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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 small piece that makes up a larger whole. Each component is there for a specific job - but the sum of components
Hybrid
Open System
Couple
Component
2. Combustion of fuel mixture ignited by spark plug
First Stroke (rotary)
Aerodynamics
Second Stroke (2 Stroke Engine)
Drum Brakes
3. A pull on an object
Units
Component
Tension
Volume
4. A combination of components
Moment Arm
Derived Dimension
Area
System
5. 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)
Gravity
Power
First Stroke (rotary)
Fluid
6. 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
Surroundings
Acceleration
Translation
Rotary
7. Derived from - or composed of - base dimensions i.e. Area (length x width) - Weight (mass x acceleration) - velocity (length/time)
Derived Dimension
Power Equation
Steam Engine
Statics
8. External Combustion engine -Only used in factories and plants (not used in cars)
Base Dimensions
Vectors
Steam Engine
Area
9. Describes how applied forces bring a body into motion
Dynamics
Applied Brakes
Fourth Stroke (4 Stroke Engine)
Hydrodynamics
10. Compression-Tension-Shear
First Stroke (Diesel Engine)
Direction of Forces
Drum Brakes
Fourth Stroke (4 Stroke Engine)
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
Inclined Plane
Hybrid
4 Stroke Engine
Rotary
12. What we are studying
Direction of Forces
System
Volume
Hydraulics
13. Causes acceleration -Units: USA: 32.2 ft/s^2 SI: 9.8 m/sec^2
Units
Gravity
First Stroke (4 Stroke Engine)
Force lets us do work on a system
14. A change in velocity over time -Unites: USA- ft/s^2 and SI: m/s^2
Pressure Equation
System
Acceleration
Vectors
15. 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
Component
Units for Pressure
Aerodynamics
Work
16. Can be applied:-By direct contact: push - pull - twist -At a distance: gravity - magnetism Can change: speed - direction - shape - units of force
Result of Applying a force to a rigid body at rest
Aerodynamics
Forces
Fluids
17. Translation (slide) -Rotate -Slide and Rotate Together
Law of Conservation of Mass
Inclined Plane
System International (SI)
Result of Applying a force to a rigid body at rest
18. Used to measure or quantify -US Common: Absolute and Gravitational -SI: absolute
Couple
Second Stroke (Diesel Engine)
Surroundings
Units
19. Exhaust
Aerodynamics
Length
Power Equation
Fourth Stroke (Diesel Engine)
20. Rotation will not occur - but translation might occur
Equilibrium
If the force is applied away from the center of rotation
If the force is applied at the center of the rotation
Second Stroke (4 Stroke Engine)
21. Exhaust of combustion products
Hybrid Series
Fourth Stroke (rotary)
Power Equation
Statics
22. Varies by location (on earth) - distance (from earth) - and mass (of planet)
more than one force
Gravity
Mechanics describe how forces affect a body
Forces and Vectors
23. A fluid power system uses hydraulics and a fluid under pressure to create a greater force than is applied
Metrology
Second Stroke (4 Stroke Engine)
Rotary
Fluid Power
24. Liquid or gas
Compression
Mechanics
Pressure
Fluid
25. 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
Dynamics
will move
Mechanical Engineering
Effort
26. Four Stroke Engine -Used in hotter areas because more efficient -Higher compression ratio than gasoline
Mechanics describe how forces affect a body
Force lets us do work on a system
Open System
Diesel Engine
27. Applied at an angle or parallel to a surface
Internal Combustion Engine Types
Pythagorean Theorem
Fluids
Shear
28. Both engines drive wheels -ICE used for cruising -Electric motor assists with low speed for acceleration and hill climbing
Machine
Temperature
System International (SI)
Hybrid Parallel
29. The force simple machines use to do work on a single load or against a single force
Metrology
Common Brake Characteristics
Effort
Fluid Power
30. Can be applied at a time on an object
System International (SI)
Work
More than one force
Pressure
31. Fuel is injected and combusts due to temperature of compressed air
Fluid Power
Third Stroke (Diesel Engine)
Volume
more than one force
32. In a right triangle - the sum of the squares of the sides equals the square of the hypotenous
Shear
Pythagorean Theorem
Fluid
Hydraulics
33. Energy may enter or leave. Mass can enter or leave the system i.e. open water bottle - molecule - hydraulic cylinder - human
First Stroke (Diesel Engine)
Open System
Second Stroke (Diesel Engine)
Third Stroke (Diesel Engine)
34. Dimensions and units
Hydrostatics
Engineers and scientists need a common language
Closed System
Third Stroke (4 Stroke Engine)
35. A flat - two dimensional property -Units of length multiplied by length describe area -A=length x width
Diesel Engine
Area
Internal Combustion Engine Types
Fourth Stroke (rotary)
36. When the moving fluid is a gas
Dynamics
Rotary
Aerodynamics
First Stroke (Diesel Engine)
37. When the fluid is in motion
Hydrodynamics
Power
Power Equation
Disc Breaks
38. 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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39. 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
Surroundings
Common Brake Characteristics
Mechanics describe how forces affect a body
Newton's Second Law
40. Old technology- harder to service-Still used on big trucks and trailers because they are too expensive to convert
Gravity
Moment Arm Equation
Drum Brakes
Power Equation
41. Static - Dynamic
Length
Mechanics describe how forces affect a body
Volume
Newton's Second Law
42. Force/Area
Force Equation
Second Stroke (4 Stroke Engine)
Pressure Equation
Mechanics
43. 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.
no movement
2 Stroke Engine
Shear
Mechanics describe how forces affect a body
44. Mechanics is an application of math that describes how forces affect a body
Effort
Mechanical Advantage
Mechanics
If the force is applied at the center of the rotation
45. When a simple machine increases a force it is at the expense of a ____ in the distance the load is moved
Fourth Stroke (Diesel Engine)
Moment Arm Equation
decrease
Disc Breaks
46. Work/force or vertical distance/sloping distance
First Stroke (rotary)
Equation for Mechanical Advantage regarding inclined planes
Conversions
Pascal's Principle
47. Same pressure - work - volume - Different forces and distances
Mechanical Advantage
Hydraulics
Shear
Hydraulic Cylinders
48. Three- dimensional property measured in units of length times length times length =length x width x height
Common Brake Characteristics
Dimension
System
Volume
49. 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
Fluid
More than one force
Machine
Hydrodynamics
50. (pi) x (radius)^2
Area of a circle equation
Fourth Stroke (rotary)
no movement
Law of Conservation of Mass