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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. Body in motion (car)
System
Units
Power Equation
Dynamics
2. Ignition - power stroke
Third Stroke (rotary)
Temperature
Compression
Gravity
3. The branch of science and engineering involving measurement
2 Stroke Engine
Metrology
Mass
Tension
4. In a right triangle - the sum of the squares of the sides equals the square of the hypotenous
Vectors
Statics
Metrology
Pythagorean Theorem
5. 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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6. A flat - two dimensional property -Units of length multiplied by length describe area -A=length x width
Area
Direction of Forces
Disc Breaks
Hybrid Series
7. Force/Area
more than one force
Pressure Equation
Static
Hydraulics
8. Air is compressed - work is done on the system
Pythagorean Theorem Equation
Second Stroke (Diesel Engine)
Result of Applying a force to a rigid body at rest
System International (SI)
9. Two stroke- Four Stroke- Diesel-Rotary -Hybrid
Direction of Forces
Internal Combustion Engine Types
Hydrodynamics
Work
10. Varies by location (on earth) - distance (from earth) - and mass (of planet)
Gravity
Pressure Equation
Dynamics
Third Stroke (4 Stroke Engine)
11. When fluid is at rest
Area Equation
Hydrostatics
Vectors
Volume
12. A^2+b^2=c^2
Pythagorean Theorem Equation
If the force is applied away from the center of rotation
Equilibrium
Internal Combustion Engine Types
13. Exhaust
Fourth Stroke (rotary)
Fourth Stroke (Diesel Engine)
US Customary
Pythagorean Theorem
14. Dimensions and units
Engineers and scientists need a common language
Forces and Vectors
Result of Applying a force to a rigid body at rest
Equilibrium
15. Intake of fuel and air mixture - compression of mixture by piston
First Stroke (2 Stroke Engine)
Temperature
Pressure Equation
4 Stroke Engine
16. 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
Metrology
Equation for Mechanical Advantage regarding inclined planes
Rotary
Acceleration
17. Can be applied:-By direct contact: push - pull - twist -At a distance: gravity - magnetism Can change: speed - direction - shape - units of force
Forces
Mechanical Advantage
Law of Conservation of Mass
Second Stroke (rotary)
18. Work/force or vertical distance/sloping distance
Mechanical Engineering
Equation for Mechanical Advantage regarding inclined planes
Effort
Work
19. When the sum of all forces and the sum of all moments both equal forces - No movement
Equilibrium
Mechanical Engineering
Hybrid
Third Stroke (rotary)
20. Body at rest or is in equilibrium (wall)
Length
Static
US Customary
Shear
21. 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)
Hybrid
First Stroke (rotary)
Fluid Power
22. Applied at an angle or parallel to a surface
Machine
Shear
Conversions
Aerodynamics
23. Often a free body has _______ acting on it
Equilibrium
Vectors
Acceleration
more than one force
24. A change in velocity over time -Unites: USA- ft/s^2 and SI: m/s^2
Steam Engine
More than one force
Couple
Acceleration
25. A combination of components
First Stroke (Diesel Engine)
Gravity
Result of Applying a force to a rigid body at rest
System
26. 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
Hybrid Parallel
Hybrid
Hydraulics
decrease
27. When the moving fluid is a gas
Power Equation
Common Brake Characteristics
Aerodynamics
Gravity
28. External Combustion engine -Only used in factories and plants (not used in cars)
Aerodynamics
Force Equation
Steam Engine
Law of Conservation of Mass
29. The force simple machines use to do work on a single load or against a single force
Effort
Engineers and scientists need a common language
Mechanics
Volume
30. What we are studying
Shear
System International (SI)
System
Derived Dimension
31. 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
Third Stroke (rotary)
Volume
Mechanics describe how forces affect a body
Mechanical Advantage
32. ICE generates electricity for electric battery -Electric motor turns wheels
Internal Combustion Engine Types
Hydrodynamics
Newton's First Law of Motion
Hybrid Series
33. Air is drawn in
More than one force
Drum Brakes
First Stroke (Diesel Engine)
Rotation
34. 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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35. Incompressible (volume doesnt change) Transmit force evenly - Lubricates - Trap contaminants - Some based on vegetable oils - Biodegradable - Aircraft fluids noncombustible (thins as temperature rises)
Pressure Equation
Drum Brakes
Fluids
Gravity
36. When the fluid is in motion
Inclined Plane
Hydrodynamics
Weight
Hybrid Parallel
37. 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
Compression
Third Stroke (rotary)
Vectors
Gravity
38. When the work done by the effort exceeds the work done by the load - the load...
Conversions
More than one force
will move
Third Stroke (4 Stroke Engine)
39. 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
Moment Arm Equation
Applied Brakes
Gravity
Law of Conservation of Mass
40. If a force causes rotations -Vector- Machines can have more than one torque-Units: foot- pound and newton - meter - i.e. engines - airplanes - propeller
Closed System
Torque
Force lets us do work on a system
Fourth Stroke (Diesel Engine)
41. Length x Width x Height
Dynamics
Temperature
Moment Arm
Volume
42. 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)
Surroundings
Power
2 Stroke Engine
Conversions
43. Psi - newtons - pascals
Pythagorean Theorem
Result of Applying a force to a rigid body at rest
First Stroke (rotary)
Units for Pressure
44. Compression-Tension-Shear
Mechanical Engineering
System
Component
Direction of Forces
45. Rotation will not occur - but translation might occur
Volume
Diesel Engine
If the force is applied at the center of the rotation
Vectors
46. Intake of fuel and air mix
First Stroke (rotary)
Translation
Mechanical Advantage
Static
47. 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)
Inclined Plane
Direction of Forces
Newton's Second Law
48. Mass can neither by created nor destroyed - only transformed
Law of Conservation of Mass
Newton's First Law of Motion
2 Stroke Engine
Hydrostatics
49. 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
Drum Brakes
Units for Pressure
Fourth Stroke (Diesel Engine)
50. Liquid or gas
Result of Applying a force to a rigid body at rest
First Stroke (2 Stroke Engine)
Force lets us do work on a system
Fluid