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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. 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
Power Equation
Mechanical Advantage Equation
Weight
Machine
2. Mass x acceleration
Hydraulic Cylinders
Force Equation
Mechanics
Component
3. 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
Dynamics
Hybrid
more than one force
Fluid
4. Static - Dynamic
Rotation
Mechanics describe how forces affect a body
Shear
Dimension
5. Three- dimensional property measured in units of length times length times length =length x width x height
Volume
Fluid Power
Component
Law of Conservation of Mass
6. Rotation will not occur - but translation might occur
Mechanical Engineering
Equation for Mechanical Advantage regarding inclined planes
Static
If the force is applied at the center of the rotation
7. Same pressure - work - volume - Different forces and distances
Units
Dimension
Power Equation
Hydraulic Cylinders
8. The amount of atoms and molecules in something - Matter is energy that has become solid -An object gains mass when it gains more energy and vice a versa -Units: SI- kgs and USA: Slugs - lbs
Mass
System International (SI)
Forces and Vectors
Torque
9. Can be applied at a time on an object
Fluid Power
Conversions
More than one force
Hydrodynamics
10. (pi) x (radius)^2
Area of a circle equation
Pythagorean Theorem
Effort
Force lets us do work on a system
11. 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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12. 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
Compression
Newton's Second Law
Work
2 Stroke Engine
13. In a right triangle - the sum of the squares of the sides equals the square of the hypotenous
Mechanics
Velocity
Machine
Pythagorean Theorem
14. Dimensions and units
Torque
Engineers and scientists need a common language
Metrology
Second Stroke (4 Stroke Engine)
15. 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
Moment Arm Equation
Area
Common Brake Characteristics
First Stroke (rotary)
16. A combination of components
More than one force
System
Mechanics
Work
17. Varies by location (on earth) - distance (from earth) - and mass (of planet)
Gravity
will move
Pressure
Fourth Stroke (Diesel Engine)
18. When the moving fluid is a gas
System
Power Equation
Dimension
Aerodynamics
19. What we are studying
Machine
System
Vectors
Second Stroke (rotary)
20. Every object continues in motion in a straight line unless acted upon by some force -Every object at rest continues at rest unless acted upon by a force -So forces cause a change in an object's state of motion
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21. Modern Technology- More efficient-Better Cooling-Easier to service- longer life - lither weight- More expensive
Disc Breaks
Effort
Metrology
Fluid
22. A^2+b^2=c^2 - used to calculate vectors
4 Stroke Engine
decrease
Pythagorean Theorem
Disc Breaks
23. When the sum of all forces and the sum of all moments both equal forces - No movement
Equilibrium
Second Stroke (rotary)
Second Stroke (4 Stroke Engine)
Fourth Stroke (Diesel Engine)
24. Describes how applied forces bring a body into rest or equilibrium
Pressure Equation
Hydraulic Cylinders
Statics
Second Stroke (Diesel Engine)
25. Force without machine/Force with machine
Rotary
Mechanical Advantage Equation
Aerodynamics
Fourth Stroke (Diesel Engine)
26. Work/force or vertical distance/sloping distance
Equation for Mechanical Advantage regarding inclined planes
Mechanics
System
Work
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
Newton's First Law of Motion
Units for Pressure
Torque
Newton's Third Law
28. A pull on an object
Fluid
Tension
Mechanical Advantage Equation
System
29. A fluid power system uses hydraulics and a fluid under pressure to create a greater force than is applied
Hydraulics
Fluid Power
Shear
Common Brake Characteristics
30. Weight/Time
Rotary
Result of Applying a force to a rigid body at rest
Power Equation
more than one force
31. Energy may enter or leave. No mass enters or leaves the system i.e. Closed water bottle - car engine - human
Closed System
Fluids
Newton's First Law of Motion
Area Equation
32. Compression-Tension-Shear
Direction of Forces
Static
Effort
Fourth Stroke (Diesel Engine)
33. Force x Distance
Moment Arm Equation
Translation
Tension
Component
34. The magnitude of something in a particular direction
Gravity
Rotary
Length
Second Stroke (4 Stroke Engine)
35. Air is compressed - work is done on the system
Steam Engine
Second Stroke (Diesel Engine)
First Stroke (4 Stroke Engine)
Law of Conservation of Mass
36. ICE generates electricity for electric battery -Electric motor turns wheels
First Stroke (2 Stroke Engine)
Hybrid Series
Internal Combustion Engine Types
Pythagorean Theorem
37. Psi - newtons - pascals
Steam Engine
Engineers and scientists need a common language
Acceleration
Units for Pressure
38. 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
Second Stroke (Diesel Engine)
Metrology
More than one force
39. Derived from - or composed of - base dimensions i.e. Area (length x width) - Weight (mass x acceleration) - velocity (length/time)
Newton's First Law of Motion
Rotary
Gravity
Derived Dimension
40. Length x Width x Height
Second Stroke (2 Stroke Engine)
Newton's First Law of Motion
Conversions
Volume
41. Describes a physical property of anything - What we are measuring
Dimension
Aerodynamics
Mechanics describe how forces affect a body
4 Stroke Engine
42. An indication of kinetic energy of mass at the molecular level
Temperature
Torque
Statics
Second Stroke (4 Stroke Engine)
43. 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
Mechanical Engineering
Equilibrium
Fourth Stroke (4 Stroke Engine)
Volume
44. 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
Rotary
System International (SI)
Conversions
Force Equation
45. Piston travels up and exhaust valve opens. Combustion by product exhaustion
Static
Fourth Stroke (4 Stroke Engine)
Dynamics
Hydrostatics
46. Used to measure or quantify -US Common: Absolute and Gravitational -SI: absolute
First Stroke (rotary)
Units
Pythagorean Theorem Equation
Conversions
47. The force simple machines use to do work on a single load or against a single force
Second Stroke (4 Stroke Engine)
Derived Dimension
Hydraulic Cylinders
Effort
48. ...
Derived Dimension
Equation for Mechanical Advantage regarding inclined planes
Force lets us do work on a system
Rotary
49. 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
Area
Applied Brakes
Force Equation
Second Stroke (4 Stroke Engine)
50. When a simple machine increases a force it is at the expense of a ____ in the distance the load is moved
Effort
Mechanics
Mass
decrease