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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. 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
Hydraulic Cylinders
Tension
Common Brake Characteristics
Fourth Stroke (Diesel Engine)
2. In a hydraulic with an incompressible fluid - the total pressure at any point in the system is the same - liquid
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3. 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
Inclined Plane
Units for Pressure
Result of Applying a force to a rigid body at rest
Mechanical Advantage
4. 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
Torque
Vectors
Fourth Stroke (rotary)
Newton's Second Law
5. Mass x acceleration
First Stroke (2 Stroke Engine)
Diesel Engine
more than one force
Force Equation
6. Movement along a line (reciprocal or linear motion) -Units: feet and meters
Hybrid
Force lets us do work on a system
Translation
Power Equation
7. 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
Statics
Pascal's Principle
Work
Shear
8. Air is compressed - work is done on the system
Second Stroke (Diesel Engine)
Fluids
Pythagorean Theorem
US Customary
9. What we are not studying
Surroundings
Power Equation
4 Stroke Engine
more than one force
10. The magnitude of something in a particular direction
Third Stroke (rotary)
Component
Base Dimensions
Length
11. Modern Technology- More efficient-Better Cooling-Easier to service- longer life - lither weight- More expensive
US Customary
Pressure Equation
Area
Disc Breaks
12. When the fluid is in motion
Base Dimensions
Pythagorean Theorem
Hydrodynamics
2 Stroke Engine
13. One that pushes on an object
2 Stroke Engine
Pythagorean Theorem
Compression
Base Dimensions
14. Describes how applied forces bring a body into rest or equilibrium
Static
Second Stroke (Diesel Engine)
Power Equation
Statics
15. Two stroke- Four Stroke- Diesel-Rotary -Hybrid
Drum Brakes
Fluids
Internal Combustion Engine Types
Equilibrium
16. Air is drawn in
Fluid
First Stroke (Diesel Engine)
Units
Derived Dimension
17. Force/Area
US Customary
Forces
Pressure Equation
Third Stroke (4 Stroke Engine)
18. Can be applied at a time on an object
Volume
More than one force
First Stroke (4 Stroke Engine)
Hydraulics
19. Causes acceleration -Units: USA: 32.2 ft/s^2 SI: 9.8 m/sec^2
Area Equation
System International (SI)
Gravity
Aerodynamics
20. Energy may enter or leave. No mass enters or leaves the system i.e. Closed water bottle - car engine - human
Forces
Common Brake Characteristics
Closed System
Second Stroke (rotary)
21. Exhaust
Fourth Stroke (Diesel Engine)
US Customary
Hybrid
Moment Arm
22. Liquid or gas
4 Stroke Engine
Fluid
Second Stroke (Diesel Engine)
Hybrid Parallel
23. A pull on an object
Moment Arm Equation
Tension
Open System
Mechanics describe how forces affect a body
24. ...
Newton's Third Law
Force lets us do work on a system
Dynamics
Newton's Second Law
25. A fluid power system uses hydraulics and a fluid under pressure to create a greater force than is applied
Pythagorean Theorem Equation
Static
Hybrid Parallel
Fluid Power
26. Length / Time
Mechanical Advantage Equation
Mechanics
Velocity
Second Stroke (4 Stroke Engine)
27. Rotation may occur
Derived Dimension
more than one force
Aerodynamics
If the force is applied away from the center of rotation
28. Same pressure - work - volume - Different forces and distances
Open System
more than one force
Hydraulic Cylinders
Third Stroke (rotary)
29. A^2+b^2=c^2
Fluids
Rotation
Volume
Pythagorean Theorem Equation
30. Describes how applied forces bring a body into motion
Dynamics
First Stroke (Diesel Engine)
First Stroke (4 Stroke Engine)
Hybrid
31. The branch of science and engineering involving measurement
Area
Law of Conservation of Mass
Metrology
System International (SI)
32. Result of gravity acting on mass -The greater the mass - the greater the weight -Is a force -Units: lbs - N
Weight
Translation
First Stroke (2 Stroke Engine)
Conversions
33. Translation (slide) -Rotate -Slide and Rotate Together
Third Stroke (Diesel Engine)
Result of Applying a force to a rigid body at rest
Second Stroke (Diesel Engine)
Pressure
34. Piston travels down and intake valve is opened. Intake of fuel and air into chamber
Dynamics
Forces and Vectors
Fluids
First Stroke (4 Stroke Engine)
35. A movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)
Machine
Hybrid
Rotation
Power Equation
36. When fluid is at rest
US Customary
Effort
Dynamics
Hydrostatics
37. Combustion of fuel mixture ignited by spark plug
Applied Brakes
Second Stroke (2 Stroke Engine)
Power
Law of Conservation of Mass
38. Both engines drive wheels -ICE used for cruising -Electric motor assists with low speed for acceleration and hill climbing
Drum Brakes
Hydrodynamics
Hybrid Parallel
Second Stroke (Diesel Engine)
39. A^2+b^2=c^2 - used to calculate vectors
Forces and Vectors
Metrology
Tension
Pythagorean Theorem
40. 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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41. 1. Magnitude: size - a numberi.e. 50 mph 2. Direction: angle i.e. N -E -W -S
Derived Dimension
Dynamics
Machine
Forces and Vectors
42. Weight/Time
4 Stroke Engine
Power Equation
Hydrodynamics
Statics
43. 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 (
Dynamics
System International (SI)
Second Stroke (rotary)
Equilibrium
44. Body in motion (car)
Static
Power
Area
Dynamics
45. 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.
2 Stroke Engine
Equation for Mechanical Advantage regarding inclined planes
Diesel Engine
US Customary
46. 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
Fluids
Fourth Stroke (Diesel Engine)
Translation
Applied Brakes
47. Incompressible (volume doesnt change) Transmit force evenly - Lubricates - Trap contaminants - Some based on vegetable oils - Biodegradable - Aircraft fluids noncombustible (thins as temperature rises)
Closed System
Hybrid Series
Fluids
Applied Brakes
48. The force simple machines use to do work on a single load or against a single force
Effort
Base Dimensions
Direction of Forces
Third Stroke (rotary)
49. External Combustion engine -Only used in factories and plants (not used in cars)
Steam Engine
If the force is applied away from the center of rotation
Weight
Second Stroke (rotary)
50. 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)
Pressure
More than one force
Units
Power