Vectors
Mass
Couple
31. Exhaust
Fourth Stroke (Diesel Engine)
Disc Breaks
If the force is applied away from the center of rotation
Machine
32. Air is drawn in
First Stroke (Diesel Engine)
Dimension
Result of Applying a force to a rigid body at rest
Newton's Third Law
33. 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
Closed System
US Customary
Hydraulic Cylinders
Common Brake Characteristics
34. When the moving fluid is a gas
Translation
Derived Dimension
Aerodynamics
decrease
35. Force x Distance
Power Equation
Law of Conservation of Mass
Steam Engine
Moment Arm Equation
36. In a right triangle - the sum of the squares of the sides equals the square of the hypotenous
Force Equation
Vectors
Pythagorean Theorem
Aerodynamics
37. A combination of components
Hydraulics
Volume
Velocity
System
38. A small piece that makes up a larger whole. Each component is there for a specific job - but the sum of components
US Customary
Hybrid Series
System International (SI)
Component
39. Result of gravity acting on mass -The greater the mass - the greater the weight -Is a force -Units: lbs - N
Power Equation
Weight
System
Mechanical Advantage
40. Length / Time
Velocity
Surroundings
System
Force lets us do work on a system
41. Intake of fuel and air mixture - compression of mixture by piston
Mechanics describe how forces affect a body
Newton's Second Law
4 Stroke Engine
First Stroke (2 Stroke Engine)
42. Static - Dynamic
Temperature
Mechanics describe how forces affect a body
Mechanical Engineering
Dynamics
43. Describes a physical property of anything - What we are measuring
will move
Power
Area
Dimension
44. 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
US Customary
Hydrostatics
Moment Arm
Forces and Vectors
45. Two stroke- Four Stroke- Diesel-Rotary -Hybrid
Internal Combustion Engine Types
Moment Arm
Mechanics
Third Stroke (rotary)
46. 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
4 Stroke Engine
Shear
Hybrid
Gravity
47. 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
More than one force
Newton's Second Law
4 Stroke Engine
Units for Pressure
48. What we are not studying
Pressure Equation
Velocity
Surroundings
Pythagorean Theorem Equation
49. A^2+b^2=c^2
more than one force
Pythagorean Theorem Equation
Hydraulic Cylinders
System International (SI)
50. Mass x acceleration
Third Stroke (Diesel Engine)
Force Equation
Third Stroke (rotary)
Pythagorean Theorem