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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. Allows comparison between different measuring systems and units - Necessary to market internationally
Effort
Couple
Conversions
First Stroke (4 Stroke Engine)
2. Same pressure - work - volume - Different forces and distances
Fourth Stroke (4 Stroke Engine)
Dimension
Hydraulic Cylinders
Second Stroke (2 Stroke Engine)
3. A^2+b^2=c^2 - used to calculate vectors
Equilibrium
more than one force
Pythagorean Theorem
Statics
4. A flat - two dimensional property -Units of length multiplied by length describe area -A=length x width
Statics
Weight
Area
Metrology
5. Psi - newtons - pascals
Volume
Dimension
Units for Pressure
Acceleration
6. Air is compressed - work is done on the system
Length
Second Stroke (Diesel Engine)
Hydraulic Cylinders
Moment Arm Equation
7. 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)
Mechanical Advantage Equation
Pythagorean Theorem
Hydrostatics
8. Movement along a line (reciprocal or linear motion) -Units: feet and meters
Translation
Surroundings
4 Stroke Engine
Newton's Second Law
9. 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
Tension
Equilibrium
Work
Direction of Forces
10. Body in motion (car)
more than one force
Compression
Effort
Dynamics
11. Can be applied:-By direct contact: push - pull - twist -At a distance: gravity - magnetism Can change: speed - direction - shape - units of force
Hybrid Parallel
First Stroke (rotary)
Open System
Forces
12. The force simple machines use to do work on a single load or against a single force
Effort
Pressure Equation
First Stroke (2 Stroke Engine)
Temperature
13. One that pushes on an object
Compression
Moment Arm Equation
Common Brake Characteristics
Derived Dimension
14. Varies by location (on earth) - distance (from earth) - and mass (of planet)
Area of a circle equation
Gravity
US Customary
If the force is applied at the center of the rotation
15. Force/Area
Pressure
First Stroke (rotary)
Pressure Equation
Newton's Third Law
16. 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.
Newton's First Law of Motion
2 Stroke Engine
Effort
If the force is applied at the center of the rotation
17. External Combustion engine -Only used in factories and plants (not used in cars)
Fourth Stroke (rotary)
Steam Engine
Disc Breaks
Shear
18. Modern Technology- More efficient-Better Cooling-Easier to service- longer life - lither weight- More expensive
Disc Breaks
Mass
More than one force
Couple
19. Body at rest or is in equilibrium (wall)
Static
Fourth Stroke (rotary)
Internal Combustion Engine Types
Moment Arm Equation
20. Force x Distance
Mass
First Stroke (rotary)
Moment Arm Equation
Third Stroke (rotary)
21. Both engines drive wheels -ICE used for cruising -Electric motor assists with low speed for acceleration and hill climbing
Diesel Engine
Dimension
Internal Combustion Engine Types
Hybrid Parallel
22. Force without machine/Force with machine
Power
Machine
Hybrid
Mechanical Advantage Equation
23. Piston travels up and both plugs are closed
Second Stroke (4 Stroke Engine)
Component
First Stroke (4 Stroke Engine)
Diesel Engine
24. Compression-Tension-Shear
Direction of Forces
Velocity
Second Stroke (Diesel Engine)
Area of a circle equation
25. ICE generates electricity for electric battery -Electric motor turns wheels
Component
Power
Hybrid Series
Effort
26. (Force)(Distance)/Seconds
Newton's Second Law
no movement
Mechanical Advantage Equation
Power Equation
27. Ignition - power stroke
Third Stroke (Diesel Engine)
Third Stroke (rotary)
Statics
Rotary
28. Energy may enter or leave. No mass enters or leaves the system i.e. Closed water bottle - car engine - human
Torque
Third Stroke (rotary)
Second Stroke (4 Stroke Engine)
Closed System
29. In a right triangle - the sum of the squares of the sides equals the square of the hypotenous
Conversions
Pythagorean Theorem
Pythagorean Theorem Equation
Area of a circle equation
30. Used to measure or quantify -US Common: Absolute and Gravitational -SI: absolute
Temperature
Units
Drum Brakes
Engineers and scientists need a common language
31. Causes acceleration -Units: USA: 32.2 ft/s^2 SI: 9.8 m/sec^2
Newton's Second Law
Translation
Conversions
Gravity
32. When the sum of all forces and the sum of all moments both equal forces - No movement
Result of Applying a force to a rigid body at rest
Internal Combustion Engine Types
Equilibrium
Derived Dimension
33. What we are studying
Force lets us do work on a system
System International (SI)
System
no movement
34. A movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)
Mechanics describe how forces affect a body
Area Equation
Rotation
Mechanical Engineering
35. A fluid power system uses hydraulics and a fluid under pressure to create a greater force than is applied
Hydrostatics
Weight
Shear
Fluid Power
36. 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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37. A small piece that makes up a larger whole. Each component is there for a specific job - but the sum of components
Newton's Second Law
Component
Fourth Stroke (rotary)
Fluid Power
38. Two stroke- Four Stroke- Diesel-Rotary -Hybrid
Internal Combustion Engine Types
Second Stroke (Diesel Engine)
Area
will move
39. 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
Length
First Stroke (rotary)
Third Stroke (rotary)
40. Describes how applied forces bring a body into motion
decrease
Dynamics
Moment Arm Equation
Pressure
41. Mass x acceleration
Force Equation
Second Stroke (rotary)
Third Stroke (Diesel Engine)
Pressure
42. The perpendicular distance from the pivot point to the point of application of the force (d) - M=Fd -Clockwise=Negative moment -Counterclockwise=Positive moment
First Stroke (2 Stroke Engine)
Fluid
Moment Arm
Diesel Engine
43. Four Stroke Engine -Used in hotter areas because more efficient -Higher compression ratio than gasoline
Diesel Engine
Forces and Vectors
no movement
Third Stroke (rotary)
44. 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
Third Stroke (4 Stroke Engine)
Velocity
Area
Machine
45. 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
Force Equation
Volume
Rotary
Engineers and scientists need a common language
46. Mechanics is an application of math that describes how forces affect a body
Equation for Mechanical Advantage regarding inclined planes
Force lets us do work on a system
Mechanics
Compression
47. Often a free body has _______ acting on it
Hybrid
Mechanical Advantage Equation
Effort
more than one force
48. Exhaust
Open System
more than one force
Fourth Stroke (Diesel Engine)
Forces
49. Air is drawn in
Mechanics
First Stroke (Diesel Engine)
Acceleration
First Stroke (rotary)
50. An application of Pascal's Principle (trading distance and force while doing the same amount of work) -Gives a mechanical advantage -The muscles of machines - used to produce very large forces - use a fluid under pressure (gas is low pressure and liq
no movement
Hydraulics
Work
Drum Brakes