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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. 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
Vectors
Mechanical Advantage
Work
First Stroke (4 Stroke Engine)
2. One that pushes on an object
Forces and Vectors
Common Brake Characteristics
Power Equation
Compression
3. An indication of kinetic energy of mass at the molecular level
Inclined Plane
Temperature
Equilibrium
Units for Pressure
4. Old technology- harder to service-Still used on big trucks and trailers because they are too expensive to convert
Length
Metrology
Drum Brakes
Pythagorean Theorem
5. 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
Aerodynamics
Moment Arm Equation
Applied Brakes
6. Ignition - power stroke
First Stroke (4 Stroke Engine)
First Stroke (rotary)
Third Stroke (rotary)
Equation for Mechanical Advantage regarding inclined planes
7. What we are studying
Surroundings
System
Second Stroke (4 Stroke Engine)
Newton's Third Law
8. Translation (slide) -Rotate -Slide and Rotate Together
Direction of Forces
Mechanical Advantage
no movement
Result of Applying a force to a rigid body at rest
9. 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
Drum Brakes
If the force is applied at the center of the rotation
Machine
Gravity
10. Modern Technology- More efficient-Better Cooling-Easier to service- longer life - lither weight- More expensive
Second Stroke (rotary)
Hybrid Series
Pascal's Principle
Disc Breaks
11. A^2+b^2=c^2
Newton's First Law of Motion
Mechanical Advantage Equation
Pythagorean Theorem Equation
Couple
12. Result of gravity acting on mass -The greater the mass - the greater the weight -Is a force -Units: lbs - N
Weight
will move
Hydrostatics
If the force is applied away from the center of rotation
13. 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
Inclined Plane
Pascal's Principle
Power
Mechanical Engineering
14. When the work done by the effort just equals the work done by the load - ______ of the machine will occur
Second Stroke (2 Stroke Engine)
Fourth Stroke (4 Stroke Engine)
no movement
Gravity
15. 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
System
Mass
Force lets us do work on a system
Applied Brakes
16. When a simple machine increases a force it is at the expense of a ____ in the distance the load is moved
decrease
Hydrodynamics
US Customary
Units
17. 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
Hydrostatics
Internal Combustion Engine Types
Tension
Inclined Plane
18. For every action there is an equal and opposite reaction -Force -F=mg -Earth exerts a force on all of us
19. Intake of fuel and air mix
2 Stroke Engine
First Stroke (rotary)
If the force is applied away from the center of rotation
Common Brake Characteristics
20. Mechanics is an application of math that describes how forces affect a body
Torque
Result of Applying a force to a rigid body at rest
Fluid
Mechanics
21. 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.
Couple
System
2 Stroke Engine
Rotary
22. Mass x acceleration
Area Equation
Area
Force Equation
Third Stroke (rotary)
23. Force without machine/Force with machine
Mechanical Advantage
If the force is applied away from the center of rotation
Couple
Mechanical Advantage Equation
24. External Combustion engine -Only used in factories and plants (not used in cars)
Fourth Stroke (rotary)
4 Stroke Engine
Effort
Steam Engine
25. The force simple machines use to do work on a single load or against a single force
Effort
Base Dimensions
Open System
Power Equation
26. What we are not studying
Surroundings
Units for Pressure
Rotation
Machine
27. Force x Distance
Moment Arm Equation
Result of Applying a force to a rigid body at rest
Acceleration
Third Stroke (Diesel Engine)
28. 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
Component
US Customary
Rotation
Second Stroke (Diesel Engine)
29. Length x Width
Statics
Force lets us do work on a system
Area Equation
Pythagorean Theorem
30. When the work done by the effort exceeds the work done by the load - the load...
Third Stroke (rotary)
will move
Rotation
Machine
31. Mass can neither by created nor destroyed - only transformed
Power Equation
Law of Conservation of Mass
Temperature
2 Stroke Engine
32. Are independent of other dimensions - They are limited in number - length - mass - time - temperature - force
decrease
Newton's Third Law
Base Dimensions
Machine
33. When two parallel forces equal in magnitude and opposite direction - i.e. steering wheel - turn a know - turn on and off a faucet
First Stroke (Diesel Engine)
Dynamics
First Stroke (2 Stroke Engine)
Couple
34. The branch of science and engineering involving measurement
Hybrid Parallel
Metrology
Rotation
Vectors
35. 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
Common Brake Characteristics
Couple
Fluids
Mechanical Advantage Equation
36. Same pressure - work - volume - Different forces and distances
more than one force
Hydraulics
Law of Conservation of Mass
Hydraulic Cylinders
37. When fluid is at rest
Common Brake Characteristics
Metrology
Forces and Vectors
Hydrostatics
38. Used in cars -2 rotations of crankshaft -4 strokes (down - up - down - up) of piston - i.e. cars - trucks - planes - buses - motorcycles - submarine -1% of gas actually moves people
Mechanical Advantage Equation
Mass
Gravity
4 Stroke Engine
39. Work/force or vertical distance/sloping distance
Newton's Second Law
Hydraulic Cylinders
Equation for Mechanical Advantage regarding inclined planes
Rotary
40. Describes a physical property of anything - What we are measuring
Dimension
Compression
Effort
Disc Breaks
41. A small piece that makes up a larger whole. Each component is there for a specific job - but the sum of components
Moment Arm
Hydrodynamics
Metrology
Component
42. Three- dimensional property measured in units of length times length times length =length x width x height
Volume
Pascal's Principle
Force Equation
Area
43. When the moving fluid is a gas
Statics
System
Pressure
Aerodynamics
44. Body at rest or is in equilibrium (wall)
Units for Pressure
Rotation
First Stroke (Diesel Engine)
Static
45. A change in velocity over time -Unites: USA- ft/s^2 and SI: m/s^2
Acceleration
Pressure Equation
Mechanics describe how forces affect a body
Forces and Vectors
46. Air is compressed - work is done on the system
Third Stroke (rotary)
Torque
Units
Second Stroke (Diesel Engine)
47. Two stroke- Four Stroke- Diesel-Rotary -Hybrid
Internal Combustion Engine Types
First Stroke (Diesel Engine)
Mechanical Advantage
Hybrid
48. Body in motion (car)
Second Stroke (rotary)
will move
Moment Arm Equation
Dynamics
49. 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
Hybrid Series
Mechanics describe how forces affect a body
Hydraulics
Moment Arm
50. Can be applied at a time on an object
Hybrid Series
decrease
Pressure
More than one force