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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. Air is compressed - work is done on the system
Length
Second Stroke (Diesel Engine)
Third Stroke (rotary)
Steam Engine
2. Used to measure or quantify -US Common: Absolute and Gravitational -SI: absolute
Hydraulic Cylinders
Power
Units
Second Stroke (rotary)
3. Static - Dynamic
Equilibrium
Mechanics describe how forces affect a body
Metrology
Law of Conservation of Mass
4. 1. Magnitude: size - a numberi.e. 50 mph 2. Direction: angle i.e. N -E -W -S
Temperature
First Stroke (2 Stroke Engine)
Forces and Vectors
Hydraulics
5. 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
Third Stroke (4 Stroke Engine)
Dynamics
Mechanical Engineering
Common Brake Characteristics
6. 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
System International (SI)
US Customary
Fluid
Closed System
7. A flat - two dimensional property -Units of length multiplied by length describe area -A=length x width
System
Vectors
Hydraulics
Area
8. A pull on an object
US Customary
Hybrid Parallel
Tension
Fluid Power
9. 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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10. A^2+b^2=c^2 - used to calculate vectors
Pythagorean Theorem
Common Brake Characteristics
Work
decrease
11. Incompressible (volume doesnt change) Transmit force evenly - Lubricates - Trap contaminants - Some based on vegetable oils - Biodegradable - Aircraft fluids noncombustible (thins as temperature rises)
Surroundings
Fluid
Fluids
Machine
12. Describes a physical property of anything - What we are measuring
Newton's Third Law
Fluid
Dimension
Dynamics
13. Force x Distance
Conversions
Machine
Dynamics
Moment Arm Equation
14. Exhaust of combustion products
Fourth Stroke (rotary)
Velocity
Component
Rotation
15. Can be applied at a time on an object
Law of Conservation of Mass
More than one force
Third Stroke (rotary)
Steam Engine
16. When a simple machine increases a force it is at the expense of a ____ in the distance the load is moved
decrease
Third Stroke (4 Stroke Engine)
First Stroke (4 Stroke Engine)
Second Stroke (rotary)
17. Air is drawn in
First Stroke (Diesel Engine)
Force Equation
Pressure Equation
Pressure
18. One that pushes on an object
Fluid
decrease
Compression
Diesel Engine
19. The force simple machines use to do work on a single load or against a single force
Second Stroke (4 Stroke Engine)
First Stroke (2 Stroke Engine)
Effort
Fourth Stroke (4 Stroke Engine)
20. Length x Width x Height
Mechanical Engineering
Couple
Volume
System
21. Describes how applied forces bring a body into rest or equilibrium
Fourth Stroke (4 Stroke Engine)
Fourth Stroke (Diesel Engine)
Statics
US Customary
22. Mass can neither by created nor destroyed - only transformed
Third Stroke (Diesel Engine)
Law of Conservation of Mass
Base Dimensions
System International (SI)
23. When the sum of all forces and the sum of all moments both equal forces - No movement
Hydraulic Cylinders
will move
Hybrid Parallel
Equilibrium
24. Length / Time
Drum Brakes
Torque
Hydraulic Cylinders
Velocity
25. 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 Third Law
2 Stroke Engine
Temperature
Mechanical Engineering
26. Rotation will not occur - but translation might occur
will move
more than one force
First Stroke (Diesel Engine)
If the force is applied at the center of the rotation
27. Allows comparison between different measuring systems and units - Necessary to market internationally
Pressure
Conversions
Pythagorean Theorem Equation
Temperature
28. 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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29. When the work done by the effort just equals the work done by the load - ______ of the machine will occur
Second Stroke (rotary)
Law of Conservation of Mass
no movement
Equation for Mechanical Advantage regarding inclined planes
30. What we are studying
Mechanics describe how forces affect a body
Mechanical Advantage Equation
System
Area
31. In a right triangle - the sum of the squares of the sides equals the square of the hypotenous
Static
Pythagorean Theorem
Mechanical Engineering
Vectors
32. Work/force or vertical distance/sloping distance
Volume
Aerodynamics
Equation for Mechanical Advantage regarding inclined planes
Base Dimensions
33. Compression-Tension-Shear
Equation for Mechanical Advantage regarding inclined planes
Fluids
Direction of Forces
Mechanical Advantage
34. Liquid or gas
Fluid
Vectors
First Stroke (4 Stroke Engine)
Mechanics
35. Piston travels up and exhaust valve opens. Combustion by product exhaustion
Conversions
Hybrid Series
Mechanics describe how forces affect a body
Fourth Stroke (4 Stroke Engine)
36. 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
Applied Brakes
Drum Brakes
Rotation
Mechanical Advantage
37. Body in motion (car)
Hybrid Parallel
Newton's First Law of Motion
Dynamics
Power Equation
38. The magnitude of something in a particular direction
Mechanical Advantage Equation
decrease
Fourth Stroke (rotary)
Length
39. 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 (
Engineers and scientists need a common language
Effort
System International (SI)
Fluid
40. Modern Technology- More efficient-Better Cooling-Easier to service- longer life - lither weight- More expensive
Compression
Fourth Stroke (rotary)
Disc Breaks
Third Stroke (Diesel Engine)
41. Can be applied:-By direct contact: push - pull - twist -At a distance: gravity - magnetism Can change: speed - direction - shape - units of force
Translation
Volume
Forces
Rotary
42. Energy may enter or leave. Mass can enter or leave the system i.e. open water bottle - molecule - hydraulic cylinder - human
more than one force
Open System
Length
Volume
43. The perpendicular distance from the pivot point to the point of application of the force (d) - M=Fd -Clockwise=Negative moment -Counterclockwise=Positive moment
Newton's First Law of Motion
Moment Arm
Second Stroke (2 Stroke Engine)
Translation
44. (Force)(Distance)/Seconds
Mechanical Advantage Equation
Power Equation
First Stroke (4 Stroke Engine)
Pressure
45. A^2+b^2=c^2
Hydraulics
Length
Hybrid Parallel
Pythagorean Theorem Equation
46. 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
Mass
Closed System
Units
Pythagorean Theorem Equation
47. Movement along a line (reciprocal or linear motion) -Units: feet and meters
Dynamics
First Stroke (rotary)
If the force is applied away from the center of rotation
Translation
48. Are independent of other dimensions - They are limited in number - length - mass - time - temperature - force
Base Dimensions
Pressure Equation
Torque
Area Equation
49. Often a free body has _______ acting on it
Drum Brakes
Mechanics describe how forces affect a body
Hybrid Series
more than one force
50. 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
Fourth Stroke (rotary)
Mechanical Engineering
will move
Hybrid
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