Upgrade to remove ads
Only $35.99/year

Engineering Midterm Study LEGIT

Terms in this set (44)

What is the correct representation of Ohm's Law?
V = I * R
If you are keeping a database of planets, which information makes sense to be stored in the Read Only Memory?
Mass of the planet
Which one of following is NOT measure in Hertz?
Heat
Given that Resistance = (Resistance Length)/(Area), and the resistivity of copper = 1.7 10-8 the resistance of a 10 meter long copper wire with a uniform radius of 0.50 mm would be _____ ohms
None
Resistivity of material A is 2.44 10-8 , resistivity of material B is 1.59 10-8 and that of material C is 1.68 * 10-8 . Everything else being equal, which material would you use for wiring in your Mars Rover to conserve power?
Material B
At the 00:00 hours (beginning of the day), the power consumption meter on your Mars probe read 03679 kWh. After 24 hours (end of the day) the same meter read 03697 kWh. How many kilowatt hour energy did your probe use during this time period?
18
Voltage is an expression of ______
Potential energy
Adding three resistors of the same value in a series connection will be the _____ the value of the one resistor.
triple
Adding two resistors of the same value in a parallel connection will be the ____ the value of the one resistor.
half of
Frequency specifies the ____ and wavelength specifies the _____.
total number of complete wave cycles in one second, distance between two specific points of consecutive waves
Motors and generators are all about the relations between _____.
electricity and magnetism
What is the 'motor effect?'
electricity creating motion
Which one of the following is not an example of an analog sensor?
Bump sensor
Which of the following devices are not suitable to store students' grades?
RAM
The job of the DRAM controller is to ______.
periodically refresh the data stored in the DRAM
Context switch latency is a concern with ______.
CPU
What is Watt?
Unit to measure electric power
Appliance: Refrigerator
Number of Watts: 500 watts
Hours used per day: 24 hours
Electricity price: 15.5 cents per kWh

What is the monthly (30 days) cost to run this refrigerator?
$55.80
Old Appliance: Refrigerator
Number of Watts: 500 watts
Hours used per day: 24 hours
Electricity price: 15.5 cents per kWh

How much money would be saved every month (30 days) by replacing the old refrigerator with a new one rated at 300 watts?
$22.32
A 100 watt light bulb turned on for 5 hours would cost ____ a 500 watt refrigerator running for 2 hours. Consider the price of electricity as 15.5 cents per kWh
less than
How much load can a 10 hp motor take at 90% efficiency while drawing 10 KW electrical power?
1.2069
You have designed a windmill to generate electricity for your base station on Mars. The total change in the potential energy of the blades per second 2,500 J. It generates 72,000 J of electric output per minute. What is the calculated efficiency of the windmill?
48%
The tachometer on your Mars Rover is a _____.
speed sensor
What type of sensor gives your the angular velocity of your Mars Orbiter?
quadrature encoder
Which of the following is not an example of energy
...
The SI unit for Energy is _______.
jules
The push or pull on an object with mass to causes it to change its velocity is called _____.
force
Which of the following is not true about work?
Work is the measure of the totals force transfer while an object is moved over a distance by an external force at least part of which is applied in the direction of the displacement.
Work done on a body is equal to the ______ in the ______ of the body
increase, energy
Which one of the following is not true about Mass?
The SI unit of Mass is pounds (lbs)
Why are the needles and knives made very sharp?
To increase pressure
Why do some of the trucks have double wheels?
To reduce pressure
The pressure exerted on a floor by a 42-kg box, the bottom of which has a area of 84 square inches is ______ the force exerted on a floor by a 24-kg box, the bottom of which has an area of 48 square inches.
same as
What is energy?
ability to do work
What does the term 'average power' mean?
Total work done divided by the total time it took to get it done
Burning one kilogram of coal releases much more energy than detonating a kilogram of TNT however, why doesnt the burning of coal seem to be more powerful?
The TNT reaction releases all the energy much more quickly, it delivers far more power than coal
The scientific meaning of acceleration is ______
the rate of change of velocity
The Mars Rover does some work. So, it ______.
transferred energy
Newton's first law of motion is all about _____.
resistance to change
Newton's second law of motion is all about _______.
resistance to acceleration
Newton's third law of motion is all about ______.
reaction to an action
A flowchart should be used for ______.
all of the above
In PWM, the ______ of the career pulse is changed.
width
What would be the duty cycle of a battery power when it's turned on?
100%
Sets with similar terms