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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. 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
Second Stroke (rotary)
Equilibrium
Hybrid
will move
2. Length x Width
Second Stroke (4 Stroke Engine)
Inclined Plane
Area Equation
Drum Brakes
3. Air is drawn in
Power Equation
more than one force
Fourth Stroke (Diesel Engine)
First Stroke (Diesel Engine)
4. Applied at an angle or parallel to a surface
Mechanics
Shear
Newton's Second Law
Rotation
5. Force without machine/Force with machine
Hydraulic Cylinders
Area
Common Brake Characteristics
Mechanical Advantage Equation
6. When two parallel forces equal in magnitude and opposite direction - i.e. steering wheel - turn a know - turn on and off a faucet
Volume
no movement
Couple
Pythagorean Theorem
7. Translation (slide) -Rotate -Slide and Rotate Together
Result of Applying a force to a rigid body at rest
Hydrodynamics
Component
Vectors
8. Body at rest or is in equilibrium (wall)
Static
Vectors
Torque
Temperature
9. 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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10. What we are not studying
Applied Brakes
Pythagorean Theorem
Hydrostatics
Surroundings
11. Can be applied at a time on an object
Second Stroke (4 Stroke Engine)
More than one force
Third Stroke (4 Stroke Engine)
First Stroke (Diesel Engine)
12. The magnitude of something in a particular direction
Length
Hydraulics
Compression
more than one force
13. When fluid is at rest
Derived Dimension
Couple
Closed System
Hydrostatics
14. Four Stroke Engine -Used in hotter areas because more efficient -Higher compression ratio than gasoline
Diesel Engine
Mechanics
If the force is applied away from the center of rotation
Second Stroke (2 Stroke Engine)
15. Fuel is injected and combusts due to temperature of compressed air
decrease
Forces
Applied Brakes
Third Stroke (Diesel Engine)
16. When the work done by the effort just equals the work done by the load - ______ of the machine will occur
decrease
no movement
Result of Applying a force to a rigid body at rest
Forces
17. Intake of fuel and air mixture - compression of mixture by piston
Law of Conservation of Mass
First Stroke (2 Stroke Engine)
Force Equation
Second Stroke (4 Stroke Engine)
18. Body in motion (car)
Dynamics
Inclined Plane
Work
Hydraulics
19. When a simple machine increases a force it is at the expense of a ____ in the distance the load is moved
Units for Pressure
decrease
First Stroke (Diesel Engine)
Area of a circle equation
20. A combination of components
Force Equation
More than one force
Dimension
System
21. Combustion of fuel mixture ignited by spark plug
Second Stroke (2 Stroke Engine)
Steam Engine
Second Stroke (Diesel Engine)
Force lets us do work on a system
22. 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
Hydrostatics
Temperature
Pascal's Principle
US Customary
23. When the moving fluid is a gas
Steam Engine
Engineers and scientists need a common language
Aerodynamics
System
24. 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
Mechanics describe how forces affect a body
Diesel Engine
Internal Combustion Engine Types
25. A^2+b^2=c^2
Pythagorean Theorem Equation
Third Stroke (Diesel Engine)
Gravity
Direction of Forces
26. Are independent of other dimensions - They are limited in number - length - mass - time - temperature - force
Fourth Stroke (rotary)
Fourth Stroke (4 Stroke Engine)
Base Dimensions
Volume
27. Force x Distance
2 Stroke Engine
Pythagorean Theorem
Derived Dimension
Moment Arm Equation
28. Three- dimensional property measured in units of length times length times length =length x width x height
Pressure
Equilibrium
Volume
Pythagorean Theorem
29. 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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30. A change in velocity over time -Unites: USA- ft/s^2 and SI: m/s^2
Acceleration
Applied Brakes
Power Equation
Moment Arm Equation
31. When the work done by the effort exceeds the work done by the load - the load...
Mechanics
Hydraulic Cylinders
Translation
will move
32. Mass x acceleration
Length
Force Equation
Derived Dimension
Gravity
33. In a right triangle - the sum of the squares of the sides equals the square of the hypotenous
Hydraulic Cylinders
Pythagorean Theorem
Moment Arm
Units for Pressure
34. Can be applied:-By direct contact: push - pull - twist -At a distance: gravity - magnetism Can change: speed - direction - shape - units of force
Newton's Third Law
Forces
Power
Effort
35. Work/force or vertical distance/sloping distance
Equation for Mechanical Advantage regarding inclined planes
Forces and Vectors
Moment Arm
Inclined Plane
36. Piston travels up and both plugs are closed
Second Stroke (4 Stroke Engine)
Mechanics describe how forces affect a body
If the force is applied away from the center of rotation
Force lets us do work on a system
37. Rotation may occur
Statics
Open System
If the force is applied away from the center of rotation
Gravity
38. 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
Drum Brakes
Static
Newton's Second Law
39. Intake of fuel and air mix
Effort
Derived Dimension
First Stroke (rotary)
Power Equation
40. Energy may enter or leave. No mass enters or leaves the system i.e. Closed water bottle - car engine - human
Shear
Torque
Closed System
Static
41. 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
Units
Drum Brakes
Inclined Plane
Rotary
42. 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
Forces and Vectors
Mechanical Engineering
Translation
Power Equation
43. (Force)(Distance)/Seconds
Metrology
Power Equation
Velocity
Newton's First Law of Motion
44. Modern Technology- More efficient-Better Cooling-Easier to service- longer life - lither weight- More expensive
Hydraulics
Statics
Hydraulic Cylinders
Disc Breaks
45. Incompressible (volume doesnt change) Transmit force evenly - Lubricates - Trap contaminants - Some based on vegetable oils - Biodegradable - Aircraft fluids noncombustible (thins as temperature rises)
Shear
Mechanical Advantage
Fluids
Fourth Stroke (Diesel Engine)
46. A movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)
Work
decrease
Rotation
Second Stroke (rotary)
47. A^2+b^2=c^2 - used to calculate vectors
Torque
Hydrodynamics
Mechanical Advantage
Pythagorean Theorem
48. 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
Fourth Stroke (Diesel Engine)
Work
Drum Brakes
System International (SI)
49. Describes a physical property of anything - What we are measuring
Static
System
Dimension
Moment Arm
50. ...
Hybrid Parallel
Effort
Force lets us do work on a system
First Stroke (2 Stroke Engine)