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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. Translation (slide) -Rotate -Slide and Rotate Together
Third Stroke (Diesel Engine)
First Stroke (Diesel Engine)
Result of Applying a force to a rigid body at rest
Second Stroke (2 Stroke Engine)
2. A^2+b^2=c^2
First Stroke (Diesel Engine)
Units
Pythagorean Theorem Equation
Gravity
3. 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
US Customary
Hydrostatics
Force lets us do work on a system
Tension
4. In a right triangle - the sum of the squares of the sides equals the square of the hypotenous
Hydraulic Cylinders
Pythagorean Theorem
Hybrid
Area of a circle equation
5. 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
Disc Breaks
Power Equation
System International (SI)
Hybrid
6. 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
Disc Breaks
Engineers and scientists need a common language
Hydraulics
Mechanics describe how forces affect a body
7. Movement along a line (reciprocal or linear motion) -Units: feet and meters
Mechanical Engineering
more than one force
Translation
Fourth Stroke (4 Stroke Engine)
8. When the fluid is in motion
more than one force
Hydrodynamics
Volume
Component
9. Describes how applied forces bring a body into motion
4 Stroke Engine
Tension
Fluid Power
Dynamics
10. Can be applied at a time on an object
Fourth Stroke (Diesel Engine)
Moment Arm
More than one force
Area
11. 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
Temperature
Pressure Equation
Mechanical Advantage
Applied Brakes
12. One that pushes on an object
Moment Arm
Gravity
Effort
Compression
13. Work/force or vertical distance/sloping distance
Hydrostatics
Equation for Mechanical Advantage regarding inclined planes
Pressure Equation
If the force is applied away from the center of rotation
14. Piston travels up and both plugs are closed
Third Stroke (Diesel Engine)
Effort
Second Stroke (4 Stroke Engine)
Compression
15. A flat - two dimensional property -Units of length multiplied by length describe area -A=length x width
Aerodynamics
Work
First Stroke (rotary)
Area
16. The force simple machines use to do work on a single load or against a single force
Hydraulic Cylinders
Effort
Mechanics describe how forces affect a body
Force lets us do work on a system
17. External Combustion engine -Only used in factories and plants (not used in cars)
Compression
Rotation
Steam Engine
First Stroke (2 Stroke Engine)
18. (pi) x (radius)^2
Forces and Vectors
Area of a circle equation
Mass
Moment Arm
19. Combustion ignited by spark plug and materials are compressed
Third Stroke (4 Stroke Engine)
Weight
4 Stroke Engine
Pythagorean Theorem
20. Rotation will not occur - but translation might occur
Hydraulic Cylinders
If the force is applied at the center of the rotation
Statics
Hybrid
21. Incompressible (volume doesnt change) Transmit force evenly - Lubricates - Trap contaminants - Some based on vegetable oils - Biodegradable - Aircraft fluids noncombustible (thins as temperature rises)
Base Dimensions
Dynamics
Fluids
Tension
22. Exhaust of combustion products
Hydraulics
Conversions
First Stroke (Diesel Engine)
Fourth Stroke (rotary)
23. 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
Metrology
Engineers and scientists need a common language
Units for Pressure
24. 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
If the force is applied at the center of the rotation
More than one force
Vectors
Mechanics describe how forces affect a body
25. When a simple machine increases a force it is at the expense of a ____ in the distance the load is moved
If the force is applied at the center of the rotation
Power
decrease
Drum Brakes
26. If a force causes rotations -Vector- Machines can have more than one torque-Units: foot- pound and newton - meter - i.e. engines - airplanes - propeller
Hybrid Parallel
Mechanical Engineering
Fluid
Torque
27. Length x Width x Height
Steam Engine
Second Stroke (Diesel Engine)
Volume
Statics
28. When two parallel forces equal in magnitude and opposite direction - i.e. steering wheel - turn a know - turn on and off a faucet
Couple
Volume
decrease
Third Stroke (rotary)
29. The magnitude of something in a particular direction
Metrology
Hydrostatics
Hybrid Parallel
Length
30. Force without machine/Force with machine
Second Stroke (Diesel Engine)
Mechanical Advantage Equation
Moment Arm
Equation for Mechanical Advantage regarding inclined planes
31. Varies by location (on earth) - distance (from earth) - and mass (of planet)
First Stroke (rotary)
Statics
Gravity
Hybrid Series
32. When fluid is at rest
Aerodynamics
Moment Arm Equation
Hydrostatics
Forces
33. 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
Tension
Fluids
Second Stroke (Diesel Engine)
Mass
34. Four Stroke Engine -Used in hotter areas because more efficient -Higher compression ratio than gasoline
Pythagorean Theorem Equation
Diesel Engine
Static
Dynamics
35. Often a free body has _______ acting on it
Dimension
more than one force
System International (SI)
If the force is applied away from the center of rotation
36. When the work done by the effort exceeds the work done by the load - the load...
will move
Third Stroke (4 Stroke Engine)
Pressure
Disc Breaks
37. Weight/Time
Second Stroke (4 Stroke Engine)
Power Equation
Result of Applying a force to a rigid body at rest
Hydraulic Cylinders
38. Exhaust
Equilibrium
Second Stroke (Diesel Engine)
Fourth Stroke (Diesel Engine)
2 Stroke Engine
39. Mechanics is an application of math that describes how forces affect a body
Torque
Hydrostatics
Mechanics
Compression
40. 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.
Forces and Vectors
Result of Applying a force to a rigid body at rest
2 Stroke Engine
Newton's First Law of Motion
41. Causes acceleration -Units: USA: 32.2 ft/s^2 SI: 9.8 m/sec^2
Power
Fourth Stroke (rotary)
Gravity
Forces
42. Ignition - power stroke
Derived Dimension
Third Stroke (rotary)
Pythagorean Theorem
Common Brake Characteristics
43. Can be reduced by decreasing the weight or force or increasing the area i.e. airbag
Rotation
Fluids
Pressure
Fourth Stroke (Diesel Engine)
44. Used to measure or quantify -US Common: Absolute and Gravitational -SI: absolute
Volume
Units
Power
Force Equation
45. Psi - newtons - pascals
Direction of Forces
Hydraulic Cylinders
Dynamics
Units for Pressure
46. A movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)
Rotation
Engineers and scientists need a common language
Fluids
Fluid Power
47. Intake of fuel and air mix
Torque
Diesel Engine
Units
First Stroke (rotary)
48. 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
Area
Dynamics
Newton's Second Law
Applied Brakes
49. Liquid or gas
Inclined Plane
First Stroke (4 Stroke Engine)
Effort
Fluid
50. Describes how applied forces bring a body into rest or equilibrium
Static
Dynamics
If the force is applied away from the center of rotation
Statics