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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. 1. Magnitude: size - a numberi.e. 50 mph 2. Direction: angle i.e. N -E -W -S
Forces and Vectors
Metrology
Applied Brakes
Volume
2. (pi) x (radius)^2
System International (SI)
More than one force
Rotary
Area of a circle equation
3. Result of gravity acting on mass -The greater the mass - the greater the weight -Is a force -Units: lbs - N
System
more than one force
US Customary
Weight
4. Intake of fuel and air mixture - compression of mixture by piston
Law of Conservation of Mass
more than one force
First Stroke (2 Stroke Engine)
Newton's Third Law
5. Allows comparison between different measuring systems and units - Necessary to market internationally
System International (SI)
Conversions
Mass
If the force is applied away from the center of rotation
6. 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
Acceleration
System International (SI)
Moment Arm Equation
7. 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
Steam Engine
Rotary
Applied Brakes
Fluid Power
8. When the moving fluid is a gas
Machine
Mechanical Advantage
Aerodynamics
Temperature
9. A combination of components
Gravity
System
Engineers and scientists need a common language
Area Equation
10. Rotation may occur
Force Equation
If the force is applied away from the center of rotation
System International (SI)
US Customary
11. Force x Distance
Fluid
Closed System
Third Stroke (rotary)
Moment Arm Equation
12. When two parallel forces equal in magnitude and opposite direction - i.e. steering wheel - turn a know - turn on and off a faucet
Steam Engine
Base Dimensions
Couple
Area of a circle equation
13. An indication of kinetic energy of mass at the molecular level
Pressure Equation
Work
Shear
Temperature
14. Mechanics is an application of math that describes how forces affect a body
Work
Mechanics
First Stroke (4 Stroke Engine)
Forces
15. When the sum of all forces and the sum of all moments both equal forces - No movement
Acceleration
Diesel Engine
Mass
Equilibrium
16. Causes acceleration -Units: USA: 32.2 ft/s^2 SI: 9.8 m/sec^2
Units
Weight
Pythagorean Theorem
Gravity
17. When the fluid is in motion
4 Stroke Engine
Hydrodynamics
Hydrostatics
Gravity
18. A^2+b^2=c^2
Pythagorean Theorem Equation
Dynamics
Moment Arm Equation
Pressure
19. 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
Couple
Mechanical Engineering
US Customary
Power Equation
20. Describes how applied forces bring a body into rest or equilibrium
Fluid Power
Statics
Mechanics describe how forces affect a body
Second Stroke (2 Stroke Engine)
21. 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
Area
First Stroke (2 Stroke Engine)
4 Stroke Engine
Forces and Vectors
22. 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
Pascal's Principle
Engineers and scientists need a common language
Mechanical Engineering
More than one force
23. 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
Volume
Internal Combustion Engine Types
Statics
Mechanical Advantage
24. Psi - newtons - pascals
If the force is applied away from the center of rotation
Machine
Law of Conservation of Mass
Units for Pressure
25. Piston travels down and intake valve is opened. Intake of fuel and air into chamber
Pascal's Principle
4 Stroke Engine
Third Stroke (rotary)
First Stroke (4 Stroke Engine)
26. Combustion of fuel mixture ignited by spark plug
Moment Arm
Metrology
Second Stroke (2 Stroke Engine)
Third Stroke (rotary)
27. Body at rest or is in equilibrium (wall)
Mechanics
Static
Dimension
Fourth Stroke (Diesel Engine)
28. 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
Mass
Metrology
Statics
Force lets us do work on a system
29. 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
Third Stroke (rotary)
Static
Second Stroke (4 Stroke Engine)
Vectors
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.
Diesel Engine
Forces and Vectors
2 Stroke Engine
First Stroke (2 Stroke Engine)
31. Can be applied:-By direct contact: push - pull - twist -At a distance: gravity - magnetism Can change: speed - direction - shape - units of force
If the force is applied at the center of the rotation
Fourth Stroke (4 Stroke Engine)
Hydrostatics
Forces
32. Exhaust
Fourth Stroke (4 Stroke Engine)
Fourth Stroke (Diesel Engine)
First Stroke (4 Stroke Engine)
Conversions
33. Static - Dynamic
Fluids
Power Equation
Mechanics describe how forces affect a body
Mechanics
34. A change in velocity over time -Unites: USA- ft/s^2 and SI: m/s^2
Acceleration
Law of Conservation of Mass
Third Stroke (4 Stroke Engine)
Dimension
35. Compression of fuel mix
Force lets us do work on a system
Forces
Second Stroke (rotary)
Newton's Second Law
36. Derived from - or composed of - base dimensions i.e. Area (length x width) - Weight (mass x acceleration) - velocity (length/time)
Inclined Plane
no movement
Derived Dimension
Statics
37. When a simple machine increases a force it is at the expense of a ____ in the distance the load is moved
decrease
Component
Force Equation
Moment Arm Equation
38. Body in motion (car)
Dynamics
Conversions
Newton's Third Law
Velocity
39. Length x Width x Height
no movement
Newton's Second Law
Volume
Temperature
40. Force/Area
Pressure Equation
System
Temperature
Power
41. What we are studying
Compression
System
Velocity
Fluid
42. Intake of fuel and air mix
Metrology
2 Stroke Engine
First Stroke (rotary)
US Customary
43. 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
Pascal's Principle
Hybrid
no movement
Pythagorean Theorem Equation
44. Modern Technology- More efficient-Better Cooling-Easier to service- longer life - lither weight- More expensive
Work
Area of a circle equation
System
Disc Breaks
45. A small piece that makes up a larger whole. Each component is there for a specific job - but the sum of components
Component
Units
Torque
Static
46. For every action there is an equal and opposite reaction -Force -F=mg -Earth exerts a force on all of us
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47. Both engines drive wheels -ICE used for cruising -Electric motor assists with low speed for acceleration and hill climbing
Velocity
Moment Arm
Hybrid Parallel
Aerodynamics
48. Energy may enter or leave. No mass enters or leaves the system i.e. Closed water bottle - car engine - human
Closed System
Moment Arm Equation
Component
Fluid Power
49. 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
Statics
Common Brake Characteristics
Steam Engine
Torque
50. Translation (slide) -Rotate -Slide and Rotate Together
Gravity
Units
Result of Applying a force to a rigid body at rest
Hydrostatics