E-10 Final SJSU questions and
answers
A 1000 kg car is capable of accelerating from 0 to 100 meter/second in 10 seconds.
Among the following choices, which is the lowest possible power rating of the car's
engine?✔✔500kW
A bumper switch is mounted to a robot. The bumper switch is connected to digital
input port #2. The right wheel is attached to motor port 2 and the left wheel is
attached to motor port 3. The following program is used to control this robot.
bumper = GetDigitalInput(2);
SetPWM(2,50);
SetPWM(3,-50);
while (1== 1)
{ if (bumper ==0)
{ SetPWM(2,-50);
SetPWM(3,50); }
}✔✔The robot will move backward forever regardless if the bumper hit something or
not.
A current of 4 Amps is flowing through a 2Ω resistor. How much power is dissipated
by the resistor?
4W
16W
32W
8W
2W✔✔32W
A current of 4 Amps is flowing through a 2Ω resistor. How much power is dissipated
by the resistor?
16W
32W
8W
4W
2W✔✔32W
A Joule equals
N-m/sec
Watt/sec
Watt/sec^2
Kg-m
N-m✔✔N-m
, A kilowatt-hour is a unit of power.
True
False✔✔False
A small wind turbine with 0.15 m blade is able to generate 2.5 volt while supplying 2
Amp of current at a wind speed of 10 meter/second. Which of the following numbers
is closest to the efficiency of this turbine at this operating condition? (Hint: "Betz limit"
sets the maximum possible efficient to 59%).
35%
50%
5%
42%
20%✔✔
A small wind turbine with 0.15 m blade is able to generate 2.5 volt while supplying 2
Amp of current at a wind speed of 10 meter/second. Which of the following numbers
is closest to the efficiency of this turbine at this operating condition? (Hint: "Betz limit"
sets the maximum possible efficient to 59%).✔✔20%
A student lifts a weight (W) using a motor powered by solar cells to determine the
efficiency of the solar cell/motor system. On the power meter the voltage reads V
and the current reads I. The student lifts the weight a distance H in a time T. What is
the output power of this system?✔✔W*H/T
A student performed an experiment to determine the relationship between speed and
fuel economy (mpg). Excel created the plot shown below using the "chart wizard".
What would you do to improve this plot?
Check all answers that apply.
Delete the plot legend because there is only one set of data
Add a label to the x axis
Add a label to the y axis
Modify the plot title so it more clearly explains what is in the plot✔✔Delete the plot
legend because there is only one set of data
Add a label to the x axis
Add a label to the y axis
Modify the plot title so it more clearly explains what is in the plot
A student performed an experiment to determine the relationship between speed and
fuel economy (mpg). Which of the plots should the student choose from the "Insert
Chart" menu to best display mileage as a function of speed?✔✔X Y (Scatter)
A student weighs 140 lb. This student is able to run up to the 3rd floor in 20 seconds.
The 3rd floor is 10 meters above the ground floor.
answers
A 1000 kg car is capable of accelerating from 0 to 100 meter/second in 10 seconds.
Among the following choices, which is the lowest possible power rating of the car's
engine?✔✔500kW
A bumper switch is mounted to a robot. The bumper switch is connected to digital
input port #2. The right wheel is attached to motor port 2 and the left wheel is
attached to motor port 3. The following program is used to control this robot.
bumper = GetDigitalInput(2);
SetPWM(2,50);
SetPWM(3,-50);
while (1== 1)
{ if (bumper ==0)
{ SetPWM(2,-50);
SetPWM(3,50); }
}✔✔The robot will move backward forever regardless if the bumper hit something or
not.
A current of 4 Amps is flowing through a 2Ω resistor. How much power is dissipated
by the resistor?
4W
16W
32W
8W
2W✔✔32W
A current of 4 Amps is flowing through a 2Ω resistor. How much power is dissipated
by the resistor?
16W
32W
8W
4W
2W✔✔32W
A Joule equals
N-m/sec
Watt/sec
Watt/sec^2
Kg-m
N-m✔✔N-m
, A kilowatt-hour is a unit of power.
True
False✔✔False
A small wind turbine with 0.15 m blade is able to generate 2.5 volt while supplying 2
Amp of current at a wind speed of 10 meter/second. Which of the following numbers
is closest to the efficiency of this turbine at this operating condition? (Hint: "Betz limit"
sets the maximum possible efficient to 59%).
35%
50%
5%
42%
20%✔✔
A small wind turbine with 0.15 m blade is able to generate 2.5 volt while supplying 2
Amp of current at a wind speed of 10 meter/second. Which of the following numbers
is closest to the efficiency of this turbine at this operating condition? (Hint: "Betz limit"
sets the maximum possible efficient to 59%).✔✔20%
A student lifts a weight (W) using a motor powered by solar cells to determine the
efficiency of the solar cell/motor system. On the power meter the voltage reads V
and the current reads I. The student lifts the weight a distance H in a time T. What is
the output power of this system?✔✔W*H/T
A student performed an experiment to determine the relationship between speed and
fuel economy (mpg). Excel created the plot shown below using the "chart wizard".
What would you do to improve this plot?
Check all answers that apply.
Delete the plot legend because there is only one set of data
Add a label to the x axis
Add a label to the y axis
Modify the plot title so it more clearly explains what is in the plot✔✔Delete the plot
legend because there is only one set of data
Add a label to the x axis
Add a label to the y axis
Modify the plot title so it more clearly explains what is in the plot
A student performed an experiment to determine the relationship between speed and
fuel economy (mpg). Which of the plots should the student choose from the "Insert
Chart" menu to best display mileage as a function of speed?✔✔X Y (Scatter)
A student weighs 140 lb. This student is able to run up to the 3rd floor in 20 seconds.
The 3rd floor is 10 meters above the ground floor.
