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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. 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
Second Stroke (4 Stroke Engine)
Couple
Work
more than one force
2. ICE generates electricity for electric battery -Electric motor turns wheels
Force lets us do work on a system
Dimension
Hybrid Series
Fourth Stroke (rotary)
3. Describes how applied forces bring a body into motion
Dynamics
Moment Arm Equation
Area of a circle equation
Inclined Plane
4. Mechanics is an application of math that describes how forces affect a body
If the force is applied at the center of the rotation
Gravity
Pascal's Principle
Mechanics
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
Fluid
Area of a circle equation
Gravity
Common Brake Characteristics
6. A pull on an object
Tension
Pythagorean Theorem
Fluids
Closed System
7. Fuel is injected and combusts due to temperature of compressed air
Weight
Third Stroke (Diesel Engine)
Mechanical Advantage
Fluid Power
8. A small piece that makes up a larger whole. Each component is there for a specific job - but the sum of components
Fluid
Component
Mass
Mechanical Advantage
9. Incompressible (volume doesnt change) Transmit force evenly - Lubricates - Trap contaminants - Some based on vegetable oils - Biodegradable - Aircraft fluids noncombustible (thins as temperature rises)
Fluids
Power Equation
Effort
Power
10. When the work done by the effort just equals the work done by the load - ______ of the machine will occur
Hydrodynamics
Newton's Second Law
no movement
Metrology
11. A movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)
Pythagorean Theorem Equation
Power
Second Stroke (rotary)
Rotation
12. A change in velocity over time -Unites: USA- ft/s^2 and SI: m/s^2
Power Equation
Translation
More than one force
Acceleration
13. 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)
Machine
Diesel Engine
Closed System
14. (Force)(Distance)/Seconds
Derived Dimension
Power
Power Equation
Vectors
15. Length x Width x Height
Fluid Power
Pressure Equation
Volume
Fluid
16. 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
Velocity
Mechanical Advantage Equation
US Customary
Machine
17. Energy may enter or leave. No mass enters or leaves the system i.e. Closed water bottle - car engine - human
Length
Closed System
Hybrid
Fourth Stroke (4 Stroke Engine)
18. What we are not studying
Direction of Forces
Surroundings
Internal Combustion Engine Types
Second Stroke (2 Stroke Engine)
19. 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
If the force is applied at the center of the rotation
Applied Brakes
Metrology
Gravity
20. Exhaust of combustion products
First Stroke (2 Stroke Engine)
Fourth Stroke (rotary)
Fluid
Mechanics
21. Used to measure or quantify -US Common: Absolute and Gravitational -SI: absolute
Open System
Velocity
Units
First Stroke (4 Stroke Engine)
22. Force/Area
Pressure
Power Equation
Pascal's Principle
Pressure Equation
23. Length x Width
Hybrid Parallel
Mechanical Engineering
Effort
Area Equation
24. Describes how applied forces bring a body into rest or equilibrium
Open System
Statics
Shear
Power
25. When two parallel forces equal in magnitude and opposite direction - i.e. steering wheel - turn a know - turn on and off a faucet
Pythagorean Theorem
Hybrid
More than one force
Couple
26. Can be applied at a time on an object
Engineers and scientists need a common language
Forces
Metrology
More than one force
27. 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
First Stroke (Diesel Engine)
US Customary
Force lets us do work on a system
Fourth Stroke (Diesel Engine)
28. Both engines drive wheels -ICE used for cruising -Electric motor assists with low speed for acceleration and hill climbing
more than one force
System International (SI)
Hybrid Parallel
Mechanical Advantage
29. Modern Technology- More efficient-Better Cooling-Easier to service- longer life - lither weight- More expensive
Third Stroke (rotary)
Disc Breaks
Hydrostatics
Acceleration
30. 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
Second Stroke (rotary)
If the force is applied away from the center of rotation
Mechanical Engineering
Second Stroke (4 Stroke Engine)
31. If a force causes rotations -Vector- Machines can have more than one torque-Units: foot- pound and newton - meter - i.e. engines - airplanes - propeller
Equation for Mechanical Advantage regarding inclined planes
Fourth Stroke (Diesel Engine)
Moment Arm
Torque
32. When the sum of all forces and the sum of all moments both equal forces - No movement
Mechanics
Forces and Vectors
Weight
Equilibrium
33. A fluid power system uses hydraulics and a fluid under pressure to create a greater force than is applied
Compression
Applied Brakes
Mechanical Advantage Equation
Fluid Power
34. Movement along a line (reciprocal or linear motion) -Units: feet and meters
Power
Second Stroke (4 Stroke Engine)
Forces and Vectors
Translation
35. Energy may enter or leave. Mass can enter or leave the system i.e. open water bottle - molecule - hydraulic cylinder - human
Area
Mechanical Engineering
Open System
Weight
36. Can be applied:-By direct contact: push - pull - twist -At a distance: gravity - magnetism Can change: speed - direction - shape - units of force
Forces
Work
Machine
Area
37. Force without machine/Force with machine
Power
Result of Applying a force to a rigid body at rest
Pascal's Principle
Mechanical Advantage Equation
38. Piston travels up and both plugs are closed
Second Stroke (4 Stroke Engine)
Forces
Statics
Component
39. 1. Magnitude: size - a numberi.e. 50 mph 2. Direction: angle i.e. N -E -W -S
Forces and Vectors
Fourth Stroke (rotary)
Diesel Engine
Hydraulics
40. A flat - two dimensional property -Units of length multiplied by length describe area -A=length x width
Area
Hydraulics
Pythagorean Theorem Equation
Length
41. Rotation will not occur - but translation might occur
decrease
4 Stroke Engine
If the force is applied at the center of the rotation
Mechanical Advantage Equation
42. 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)
Power
Third Stroke (4 Stroke Engine)
Second Stroke (Diesel Engine)
Mechanical Engineering
43. External Combustion engine -Only used in factories and plants (not used in cars)
Mass
System International (SI)
Steam Engine
Conversions
44. Piston travels up and exhaust valve opens. Combustion by product exhaustion
Moment Arm Equation
Gravity
Weight
Fourth Stroke (4 Stroke Engine)
45. Ignition - power stroke
Mechanical Advantage
Law of Conservation of Mass
Fourth Stroke (4 Stroke Engine)
Third Stroke (rotary)
46. Combustion of fuel mixture ignited by spark plug
Second Stroke (Diesel Engine)
Second Stroke (2 Stroke Engine)
Mechanical Advantage
Closed System
47. 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
Mass
Area of a circle equation
Inclined Plane
US Customary
48. 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
Hydraulics
Pythagorean Theorem
Third Stroke (4 Stroke Engine)
Vectors
49. Four Stroke Engine -Used in hotter areas because more efficient -Higher compression ratio than gasoline
Velocity
Third Stroke (4 Stroke Engine)
Second Stroke (rotary)
Diesel Engine
50. Weight/Time
Power Equation
Fourth Stroke (rotary)
Pressure
Units for Pressure