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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. ICE generates electricity for electric battery -Electric motor turns wheels
Rotary
Hybrid Series
Equilibrium
Volume
2. Fuel is injected and combusts due to temperature of compressed air
Forces and Vectors
Fluid Power
Temperature
Third Stroke (Diesel Engine)
3. Applied at an angle or parallel to a surface
Shear
Common Brake Characteristics
Hybrid
Moment Arm
4. When two parallel forces equal in magnitude and opposite direction - i.e. steering wheel - turn a know - turn on and off a faucet
Power Equation
will move
Law of Conservation of Mass
Couple
5. Old technology- harder to service-Still used on big trucks and trailers because they are too expensive to convert
Second Stroke (4 Stroke Engine)
Second Stroke (Diesel Engine)
If the force is applied away from the center of rotation
Drum Brakes
6. Static - Dynamic
System
Fourth Stroke (4 Stroke Engine)
Rotary
Mechanics describe how forces affect a body
7. Three- dimensional property measured in units of length times length times length =length x width x height
Rotary
Volume
Hydraulic Cylinders
Effort
8. Mass x acceleration
Second Stroke (4 Stroke Engine)
Force Equation
Rotary
Open System
9. Length x Width
Fourth Stroke (rotary)
Area Equation
Inclined Plane
Hydraulic Cylinders
10. Force without machine/Force with machine
Mechanical Advantage Equation
More than one force
Fourth Stroke (rotary)
Acceleration
11. Length / Time
Second Stroke (Diesel Engine)
Static
Velocity
Third Stroke (Diesel Engine)
12. (pi) x (radius)^2
Surroundings
Direction of Forces
Area of a circle equation
Common Brake Characteristics
13. 1. Magnitude: size - a numberi.e. 50 mph 2. Direction: angle i.e. N -E -W -S
Fluid Power
Newton's Third Law
Forces and Vectors
Hydrodynamics
14. Energy may enter or leave. No mass enters or leaves the system i.e. Closed water bottle - car engine - human
Closed System
Result of Applying a force to a rigid body at rest
System
no movement
15. Often a free body has _______ acting on it
Fourth Stroke (rotary)
more than one force
Dynamics
Acceleration
16. (Force)(Distance)/Seconds
Mechanical Advantage Equation
Dimension
Vectors
Power Equation
17. Piston travels up and exhaust valve opens. Combustion by product exhaustion
Volume
Fourth Stroke (4 Stroke Engine)
more than one force
Newton's Third Law
18. A flat - two dimensional property -Units of length multiplied by length describe area -A=length x width
Hybrid Parallel
Area of a circle equation
Fluid
Area
19. When the moving fluid is a gas
Fourth Stroke (rotary)
Aerodynamics
no movement
Result of Applying a force to a rigid body at rest
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. When the work done by the effort just equals the work done by the load - ______ of the machine will occur
Newton's Second Law
Moment Arm
Second Stroke (Diesel Engine)
no movement
22. 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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23. When a simple machine increases a force it is at the expense of a ____ in the distance the load is moved
decrease
Volume
Second Stroke (4 Stroke Engine)
Diesel Engine
24. An indication of kinetic energy of mass at the molecular level
Inclined Plane
no movement
Third Stroke (4 Stroke Engine)
Temperature
25. Length x Width x Height
More than one force
Metrology
Drum Brakes
Volume
26. Rotation will not occur - but translation might occur
Area of a circle equation
Component
If the force is applied at the center of the rotation
Area Equation
27. When the work done by the effort exceeds the work done by the load - the load...
Hybrid Parallel
Hybrid
will move
Third Stroke (Diesel Engine)
28. Air is drawn in
First Stroke (Diesel Engine)
decrease
Aerodynamics
Newton's Second Law
29. Compression-Tension-Shear
If the force is applied away from the center of rotation
Direction of Forces
will move
Compression
30. Energy may enter or leave. Mass can enter or leave the system i.e. open water bottle - molecule - hydraulic cylinder - human
Pythagorean Theorem
Diesel Engine
Disc Breaks
Open System
31. Two stroke- Four Stroke- Diesel-Rotary -Hybrid
Pascal's Principle
Fluids
First Stroke (rotary)
Internal Combustion Engine Types
32. The branch of science and engineering involving measurement
Metrology
First Stroke (2 Stroke Engine)
Velocity
2 Stroke Engine
33. When the sum of all forces and the sum of all moments both equal forces - No movement
Equilibrium
Internal Combustion Engine Types
Newton's Second Law
Hybrid
34. External Combustion engine -Only used in factories and plants (not used in cars)
If the force is applied at the center of the rotation
Work
Second Stroke (2 Stroke Engine)
Steam Engine
35. 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
Mechanics
Hydrodynamics
Area of a circle equation
36. Can be reduced by decreasing the weight or force or increasing the area i.e. airbag
Pressure
Diesel Engine
Moment Arm
System
37. Varies by location (on earth) - distance (from earth) - and mass (of planet)
will move
Fluid
Gravity
Volume
38. 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
Law of Conservation of Mass
First Stroke (Diesel Engine)
US Customary
Moment Arm Equation
39. The perpendicular distance from the pivot point to the point of application of the force (d) - M=Fd -Clockwise=Negative moment -Counterclockwise=Positive moment
Fluid
Moment Arm
Vectors
will move
40. Force x Distance
Units
Applied Brakes
Moment Arm Equation
Gravity
41. Body in motion (car)
Dynamics
Steam Engine
Second Stroke (4 Stroke Engine)
Tension
42. Combustion ignited by spark plug and materials are compressed
Hydraulic Cylinders
Third Stroke (4 Stroke Engine)
Torque
Hybrid
43. 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)
If the force is applied at the center of the rotation
Pythagorean Theorem
Power
Statics
44. Ignition - power stroke
Effort
Third Stroke (rotary)
US Customary
Newton's First Law of Motion
45. Compression of fuel mix
Second Stroke (rotary)
US Customary
Third Stroke (rotary)
Fourth Stroke (4 Stroke Engine)
46. Translation (slide) -Rotate -Slide and Rotate Together
Steam Engine
System International (SI)
Machine
Result of Applying a force to a rigid body at rest
47. 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
First Stroke (4 Stroke Engine)
If the force is applied at the center of the rotation
Forces
Common Brake Characteristics
48. Intake of fuel and air mixture - compression of mixture by piston
First Stroke (2 Stroke Engine)
Hybrid Parallel
Machine
Pressure Equation
49. What we are not studying
Statics
First Stroke (Diesel Engine)
Surroundings
Steam Engine
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.
Volume
2 Stroke Engine
Mechanics describe how forces affect a body
Third Stroke (Diesel Engine)