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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. Force/Area
Steam Engine
US Customary
Pressure Equation
Static
2. What we are studying
Hydraulic Cylinders
Closed System
First Stroke (2 Stroke Engine)
System
3. Piston travels down and intake valve is opened. Intake of fuel and air into chamber
First Stroke (4 Stroke Engine)
Units
If the force is applied away from the center of rotation
Second Stroke (rotary)
4. What we are not studying
Second Stroke (Diesel Engine)
Hydraulics
Surroundings
Fluid Power
5. When fluid is at rest
Hydrostatics
More than one force
Mechanical Engineering
Machine
6. Force x Distance
Moment Arm Equation
Engineers and scientists need a common language
Second Stroke (rotary)
System
7. When the work done by the effort just equals the work done by the load - ______ of the machine will occur
Component
Power Equation
Machine
no movement
8. 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
Law of Conservation of Mass
Engineers and scientists need a common language
Effort
9. Psi - newtons - pascals
Internal Combustion Engine Types
Dynamics
Units for Pressure
Effort
10. Piston travels up and both plugs are closed
Second Stroke (4 Stroke Engine)
Gravity
decrease
Fourth Stroke (Diesel Engine)
11. When the fluid is in motion
Newton's Second Law
Fourth Stroke (rotary)
Hydrodynamics
Mechanical Advantage Equation
12. (pi) x (radius)^2
Area of a circle equation
Steam Engine
Third Stroke (4 Stroke Engine)
Force lets us do work on a system
13. A small piece that makes up a larger whole. Each component is there for a specific job - but the sum of components
Hybrid Parallel
Component
Applied Brakes
Area
14. Body in motion (car)
If the force is applied away from the center of rotation
Dynamics
Power Equation
Conversions
15. One that pushes on an object
Compression
Open System
Fourth Stroke (Diesel Engine)
Hybrid Parallel
16. Energy may enter or leave. No mass enters or leaves the system i.e. Closed water bottle - car engine - human
Velocity
Forces and Vectors
more than one force
Closed System
17. Applied at an angle or parallel to a surface
Law of Conservation of Mass
Newton's Third Law
Tension
Shear
18. A change in velocity over time -Unites: USA- ft/s^2 and SI: m/s^2
Acceleration
Result of Applying a force to a rigid body at rest
Hydrostatics
Force Equation
19. Length x Width x Height
Volume
Fourth Stroke (rotary)
Second Stroke (4 Stroke Engine)
Drum Brakes
20. 1. Magnitude: size - a numberi.e. 50 mph 2. Direction: angle i.e. N -E -W -S
Mechanical Advantage Equation
Forces and Vectors
Static
Steam Engine
21. When the sum of all forces and the sum of all moments both equal forces - No movement
Equilibrium
Mechanical Engineering
Mass
Surroundings
22. (Force)(Distance)/Seconds
Surroundings
Power Equation
Third Stroke (4 Stroke Engine)
Result of Applying a force to a rigid body at rest
23. Force without machine/Force with machine
Mechanical Advantage Equation
Force Equation
Temperature
Applied Brakes
24. Result of gravity acting on mass -The greater the mass - the greater the weight -Is a force -Units: lbs - N
Moment Arm Equation
Weight
Power
Hybrid
25. 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
Conversions
Mechanical Advantage
Newton's First Law of Motion
Area
26. Rotation will not occur - but translation might occur
Disc Breaks
If the force is applied at the center of the rotation
Translation
Open System
27. A flat - two dimensional property -Units of length multiplied by length describe area -A=length x width
Statics
Area
Base Dimensions
Pascal's Principle
28. Used to measure or quantify -US Common: Absolute and Gravitational -SI: absolute
Equilibrium
Translation
Diesel Engine
Units
29. 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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30. A pull on an object
Forces and Vectors
Force lets us do work on a system
Length
Tension
31. Mechanics is an application of math that describes how forces affect a body
Couple
Shear
Mass
Mechanics
32. 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
Effort
First Stroke (rotary)
Dimension
33. The standard system of units that uses base 10 and used in the rest of the world. US does not use - but Great Britain does - Base Units: mass - kilograms (kg) - length- meters (m) - and time-Seconds (S) - Force is a derived unit measured in newtons (
Applied Brakes
Open System
System International (SI)
decrease
34. Air is drawn in
First Stroke (Diesel Engine)
Mass
First Stroke (rotary)
Pythagorean Theorem
35. A^2+b^2=c^2 - used to calculate vectors
2 Stroke Engine
Third Stroke (4 Stroke Engine)
Pythagorean Theorem
Second Stroke (rotary)
36. The force simple machines use to do work on a single load or against a single force
Internal Combustion Engine Types
Base Dimensions
Hydrodynamics
Effort
37. Can be reduced by decreasing the weight or force or increasing the area i.e. airbag
Pressure
Surroundings
Couple
Aerodynamics
38. 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.
Newton's First Law of Motion
2 Stroke Engine
Law of Conservation of Mass
Mechanics describe how forces affect a body
39. Two stroke- Four Stroke- Diesel-Rotary -Hybrid
Internal Combustion Engine Types
Newton's Second Law
Dynamics
Machine
40. Derived from - or composed of - base dimensions i.e. Area (length x width) - Weight (mass x acceleration) - velocity (length/time)
Fluids
Fourth Stroke (rotary)
Hydraulics
Derived Dimension
41. Describes how applied forces bring a body into rest or equilibrium
Length
Statics
Forces
Mechanical Advantage
42. Mass can neither by created nor destroyed - only transformed
System
Law of Conservation of Mass
Couple
Static
43. The perpendicular distance from the pivot point to the point of application of the force (d) - M=Fd -Clockwise=Negative moment -Counterclockwise=Positive moment
Fluid Power
Third Stroke (Diesel Engine)
System International (SI)
Moment Arm
44. A^2+b^2=c^2
Third Stroke (4 Stroke Engine)
Translation
Mechanical Engineering
Pythagorean Theorem Equation
45. Varies by location (on earth) - distance (from earth) - and mass (of planet)
Temperature
Fluids
Gravity
Moment Arm
46. When two parallel forces equal in magnitude and opposite direction - i.e. steering wheel - turn a know - turn on and off a faucet
Couple
Fourth Stroke (rotary)
First Stroke (2 Stroke Engine)
Internal Combustion Engine Types
47. A combination of components
System
Pythagorean Theorem
Component
US Customary
48. 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
2 Stroke Engine
Hybrid
Third Stroke (rotary)
Pythagorean Theorem
49. Work/force or vertical distance/sloping distance
Equation for Mechanical Advantage regarding inclined planes
First Stroke (Diesel Engine)
Component
Hybrid
50. A fluid power system uses hydraulics and a fluid under pressure to create a greater force than is applied
Result of Applying a force to a rigid body at rest
Gravity
Hybrid
Fluid Power