SUBJECTS
|
BROWSE
|
CAREER CENTER
|
POPULAR
|
JOIN
|
LOGIN
Business Skills
|
Soft Skills
|
Basic Literacy
|
Certifications
About
|
Help
|
Privacy
|
Terms
|
Email
Search
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
Area Equation
Volume
Second Stroke (Diesel Engine)
System
2. 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
Tension
Power Equation
Statics
Inclined Plane
3. Are independent of other dimensions - They are limited in number - length - mass - time - temperature - force
Hydrostatics
Component
Diesel Engine
Base Dimensions
4. 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)
Effort
Pythagorean Theorem
Velocity
Power
5. Piston travels up and exhaust valve opens. Combustion by product exhaustion
Power Equation
Third Stroke (Diesel Engine)
Vectors
Fourth Stroke (4 Stroke Engine)
6. When the fluid is in motion
Hydrodynamics
Volume
Derived Dimension
Static
7. Force/Area
Derived Dimension
Direction of Forces
Second Stroke (rotary)
Pressure Equation
8. 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
Volume
Second Stroke (rotary)
Force Equation
Applied Brakes
9. Often a free body has _______ acting on it
Equilibrium
Shear
more than one force
no movement
10. Same pressure - work - volume - Different forces and distances
System International (SI)
Dynamics
Diesel Engine
Hydraulic Cylinders
11. Work/force or vertical distance/sloping distance
Mechanics
Open System
Rotary
Equation for Mechanical Advantage regarding inclined planes
12. Combustion ignited by spark plug and materials are compressed
Volume
Pythagorean Theorem
Third Stroke (4 Stroke Engine)
Mechanical Advantage
13. Combustion of fuel mixture ignited by spark plug
Second Stroke (2 Stroke Engine)
Couple
Fourth Stroke (4 Stroke Engine)
Second Stroke (rotary)
14. A pull on an object
Tension
Pressure
System
Weight
15. Air is drawn in
If the force is applied at the center of the rotation
First Stroke (Diesel Engine)
Rotary
Result of Applying a force to a rigid body at rest
16. 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
Tension
Vectors
More than one force
Forces and Vectors
17. Mechanics is an application of math that describes how forces affect a body
US Customary
Rotary
Pressure
Mechanics
18. The branch of science and engineering involving measurement
Pascal's Principle
Metrology
Third Stroke (Diesel Engine)
System
19. If a force causes rotations -Vector- Machines can have more than one torque-Units: foot- pound and newton - meter - i.e. engines - airplanes - propeller
Disc Breaks
First Stroke (Diesel Engine)
Gravity
Torque
20. When two parallel forces equal in magnitude and opposite direction - i.e. steering wheel - turn a know - turn on and off a faucet
Couple
Aerodynamics
First Stroke (4 Stroke Engine)
Pressure Equation
21. 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
Pythagorean Theorem
Fluids
Mechanical Advantage
Work
22. (Force)(Distance)/Seconds
US Customary
Volume
Rotation
Power Equation
23. 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
Pythagorean Theorem
System
Machine
Pressure Equation
24. Piston travels up and both plugs are closed
Fluids
Second Stroke (2 Stroke Engine)
Newton's Third Law
Second Stroke (4 Stroke Engine)
25. A movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)
Power
Effort
Conversions
Rotation
26. 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
More than one force
Mechanical Advantage
Torque
Units for Pressure
27. 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 (
Conversions
Pythagorean Theorem
Third Stroke (rotary)
System International (SI)
28. Air is compressed - work is done on the system
Pressure
System
Second Stroke (Diesel Engine)
Steam Engine
29. Can be applied:-By direct contact: push - pull - twist -At a distance: gravity - magnetism Can change: speed - direction - shape - units of force
decrease
Statics
Forces
Dynamics
30. (pi) x (radius)^2
Area of a circle equation
Translation
Fourth Stroke (Diesel Engine)
Area Equation
31. ICE generates electricity for electric battery -Electric motor turns wheels
Dimension
Equation for Mechanical Advantage regarding inclined planes
Hybrid Series
Component
32. A fluid power system uses hydraulics and a fluid under pressure to create a greater force than is applied
Vectors
Hydraulics
Fluid Power
Hybrid Parallel
33. Incompressible (volume doesnt change) Transmit force evenly - Lubricates - Trap contaminants - Some based on vegetable oils - Biodegradable - Aircraft fluids noncombustible (thins as temperature rises)
More than one force
Fluids
Hybrid
Component
34. A^2+b^2=c^2
Pythagorean Theorem Equation
If the force is applied away from the center of rotation
Translation
Moment Arm
35. Piston travels down and intake valve is opened. Intake of fuel and air into chamber
Couple
Forces and Vectors
Area Equation
First Stroke (4 Stroke Engine)
36. Varies by location (on earth) - distance (from earth) - and mass (of planet)
Pressure Equation
Gravity
Fourth Stroke (rotary)
Fourth Stroke (Diesel Engine)
37. 1. Magnitude: size - a numberi.e. 50 mph 2. Direction: angle i.e. N -E -W -S
Mechanics
System
Forces and Vectors
Work
38. Static - Dynamic
Mechanics describe how forces affect a body
Shear
Component
Newton's Second Law
39. 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
Result of Applying a force to a rigid body at rest
Rotary
Units
Fluids
40. Energy may enter or leave. Mass can enter or leave the system i.e. open water bottle - molecule - hydraulic cylinder - human
Open System
Hydrodynamics
Forces and Vectors
US Customary
41. Length / Time
Mechanics describe how forces affect a body
Gravity
Law of Conservation of Mass
Velocity
42. An indication of kinetic energy of mass at the molecular level
Pythagorean Theorem
Dimension
Temperature
Mechanical Advantage Equation
43. Intake of fuel and air mixture - compression of mixture by piston
Derived Dimension
System
First Stroke (2 Stroke Engine)
Rotation
44. When the work done by the effort exceeds the work done by the load - the load...
Pythagorean Theorem
will move
Open System
Metrology
45. What we are studying
If the force is applied at the center of the rotation
Shear
System
US Customary
46. When the sum of all forces and the sum of all moments both equal forces - No movement
Gravity
Acceleration
Equilibrium
More than one force
47. Causes acceleration -Units: USA: 32.2 ft/s^2 SI: 9.8 m/sec^2
Gravity
Steam Engine
US Customary
Units for Pressure
48. External Combustion engine -Only used in factories and plants (not used in cars)
Steam Engine
Tension
Hydrodynamics
more than one force
49. Mass can neither by created nor destroyed - only transformed
Second Stroke (Diesel Engine)
Fourth Stroke (rotary)
Law of Conservation of Mass
decrease
50. 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