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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. Piston travels up and both plugs are closed
Second Stroke (4 Stroke Engine)
If the force is applied at the center of the rotation
Statics
Force Equation
2. When the work done by the effort exceeds the work done by the load - the load...
will move
System
Units
Area
3. 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
Fluid Power
4 Stroke Engine
Inclined Plane
Metrology
4. Often a free body has _______ acting on it
Internal Combustion Engine Types
more than one force
Force lets us do work on a system
Velocity
5. When the sum of all forces and the sum of all moments both equal forces - No movement
If the force is applied away from the center of rotation
Equilibrium
Tension
Hydrodynamics
6. (Force)(Distance)/Seconds
Power Equation
Rotary
Velocity
Units
7. Body in motion (car)
Third Stroke (Diesel Engine)
4 Stroke Engine
Dynamics
Fourth Stroke (4 Stroke Engine)
8. Result of gravity acting on mass -The greater the mass - the greater the weight -Is a force -Units: lbs - N
Area
Torque
Weight
Conversions
9. Both engines drive wheels -ICE used for cruising -Electric motor assists with low speed for acceleration and hill climbing
Volume
Hybrid Parallel
Weight
will move
10. Fuel is injected and combusts due to temperature of compressed air
Hybrid Parallel
Third Stroke (Diesel Engine)
Statics
Force Equation
11. 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
Hydraulic Cylinders
Couple
Second Stroke (2 Stroke Engine)
12. Describes how applied forces bring a body into rest or equilibrium
Area
Law of Conservation of Mass
Statics
Fluid
13. Mass can neither by created nor destroyed - only transformed
Pascal's Principle
Rotary
Law of Conservation of Mass
Power
14. Used to measure or quantify -US Common: Absolute and Gravitational -SI: absolute
Metrology
Equilibrium
Units
Work
15. When the fluid is in motion
Hydraulics
Result of Applying a force to a rigid body at rest
Mechanical Advantage
Hydrodynamics
16. Length x Width x Height
Area
Pythagorean Theorem
Volume
will move
17. 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
Rotary
Applied Brakes
Fourth Stroke (Diesel Engine)
Third Stroke (Diesel Engine)
18. When the work done by the effort just equals the work done by the load - ______ of the machine will occur
Hybrid
Work
Mechanical Advantage
no movement
19. When the moving fluid is a gas
Velocity
Pythagorean Theorem
Translation
Aerodynamics
20. Modern Technology- More efficient-Better Cooling-Easier to service- longer life - lither weight- More expensive
Fourth Stroke (Diesel Engine)
Result of Applying a force to a rigid body at rest
Disc Breaks
Pascal's Principle
21. Movement along a line (reciprocal or linear motion) -Units: feet and meters
Metrology
Pressure Equation
Translation
Mechanics describe how forces affect a body
22. The force simple machines use to do work on a single load or against a single force
Effort
Fluid Power
Couple
Mechanical Advantage Equation
23. When two parallel forces equal in magnitude and opposite direction - i.e. steering wheel - turn a know - turn on and off a faucet
Power Equation
Equilibrium
Weight
Couple
24. Combustion of fuel mixture ignited by spark plug
Fourth Stroke (rotary)
Mechanics
Second Stroke (2 Stroke Engine)
Shear
25. Air is drawn in
First Stroke (Diesel Engine)
Newton's Second Law
Pressure Equation
First Stroke (4 Stroke Engine)
26. An indication of kinetic energy of mass at the molecular level
Temperature
Inclined Plane
Volume
Disc Breaks
27. Dimensions and units
Third Stroke (Diesel Engine)
Second Stroke (rotary)
Length
Engineers and scientists need a common language
28. Exhaust of combustion products
Fourth Stroke (rotary)
Pythagorean Theorem
US Customary
Rotary
29. Body at rest or is in equilibrium (wall)
Direction of Forces
Static
First Stroke (4 Stroke Engine)
Mechanical Advantage Equation
30. 1. Magnitude: size - a numberi.e. 50 mph 2. Direction: angle i.e. N -E -W -S
Closed System
no movement
more than one force
Forces and Vectors
31. 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
Statics
Velocity
Drum Brakes
Machine
32. Derived from - or composed of - base dimensions i.e. Area (length x width) - Weight (mass x acceleration) - velocity (length/time)
Derived Dimension
Pythagorean Theorem
Second Stroke (rotary)
Result of Applying a force to a rigid body at rest
33. Compression-Tension-Shear
Translation
Direction of Forces
Second Stroke (2 Stroke Engine)
Rotation
34. Intake of fuel and air mix
Temperature
Statics
First Stroke (rotary)
Closed System
35. One that pushes on an object
Compression
Second Stroke (4 Stroke Engine)
Units for Pressure
Applied Brakes
36. Describes a physical property of anything - What we are measuring
Aerodynamics
Newton's Third Law
Dimension
Pressure Equation
37. If a force causes rotations -Vector- Machines can have more than one torque-Units: foot- pound and newton - meter - i.e. engines - airplanes - propeller
Hydrodynamics
Pythagorean Theorem
Surroundings
Torque
38. 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
will move
Torque
Equation for Mechanical Advantage regarding inclined planes
Mechanical Engineering
39. Friction changes KE to heat energy- Heat is transferred to air- Front brakes work harder than rear- Some brakes use asbestos- Newer cars have dual braking systems - Don't drive through water or your brakes won't work well (ride breaks to dry them out
Disc Breaks
Aerodynamics
more than one force
Common Brake Characteristics
40. External Combustion engine -Only used in factories and plants (not used in cars)
Mechanics
Steam Engine
Applied Brakes
Fourth Stroke (rotary)
41. In a right triangle - the sum of the squares of the sides equals the square of the hypotenous
Translation
Pressure
Forces
Pythagorean Theorem
42. Two stroke- Four Stroke- Diesel-Rotary -Hybrid
Direction of Forces
Second Stroke (Diesel Engine)
Hydrostatics
Internal Combustion Engine Types
43. 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
Pressure
Rotary
2 Stroke Engine
decrease
44. Can be applied:-By direct contact: push - pull - twist -At a distance: gravity - magnetism Can change: speed - direction - shape - units of force
Second Stroke (Diesel Engine)
Open System
Units
Forces
45. Incompressible (volume doesnt change) Transmit force evenly - Lubricates - Trap contaminants - Some based on vegetable oils - Biodegradable - Aircraft fluids noncombustible (thins as temperature rises)
Hybrid
Direction of Forces
Fluids
Statics
46. Piston travels down and intake valve is opened. Intake of fuel and air into chamber
Hydrodynamics
Torque
First Stroke (4 Stroke Engine)
Mechanical Advantage
47. Applied at an angle or parallel to a surface
Moment Arm
Gravity
Shear
Third Stroke (4 Stroke Engine)
48. Length / Time
Power
Newton's First Law of Motion
Volume
Velocity
49. A movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)
Mechanics
Rotation
Tension
Pressure
50. Four Stroke Engine -Used in hotter areas because more efficient -Higher compression ratio than gasoline
Fluid
Diesel Engine
Equation for Mechanical Advantage regarding inclined planes
Moment Arm Equation
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