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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. Exhaust of combustion products
Hybrid
If the force is applied away from the center of rotation
Aerodynamics
Fourth Stroke (rotary)
2. 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
Applied Brakes
Hydraulic Cylinders
Power
3. Can be applied:-By direct contact: push - pull - twist -At a distance: gravity - magnetism Can change: speed - direction - shape - units of force
Equilibrium
Forces
Units
Second Stroke (rotary)
4. Mechanics is an application of math that describes how forces affect a body
Mechanics
First Stroke (Diesel Engine)
Inclined Plane
Hydrodynamics
5. When fluid is at rest
Hydrostatics
Gravity
If the force is applied at the center of the rotation
System International (SI)
6. Movement along a line (reciprocal or linear motion) -Units: feet and meters
Translation
Hydraulic Cylinders
Pythagorean Theorem Equation
Mass
7. Energy may enter or leave. Mass can enter or leave the system i.e. open water bottle - molecule - hydraulic cylinder - human
Vectors
System International (SI)
Power
Open System
8. Often a free body has _______ acting on it
more than one force
Translation
Newton's Second Law
Open System
9. Length x Width x Height
First Stroke (rotary)
Tension
Mass
Volume
10. 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
Dimension
Machine
Fourth Stroke (Diesel Engine)
Units for Pressure
11. A flat - two dimensional property -Units of length multiplied by length describe area -A=length x width
Area
Fourth Stroke (4 Stroke Engine)
Metrology
Compression
12. Force x Distance
Vectors
Moment Arm Equation
Machine
Second Stroke (Diesel Engine)
13. Ignition - power stroke
Third Stroke (rotary)
Hydrostatics
Engineers and scientists need a common language
Closed System
14. Mass can neither by created nor destroyed - only transformed
Law of Conservation of Mass
First Stroke (2 Stroke Engine)
Pythagorean Theorem
Hydrostatics
15. 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
Equation for Mechanical Advantage regarding inclined planes
Pressure
System
16. 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
Temperature
System International (SI)
Hydraulics
Derived Dimension
17. 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
Effort
Units
US Customary
Inclined Plane
18. When the moving fluid is a gas
Forces
Engineers and scientists need a common language
Aerodynamics
Tension
19. Static - Dynamic
US Customary
Mechanics describe how forces affect a body
Area
Torque
20. Psi - newtons - pascals
Third Stroke (4 Stroke Engine)
Units for Pressure
Conversions
Aerodynamics
21. Piston travels down and intake valve is opened. Intake of fuel and air into chamber
Hydraulics
First Stroke (4 Stroke Engine)
Disc Breaks
Fluids
22. When the work done by the effort exceeds the work done by the load - the load...
US Customary
Common Brake Characteristics
will move
Area
23. Rotation will not occur - but translation might occur
Newton's Second Law
First Stroke (4 Stroke Engine)
If the force is applied at the center of the rotation
Temperature
24. When the fluid is in motion
Hydrodynamics
Length
First Stroke (Diesel Engine)
Steam Engine
25. Compression-Tension-Shear
Newton's Third Law
Gravity
Direction of Forces
More than one force
26. ICE generates electricity for electric battery -Electric motor turns wheels
Area of a circle equation
Second Stroke (Diesel Engine)
Hybrid Series
System International (SI)
27. Can be reduced by decreasing the weight or force or increasing the area i.e. airbag
Pythagorean Theorem
Power Equation
Pressure
Force lets us do work on a system
28. 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
Vectors
Gravity
Area of a circle equation
more than one force
29. A combination of components
Direction of Forces
System
First Stroke (4 Stroke Engine)
Weight
30. Length / Time
Velocity
Third Stroke (4 Stroke Engine)
Dimension
Component
31. Derived from - or composed of - base dimensions i.e. Area (length x width) - Weight (mass x acceleration) - velocity (length/time)
Hydrodynamics
4 Stroke Engine
Derived Dimension
Area Equation
32. 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
Power
Statics
Length
Mechanical Engineering
33. 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
Mechanics describe how forces affect a body
Moment Arm Equation
Units for Pressure
34. (pi) x (radius)^2
Force lets us do work on a system
Area of a circle equation
Applied Brakes
Forces and Vectors
35. If a force causes rotations -Vector- Machines can have more than one torque-Units: foot- pound and newton - meter - i.e. engines - airplanes - propeller
Torque
Conversions
Moment Arm
Gravity
36. The magnitude of something in a particular direction
Effort
Fourth Stroke (rotary)
Metrology
Length
37. A pull on an object
Machine
Tension
no movement
Mechanical Advantage Equation
38. A fluid power system uses hydraulics and a fluid under pressure to create a greater force than is applied
Fluid Power
Forces
Mass
Fourth Stroke (rotary)
39. A change in velocity over time -Unites: USA- ft/s^2 and SI: m/s^2
Surroundings
Second Stroke (rotary)
Acceleration
Pressure Equation
40. When the work done by the effort just equals the work done by the load - ______ of the machine will occur
Aerodynamics
Newton's Second Law
no movement
Fluid Power
41. The perpendicular distance from the pivot point to the point of application of the force (d) - M=Fd -Clockwise=Negative moment -Counterclockwise=Positive moment
Statics
Moment Arm
If the force is applied at the center of the rotation
Hybrid
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
Second Stroke (2 Stroke Engine)
Length
System
43. A^2+b^2=c^2
Pythagorean Theorem Equation
Effort
Torque
First Stroke (rotary)
44. One that pushes on an object
Compression
Surroundings
Mechanical Advantage Equation
Work
45. Rotation may occur
If the force is applied away from the center of rotation
Applied Brakes
Hybrid Parallel
Surroundings
46. 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
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47. Both engines drive wheels -ICE used for cruising -Electric motor assists with low speed for acceleration and hill climbing
Hybrid Parallel
Power
Statics
Third Stroke (4 Stroke Engine)
48. Translation (slide) -Rotate -Slide and Rotate Together
Direction of Forces
Result of Applying a force to a rigid body at rest
Machine
Hydrodynamics
49. Combustion of fuel mixture ignited by spark plug
Moment Arm Equation
Mechanical Engineering
Second Stroke (2 Stroke Engine)
System International (SI)
50. Length x Width
Steam Engine
Mechanical Advantage
Area Equation
Area of a circle equation