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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. One that pushes on an object
Power Equation
Compression
Units
Acceleration
2. When two parallel forces equal in magnitude and opposite direction - i.e. steering wheel - turn a know - turn on and off a faucet
Rotary
Acceleration
Second Stroke (Diesel Engine)
Couple
3. In a hydraulic with an incompressible fluid - the total pressure at any point in the system is the same - liquid
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4. Rotation will not occur - but translation might occur
If the force is applied at the center of the rotation
Vectors
Mechanical Advantage Equation
Couple
5. Length x Width x Height
Derived Dimension
Volume
will move
Force Equation
6. (pi) x (radius)^2
Mechanical Engineering
Area of a circle equation
Mechanical Advantage Equation
Inclined Plane
7. A movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)
If the force is applied away from the center of rotation
Velocity
Compression
Rotation
8. A pull on an object
Tension
Newton's First Law of Motion
Gravity
Conversions
9. (Force)(Distance)/Seconds
no movement
Power Equation
Fourth Stroke (rotary)
Internal Combustion Engine Types
10. Describes how applied forces bring a body into rest or equilibrium
2 Stroke Engine
Statics
Force lets us do work on a system
Rotary
11. Weight/Time
Pressure
Third Stroke (Diesel Engine)
Power Equation
Diesel Engine
12. The magnitude of something in a particular direction
Surroundings
Third Stroke (rotary)
Dynamics
Length
13. When fluid is at rest
If the force is applied at the center of the rotation
Hydrostatics
Hydraulics
Second Stroke (rotary)
14. When the work done by the effort just equals the work done by the load - ______ of the machine will occur
no movement
US Customary
Torque
Velocity
15. Translation (slide) -Rotate -Slide and Rotate Together
Result of Applying a force to a rigid body at rest
Shear
First Stroke (4 Stroke Engine)
Tension
16. 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
Surroundings
Hybrid Series
Vectors
Statics
17. 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
Conversions
Component
Hybrid
System
18. 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 (
Component
System International (SI)
Volume
Hybrid
19. 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
Hybrid
Area of a circle equation
Pythagorean Theorem Equation
4 Stroke Engine
20. When the sum of all forces and the sum of all moments both equal forces - No movement
Engineers and scientists need a common language
Equilibrium
Fluids
Hybrid Series
21. Causes acceleration -Units: USA: 32.2 ft/s^2 SI: 9.8 m/sec^2
Gravity
Fluids
Pythagorean Theorem Equation
Fluid
22. Intake of fuel and air mix
Static
Third Stroke (rotary)
First Stroke (rotary)
System
23. Piston travels down and intake valve is opened. Intake of fuel and air into chamber
First Stroke (4 Stroke Engine)
Moment Arm
Second Stroke (rotary)
Equation for Mechanical Advantage regarding inclined planes
24. Liquid or gas
Fluid
decrease
Metrology
Derived Dimension
25. Can be reduced by decreasing the weight or force or increasing the area i.e. airbag
Result of Applying a force to a rigid body at rest
Pressure
Second Stroke (Diesel Engine)
Second Stroke (2 Stroke Engine)
26. Piston travels up and exhaust valve opens. Combustion by product exhaustion
Fourth Stroke (4 Stroke Engine)
Hybrid Parallel
Third Stroke (rotary)
Second Stroke (2 Stroke Engine)
27. Old technology- harder to service-Still used on big trucks and trailers because they are too expensive to convert
Drum Brakes
Torque
Gravity
Dynamics
28. 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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29. What we are studying
Third Stroke (rotary)
Hydrodynamics
Forces and Vectors
System
30. Psi - newtons - pascals
Statics
Units for Pressure
more than one force
First Stroke (rotary)
31. A combination of components
System
Equilibrium
Component
Third Stroke (4 Stroke Engine)
32. Air is drawn in
Applied Brakes
First Stroke (Diesel Engine)
Mechanics describe how forces affect a body
Equilibrium
33. Force/Area
Pressure
First Stroke (4 Stroke Engine)
Pythagorean Theorem
Pressure Equation
34. A change in velocity over time -Unites: USA- ft/s^2 and SI: m/s^2
Length
Hydrostatics
Compression
Acceleration
35. Movement along a line (reciprocal or linear motion) -Units: feet and meters
Statics
Translation
decrease
Length
36. Result of gravity acting on mass -The greater the mass - the greater the weight -Is a force -Units: lbs - N
Newton's Second Law
Moment Arm
Weight
Metrology
37. A^2+b^2=c^2
Area of a circle equation
Compression
Mass
Pythagorean Theorem Equation
38. What we are not studying
Fluid Power
Surroundings
Fluid
Result of Applying a force to a rigid body at rest
39. 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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40. 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
Aerodynamics
Common Brake Characteristics
Forces and Vectors
Third Stroke (rotary)
41. If a force causes rotations -Vector- Machines can have more than one torque-Units: foot- pound and newton - meter - i.e. engines - airplanes - propeller
Fluid
Hydrodynamics
Power Equation
Torque
42. 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.
Temperature
2 Stroke Engine
Base Dimensions
Shear
43. Compression-Tension-Shear
Aerodynamics
Fluids
Power Equation
Direction of Forces
44. Exhaust
Third Stroke (rotary)
Fourth Stroke (Diesel Engine)
First Stroke (2 Stroke Engine)
Power Equation
45. Applied at an angle or parallel to a surface
Shear
Weight
First Stroke (Diesel Engine)
no movement
46. Used to measure or quantify -US Common: Absolute and Gravitational -SI: absolute
Fluids
Units
US Customary
Third Stroke (Diesel Engine)
47. Intake of fuel and air mixture - compression of mixture by piston
Volume
Effort
First Stroke (2 Stroke Engine)
Static
48. Dimensions and units
Steam Engine
Engineers and scientists need a common language
Mass
Static
49. Derived from - or composed of - base dimensions i.e. Area (length x width) - Weight (mass x acceleration) - velocity (length/time)
Area of a circle equation
Area
First Stroke (2 Stroke Engine)
Derived Dimension
50. The force simple machines use to do work on a single load or against a single force
Base Dimensions
Fluid
Effort
Gravity