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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. Compression-Tension-Shear
Gravity
Length
Direction of Forces
Effort
2. Both engines drive wheels -ICE used for cruising -Electric motor assists with low speed for acceleration and hill climbing
Surroundings
Hybrid Parallel
Tension
System
3. Mechanics is an application of math that describes how forces affect a body
Hybrid
Disc Breaks
Mechanics
Fourth Stroke (rotary)
4. 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
Tension
Vectors
More than one force
Second Stroke (2 Stroke Engine)
5. Body in motion (car)
Moment Arm Equation
Law of Conservation of Mass
Dynamics
Second Stroke (4 Stroke Engine)
6. 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
Surroundings
no movement
Fluid Power
Hydraulics
7. Piston travels up and exhaust valve opens. Combustion by product exhaustion
more than one force
Fourth Stroke (4 Stroke Engine)
2 Stroke Engine
Third Stroke (4 Stroke Engine)
8. When the sum of all forces and the sum of all moments both equal forces - No movement
Law of Conservation of Mass
Equilibrium
Pressure Equation
First Stroke (Diesel Engine)
9. A flat - two dimensional property -Units of length multiplied by length describe area -A=length x width
Base Dimensions
Hydrostatics
Area
Applied Brakes
10. Derived from - or composed of - base dimensions i.e. Area (length x width) - Weight (mass x acceleration) - velocity (length/time)
Mechanics describe how forces affect a body
Derived Dimension
Force Equation
2 Stroke Engine
11. 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.
Fourth Stroke (rotary)
2 Stroke Engine
Dynamics
Units for Pressure
12. 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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13. (Force)(Distance)/Seconds
Hybrid Series
Drum Brakes
Hydrostatics
Power Equation
14. 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
Couple
Machine
Surroundings
Base Dimensions
15. 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
Hydraulics
Mechanical Engineering
Applied Brakes
Gravity
16. Four Stroke Engine -Used in hotter areas because more efficient -Higher compression ratio than gasoline
Area
Length
Derived Dimension
Diesel Engine
17. When the work done by the effort just equals the work done by the load - ______ of the machine will occur
no movement
Dynamics
Diesel Engine
Dynamics
18. Energy may enter or leave. Mass can enter or leave the system i.e. open water bottle - molecule - hydraulic cylinder - human
US Customary
Forces and Vectors
Open System
Surroundings
19. In a right triangle - the sum of the squares of the sides equals the square of the hypotenous
Law of Conservation of Mass
Pressure
Pythagorean Theorem
Open System
20. 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
Area of a circle equation
Rotary
Direction of Forces
System International (SI)
21. A small piece that makes up a larger whole. Each component is there for a specific job - but the sum of components
Acceleration
2 Stroke Engine
Component
Pythagorean Theorem Equation
22. 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
Conversions
4 Stroke Engine
Second Stroke (4 Stroke Engine)
Newton's Third Law
23. Describes how applied forces bring a body into motion
Second Stroke (Diesel Engine)
Mass
Newton's Third Law
Dynamics
24. Incompressible (volume doesnt change) Transmit force evenly - Lubricates - Trap contaminants - Some based on vegetable oils - Biodegradable - Aircraft fluids noncombustible (thins as temperature rises)
Component
Surroundings
Effort
Fluids
25. Result of gravity acting on mass -The greater the mass - the greater the weight -Is a force -Units: lbs - N
Power
Weight
Fluid
Third Stroke (rotary)
26. 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
Direction of Forces
First Stroke (4 Stroke Engine)
Mechanical Advantage
Force Equation
27. Applied at an angle or parallel to a surface
System
Shear
Internal Combustion Engine Types
Volume
28. Dimensions and units
Pythagorean Theorem Equation
Engineers and scientists need a common language
Second Stroke (rotary)
Hybrid Series
29. In a hydraulic with an incompressible fluid - the total pressure at any point in the system is the same - liquid
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30. Force x Distance
Hydraulic Cylinders
Moment Arm Equation
Third Stroke (rotary)
Moment Arm
31. 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
Vectors
Pressure
Hybrid
Fourth Stroke (Diesel Engine)
32. 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
Work
Statics
Base Dimensions
Pressure Equation
33. Combustion of fuel mixture ignited by spark plug
Second Stroke (2 Stroke Engine)
System
Dimension
Second Stroke (Diesel Engine)
34. Rotation will not occur - but translation might occur
Drum Brakes
Applied Brakes
Static
If the force is applied at the center of the rotation
35. Exhaust
Fourth Stroke (Diesel Engine)
First Stroke (2 Stroke Engine)
Disc Breaks
More than one force
36. When a simple machine increases a force it is at the expense of a ____ in the distance the load is moved
decrease
Second Stroke (rotary)
Temperature
Vectors
37. ...
Diesel Engine
Force lets us do work on a system
Derived Dimension
Force Equation
38. Intake of fuel and air mixture - compression of mixture by piston
Hydrodynamics
First Stroke (2 Stroke Engine)
Common Brake Characteristics
Conversions
39. A combination of components
System
Area Equation
Fourth Stroke (4 Stroke Engine)
Equilibrium
40. Can be applied at a time on an object
Pythagorean Theorem Equation
Pressure
More than one force
Drum Brakes
41. Compression of fuel mix
decrease
Acceleration
Second Stroke (rotary)
Couple
42. Movement along a line (reciprocal or linear motion) -Units: feet and meters
Translation
Newton's Third Law
Work
Second Stroke (2 Stroke Engine)
43. The force simple machines use to do work on a single load or against a single force
Rotation
Effort
Derived Dimension
System
44. Mass can neither by created nor destroyed - only transformed
Volume
Metrology
Law of Conservation of Mass
Units for Pressure
45. Air is compressed - work is done on the system
Third Stroke (Diesel Engine)
Effort
Torque
Second Stroke (Diesel Engine)
46. Air is drawn in
Forces
Open System
First Stroke (Diesel Engine)
Couple
47. What we are not studying
Power Equation
Surroundings
Closed System
Dynamics
48. 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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49. Two stroke- Four Stroke- Diesel-Rotary -Hybrid
Temperature
First Stroke (Diesel Engine)
First Stroke (2 Stroke Engine)
Internal Combustion Engine Types
50. A fluid power system uses hydraulics and a fluid under pressure to create a greater force than is applied
US Customary
Torque
Fluid Power
Equilibrium