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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 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
Machine
Hydraulics
Weight
Power Equation
2. Combustion ignited by spark plug and materials are compressed
Third Stroke (4 Stroke Engine)
Statics
Force lets us do work on a system
Pressure Equation
3. Causes acceleration -Units: USA: 32.2 ft/s^2 SI: 9.8 m/sec^2
First Stroke (2 Stroke Engine)
More than one force
Law of Conservation of Mass
Gravity
4. Length / Time
System
Volume
Velocity
Rotation
5. Static - Dynamic
Diesel Engine
System
Mechanics describe how forces affect a body
Length
6. What we are not studying
Disc Breaks
Surroundings
Hydrostatics
Torque
7. Compression of fuel mix
Second Stroke (rotary)
Pythagorean Theorem
Fourth Stroke (rotary)
Inclined Plane
8. Length x Width
Volume
Open System
Area Equation
Newton's Second Law
9. ICE generates electricity for electric battery -Electric motor turns wheels
Fourth Stroke (Diesel Engine)
Second Stroke (2 Stroke Engine)
Base Dimensions
Hybrid Series
10. Liquid or gas
Area of a circle equation
Fluid
Power
Fluids
11. (pi) x (radius)^2
If the force is applied at the center of the rotation
Area of a circle equation
Forces and Vectors
no movement
12. ...
Applied Brakes
Force lets us do work on a system
Result of Applying a force to a rigid body at rest
Open System
13. Force/Area
Pressure Equation
Dynamics
Effort
Vectors
14. 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
Temperature
Area Equation
4 Stroke Engine
Common Brake Characteristics
15. Psi - newtons - pascals
Units for Pressure
4 Stroke Engine
Volume
Common Brake Characteristics
16. Weight/Time
Power Equation
Machine
Pythagorean Theorem Equation
More than one force
17. Are independent of other dimensions - They are limited in number - length - mass - time - temperature - force
Dynamics
Base Dimensions
System International (SI)
Inclined Plane
18. The branch of science and engineering involving measurement
Metrology
Temperature
Fluid Power
Inclined Plane
19. 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
Volume
4 Stroke Engine
Work
Moment Arm
20. Force without machine/Force with machine
Mechanical Advantage Equation
4 Stroke Engine
more than one force
Surroundings
21. 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
Torque
Applied Brakes
Velocity
Forces
22. (Force)(Distance)/Seconds
First Stroke (2 Stroke Engine)
Hybrid
Area
Power Equation
23. The designing of machines that contribute to society and our quality of life - Mechanical engineers apply the principles of mathematics - chemistry - and physics to solve real- world problems
Law of Conservation of Mass
Mechanical Engineering
Pythagorean Theorem
Pythagorean Theorem Equation
24. A pull on an object
will move
Mechanical Engineering
Work
Tension
25. Dimensions and units
2 Stroke Engine
Fourth Stroke (4 Stroke Engine)
Engineers and scientists need a common language
Rotation
26. A^2+b^2=c^2 - used to calculate vectors
Law of Conservation of Mass
Equation for Mechanical Advantage regarding inclined planes
Pythagorean Theorem
Second Stroke (4 Stroke Engine)
27. When the work done by the effort exceeds the work done by the load - the load...
Hybrid Series
Gravity
Aerodynamics
will move
28. Two stroke- Four Stroke- Diesel-Rotary -Hybrid
Dynamics
Third Stroke (4 Stroke Engine)
Common Brake Characteristics
Internal Combustion Engine Types
29. 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
Open System
Couple
Rotary
System
30. 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
Force Equation
Forces
Mechanical Advantage
Mass
31. 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
Shear
decrease
Hybrid
32. 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 (
Weight
Derived Dimension
System International (SI)
Surroundings
33. Four Stroke Engine -Used in hotter areas because more efficient -Higher compression ratio than gasoline
Mechanical Advantage Equation
Drum Brakes
Gravity
Diesel Engine
34. Modern Technology- More efficient-Better Cooling-Easier to service- longer life - lither weight- More expensive
decrease
Hybrid
Volume
Disc Breaks
35. Fuel is injected and combusts due to temperature of compressed air
Couple
Fluid Power
Static
Third Stroke (Diesel Engine)
36. Piston travels down and intake valve is opened. Intake of fuel and air into chamber
Force Equation
Machine
Compression
First Stroke (4 Stroke Engine)
37. When fluid is at rest
Hydrostatics
Internal Combustion Engine Types
Translation
Fluid
38. Result of gravity acting on mass -The greater the mass - the greater the weight -Is a force -Units: lbs - N
Weight
Velocity
Mechanics describe how forces affect a body
If the force is applied away from the center of rotation
39. Old technology- harder to service-Still used on big trucks and trailers because they are too expensive to convert
Mass
Volume
Dynamics
Drum Brakes
40. 1. Magnitude: size - a numberi.e. 50 mph 2. Direction: angle i.e. N -E -W -S
Mechanical Engineering
Forces and Vectors
First Stroke (4 Stroke Engine)
Moment Arm Equation
41. Can be reduced by decreasing the weight or force or increasing the area i.e. airbag
Fluid Power
Pressure
Power Equation
Second Stroke (rotary)
42. Both engines drive wheels -ICE used for cruising -Electric motor assists with low speed for acceleration and hill climbing
Mechanical Engineering
Hybrid Parallel
Volume
Pythagorean Theorem Equation
43. Air is compressed - work is done on the system
Second Stroke (Diesel Engine)
Volume
more than one force
Common Brake Characteristics
44. 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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45. Piston travels up and both plugs are closed
Forces and Vectors
Second Stroke (4 Stroke Engine)
Fluid Power
Power Equation
46. Incompressible (volume doesnt change) Transmit force evenly - Lubricates - Trap contaminants - Some based on vegetable oils - Biodegradable - Aircraft fluids noncombustible (thins as temperature rises)
Work
Power Equation
Fluids
If the force is applied at the center of the rotation
47. Intake of fuel and air mixture - compression of mixture by piston
Mechanics
Internal Combustion Engine Types
First Stroke (2 Stroke Engine)
Force Equation
48. Mass can neither by created nor destroyed - only transformed
Law of Conservation of Mass
Fourth Stroke (rotary)
Closed System
Pythagorean Theorem
49. Exhaust
Drum Brakes
Hydraulic Cylinders
Fourth Stroke (Diesel Engine)
Power Equation
50. Describes how applied forces bring a body into rest or equilibrium
Area
Forces
Second Stroke (4 Stroke Engine)
Statics
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