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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 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
Second Stroke (4 Stroke Engine)
Work
Steam Engine
2. Can be applied:-By direct contact: push - pull - twist -At a distance: gravity - magnetism Can change: speed - direction - shape - units of force
Hydrodynamics
Forces
Aerodynamics
Mechanics describe how forces affect a body
3. 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
Mechanical Engineering
Fluid
Fluid Power
Machine
4. Piston travels up and both plugs are closed
Units for Pressure
Second Stroke (4 Stroke Engine)
Rotation
Applied Brakes
5. 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.
2 Stroke Engine
Tension
will move
Law of Conservation of Mass
6. Exhaust
Third Stroke (rotary)
Dynamics
Fourth Stroke (Diesel Engine)
Equilibrium
7. ...
Inclined Plane
Rotary
Force lets us do work on a system
Newton's First Law of Motion
8. When the work done by the effort exceeds the work done by the load - the load...
Temperature
Component
will move
Engineers and scientists need a common language
9. The perpendicular distance from the pivot point to the point of application of the force (d) - M=Fd -Clockwise=Negative moment -Counterclockwise=Positive moment
Moment Arm
More than one force
Drum Brakes
Hybrid Series
10. A movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)
Pythagorean Theorem
Hydrostatics
Rotation
Mechanical Advantage
11. A flat - two dimensional property -Units of length multiplied by length describe area -A=length x width
Length
will move
Direction of Forces
Area
12. 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
Power Equation
4 Stroke Engine
If the force is applied at the center of the rotation
Hydraulic Cylinders
13. Both engines drive wheels -ICE used for cruising -Electric motor assists with low speed for acceleration and hill climbing
Aerodynamics
Velocity
Hybrid Parallel
more than one force
14. Combustion ignited by spark plug and materials are compressed
Rotary
Hydraulic Cylinders
Volume
Third Stroke (4 Stroke Engine)
15. Liquid or gas
Hydrostatics
Fluid
Surroundings
no movement
16. Mass x acceleration
Applied Brakes
Mechanical Advantage
Force Equation
Compression
17. If a force causes rotations -Vector- Machines can have more than one torque-Units: foot- pound and newton - meter - i.e. engines - airplanes - propeller
Rotation
Static
Base Dimensions
Torque
18. Exhaust of combustion products
Hydrostatics
Engineers and scientists need a common language
First Stroke (4 Stroke Engine)
Fourth Stroke (rotary)
19. 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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20. Applied at an angle or parallel to a surface
Work
Newton's Second Law
Mechanical Advantage
Shear
21. What we are studying
First Stroke (rotary)
System
Pythagorean Theorem
Rotary
22. 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
Tension
Forces
Equation for Mechanical Advantage regarding inclined planes
Mechanical Advantage
23. 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
Acceleration
2 Stroke Engine
Hydraulics
Hybrid Series
24. 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
Applied Brakes
Hybrid
Mechanics describe how forces affect a body
Force lets us do work on a system
25. 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
Third Stroke (Diesel Engine)
Static
Equation for Mechanical Advantage regarding inclined planes
26. Rotation may occur
Third Stroke (Diesel Engine)
Metrology
If the force is applied away from the center of rotation
Mechanical Engineering
27. When a simple machine increases a force it is at the expense of a ____ in the distance the load is moved
Conversions
Equilibrium
decrease
Pascal's Principle
28. Used to measure or quantify -US Common: Absolute and Gravitational -SI: absolute
Second Stroke (2 Stroke Engine)
Hybrid Parallel
Derived Dimension
Units
29. Can be applied at a time on an object
Pressure Equation
More than one force
First Stroke (4 Stroke Engine)
First Stroke (Diesel Engine)
30. Incompressible (volume doesnt change) Transmit force evenly - Lubricates - Trap contaminants - Some based on vegetable oils - Biodegradable - Aircraft fluids noncombustible (thins as temperature rises)
Fluids
First Stroke (2 Stroke Engine)
Fourth Stroke (rotary)
Units
31. 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
System
Velocity
Fluid Power
32. Often a free body has _______ acting on it
Closed System
Mechanics describe how forces affect a body
Dynamics
more than one force
33. Causes acceleration -Units: USA: 32.2 ft/s^2 SI: 9.8 m/sec^2
Moment Arm Equation
Metrology
Gravity
2 Stroke Engine
34. Work/force or vertical distance/sloping distance
Area Equation
Equation for Mechanical Advantage regarding inclined planes
Tension
Hybrid Series
35. Result of gravity acting on mass -The greater the mass - the greater the weight -Is a force -Units: lbs - N
no movement
Pythagorean Theorem
Pressure
Weight
36. An indication of kinetic energy of mass at the molecular level
Temperature
Fourth Stroke (4 Stroke Engine)
Area
Direction of Forces
37. 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 (
System International (SI)
Second Stroke (2 Stroke Engine)
Dimension
Area
38. Intake of fuel and air mixture - compression of mixture by piston
Machine
decrease
First Stroke (2 Stroke Engine)
Couple
39. Length x Width
Force lets us do work on a system
Derived Dimension
Aerodynamics
Area Equation
40. Air is compressed - work is done on the system
Second Stroke (Diesel Engine)
Velocity
First Stroke (rotary)
First Stroke (2 Stroke Engine)
41. 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)
will move
Work
Power
Internal Combustion Engine Types
42. When the work done by the effort just equals the work done by the load - ______ of the machine will occur
Velocity
no movement
Power
Mechanics describe how forces affect a body
43. 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
Disc Breaks
Length
Rotary
Mechanical Engineering
44. A^2+b^2=c^2 - used to calculate vectors
Component
Work
Fourth Stroke (4 Stroke Engine)
Pythagorean Theorem
45. 1. Magnitude: size - a numberi.e. 50 mph 2. Direction: angle i.e. N -E -W -S
Acceleration
Forces and Vectors
Pressure
2 Stroke Engine
46. Static - Dynamic
Shear
Volume
Mechanics describe how forces affect a body
Acceleration
47. Psi - newtons - pascals
Units for Pressure
Third Stroke (rotary)
4 Stroke Engine
Newton's First Law of Motion
48. (pi) x (radius)^2
Temperature
Moment Arm Equation
Area of a circle equation
Forces
49. A combination of components
System
decrease
Power
Result of Applying a force to a rigid body at rest
50. In a right triangle - the sum of the squares of the sides equals the square of the hypotenous
Dynamics
will move
Pythagorean Theorem
Surroundings