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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. Force x Distance
Torque
Vectors
Moment Arm Equation
Derived Dimension
2. Can be applied:-By direct contact: push - pull - twist -At a distance: gravity - magnetism Can change: speed - direction - shape - units of force
Gravity
Dynamics
Forces
Second Stroke (Diesel Engine)
3. Energy may enter or leave. No mass enters or leaves the system i.e. Closed water bottle - car engine - human
Closed System
Mechanics
Common Brake Characteristics
Temperature
4. 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
Compression
Equation for Mechanical Advantage regarding inclined planes
Mechanical Advantage
Applied Brakes
5. Often a free body has _______ acting on it
Mechanics
more than one force
Metrology
System
6. A pull on an object
Work
will move
Tension
If the force is applied at the center of the rotation
7. 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
Static
Mechanics
Law of Conservation of Mass
Mechanical Engineering
8. Four Stroke Engine -Used in hotter areas because more efficient -Higher compression ratio than gasoline
First Stroke (rotary)
Length
Diesel Engine
First Stroke (4 Stroke Engine)
9. Allows comparison between different measuring systems and units - Necessary to market internationally
Equilibrium
Hybrid Parallel
Conversions
Pressure Equation
10. Movement along a line (reciprocal or linear motion) -Units: feet and meters
Mechanics
Translation
Power Equation
Closed System
11. Weight/Time
Force lets us do work on a system
Volume
Closed System
Power Equation
12. A change in velocity over time -Unites: USA- ft/s^2 and SI: m/s^2
Newton's Second Law
Second Stroke (rotary)
Acceleration
Moment Arm Equation
13. 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)
Forces and Vectors
2 Stroke Engine
Power
Open System
14. When fluid is at rest
Volume
Machine
First Stroke (4 Stroke Engine)
Hydrostatics
15. Same pressure - work - volume - Different forces and distances
Pressure
Hybrid Series
Compression
Hydraulic Cylinders
16. Are independent of other dimensions - They are limited in number - length - mass - time - temperature - force
Base Dimensions
Temperature
Rotary
Drum Brakes
17. For every action there is an equal and opposite reaction -Force -F=mg -Earth exerts a force on all of us
18. Combustion of fuel mixture ignited by spark plug
Applied Brakes
Dimension
Fourth Stroke (Diesel Engine)
Second Stroke (2 Stroke Engine)
19. A combination of components
System
Hydrostatics
Work
Applied Brakes
20. Both engines drive wheels -ICE used for cruising -Electric motor assists with low speed for acceleration and hill climbing
Applied Brakes
Dimension
Effort
Hybrid Parallel
21. 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
Hybrid
Fourth Stroke (4 Stroke Engine)
Units
Machine
22. A^2+b^2=c^2 - used to calculate vectors
Tension
System
Pythagorean Theorem
Third Stroke (rotary)
23. Psi - newtons - pascals
Units for Pressure
Hydrostatics
Metrology
decrease
24. Length / Time
Open System
Velocity
Static
If the force is applied away from the center of rotation
25. Dimensions and units
Forces and Vectors
Engineers and scientists need a common language
2 Stroke Engine
Third Stroke (4 Stroke Engine)
26. What we are studying
System
First Stroke (4 Stroke Engine)
Hydrostatics
Newton's Second Law
27. In a hydraulic with an incompressible fluid - the total pressure at any point in the system is the same - liquid
28. When a simple machine increases a force it is at the expense of a ____ in the distance the load is moved
Applied Brakes
US Customary
decrease
Units
29. Exhaust of combustion products
Fourth Stroke (rotary)
Equation for Mechanical Advantage regarding inclined planes
decrease
Power Equation
30. The magnitude of something in a particular direction
Fluids
Area of a circle equation
Pressure Equation
Length
31. When two parallel forces equal in magnitude and opposite direction - i.e. steering wheel - turn a know - turn on and off a faucet
Mechanical Engineering
Pythagorean Theorem
Second Stroke (2 Stroke Engine)
Couple
32. When the work done by the effort just equals the work done by the load - ______ of the machine will occur
no movement
Second Stroke (4 Stroke Engine)
Forces and Vectors
Closed System
33. One that pushes on an object
Second Stroke (4 Stroke Engine)
If the force is applied at the center of the rotation
Shear
Compression
34. The force simple machines use to do work on a single load or against a single force
Moment Arm Equation
Inclined Plane
Fluid
Effort
35. When the sum of all forces and the sum of all moments both equal forces - No movement
Disc Breaks
Units
Equilibrium
Hydrodynamics
36. Length x Width x Height
Base Dimensions
Volume
Fluid
Hybrid Series
37. Intake of fuel and air mix
Dynamics
Second Stroke (4 Stroke Engine)
Power
First Stroke (rotary)
38. Can be reduced by decreasing the weight or force or increasing the area i.e. airbag
Pythagorean Theorem
Mechanics describe how forces affect a body
Pressure
Applied Brakes
39. Force without machine/Force with machine
Third Stroke (rotary)
Temperature
Mechanical Advantage Equation
Fluid Power
40. Energy may enter or leave. Mass can enter or leave the system i.e. open water bottle - molecule - hydraulic cylinder - human
Mechanical Advantage
Open System
Direction of Forces
Forces and Vectors
41. When the moving fluid is a gas
Aerodynamics
Applied Brakes
Pythagorean Theorem
Mechanical Advantage
42. Used to measure or quantify -US Common: Absolute and Gravitational -SI: absolute
Units
Force Equation
Steam Engine
Rotary
43. Force/Area
Third Stroke (Diesel Engine)
Pressure Equation
Engineers and scientists need a common language
System
44. 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
Mechanical Advantage Equation
Translation
System
Mechanical Advantage
45. Exhaust
Applied Brakes
Aerodynamics
Effort
Fourth Stroke (Diesel Engine)
46. (Force)(Distance)/Seconds
Power Equation
Steam Engine
Pythagorean Theorem
Aerodynamics
47. 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
48. Fuel is injected and combusts due to temperature of compressed air
Area Equation
Inclined Plane
Translation
Third Stroke (Diesel Engine)
49. In a right triangle - the sum of the squares of the sides equals the square of the hypotenous
Effort
Pythagorean Theorem
First Stroke (Diesel Engine)
Area Equation
50. Applied at an angle or parallel to a surface
Volume
Mechanical Engineering
Area of a circle equation
Shear