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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. Length x Width
Gravity
Common Brake Characteristics
Area Equation
Volume
2. A small piece that makes up a larger whole. Each component is there for a specific job - but the sum of components
Component
Mass
Volume
First Stroke (Diesel Engine)
3. A pull on an object
Direction of Forces
Newton's Third Law
Tension
Velocity
4. When the moving fluid is a gas
Pythagorean Theorem
Area
Power Equation
Aerodynamics
5. When a simple machine increases a force it is at the expense of a ____ in the distance the load is moved
US Customary
Pythagorean Theorem
Dynamics
decrease
6. Force/Area
Pressure Equation
Hydraulic Cylinders
Equation for Mechanical Advantage regarding inclined planes
Effort
7. A fluid power system uses hydraulics and a fluid under pressure to create a greater force than is applied
Applied Brakes
Conversions
Fluid Power
will move
8. Rotation will not occur - but translation might occur
If the force is applied at the center of the rotation
Engineers and scientists need a common language
Dynamics
Machine
9. 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
Aerodynamics
Open System
Hybrid
Mechanical Engineering
10. Compression of fuel mix
Steam Engine
Third Stroke (rotary)
Second Stroke (rotary)
Engineers and scientists need a common language
11. Psi - newtons - pascals
Mechanical Advantage Equation
System
First Stroke (Diesel Engine)
Units for Pressure
12. Movement along a line (reciprocal or linear motion) -Units: feet and meters
Area
Units
Fluid
Translation
13. When two parallel forces equal in magnitude and opposite direction - i.e. steering wheel - turn a know - turn on and off a faucet
Hydraulic Cylinders
Couple
Torque
Second Stroke (rotary)
14. Work/force or vertical distance/sloping distance
If the force is applied at the center of the rotation
Fluid Power
Gravity
Equation for Mechanical Advantage regarding inclined planes
15. A flat - sloping surface -The only simple machine that does not move -The force is applied to the ramp - since this is the direction the load weight is moved -Sloping side is longer than vertical side -Less force is required to accomplish the same am
Newton's Second Law
Pythagorean Theorem Equation
Inclined Plane
More than one force
16. Combustion of fuel mixture ignited by spark plug
Second Stroke (2 Stroke Engine)
Surroundings
Mechanical Advantage Equation
First Stroke (Diesel Engine)
17. 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
Area of a circle equation
Shear
Pressure
18. 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
Fourth Stroke (4 Stroke Engine)
Rotary
Equilibrium
Hydrodynamics
19. Describes how applied forces bring a body into rest or equilibrium
Statics
Result of Applying a force to a rigid body at rest
Mechanics
4 Stroke Engine
20. 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
Direction of Forces
more than one force
Machine
Pascal's Principle
21. 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
Area
Dimension
Second Stroke (rotary)
Hydraulics
22. 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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23. Result of gravity acting on mass -The greater the mass - the greater the weight -Is a force -Units: lbs - N
Velocity
Third Stroke (4 Stroke Engine)
Weight
More than one force
24. 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
Acceleration
Moment Arm Equation
Mechanical Advantage
Fourth Stroke (rotary)
25. Used to measure or quantify -US Common: Absolute and Gravitational -SI: absolute
Units
Newton's Third Law
Surroundings
Force lets us do work on a system
26. When the work done by the effort exceeds the work done by the load - the load...
Tension
If the force is applied away from the center of rotation
Translation
will move
27. 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
Applied Brakes
Static
Power Equation
Mechanics
28. Both engines drive wheels -ICE used for cruising -Electric motor assists with low speed for acceleration and hill climbing
Length
Hybrid Parallel
Result of Applying a force to a rigid body at rest
Dynamics
29. Piston travels up and both plugs are closed
Second Stroke (4 Stroke Engine)
More than one force
Pressure Equation
Moment Arm
30. Combustion ignited by spark plug and materials are compressed
Aerodynamics
Derived Dimension
Third Stroke (4 Stroke Engine)
Rotation
31. Intake of fuel and air mixture - compression of mixture by piston
no movement
Fourth Stroke (rotary)
First Stroke (2 Stroke Engine)
Pythagorean Theorem
32. (pi) x (radius)^2
First Stroke (Diesel Engine)
Area of a circle equation
Area Equation
Internal Combustion Engine Types
33. When the work done by the effort just equals the work done by the load - ______ of the machine will occur
Work
Power Equation
no movement
Mechanical Advantage Equation
34. Are independent of other dimensions - They are limited in number - length - mass - time - temperature - force
Work
Base Dimensions
more than one force
Derived Dimension
35. When fluid is at rest
Hydrostatics
Dimension
If the force is applied at the center of the rotation
Open System
36. Can be applied at a time on an object
Base Dimensions
Dimension
More than one force
Steam Engine
37. Force and mass are proportional to each other (F=ma) -If F increases - so does acceleration -Force causes acceleration - More force means more acceleration - same mass - More mass means less acceleration - same force
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38. Length / Time
Velocity
Mechanics
Pressure Equation
Volume
39. ICE generates electricity for electric battery -Electric motor turns wheels
Diesel Engine
Hybrid Series
Newton's Second Law
Acceleration
40. Causes acceleration -Units: USA: 32.2 ft/s^2 SI: 9.8 m/sec^2
Gravity
Translation
Aerodynamics
Force Equation
41. Can be applied:-By direct contact: push - pull - twist -At a distance: gravity - magnetism Can change: speed - direction - shape - units of force
4 Stroke Engine
Forces
Mechanics describe how forces affect a body
Static
42. 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
Newton's First Law of Motion
If the force is applied at the center of the rotation
Law of Conservation of Mass
43. Weight/Time
Third Stroke (4 Stroke Engine)
Second Stroke (2 Stroke Engine)
Power Equation
Newton's First Law of Motion
44. Ignition - power stroke
First Stroke (rotary)
Third Stroke (rotary)
Applied Brakes
Closed System
45. Mechanics is an application of math that describes how forces affect a body
Mechanics
If the force is applied away from the center of rotation
Gravity
First Stroke (2 Stroke Engine)
46. When the fluid is in motion
Hydrodynamics
Length
Effort
Torque
47. ...
More than one force
Area of a circle equation
Force lets us do work on a system
Pythagorean Theorem Equation
48. A movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)
Second Stroke (Diesel Engine)
Rotation
Steam Engine
4 Stroke Engine
49. When the sum of all forces and the sum of all moments both equal forces - No movement
4 Stroke Engine
Equilibrium
Third Stroke (4 Stroke Engine)
Acceleration
50. 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
Force Equation
Moment Arm
Mechanics
Work