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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. 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
Component
Rotary
Engineers and scientists need a common language
Second Stroke (Diesel Engine)
2. Air is drawn in
First Stroke (Diesel Engine)
Third Stroke (4 Stroke Engine)
Newton's Third Law
Pythagorean Theorem Equation
3. Describes a physical property of anything - What we are measuring
Dimension
Effort
Disc Breaks
Acceleration
4. Piston travels down and intake valve is opened. Intake of fuel and air into chamber
Newton's Third Law
Hydrostatics
First Stroke (4 Stroke Engine)
Moment Arm Equation
5. Combustion of fuel mixture ignited by spark plug
Second Stroke (2 Stroke Engine)
Power Equation
Drum Brakes
System
6. The branch of science and engineering involving measurement
Fourth Stroke (Diesel Engine)
Vectors
Applied Brakes
Metrology
7. One that pushes on an object
Steam Engine
Force lets us do work on a system
Compression
US Customary
8. Length / Time
Velocity
Dynamics
Conversions
System International (SI)
9. 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
Units
Units for Pressure
Force Equation
10. Allows comparison between different measuring systems and units - Necessary to market internationally
Statics
First Stroke (4 Stroke Engine)
Conversions
Internal Combustion Engine Types
11. 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
Mechanical Engineering
Fourth Stroke (rotary)
Inclined Plane
Pressure
12. When the moving fluid is a gas
Length
Conversions
Aerodynamics
If the force is applied away from the center of rotation
13. A movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)
Moment Arm Equation
Rotation
Forces and Vectors
Force lets us do work on a system
14. When two parallel forces equal in magnitude and opposite direction - i.e. steering wheel - turn a know - turn on and off a faucet
Mechanical Engineering
Effort
Couple
Hybrid Series
15. Movement along a line (reciprocal or linear motion) -Units: feet and meters
more than one force
Newton's Second Law
Pythagorean Theorem
Translation
16. External Combustion engine -Only used in factories and plants (not used in cars)
Steam Engine
Hydraulics
Hybrid Parallel
Mechanical Engineering
17. Old technology- harder to service-Still used on big trucks and trailers because they are too expensive to convert
Result of Applying a force to a rigid body at rest
Drum Brakes
Newton's Third Law
Mechanics describe how forces affect a body
18. Result of gravity acting on mass -The greater the mass - the greater the weight -Is a force -Units: lbs - N
Vectors
Fluids
Moment Arm
Weight
19. Intake of fuel and air mix
Translation
Power Equation
First Stroke (rotary)
Disc Breaks
20. Translation (slide) -Rotate -Slide and Rotate Together
Result of Applying a force to a rigid body at rest
Engineers and scientists need a common language
Rotary
Pressure
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
Applied Brakes
Mechanics
Machine
Compression
22. 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
Closed System
Hydraulics
Machine
Vectors
23. Three- dimensional property measured in units of length times length times length =length x width x height
Area of a circle equation
more than one force
decrease
Volume
24. The perpendicular distance from the pivot point to the point of application of the force (d) - M=Fd -Clockwise=Negative moment -Counterclockwise=Positive moment
Moment Arm
Forces
Hydraulic Cylinders
Volume
25. Combustion ignited by spark plug and materials are compressed
Third Stroke (4 Stroke Engine)
Common Brake Characteristics
Third Stroke (Diesel Engine)
no movement
26. Energy may enter or leave. No mass enters or leaves the system i.e. Closed water bottle - car engine - human
Closed System
Conversions
First Stroke (rotary)
Hybrid Parallel
27. Compression-Tension-Shear
Direction of Forces
Third Stroke (4 Stroke Engine)
More than one force
If the force is applied at the center of the rotation
28. Work/force or vertical distance/sloping distance
Pressure Equation
Common Brake Characteristics
Equation for Mechanical Advantage regarding inclined planes
First Stroke (2 Stroke Engine)
29. Describes how applied forces bring a body into rest or equilibrium
Hydrodynamics
Statics
Effort
Pythagorean Theorem
30. 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
Mechanical Engineering
Work
Derived Dimension
Units for Pressure
31. 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
Fourth Stroke (rotary)
Pythagorean Theorem Equation
Mass
First Stroke (rotary)
32. Can be applied at a time on an object
Newton's First Law of Motion
Mechanical Advantage Equation
Equation for Mechanical Advantage regarding inclined planes
More than one force
33. Modern Technology- More efficient-Better Cooling-Easier to service- longer life - lither weight- More expensive
Units
Equation for Mechanical Advantage regarding inclined planes
Velocity
Disc Breaks
34. Intake of fuel and air mixture - compression of mixture by piston
Law of Conservation of Mass
more than one force
Compression
First Stroke (2 Stroke Engine)
35. Body in motion (car)
Compression
Area of a circle equation
Dynamics
Hydraulic Cylinders
36. 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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37. Force/Area
Hydraulic Cylinders
Dynamics
Hydrodynamics
Pressure Equation
38. 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
Hydrodynamics
no movement
Couple
Mechanical Advantage
39. Exhaust
Fourth Stroke (Diesel Engine)
Hybrid Parallel
Length
Mass
40. Used to measure or quantify -US Common: Absolute and Gravitational -SI: absolute
Units
System International (SI)
Hybrid Series
Hybrid
41. ICE generates electricity for electric battery -Electric motor turns wheels
Fluid
Fourth Stroke (4 Stroke Engine)
Hybrid
Hybrid Series
42. Ignition - power stroke
Volume
Fluids
Fourth Stroke (Diesel Engine)
Third Stroke (rotary)
43. Liquid or gas
Units for Pressure
Third Stroke (rotary)
Acceleration
Fluid
44. Exhaust of combustion products
Internal Combustion Engine Types
Fourth Stroke (rotary)
Tension
More than one force
45. 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
First Stroke (4 Stroke Engine)
Forces and Vectors
46. Piston travels up and exhaust valve opens. Combustion by product exhaustion
Disc Breaks
Component
Newton's First Law of Motion
Fourth Stroke (4 Stroke Engine)
47. Are independent of other dimensions - They are limited in number - length - mass - time - temperature - force
Pythagorean Theorem Equation
Mechanical Engineering
Newton's First Law of Motion
Base Dimensions
48. Same pressure - work - volume - Different forces and distances
Second Stroke (2 Stroke Engine)
US Customary
Hydraulic Cylinders
Moment Arm
49. Energy may enter or leave. Mass can enter or leave the system i.e. open water bottle - molecule - hydraulic cylinder - human
Dynamics
System
Hybrid
Open System
50. 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
Third Stroke (Diesel Engine)
Effort
Second Stroke (rotary)