Three phase motors - Study guides, Class notes & Summaries

A flare produces illumination using a chemical reaction that moves at subsonic speeds (slower than the speed of sound). What term applies to this reaction? - Correct answerC Stability refers to an A&E item's potential to - Correct answer-Deterioration of A&E during storage; factors affecting stability are time, temperature, and moisture Which explosive train propels (launches) the projectile? - Correct answer-B A pyrotechnic is an example of a low explosive because it - Correct answer-A A...

NCCER Examination Prep Set Questions Revised With Correct Answers < Updated & Already Passed > A UL listed rod type grounding electrode must have a MINIMUM length of? - ANSWER : 8' What is the MINIMUM number of overload sensing units required for all three phase motors? - ANSWER : 3 In a circuit of pure capacitance, the current leads the voltage by an angle of? - ANSWER : 90 degrees The standard unit for measuring the cross sectional area of wire is the? - ANSWER ...

INDUCTION MOTORS EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED The type of the motor that does not have a commutator is the A. repulsion motor B. induction motor C. dc shunt motor D. ac series motor B. induction motor A certain motor is driven by a 1750 rpm dc shunt motor. If the power supply is to be changed to three phase, 50 cycles ac, the most suitable replacement motor would be A. synchronous motor B. capacitor motor C. ac commutator motor D. squirrel cage ind...

The maximum allowable voltage drop between the generator and the bus bar is A. 1 percent of the regulated voltage. B. 2 percent of the regulated voltage. C. less than the voltage drop permitted between the battery and the bus bar. - correct answer 2 percent of the regulated voltage. The maximum allowable voltage drop between the generator and the bus bar is 2% of the regulated voltage of the generator. What are two types of ac motors that are used to produce a relatively high torque?...

NCCER Test Questions and Answers 100% Pass | Latest 2024/2025. A UL listed rod type ground electrode must have minimum length of 8'' in a circuit of pure capacitance, the current leads the voltage by 90 degrees The standard unit for measuring the cross sectional area of wire is the circular mil the drawing scale is most likely to be found in the drawing title block what is the minimum number of overload sensing units required for all three phase motors 3 what is the resultant distance bet...

For a given number of poles, which of the following determines the speed of an AC motor? Frequency The terminals of a motor can be identified using a battery and a(n) _____. voltmeter The stationary magnet of a DC motor is represented by the ______. field poles Any exposed live parts must be guarded if they are operating at ______. 50V or more between terminals The synchronous speed at which a four-pole, 60Hz induction motor operates is _____. 1,800rpm In ...

ABYC AEMC Chapter 3 Three Phase with Complete Solutions(Rated A+) Compared to traditional US power sources, _____ delivers three times the power with only 1.5 times the conductor material. - ANSWER-three-phase power In a delta configuration, the phase voltage is _____ the line voltage - ANSWER-equal to Three-phase power ______ than single-phase power - ANSWER-is more efficient Proper overcurrent protection for a three-phase motor requires - ANSWER-a triple-pole breaker Three-ph...

NCCER Test Questions and Answers 100% Pass (Latest ) A UL listed rod type ground electrode must have minimum length of 8'' in a circuit of pure capacitance, the current leads the voltage by 90 degrees The standard unit for measuring the cross sectional area of wire is the circular mil the drawing scale is most likely to be found in the drawing title block what is the minimum number of overload sensing units required for all three phase motors 3 what is the resultant distance between cente...

Power Engineering 4a - Unit 8 – Electro technology Questions and Answers Graded A+ When using Fleming's Left Hand Rule, the index finger represents A) generator action flux direction. B) motor action motion direction. C) generator conductor motion direction. D) motor action flux direction. E) motor action direction of current flow. D A basic law of electricity is, unlike charges attract each other and like charges A) impact each other. B) hold each other. C) attract each oth...

Z-51 Written Exam Questions and Complete Solutions In a steam turbine, what is the function of a Kingsbury thrust bearing? A) Maintain first stage steam pressure. B) Compensate for coupling misalignment. C) Adjust shaft torque at start up. D) Maintain axial positioning of the rotor shaft. - Answer: D) Maintain axial positioning of the rotor shaft. The ratio of actual pressure of water pressure in the atmosphere to the saturated pressure of given temperature is A) partial pressure....