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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 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
First Stroke (rotary)
Pressure Equation
US Customary
Power Equation
2. ICE generates electricity for electric battery -Electric motor turns wheels
Pythagorean Theorem
Metrology
Hybrid Series
Area of a circle equation
3. Combustion of fuel mixture ignited by spark plug
Second Stroke (2 Stroke Engine)
Applied Brakes
Law of Conservation of Mass
Forces and Vectors
4. Air is compressed - work is done on the system
Steam Engine
Dynamics
Second Stroke (Diesel Engine)
Hybrid Parallel
5. 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
US Customary
Mechanical Advantage
Rotary
Tension
6. Mass x acceleration
Force Equation
Newton's First Law of Motion
Pythagorean Theorem Equation
Fourth Stroke (Diesel Engine)
7. Translation (slide) -Rotate -Slide and Rotate Together
Shear
Result of Applying a force to a rigid body at rest
Power Equation
Length
8. Mass can neither by created nor destroyed - only transformed
US Customary
Law of Conservation of Mass
Newton's First Law of Motion
Dynamics
9. When two parallel forces equal in magnitude and opposite direction - i.e. steering wheel - turn a know - turn on and off a faucet
Pythagorean Theorem
Law of Conservation of Mass
Velocity
Couple
10. Piston travels up and both plugs are closed
Pressure Equation
Length
Newton's Third Law
Second Stroke (4 Stroke Engine)
11. When the work done by the effort just equals the work done by the load - ______ of the machine will occur
no movement
Fourth Stroke (4 Stroke Engine)
Hybrid Parallel
Machine
12. Movement along a line (reciprocal or linear motion) -Units: feet and meters
Length
System
Translation
Second Stroke (Diesel Engine)
13. 1. Magnitude: size - a numberi.e. 50 mph 2. Direction: angle i.e. N -E -W -S
Fluid
Mass
Forces and Vectors
Fourth Stroke (rotary)
14. A fluid power system uses hydraulics and a fluid under pressure to create a greater force than is applied
Newton's Second Law
more than one force
Power Equation
Fluid Power
15. When the moving fluid is a gas
Law of Conservation of Mass
Aerodynamics
Third Stroke (4 Stroke Engine)
Units
16. When the sum of all forces and the sum of all moments both equal forces - No movement
Force lets us do work on a system
Dimension
Equilibrium
Pressure
17. Piston travels up and exhaust valve opens. Combustion by product exhaustion
Base Dimensions
Power Equation
Fluid Power
Fourth Stroke (4 Stroke Engine)
18. 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
Metrology
Internal Combustion Engine Types
Third Stroke (rotary)
19. Exhaust
Fourth Stroke (Diesel Engine)
Third Stroke (rotary)
Units for Pressure
Result of Applying a force to a rigid body at rest
20. Same pressure - work - volume - Different forces and distances
System
First Stroke (4 Stroke Engine)
Hydraulic Cylinders
Fluid
21. Ignition - power stroke
Hydrodynamics
Dynamics
System International (SI)
Third Stroke (rotary)
22. Length / Time
Pythagorean Theorem
Velocity
more than one force
Dimension
23. What we are studying
First Stroke (Diesel Engine)
Velocity
Mechanics describe how forces affect a body
System
24. Describes how applied forces bring a body into motion
Area
Units for Pressure
Volume
Dynamics
25. A pull on an object
Pythagorean Theorem Equation
Second Stroke (Diesel Engine)
decrease
Tension
26. Can be applied:-By direct contact: push - pull - twist -At a distance: gravity - magnetism Can change: speed - direction - shape - units of force
Mechanical Advantage Equation
Forces
Fluid
Pressure
27. Body in motion (car)
Inclined Plane
decrease
Steam Engine
Dynamics
28. Fuel is injected and combusts due to temperature of compressed air
Pythagorean Theorem
Third Stroke (Diesel Engine)
will move
Vectors
29. A^2+b^2=c^2 - used to calculate vectors
Pythagorean Theorem
Mechanical Advantage Equation
Derived Dimension
Area
30. Liquid or gas
Fluid
Second Stroke (2 Stroke Engine)
Pythagorean Theorem
Compression
31. Length x Width x Height
Power
Hydraulics
Volume
Disc Breaks
32. Four Stroke Engine -Used in hotter areas because more efficient -Higher compression ratio than gasoline
Diesel Engine
Rotation
First Stroke (Diesel Engine)
Component
33. Energy may enter or leave. No mass enters or leaves the system i.e. Closed water bottle - car engine - human
Closed System
Internal Combustion Engine Types
Rotary
Conversions
34. Compression-Tension-Shear
Area of a circle equation
Mechanics
Direction of Forces
more than one force
35. A flat - two dimensional property -Units of length multiplied by length describe area -A=length x width
Second Stroke (rotary)
Dimension
Area
Conversions
36. Used to measure or quantify -US Common: Absolute and Gravitational -SI: absolute
Third Stroke (rotary)
Conversions
Units
System
37. Energy may enter or leave. Mass can enter or leave the system i.e. open water bottle - molecule - hydraulic cylinder - human
Mechanical Advantage Equation
Open System
Machine
Dimension
38. 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
Hydraulic Cylinders
Gravity
Open System
39. An indication of kinetic energy of mass at the molecular level
Diesel Engine
Hybrid Parallel
Temperature
Units
40. When the work done by the effort exceeds the work done by the load - the load...
Pythagorean Theorem
will move
Moment Arm
Force lets us do work on a system
41. What we are not studying
Engineers and scientists need a common language
Tension
Newton's Third Law
Surroundings
42. Often a free body has _______ acting on it
Rotation
Steam Engine
4 Stroke Engine
more than one force
43. A movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)
Component
Rotation
Applied Brakes
Rotary
44. Describes how applied forces bring a body into rest or equilibrium
Gravity
Couple
Statics
Hydrodynamics
45. 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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46. Static - Dynamic
Pascal's Principle
Shear
Static
Mechanics describe how forces affect a body
47. Both engines drive wheels -ICE used for cruising -Electric motor assists with low speed for acceleration and hill climbing
Equation for Mechanical Advantage regarding inclined planes
Drum Brakes
Second Stroke (Diesel Engine)
Hybrid Parallel
48. Causes acceleration -Units: USA: 32.2 ft/s^2 SI: 9.8 m/sec^2
Mechanics describe how forces affect a body
Shear
Gravity
Forces and Vectors
49. Compression of fuel mix
Second Stroke (rotary)
Derived Dimension
Hydraulic Cylinders
more than one force
50. Force x Distance
Moment Arm Equation
Component
Common Brake Characteristics
Force Equation