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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. Often a free body has _______ acting on it
Third Stroke (rotary)
Mechanics describe how forces affect a body
more than one force
Pressure Equation
2. Compression-Tension-Shear
Pressure
Direction of Forces
Power
Second Stroke (2 Stroke Engine)
3. Can be applied at a time on an object
Units for Pressure
More than one force
Applied Brakes
System
4. Liquid or gas
Derived Dimension
Fluid
Third Stroke (Diesel Engine)
Pressure Equation
5. Force without machine/Force with machine
Diesel Engine
Mechanical Advantage Equation
First Stroke (2 Stroke Engine)
Force lets us do work on a system
6. An indication of kinetic energy of mass at the molecular level
Applied Brakes
4 Stroke Engine
Temperature
Law of Conservation of Mass
7. Mass x acceleration
Temperature
Open System
Shear
Force Equation
8. Can be applied:-By direct contact: push - pull - twist -At a distance: gravity - magnetism Can change: speed - direction - shape - units of force
Forces
Moment Arm
Units for Pressure
Equilibrium
9. Incompressible (volume doesnt change) Transmit force evenly - Lubricates - Trap contaminants - Some based on vegetable oils - Biodegradable - Aircraft fluids noncombustible (thins as temperature rises)
Pythagorean Theorem
First Stroke (rotary)
Fluids
Fourth Stroke (Diesel Engine)
10. ...
Weight
Force lets us do work on a system
Dimension
More than one force
11. The force simple machines use to do work on a single load or against a single force
Effort
Power Equation
Force lets us do work on a system
Engineers and scientists need a common language
12. Two stroke- Four Stroke- Diesel-Rotary -Hybrid
Rotary
Internal Combustion Engine Types
Pythagorean Theorem
Area of a circle equation
13. 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
Open System
Acceleration
Component
US Customary
14. Mass can neither by created nor destroyed - only transformed
Direction of Forces
US Customary
Law of Conservation of Mass
Temperature
15. In a right triangle - the sum of the squares of the sides equals the square of the hypotenous
Fluids
Pythagorean Theorem
Aerodynamics
Newton's First Law of Motion
16. 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
Pressure Equation
Dimension
Work
Mass
17. Piston travels up and exhaust valve opens. Combustion by product exhaustion
Fourth Stroke (4 Stroke Engine)
Internal Combustion Engine Types
System
First Stroke (2 Stroke Engine)
18. Movement along a line (reciprocal or linear motion) -Units: feet and meters
Drum Brakes
Units for Pressure
Dimension
Translation
19. 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
Length
Second Stroke (2 Stroke Engine)
Metrology
Machine
20. Combustion ignited by spark plug and materials are compressed
no movement
Third Stroke (4 Stroke Engine)
Velocity
Hydraulics
21. A^2+b^2=c^2
Couple
2 Stroke Engine
If the force is applied away from the center of rotation
Pythagorean Theorem Equation
22. 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
Mechanical Engineering
Applied Brakes
Equilibrium
Hydraulics
23. Intake of fuel and air mixture - compression of mixture by piston
Gravity
Work
Velocity
First Stroke (2 Stroke Engine)
24. 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
Common Brake Characteristics
Vectors
Second Stroke (2 Stroke Engine)
Equilibrium
25. A pull on an object
Units
Common Brake Characteristics
Pascal's Principle
Tension
26. Piston travels up and both plugs are closed
Power Equation
Mechanical Advantage
Acceleration
Second Stroke (4 Stroke Engine)
27. If a force causes rotations -Vector- Machines can have more than one torque-Units: foot- pound and newton - meter - i.e. engines - airplanes - propeller
4 Stroke Engine
Torque
Closed System
Translation
28. Same pressure - work - volume - Different forces and distances
Acceleration
Second Stroke (rotary)
Hydrodynamics
Hydraulic Cylinders
29. For every action there is an equal and opposite reaction -Force -F=mg -Earth exerts a force on all of us
30. Varies by location (on earth) - distance (from earth) - and mass (of planet)
Volume
Mechanics
Gravity
Steam Engine
31. Rotation may occur
Hydraulic Cylinders
Area
decrease
If the force is applied away from the center of rotation
32. Four Stroke Engine -Used in hotter areas because more efficient -Higher compression ratio than gasoline
Translation
Hydraulics
Moment Arm Equation
Diesel Engine
33. (Force)(Distance)/Seconds
Power Equation
Newton's First Law of Motion
Base Dimensions
Hybrid Parallel
34. Force x Distance
Moment Arm Equation
Second Stroke (2 Stroke Engine)
Force Equation
Base Dimensions
35. Length x Width x Height
Hydraulics
Volume
Hydrodynamics
Closed System
36. Piston travels down and intake valve is opened. Intake of fuel and air into chamber
Velocity
Hybrid Parallel
Equilibrium
First Stroke (4 Stroke Engine)
37. When two parallel forces equal in magnitude and opposite direction - i.e. steering wheel - turn a know - turn on and off a faucet
If the force is applied away from the center of rotation
Drum Brakes
Length
Couple
38. What we are not studying
Surroundings
Derived Dimension
System International (SI)
Diesel Engine
39. A flat - sloping surface -The only simple machine that does not move -The force is applied to the ramp - since this is the direction the load weight is moved -Sloping side is longer than vertical side -Less force is required to accomplish the same am
Velocity
US Customary
Power Equation
Inclined Plane
40. Ignition - power stroke
Third Stroke (rotary)
Compression
Rotary
Area Equation
41. A fluid power system uses hydraulics and a fluid under pressure to create a greater force than is applied
Moment Arm Equation
Fluid Power
Static
Fluids
42. Body in motion (car)
Dynamics
Hybrid
Applied Brakes
Internal Combustion Engine Types
43. 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
Velocity
Hybrid
Forces and Vectors
Dynamics
44. The branch of science and engineering involving measurement
Metrology
Units for Pressure
Units
Mechanical Engineering
45. Derived from - or composed of - base dimensions i.e. Area (length x width) - Weight (mass x acceleration) - velocity (length/time)
Fluid Power
Mass
Derived Dimension
Second Stroke (rotary)
46. Body at rest or is in equilibrium (wall)
Law of Conservation of Mass
Static
First Stroke (2 Stroke Engine)
Power Equation
47. ICE generates electricity for electric battery -Electric motor turns wheels
Units
Hybrid Series
Metrology
Volume
48. 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
Newton's First Law of Motion
Rotary
Moment Arm Equation
Drum Brakes
49. (pi) x (radius)^2
Area of a circle equation
Force Equation
Second Stroke (Diesel Engine)
More than one force
50. Translation (slide) -Rotate -Slide and Rotate Together
Units for Pressure
Result of Applying a force to a rigid body at rest
Units
4 Stroke Engine