Do all single phase motors operate on the principal of a rotating magnetic field?

Using the image below for reference. At what percentage of rated motor speed does a typical centrifugal start switch disengage the start winding of a split-phase induction motor?

Type in your numerical value in the field provided below.

Do not use letters or special characters.

Why are some single phase motors equipped with a resilient mounting?

The following question is based on information obtained from the Wildi textbook, Chapter 16. 

Large synchronous generators have to be responsive to changes in current demand from the infinite bus. In order to maintain a stable voltage and minimize fluctuations in the alternators terminal output, utilities will use what type of exciter that will monitor voltage conditions and send control signals to increase or lower the excitation current feeding the alternator and automatically adjust the output voltage due to changing conditions.

Please select the most correct answer from the selection provided below.

The following is a digital copy of review question # 5 of Lab-Volt Lab # 35: Paralleling two alternators.

Assume that alternator A is supplying power to a load and that alternator B is to be paralleled to A. After the paralleling procedure has been completed, what must be done to permit alternator B to share the load with alternator A?

Select the most correct answer from the list provided below.

Use the following information to calculate the speed of rotation in RPM (revolutions per minute) required to produce a frequency of 50 Hz for an Australian Mining company importing Canadian generators to a remote mine site.

The generator has 4 poles, the required frequency is 50 Hz.

Use the formula found in the Delmar's textbook, Unit 32, Paragraph 32-5.

Note: Type in your numerical answer in the field below, do not use letters or special characters.

The following question is based on Lab # 35 of the Lab-Volt Manual  

When using the lamp method to synchronize an alternator in preparation to tying into the electrical grid, it is observed that all three of the lamps are continuously blinking at the same steady rate.

Is the alternator in "sync" for connection?

The following information is based information found in the Wildi Textbook, Chapter 16 

An analysis was conducted by the author that compared the relative efficiency of a generator to what physical aspect of the machine?