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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 movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)
Rotation
First Stroke (rotary)
US Customary
decrease
2. Movement along a line (reciprocal or linear motion) -Units: feet and meters
Closed System
Translation
will move
Length
3. An indication of kinetic energy of mass at the molecular level
Temperature
Mechanics describe how forces affect a body
First Stroke (2 Stroke Engine)
Length
4. When the work done by the effort just equals the work done by the load - ______ of the machine will occur
Vectors
Pressure Equation
no movement
Hydrodynamics
5. The magnitude of something in a particular direction
Length
Dynamics
Drum Brakes
System
6. The branch of science and engineering involving measurement
Metrology
Fluid Power
Machine
Second Stroke (Diesel Engine)
7. Air is drawn in
First Stroke (Diesel Engine)
Newton's Third Law
Mechanical Advantage
Law of Conservation of Mass
8. Air is compressed - work is done on the system
Rotation
Weight
Moment Arm Equation
Second Stroke (Diesel Engine)
9. Force x Distance
4 Stroke Engine
US Customary
Moment Arm Equation
Rotary
10. Three- dimensional property measured in units of length times length times length =length x width x height
Volume
Hydrostatics
Units for Pressure
First Stroke (2 Stroke Engine)
11. Two stroke- Four Stroke- Diesel-Rotary -Hybrid
Internal Combustion Engine Types
First Stroke (4 Stroke Engine)
Area Equation
Moment Arm
12. What we are not studying
Inclined Plane
Surroundings
US Customary
Power Equation
13. 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
Closed System
Common Brake Characteristics
Result of Applying a force to a rigid body at rest
Temperature
14. Applied at an angle or parallel to a surface
US Customary
Area
Shear
Open System
15. Mechanics is an application of math that describes how forces affect a body
Applied Brakes
Mechanics
Hydrostatics
Direction of Forces
16. Combustion of fuel mixture ignited by spark plug
System International (SI)
Effort
Second Stroke (2 Stroke Engine)
Fourth Stroke (4 Stroke Engine)
17. Liquid or gas
Fluid
Result of Applying a force to a rigid body at rest
Gravity
Area
18. Static - Dynamic
Mechanics describe how forces affect a body
Steam Engine
Applied Brakes
System International (SI)
19. 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)
Dimension
Moment Arm Equation
Dynamics
Power
20. In a hydraulic with an incompressible fluid - the total pressure at any point in the system is the same - liquid
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21. A^2+b^2=c^2 - used to calculate vectors
Closed System
Fluids
Pythagorean Theorem
First Stroke (Diesel Engine)
22. (Force)(Distance)/Seconds
Power Equation
Fourth Stroke (Diesel Engine)
More than one force
Steam Engine
23. Fuel is injected and combusts due to temperature of compressed air
Power Equation
Drum Brakes
Third Stroke (Diesel Engine)
Rotary
24. Exhaust of combustion products
First Stroke (4 Stroke Engine)
Acceleration
Pressure
Fourth Stroke (rotary)
25. What we are studying
Hydrostatics
Hydraulic Cylinders
Compression
System
26. 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
Shear
System
Mass
Force Equation
27. 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)
Diesel Engine
Surroundings
4 Stroke Engine
28. Force/Area
Force lets us do work on a system
If the force is applied at the center of the rotation
Newton's First Law of Motion
Pressure Equation
29. 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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30. Psi - newtons - pascals
Mechanical Advantage
Vectors
Dynamics
Units for Pressure
31. Used to measure or quantify -US Common: Absolute and Gravitational -SI: absolute
Units
Law of Conservation of Mass
System
Mechanics describe how forces affect a body
32. Derived from - or composed of - base dimensions i.e. Area (length x width) - Weight (mass x acceleration) - velocity (length/time)
Units
Derived Dimension
More than one force
Shear
33. A pull on an object
Tension
System International (SI)
Second Stroke (4 Stroke Engine)
Moment Arm
34. Rotation may occur
Mechanics
Statics
Force lets us do work on a system
If the force is applied away from the center of rotation
35. In a right triangle - the sum of the squares of the sides equals the square of the hypotenous
Third Stroke (4 Stroke Engine)
Power
System International (SI)
Pythagorean Theorem
36. 1. Magnitude: size - a numberi.e. 50 mph 2. Direction: angle i.e. N -E -W -S
Gravity
Closed System
Forces and Vectors
Forces
37. Both engines drive wheels -ICE used for cruising -Electric motor assists with low speed for acceleration and hill climbing
Hybrid Parallel
Applied Brakes
Pressure Equation
Fluid Power
38. 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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39. ...
Acceleration
Force lets us do work on a system
Tension
Newton's Third Law
40. 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
US Customary
System International (SI)
Length
Mechanical Engineering
41. Can be applied at a time on an object
Pascal's Principle
Hybrid Series
More than one force
Newton's Second Law
42. Result of gravity acting on mass -The greater the mass - the greater the weight -Is a force -Units: lbs - N
Newton's Second Law
Weight
Open System
decrease
43. Intake of fuel and air mixture - compression of mixture by piston
Disc Breaks
Metrology
Base Dimensions
First Stroke (2 Stroke Engine)
44. Piston travels up and exhaust valve opens. Combustion by product exhaustion
Fourth Stroke (Diesel Engine)
Fourth Stroke (4 Stroke Engine)
If the force is applied away from the center of rotation
Pressure
45. Energy may enter or leave. Mass can enter or leave the system i.e. open water bottle - molecule - hydraulic cylinder - human
Gravity
more than one force
Newton's Second Law
Open System
46. A fluid power system uses hydraulics and a fluid under pressure to create a greater force than is applied
Third Stroke (rotary)
Drum Brakes
Fluid Power
Base Dimensions
47. A flat - two dimensional property -Units of length multiplied by length describe area -A=length x width
Area
Fluids
Second Stroke (Diesel Engine)
Pascal's Principle
48. Four Stroke Engine -Used in hotter areas because more efficient -Higher compression ratio than gasoline
Diesel Engine
Derived Dimension
Fourth Stroke (Diesel Engine)
Units
49. Old technology- harder to service-Still used on big trucks and trailers because they are too expensive to convert
First Stroke (2 Stroke Engine)
System
Drum Brakes
Temperature
50. When the fluid is in motion
Rotation
Hydrodynamics
Area Equation
If the force is applied away from the center of rotation