Engineering Design
Construction Technologies
Fluid Systems
Electrical Systems
Thermal Systems
100
What are the 8 steps of the engineering design process?
identify the problem, research the problem, develop possible solutions, select the best possible solution(s), construct prototypes and/or models, test and evaluate, communicate the solutions, and redesign
100
What does the r-value of a material tell us about that material?
Its resistance to heat flow
100
What is the difference between an open system and a closed system?
Open - interacts with the environment. Closed - does not interact with the environment.
100
What kind of current comes out of a wall outlet?
Alternating Current
100
Heat is lost from a building by conduction. Which material would be best to help prevent heat loss from a 4.5 in. thick wall? One with a high r-value or one with a low r-value.
high r-value
200
A block has a width of 24 in. The width of a drawing of that block is 1.5 in. What is the scale used in this drawing?
1:16
200
What is the difference between zoning laws and building codes?
zoning laws - where things can be built building codes - how things can be built
200
What kind of fluid can be used in a hydraulic system and what kind of fluid can be used in a pneumatic system?
Hydraulic - liquids Pneumatics - gases
200
What is the purpose of a fuse or a circuit breaker?
to protect electrical circuits from overloads or short-circuits.
200
An architect is designing a house to be built in Maine. How can the arcitect maximize both passive solar heating and the amount of natural light inside the house?
a large number of south-facing windows
300
How many views are usually necessary in order to describe an object using an orthographic projection?
2 or 3
300
Explain Bernoulli's principle.
As velocity increases pressure decreases, and as velocity decreases pressure increases.
300
In a hydraulic system, an input piston has an area of 10 sq. in. and has a force of 20 lbs placed on it. The output piston has an area of 50 sq. in. What is the output force?
100 lbs.
300
A circuit has 36 volts running through a resistor with 6 ohms of resistance. What is the current? (Include units)
6 Amps
300
Where is the best place to put a thermostat in a room?
an interior wall, away from windows and heat sources
400
A scale drawing of a rectangular storage tank has a scale of 1 centimeter equals zero point five meters. The dimensions of the tank on the drawing are twenty four centimeters by thirty two centimeters by twenty centimeters. What are the dimensions of the actual storage tank?
12 x 16 x10
400
There are 3 desks and 7 chairs in a room. Each chair weighs 5 pounds and each desk weighs 25 pounds. What is the live load in the room?
110 lbs
400
Explain how changes to the size of a pipe effect the velocity of a liquid moving through it.
increasing pipe size - slower liquid decreasing pipe size - faster liquid
400
Identify the instruments used to measure voltage, current, and resistance.
voltage - voltmeter current - ammeter resistance - ohmmeter
400
Provide one example of a non-renewable energy source and one example of a renewable energy source.
Non-renewable - any petroleum based source, uranium Renewable - solar, wind, geothermal
500
Advances in military technologies have often led to the development of everyday applications. Early radar systems operators noticed that objects near the radar were often heated when the radar was in use. This observation led to the development of what everyday applications?
microwave ovens
500
Explain tension, compression, shear, and torsion.
tension - pulling apart compression - pushing together shear - pushing in opposite directions torsion - twisting
500
A pipe has a 45º elbow and a 90º elbow. Where is resistance greatest?
90º elbow
500
How does the temperature of a wire affect the resistance in the wire?
Higher temperature = higher resistance lower temperature = lower resistance
500
What is the difference between conduction, convection, and radiation?
conduction - heat transfer via direct contact convection - heat transfer via gases or liquids radiation - heat transfer via electromagnetic waves
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