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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. Three- dimensional property measured in units of length times length times length =length x width x height
Hydrostatics
Volume
Machine
Torque
2. When the fluid is in motion
Second Stroke (Diesel Engine)
US Customary
Hydrodynamics
Velocity
3. Describes a physical property of anything - What we are measuring
Mechanics
Dimension
Third Stroke (rotary)
Mechanical Advantage Equation
4. External Combustion engine -Only used in factories and plants (not used in cars)
Third Stroke (Diesel Engine)
Hydrostatics
Velocity
Steam Engine
5. Varies by location (on earth) - distance (from earth) - and mass (of planet)
Vectors
Closed System
Gravity
Compression
6. Mass x acceleration
Second Stroke (Diesel Engine)
Second Stroke (4 Stroke Engine)
Force Equation
Temperature
7. Force without machine/Force with machine
Weight
Mechanical Advantage Equation
Hybrid Parallel
First Stroke (rotary)
8. A^2+b^2=c^2
Pythagorean Theorem Equation
Compression
Power Equation
Statics
9. 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
Torque
Pascal's Principle
Effort
Vectors
10. Causes acceleration -Units: USA: 32.2 ft/s^2 SI: 9.8 m/sec^2
Effort
Gravity
Hybrid Series
Area
11. Both engines drive wheels -ICE used for cruising -Electric motor assists with low speed for acceleration and hill climbing
Statics
Surroundings
Mechanical Engineering
Hybrid Parallel
12. 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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13. Intake of fuel and air mix
First Stroke (rotary)
Metrology
Shear
Newton's First Law of Motion
14. What we are studying
System
Conversions
Gravity
Mechanics
15. Can be reduced by decreasing the weight or force or increasing the area i.e. airbag
Static
Second Stroke (4 Stroke Engine)
Pressure
Pascal's Principle
16. Weight/Time
Common Brake Characteristics
will move
Power Equation
Closed System
17. A combination of components
Vectors
System
Rotation
Mechanics
18. Result of gravity acting on mass -The greater the mass - the greater the weight -Is a force -Units: lbs - N
Disc Breaks
Weight
First Stroke (4 Stroke Engine)
Mass
19. Four Stroke Engine -Used in hotter areas because more efficient -Higher compression ratio than gasoline
decrease
Diesel Engine
Hybrid Series
Acceleration
20. A change in velocity over time -Unites: USA- ft/s^2 and SI: m/s^2
Hydraulics
Acceleration
Second Stroke (2 Stroke Engine)
Mechanical Advantage
21. 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
US Customary
Torque
Hydraulic Cylinders
22. 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
Gravity
US Customary
Internal Combustion Engine Types
Units
23. 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
Drum Brakes
Third Stroke (rotary)
Diesel Engine
24. Exhaust of combustion products
Third Stroke (rotary)
Fourth Stroke (rotary)
Result of Applying a force to a rigid body at rest
Hybrid Parallel
25. Modern Technology- More efficient-Better Cooling-Easier to service- longer life - lither weight- More expensive
Metrology
Length
Disc Breaks
Hybrid Parallel
26. Length x Width
Pascal's Principle
Steam Engine
Area Equation
Volume
27. A movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)
Rotation
Mass
Newton's Second Law
Gravity
28. The force simple machines use to do work on a single load or against a single force
If the force is applied away from the center of rotation
Dynamics
Metrology
Effort
29. Same pressure - work - volume - Different forces and distances
Hydraulic Cylinders
Derived Dimension
Rotary
Hybrid Parallel
30. When the moving fluid is a gas
Vectors
Fourth Stroke (4 Stroke Engine)
Pythagorean Theorem
Aerodynamics
31. Air is drawn in
Derived Dimension
Tension
Surroundings
First Stroke (Diesel Engine)
32. Liquid or gas
Fluid
Dynamics
Static
Effort
33. Used to measure or quantify -US Common: Absolute and Gravitational -SI: absolute
Units
Moment Arm Equation
Hybrid
Second Stroke (2 Stroke Engine)
34. 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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35. A fluid power system uses hydraulics and a fluid under pressure to create a greater force than is applied
Force Equation
Second Stroke (4 Stroke Engine)
Fluid Power
Common Brake Characteristics
36. Can be applied:-By direct contact: push - pull - twist -At a distance: gravity - magnetism Can change: speed - direction - shape - units of force
Forces
Direction of Forces
If the force is applied at the center of the rotation
Third Stroke (rotary)
37. When the work done by the effort just equals the work done by the load - ______ of the machine will occur
will move
no movement
Translation
Mechanical Engineering
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
Third Stroke (Diesel Engine)
Compression
First Stroke (rotary)
39. Tells us how fast work is done - varies with time (more power is needed to do work in less time - and less power is needed to do work in more time) =Fd/s -Units: USA: ft- lb/s SI: watts (J/S)
Newton's Third Law
Hybrid Parallel
Power
Newton's First Law of Motion
40. 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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41. Piston travels up and both plugs are closed
Vectors
Fourth Stroke (rotary)
More than one force
Second Stroke (4 Stroke Engine)
42. What we are not studying
Pascal's Principle
Area Equation
Surroundings
Hybrid Parallel
43. Translation (slide) -Rotate -Slide and Rotate Together
Pythagorean Theorem
Newton's Third Law
Pascal's Principle
Result of Applying a force to a rigid body at rest
44. Body in motion (car)
Dynamics
Effort
Moment Arm Equation
Mechanical Advantage
45. An application of Pascal's Principle (trading distance and force while doing the same amount of work) -Gives a mechanical advantage -The muscles of machines - used to produce very large forces - use a fluid under pressure (gas is low pressure and liq
Pythagorean Theorem Equation
Newton's Third Law
Volume
Hydraulics
46. Rotation will not occur - but translation might occur
Closed System
Moment Arm
Disc Breaks
If the force is applied at the center of the rotation
47. Ignition - power stroke
System International (SI)
Inclined Plane
Mechanical Engineering
Third Stroke (rotary)
48. Energy may enter or leave. Mass can enter or leave the system i.e. open water bottle - molecule - hydraulic cylinder - human
Power
will move
Area Equation
Open System
49. When a simple machine increases a force it is at the expense of a ____ in the distance the load is moved
decrease
Units for Pressure
Newton's Second Law
Law of Conservation of Mass
50. One that pushes on an object
Fourth Stroke (4 Stroke Engine)
Compression
Couple
If the force is applied at the center of the rotation