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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. Result of gravity acting on mass -The greater the mass - the greater the weight -Is a force -Units: lbs - N
Weight
Fourth Stroke (Diesel Engine)
Force Equation
Volume
2. Combustion of fuel mixture ignited by spark plug
Second Stroke (2 Stroke Engine)
Power Equation
Area
System
3. Air is drawn in
More than one force
Hydraulics
First Stroke (Diesel Engine)
Forces and Vectors
4. What we are not studying
Surroundings
Engineers and scientists need a common language
Fourth Stroke (rotary)
Velocity
5. Are independent of other dimensions - They are limited in number - length - mass - time - temperature - force
Machine
2 Stroke Engine
Base Dimensions
Newton's Second Law
6. Can be applied at a time on an object
More than one force
2 Stroke Engine
Weight
Second Stroke (2 Stroke Engine)
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
Work
Power
Power Equation
Machine
8. When fluid is at rest
Diesel Engine
Work
Internal Combustion Engine Types
Hydrostatics
9. The branch of science and engineering involving measurement
2 Stroke Engine
Shear
Units for Pressure
Metrology
10. Can be reduced by decreasing the weight or force or increasing the area i.e. airbag
Pressure
Second Stroke (4 Stroke Engine)
System
Newton's First Law of Motion
11. 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
Machine
Inclined Plane
will move
Shear
12. 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
Couple
Vectors
Mass
Fourth Stroke (4 Stroke Engine)
13. Intake of fuel and air mix
First Stroke (rotary)
Hybrid
Static
Hybrid Parallel
14. Exhaust of combustion products
Newton's Third Law
Pressure
Fourth Stroke (rotary)
Volume
15. 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
Direction of Forces
Open System
Closed System
16. A combination of components
System
Mechanics
Couple
Translation
17. (Force)(Distance)/Seconds
Power Equation
Fourth Stroke (Diesel Engine)
4 Stroke Engine
Fluids
18. Exhaust
Surroundings
Pythagorean Theorem
Power Equation
Fourth Stroke (Diesel Engine)
19. 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.
Power Equation
Moment Arm
2 Stroke Engine
Common Brake Characteristics
20. Describes how applied forces bring a body into motion
Dynamics
More than one force
Result of Applying a force to a rigid body at rest
First Stroke (Diesel Engine)
21. Incompressible (volume doesnt change) Transmit force evenly - Lubricates - Trap contaminants - Some based on vegetable oils - Biodegradable - Aircraft fluids noncombustible (thins as temperature rises)
Common Brake Characteristics
Fluids
Volume
Diesel Engine
22. Fuel is injected and combusts due to temperature of compressed air
Power Equation
Weight
Disc Breaks
Third Stroke (Diesel Engine)
23. Two stroke- Four Stroke- Diesel-Rotary -Hybrid
Mechanics describe how forces affect a body
Internal Combustion Engine Types
Hybrid Series
First Stroke (2 Stroke Engine)
24. Energy may enter or leave. No mass enters or leaves the system i.e. Closed water bottle - car engine - human
Dynamics
Hydraulic Cylinders
Closed System
Law of Conservation of Mass
25. A small piece that makes up a larger whole. Each component is there for a specific job - but the sum of components
Applied Brakes
Component
Moment Arm Equation
Pythagorean Theorem
26. Applied at an angle or parallel to a surface
2 Stroke Engine
Hydrodynamics
Shear
Second Stroke (rotary)
27. Piston travels down and intake valve is opened. Intake of fuel and air into chamber
Pascal's Principle
First Stroke (4 Stroke Engine)
Fourth Stroke (rotary)
Dynamics
28. In a right triangle - the sum of the squares of the sides equals the square of the hypotenous
Acceleration
Weight
Pythagorean Theorem
Units for Pressure
29. ICE generates electricity for electric battery -Electric motor turns wheels
Hybrid Series
Newton's First Law of Motion
Couple
Static
30. Air is compressed - work is done on the system
Second Stroke (Diesel Engine)
Rotary
Hydrostatics
Result of Applying a force to a rigid body at rest
31. Rotation will not occur - but translation might occur
If the force is applied at the center of the rotation
Newton's Second Law
Static
Conversions
32. 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
Aerodynamics
4 Stroke Engine
Diesel Engine
Mechanics
33. Ignition - power stroke
Third Stroke (rotary)
Velocity
Fluid Power
Closed System
34. 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
Mass
Common Brake Characteristics
Engineers and scientists need a common language
Second Stroke (4 Stroke Engine)
35. Body at rest or is in equilibrium (wall)
Length
Mechanical Advantage
Static
Tension
36. A change in velocity over time -Unites: USA- ft/s^2 and SI: m/s^2
Translation
Acceleration
Disc Breaks
First Stroke (4 Stroke Engine)
37. Piston travels up and both plugs are closed
Moment Arm
Base Dimensions
more than one force
Second Stroke (4 Stroke Engine)
38. Piston travels up and exhaust valve opens. Combustion by product exhaustion
Fourth Stroke (4 Stroke Engine)
Open System
Area
Rotary
39. 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
will move
Area
Machine
Applied Brakes
40. 1. Magnitude: size - a numberi.e. 50 mph 2. Direction: angle i.e. N -E -W -S
Hybrid Series
4 Stroke Engine
Second Stroke (Diesel Engine)
Forces and Vectors
41. Describes a physical property of anything - What we are measuring
Fluids
Applied Brakes
Dimension
If the force is applied away from the center of rotation
42. Can be applied:-By direct contact: push - pull - twist -At a distance: gravity - magnetism Can change: speed - direction - shape - units of force
Forces
Force lets us do work on a system
Second Stroke (2 Stroke Engine)
Component
43. Intake of fuel and air mixture - compression of mixture by piston
Power Equation
Steam Engine
First Stroke (2 Stroke Engine)
no movement
44. A^2+b^2=c^2
Acceleration
Work
Translation
Pythagorean Theorem Equation
45. Psi - newtons - pascals
First Stroke (rotary)
Units for Pressure
Pythagorean Theorem
Volume
46. 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
Pythagorean Theorem
Rotary
System International (SI)
Area
47. Liquid or gas
Pythagorean Theorem
Effort
Fluid
Third Stroke (4 Stroke Engine)
48. When the sum of all forces and the sum of all moments both equal forces - No movement
Newton's Second Law
Velocity
4 Stroke Engine
Equilibrium
49. Same pressure - work - volume - Different forces and distances
Second Stroke (4 Stroke Engine)
Hydraulic Cylinders
Translation
Forces and Vectors
50. 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 (2 Stroke Engine)
Couple
Equation for Mechanical Advantage regarding inclined planes
Base Dimensions