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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. Dimensions and units
Drum Brakes
Area
Engineers and scientists need a common language
Base Dimensions
2. A^2+b^2=c^2
Fourth Stroke (4 Stroke Engine)
Pythagorean Theorem
Moment Arm
Pythagorean Theorem Equation
3. When two parallel forces equal in magnitude and opposite direction - i.e. steering wheel - turn a know - turn on and off a faucet
System International (SI)
Couple
Newton's Second Law
Translation
4. Intake of fuel and air mixture - compression of mixture by piston
If the force is applied away from the center of rotation
Mechanical Engineering
First Stroke (2 Stroke Engine)
Pythagorean Theorem Equation
5. Are independent of other dimensions - They are limited in number - length - mass - time - temperature - force
Shear
Torque
Base Dimensions
Mechanical Advantage
6. Intake of fuel and air mix
Units for Pressure
First Stroke (rotary)
Torque
Pythagorean Theorem
7. Can be reduced by decreasing the weight or force or increasing the area i.e. airbag
Area Equation
Pressure
Surroundings
Tension
8. Describes how applied forces bring a body into motion
Area
Dynamics
Derived Dimension
Open System
9. Length / Time
Pressure
Pythagorean Theorem
Velocity
Power Equation
10. In a right triangle - the sum of the squares of the sides equals the square of the hypotenous
System
Pythagorean Theorem
First Stroke (rotary)
Vectors
11. 1. Magnitude: size - a numberi.e. 50 mph 2. Direction: angle i.e. N -E -W -S
no movement
Base Dimensions
Engineers and scientists need a common language
Forces and Vectors
12. When the fluid is in motion
Rotary
Hydraulics
Units
Hydrodynamics
13. 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
Component
Gravity
Mass
14. Rotation will not occur - but translation might occur
Area
If the force is applied at the center of the rotation
will move
Weight
15. The branch of science and engineering involving measurement
System
Metrology
Hydraulics
Moment Arm
16. 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 (
Compression
Mechanical Engineering
If the force is applied away from the center of rotation
System International (SI)
17. 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
4 Stroke Engine
Conversions
Area
Pythagorean Theorem
18. Allows comparison between different measuring systems and units - Necessary to market internationally
Conversions
Pythagorean Theorem
more than one force
Mechanical Advantage
19. A movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)
Rotation
Fourth Stroke (Diesel Engine)
Tension
Newton's Second Law
20. If a force causes rotations -Vector- Machines can have more than one torque-Units: foot- pound and newton - meter - i.e. engines - airplanes - propeller
Dimension
Applied Brakes
Pythagorean Theorem
Torque
21. 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
Second Stroke (rotary)
Second Stroke (4 Stroke Engine)
Mechanical Engineering
Base Dimensions
22. When the work done by the effort just equals the work done by the load - ______ of the machine will occur
Diesel Engine
Hydraulics
Second Stroke (2 Stroke Engine)
no movement
23. Static - Dynamic
Pythagorean Theorem Equation
Steam Engine
4 Stroke Engine
Mechanics describe how forces affect a body
24. 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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25. When fluid is at rest
Units
will move
Fluid Power
Hydrostatics
26. Air is compressed - work is done on the system
Fourth Stroke (Diesel Engine)
Base Dimensions
Second Stroke (Diesel Engine)
Rotation
27. Same pressure - work - volume - Different forces and distances
Hydraulic Cylinders
Diesel Engine
First Stroke (2 Stroke Engine)
Rotary
28. Fuel is injected and combusts due to temperature of compressed air
Couple
Temperature
Third Stroke (Diesel Engine)
Mechanical Engineering
29. Old technology- harder to service-Still used on big trucks and trailers because they are too expensive to convert
Base Dimensions
Drum Brakes
Forces and Vectors
System
30. 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.
Volume
2 Stroke Engine
Mechanics describe how forces affect a body
no movement
31. A^2+b^2=c^2 - used to calculate vectors
Force Equation
Pythagorean Theorem
Rotation
Common Brake Characteristics
32. Energy may enter or leave. Mass can enter or leave the system i.e. open water bottle - molecule - hydraulic cylinder - human
Open System
Closed System
Result of Applying a force to a rigid body at rest
Units
33. Derived from - or composed of - base dimensions i.e. Area (length x width) - Weight (mass x acceleration) - velocity (length/time)
Equilibrium
Derived Dimension
More than one force
System
34. 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
Hydraulics
Hybrid
Moment Arm
Gravity
35. Often a free body has _______ acting on it
Pythagorean Theorem
Law of Conservation of Mass
more than one force
Volume
36. Rotation may occur
Fourth Stroke (rotary)
will move
If the force is applied away from the center of rotation
Internal Combustion Engine Types
37. One that pushes on an object
Third Stroke (Diesel Engine)
Force Equation
Compression
Velocity
38. A change in velocity over time -Unites: USA- ft/s^2 and SI: m/s^2
Acceleration
Third Stroke (rotary)
Engineers and scientists need a common language
System
39. Movement along a line (reciprocal or linear motion) -Units: feet and meters
Machine
Translation
Power
Mechanical Advantage Equation
40. A pull on an object
Forces
Tension
Component
Dynamics
41. Varies by location (on earth) - distance (from earth) - and mass (of planet)
Gravity
Power
Dynamics
Mechanical Advantage
42. Modern Technology- More efficient-Better Cooling-Easier to service- longer life - lither weight- More expensive
Disc Breaks
Power Equation
Hydrodynamics
Acceleration
43. Describes a physical property of anything - What we are measuring
Fourth Stroke (Diesel Engine)
Hydraulics
Dimension
Fourth Stroke (rotary)
44. A flat - two dimensional property -Units of length multiplied by length describe area -A=length x width
Units for Pressure
Area
Hydrostatics
First Stroke (rotary)
45. The magnitude of something in a particular direction
Length
Third Stroke (Diesel Engine)
Moment Arm
Torque
46. ICE generates electricity for electric battery -Electric motor turns wheels
2 Stroke Engine
Inclined Plane
Hybrid Series
Area
47. Force/Area
Force lets us do work on a system
Second Stroke (4 Stroke Engine)
Pressure Equation
Disc Breaks
48. Force without machine/Force with machine
Tension
Mechanical Advantage Equation
Closed System
Derived Dimension
49. Piston travels down and intake valve is opened. Intake of fuel and air into chamber
Moment Arm Equation
Aerodynamics
First Stroke (4 Stroke Engine)
Shear
50. Piston travels up and both plugs are closed
Area of a circle equation
Statics
Couple
Second Stroke (4 Stroke Engine)