Title: M2L3 Quiz
Course: WIND 100WH Introduction to Wind Energy > Section: WIND 100WH Introduction to Wind Energy

Q: When dealing with a control loop, the set-point is the value the system’s actions are based around.
- True
- False
A: True

Q: In smaller applications, a mechanical system changes the pitch of the blades using springs to detect high centrifugal forces when the
blade over speeds. When wind is strongest, the springs expand or contract, which allows the blades to be pitched and slow down.
- True
- False
A: True

Q: With passive pitch control, also called passive stall control, the blades are allowed to pivot on the hub.
- True
- False
A: False

Q: In active stall control, the pitch of the turbine blade is changed to a point at which airfoil activity on the blade no longer stalls in high
winds.
- True
- False
A: False

Q: Within a _____ loop system, sensors are used to find the relative position, motion, temperature, and/or speed of devices
controlled within the loop.

Q: The set-point and feedback signals are compared in a ___________ junction or comparator.
- summing
- timing
- comparing
- detecting
A: summing

Q: _____ control systems are capable of controlling the motion of devices in very small, linear steps.
- incremental
- sequential
- proportional
- collinear
A: collinear

Q: A blade is 26 meters in length, how many feet is this? (3.28 feet = 1 meter)
- 85.3 feet
- 16.7 feet
- 7.9 feet
- 125.5 feet
A: 85.3 feet

Q: How many 12-foot tubes are needed to make a run of 32 feet?
- 14
- 6
- 3
- 2
A: 3

Q: Which of the following is NOT equal to 16MW – 5MW?
- 11MW
- 11,000,000W
- 110,000W
- 11,000kW
A: 110,000W

Q: How many watts are 100kW?
- 100,000
- 500
- 10 to the 10th degree
- 10,000
A: 100,000

Q: Which of these shows the correct engineering notation for 0.019?

A) 19 x 10^-6

B) 19 x 10^6

C) 19 x 10^-3

D) 19 x 10^3
- A
- B
- C
- D
A: C

Q: Which of these shows the correct engineering notation for 2,400,000?

A) 2.4 x 10^6

B) 24 x 10^9

C) 240 x 10^7

D) 2.4M
- A
- B
- C
- D
A: A

Q: 1,700 volts could be written as _____.
- 1,700A
- 1,700kV
- 1.7kV
- 1,700MV
A: 1.7kV

Q: The Betz limit states that no more than _____ of the wind’s kinetic energy can be harnessed by any wind turbine.
- 16/27
- 40%
- 59 Joules
- .59 Newton
A: 16/27