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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. 1. Magnitude: size - a numberi.e. 50 mph 2. Direction: angle i.e. N -E -W -S
Compression
Forces and Vectors
Power Equation
Internal Combustion Engine Types
2. 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
Closed System
Power
US Customary
System
3. Result of gravity acting on mass -The greater the mass - the greater the weight -Is a force -Units: lbs - N
First Stroke (rotary)
Internal Combustion Engine Types
Weight
Hydrostatics
4. When the work done by the effort just equals the work done by the load - ______ of the machine will occur
Rotary
Forces and Vectors
no movement
Derived Dimension
5. 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
Second Stroke (rotary)
If the force is applied at the center of the rotation
Machine
Hydraulic Cylinders
6. Used to measure or quantify -US Common: Absolute and Gravitational -SI: absolute
System
Closed System
Volume
Units
7. Are independent of other dimensions - They are limited in number - length - mass - time - temperature - force
Base Dimensions
First Stroke (4 Stroke Engine)
Rotation
Dimension
8. Two stroke- Four Stroke- Diesel-Rotary -Hybrid
Drum Brakes
Internal Combustion Engine Types
Dynamics
System
9. In a hydraulic with an incompressible fluid - the total pressure at any point in the system is the same - liquid
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10. A change in velocity over time -Unites: USA- ft/s^2 and SI: m/s^2
Inclined Plane
Applied Brakes
Acceleration
Pressure
11. Air is drawn in
Metrology
Closed System
First Stroke (Diesel Engine)
Machine
12. Liquid or gas
Applied Brakes
System International (SI)
Acceleration
Fluid
13. Causes acceleration -Units: USA: 32.2 ft/s^2 SI: 9.8 m/sec^2
Gravity
Work
Temperature
Static
14. Compression-Tension-Shear
Rotation
Force lets us do work on a system
Force Equation
Direction of Forces
15. 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
Surroundings
Hybrid Parallel
Area Equation
Mechanical Advantage
16. Ignition - power stroke
Tension
Pressure Equation
If the force is applied away from the center of rotation
Third Stroke (rotary)
17. Can be reduced by decreasing the weight or force or increasing the area i.e. airbag
More than one force
Component
Newton's Second Law
Pressure
18. 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
more than one force
Work
2 Stroke Engine
Force Equation
19. Mass x acceleration
Drum Brakes
Second Stroke (2 Stroke Engine)
Force Equation
Surroundings
20. Brake pedal and linkage - Master Cylinder - Wheel cylinders (4) - Hydraulic lines - Hydraulic fluid - Mechanical advantage is provided by the foot pedal to the booster (level) - A greater force is applied on the wheel cylinders than on the brake peda
Common Brake Characteristics
Metrology
Applied Brakes
Direction of Forces
21. A combination of components
Conversions
First Stroke (4 Stroke Engine)
System
Law of Conservation of Mass
22. When the fluid is in motion
Pressure Equation
Hydrodynamics
Third Stroke (Diesel Engine)
Hydraulics
23. 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
Law of Conservation of Mass
Weight
Mechanical Engineering
Mechanical Advantage Equation
24. Exhaust of combustion products
Second Stroke (2 Stroke Engine)
Velocity
Fourth Stroke (rotary)
Couple
25. A flat - two dimensional property -Units of length multiplied by length describe area -A=length x width
Pythagorean Theorem
Fourth Stroke (4 Stroke Engine)
Equation for Mechanical Advantage regarding inclined planes
Area
26. A fluid power system uses hydraulics and a fluid under pressure to create a greater force than is applied
Hydraulics
Fluid Power
Volume
Dynamics
27. 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
Units
Pythagorean Theorem Equation
Hydraulics
Third Stroke (rotary)
28. A^2+b^2=c^2
Power Equation
Dynamics
Pythagorean Theorem Equation
Law of Conservation of Mass
29. A small piece that makes up a larger whole. Each component is there for a specific job - but the sum of components
Third Stroke (4 Stroke Engine)
Hydraulics
Component
Area Equation
30. Piston travels up and both plugs are closed
Inclined Plane
decrease
Second Stroke (4 Stroke Engine)
Component
31. Translation (slide) -Rotate -Slide and Rotate Together
If the force is applied away from the center of rotation
Result of Applying a force to a rigid body at rest
Mechanical Engineering
System International (SI)
32. A^2+b^2=c^2 - used to calculate vectors
Fluids
Steam Engine
Pythagorean Theorem
more than one force
33. If a force causes rotations -Vector- Machines can have more than one torque-Units: foot- pound and newton - meter - i.e. engines - airplanes - propeller
more than one force
Power Equation
Mass
Torque
34. The force simple machines use to do work on a single load or against a single force
Mechanical Engineering
Common Brake Characteristics
Engineers and scientists need a common language
Effort
35. Piston travels up and exhaust valve opens. Combustion by product exhaustion
Fourth Stroke (4 Stroke Engine)
More than one force
Volume
Area of a circle equation
36. Force x Distance
Metrology
Equilibrium
Moment Arm Equation
Dynamics
37. Air is compressed - work is done on the system
Fourth Stroke (Diesel Engine)
Weight
Fourth Stroke (rotary)
Second Stroke (Diesel Engine)
38. When the sum of all forces and the sum of all moments both equal forces - No movement
Moment Arm Equation
Units for Pressure
Equilibrium
Force lets us do work on a system
39. Body in motion (car)
2 Stroke Engine
Hydrodynamics
Dynamics
Power
40. (Force)(Distance)/Seconds
Power Equation
Forces
Torque
Area of a circle equation
41. Can be applied:-By direct contact: push - pull - twist -At a distance: gravity - magnetism Can change: speed - direction - shape - units of force
Forces
Inclined Plane
Hybrid Parallel
4 Stroke Engine
42. When the moving fluid is a gas
Aerodynamics
Area of a circle equation
First Stroke (2 Stroke Engine)
Hydraulics
43. Incompressible (volume doesnt change) Transmit force evenly - Lubricates - Trap contaminants - Some based on vegetable oils - Biodegradable - Aircraft fluids noncombustible (thins as temperature rises)
Fluids
Units
Rotary
Moment Arm Equation
44. Both engines drive wheels -ICE used for cruising -Electric motor assists with low speed for acceleration and hill climbing
Rotation
Hybrid Parallel
Dynamics
Direction of Forces
45. Fuel is injected and combusts due to temperature of compressed air
Third Stroke (Diesel Engine)
Component
Machine
Forces
46. Weight/Time
If the force is applied away from the center of rotation
Pythagorean Theorem
Newton's Third Law
Power Equation
47. (pi) x (radius)^2
Vectors
Drum Brakes
Area of a circle equation
Forces
48. Four Stroke Engine -Used in hotter areas because more efficient -Higher compression ratio than gasoline
Diesel Engine
Direction of Forces
Compression
System International (SI)
49. Intake of fuel and air mixture - compression of mixture by piston
Torque
2 Stroke Engine
First Stroke (2 Stroke Engine)
Second Stroke (Diesel Engine)
50. 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 (
Pressure
Pythagorean Theorem
System International (SI)
Closed System