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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 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
System
Mechanics
Weight
2. Two stroke- Four Stroke- Diesel-Rotary -Hybrid
Hydrodynamics
decrease
First Stroke (4 Stroke Engine)
Internal Combustion Engine Types
3. Both engines drive wheels -ICE used for cruising -Electric motor assists with low speed for acceleration and hill climbing
Work
Hydraulics
Hybrid Parallel
Third Stroke (rotary)
4. Ignition - power stroke
US Customary
Mechanical Advantage Equation
will move
Third Stroke (rotary)
5. Exhaust of combustion products
Fourth Stroke (rotary)
Pressure Equation
Pascal's Principle
Mechanics
6. Compression of fuel mix
Mechanics describe how forces affect a body
more than one force
Second Stroke (rotary)
Rotation
7. What we are not studying
Area Equation
Surroundings
Fourth Stroke (rotary)
System
8. One that pushes on an object
Common Brake Characteristics
Law of Conservation of Mass
Compression
will move
9. Force without machine/Force with machine
Newton's First Law of Motion
Direction of Forces
Hydrostatics
Mechanical Advantage Equation
10. When the work done by the effort just equals the work done by the load - ______ of the machine will occur
Newton's Second Law
Units
no movement
Machine
11. 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
Hybrid
Derived Dimension
US Customary
Rotation
12. Varies by location (on earth) - distance (from earth) - and mass (of planet)
Third Stroke (rotary)
Units
Gravity
Second Stroke (rotary)
13. Movement along a line (reciprocal or linear motion) -Units: feet and meters
Steam Engine
Result of Applying a force to a rigid body at rest
Translation
Conversions
14. Energy may enter or leave. Mass can enter or leave the system i.e. open water bottle - molecule - hydraulic cylinder - human
Fourth Stroke (Diesel Engine)
Open System
System
Acceleration
15. Force/Area
Power
If the force is applied at the center of the rotation
More than one force
Pressure Equation
16. Intake of fuel and air mixture - compression of mixture by piston
Third Stroke (rotary)
Mass
First Stroke (2 Stroke Engine)
Moment Arm
17. 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
Second Stroke (Diesel Engine)
Effort
Third Stroke (Diesel Engine)
18. Air is drawn in
Work
First Stroke (Diesel Engine)
Equation for Mechanical Advantage regarding inclined planes
Force Equation
19. Mechanics is an application of math that describes how forces affect a body
Mechanics
Second Stroke (4 Stroke Engine)
no movement
Drum Brakes
20. 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 (
Direction of Forces
no movement
Rotary
System International (SI)
21. A movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)
Law of Conservation of Mass
Rotation
4 Stroke Engine
Fourth Stroke (4 Stroke Engine)
22. 1. Magnitude: size - a numberi.e. 50 mph 2. Direction: angle i.e. N -E -W -S
4 Stroke Engine
Forces and Vectors
Fluid
will move
23. Describes a physical property of anything - What we are measuring
Dimension
Moment Arm
Volume
Weight
24. When the fluid is in motion
Hydrodynamics
Translation
Work
Area of a circle equation
25. ...
Vectors
Area of a circle equation
Engineers and scientists need a common language
Force lets us do work on a system
26. A^2+b^2=c^2
Pythagorean Theorem
Length
Pythagorean Theorem Equation
Engineers and scientists need a common language
27. Incompressible (volume doesnt change) Transmit force evenly - Lubricates - Trap contaminants - Some based on vegetable oils - Biodegradable - Aircraft fluids noncombustible (thins as temperature rises)
Power Equation
Fluids
Mechanical Advantage
Dimension
28. 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
Third Stroke (rotary)
Dynamics
more than one force
29. Force x Distance
Mechanical Advantage Equation
Moment Arm Equation
Area of a circle equation
Hybrid
30. ICE generates electricity for electric battery -Electric motor turns wheels
Mechanical Engineering
First Stroke (2 Stroke Engine)
Hybrid Series
Steam Engine
31. Fuel is injected and combusts due to temperature of compressed air
More than one force
Diesel Engine
Third Stroke (Diesel Engine)
Component
32. 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
4 Stroke Engine
Equation for Mechanical Advantage regarding inclined planes
System International (SI)
More than one force
33. Exhaust
Power
Fourth Stroke (Diesel Engine)
Aerodynamics
Hydraulic Cylinders
34. 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
Dynamics
Newton's Second Law
Applied Brakes
Hydrostatics
35. When two parallel forces equal in magnitude and opposite direction - i.e. steering wheel - turn a know - turn on and off a faucet
Hydraulics
Couple
Tension
Closed System
36. 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
Effort
Static
Inclined Plane
System
37. Air is compressed - work is done on the system
Drum Brakes
Second Stroke (Diesel Engine)
Base Dimensions
Forces and Vectors
38. When the sum of all forces and the sum of all moments both equal forces - No movement
Equilibrium
More than one force
If the force is applied at the center of the rotation
Mass
39. A pull on an object
Tension
Power Equation
Mechanics describe how forces affect a body
Internal Combustion Engine Types
40. 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
Vectors
Hydraulic Cylinders
Rotation
Steam Engine
41. A fluid power system uses hydraulics and a fluid under pressure to create a greater force than is applied
Second Stroke (4 Stroke Engine)
Hydraulic Cylinders
Fluid Power
Newton's First Law of Motion
42. Combustion ignited by spark plug and materials are compressed
Shear
Drum Brakes
Base Dimensions
Third Stroke (4 Stroke Engine)
43. Intake of fuel and air mix
Hydrodynamics
If the force is applied away from the center of rotation
First Stroke (rotary)
Hydraulics
44. Result of gravity acting on mass -The greater the mass - the greater the weight -Is a force -Units: lbs - N
Forces
Fluid
Dynamics
Weight
45. (Force)(Distance)/Seconds
Internal Combustion Engine Types
Translation
Power Equation
Pythagorean Theorem
46. 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
Pressure
Moment Arm
Machine
Inclined Plane
47. Body in motion (car)
First Stroke (Diesel Engine)
Dynamics
Surroundings
Newton's Second Law
48. If a force causes rotations -Vector- Machines can have more than one torque-Units: foot- pound and newton - meter - i.e. engines - airplanes - propeller
Dimension
Forces
Torque
US Customary
49. An indication of kinetic energy of mass at the molecular level
Temperature
Hydraulics
Pressure
Velocity
50. 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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