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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. Air is drawn in
Pascal's Principle
First Stroke (Diesel Engine)
Mechanical Advantage
Base Dimensions
2. Describes how applied forces bring a body into rest or equilibrium
Statics
Steam Engine
Derived Dimension
Base Dimensions
3. 1. Magnitude: size - a numberi.e. 50 mph 2. Direction: angle i.e. N -E -W -S
Forces and Vectors
Newton's First Law of Motion
2 Stroke Engine
Derived Dimension
4. Length x Width
2 Stroke Engine
Pythagorean Theorem Equation
Area Equation
Pressure
5. The magnitude of something in a particular direction
Dimension
Mass
Length
Power Equation
6. Rotation will not occur - but translation might occur
Fluid Power
Machine
First Stroke (4 Stroke Engine)
If the force is applied at the center of the rotation
7. A pull on an object
Tension
Drum Brakes
Units
Mechanics
8. A movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)
Mechanical Advantage
Forces and Vectors
Pythagorean Theorem
Rotation
9. A flat - two dimensional property -Units of length multiplied by length describe area -A=length x width
Power Equation
Torque
First Stroke (2 Stroke Engine)
Area
10. External Combustion engine -Only used in factories and plants (not used in cars)
Steam Engine
Aerodynamics
Mechanical Engineering
Second Stroke (2 Stroke Engine)
11. Two stroke- Four Stroke- Diesel-Rotary -Hybrid
Internal Combustion Engine Types
Translation
Weight
Volume
12. Mass x acceleration
Rotation
Moment Arm Equation
Hydraulic Cylinders
Force Equation
13. Varies by location (on earth) - distance (from earth) - and mass (of planet)
Gravity
Second Stroke (4 Stroke Engine)
Forces and Vectors
Power Equation
14. What we are studying
will move
Drum Brakes
Fluid
System
15. Length x Width x Height
Component
Open System
Forces
Volume
16. Mass can neither by created nor destroyed - only transformed
US Customary
Law of Conservation of Mass
4 Stroke Engine
Inclined Plane
17. Piston travels up and exhaust valve opens. Combustion by product exhaustion
Fourth Stroke (4 Stroke Engine)
Moment Arm
System
Couple
18. Applied at an angle or parallel to a surface
Power
Shear
Temperature
Hybrid
19. 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
Derived Dimension
System
Effort
Machine
20. Incompressible (volume doesnt change) Transmit force evenly - Lubricates - Trap contaminants - Some based on vegetable oils - Biodegradable - Aircraft fluids noncombustible (thins as temperature rises)
Forces
Third Stroke (Diesel Engine)
Fluids
Conversions
21. In a right triangle - the sum of the squares of the sides equals the square of the hypotenous
Metrology
Pythagorean Theorem
Second Stroke (2 Stroke Engine)
more than one force
22. Old technology- harder to service-Still used on big trucks and trailers because they are too expensive to convert
First Stroke (Diesel Engine)
Drum Brakes
Weight
Mechanical Advantage Equation
23. 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.
Result of Applying a force to a rigid body at rest
Hybrid
Static
2 Stroke Engine
24. 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
System International (SI)
Common Brake Characteristics
Fourth Stroke (Diesel Engine)
US Customary
25. When the sum of all forces and the sum of all moments both equal forces - No movement
Equilibrium
Units
Hybrid
Static
26. 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
Volume
Third Stroke (rotary)
Vectors
Rotary
27. A small piece that makes up a larger whole. Each component is there for a specific job - but the sum of components
Force lets us do work on a system
Disc Breaks
Diesel Engine
Component
28. 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
Equation for Mechanical Advantage regarding inclined planes
Hybrid Series
Second Stroke (4 Stroke Engine)
Common Brake Characteristics
29. 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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30. ...
Closed System
decrease
Force lets us do work on a system
Fourth Stroke (4 Stroke Engine)
31. Can be reduced by decreasing the weight or force or increasing the area i.e. airbag
Acceleration
Pressure
decrease
US Customary
32. Ignition - power stroke
Third Stroke (rotary)
Law of Conservation of Mass
Vectors
Mechanical Advantage Equation
33. One that pushes on an object
Mechanical Advantage
Work
Hydraulics
Compression
34. Work/force or vertical distance/sloping distance
Work
Pascal's Principle
Dynamics
Equation for Mechanical Advantage regarding inclined planes
35. Intake of fuel and air mix
System International (SI)
First Stroke (rotary)
Forces and Vectors
Equation for Mechanical Advantage regarding inclined planes
36. A^2+b^2=c^2 - used to calculate vectors
Couple
Fourth Stroke (rotary)
Pythagorean Theorem
Drum Brakes
37. Can be applied:-By direct contact: push - pull - twist -At a distance: gravity - magnetism Can change: speed - direction - shape - units of force
Newton's First Law of Motion
Aerodynamics
Pythagorean Theorem
Forces
38. Force/Area
Moment Arm
More than one force
Pascal's Principle
Pressure Equation
39. 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
Weight
Mass
Third Stroke (4 Stroke Engine)
Torque
40. Energy may enter or leave. No mass enters or leaves the system i.e. Closed water bottle - car engine - human
System
If the force is applied at the center of the rotation
4 Stroke Engine
Closed System
41. 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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42. A change in velocity over time -Unites: USA- ft/s^2 and SI: m/s^2
Pythagorean Theorem
Fourth Stroke (Diesel Engine)
Acceleration
US Customary
43. Combustion ignited by spark plug and materials are compressed
Dynamics
Third Stroke (4 Stroke Engine)
Internal Combustion Engine Types
First Stroke (rotary)
44. 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 (
System International (SI)
Internal Combustion Engine Types
US Customary
Hydraulics
45. (pi) x (radius)^2
Moment Arm
Pascal's Principle
Fluids
Area of a circle equation
46. Fuel is injected and combusts due to temperature of compressed air
Shear
Fluids
Third Stroke (Diesel Engine)
More than one force
47. Causes acceleration -Units: USA: 32.2 ft/s^2 SI: 9.8 m/sec^2
4 Stroke Engine
Open System
Gravity
Translation
48. ICE generates electricity for electric battery -Electric motor turns wheels
Volume
Hybrid Series
System International (SI)
Internal Combustion Engine Types
49. A fluid power system uses hydraulics and a fluid under pressure to create a greater force than is applied
will move
Mechanical Advantage
Fluid Power
Pythagorean Theorem
50. Exhaust
Fourth Stroke (Diesel Engine)
Third Stroke (Diesel Engine)
Power
Second Stroke (rotary)