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For a three phase induction motor, maximum torque is double the full load torque and starting torque is 1.6 times the full load torque. To get a full load slip of 5%, percentage reduction in the rotor resistance should be?
For the application requiring high starting torque and minimum starting current, the most suitable starting method will be?
A 3-phase induction motor has a starting torque of 200 N-m when switched on-directly to supply. If an auto-transformer with 50% tapping is used for starting, the starting torque would be
You are a developer for a XYZ Inc that provides free software over the Internet. You are developing en e-mail application that users all over the world can download. The application displays text strings in the user interface. At run time, these text strings must appear in the language that is appropriate to the locale setting of the computer running the application. You have resources to develop versions of the application for only four different cultures.You must ensure that your application will also be usable by people of other cultures.
How should you prepare the application for deployment?
A 10 kW, 400 V, 3-phase, 4-pole, 50 Hz induction motor develops the rated output at rated voltage with its slip rings shorted. The maximum torque is twice the full load torque occurs at the slip of 10% with zero external resistance in the rotor circuit. An external resistance is now tripled in the rotor circuit. Then the slip at which maximum torque occur for the same load torque is?
Which of the following distinguishes section 34 of Indian Penal Code from section 149, Indian Penal Code?
1. Section 149 creates a substantive offence whereas section 34 does not create an offence.
2. Section 149 requires common object whereas section 34 requires common intention.
3. Section 149 requires five or more persons whereas section 34 requires two or more persons.
Select the correct answer:
Which of the following load application normally needs starting torque more than the rated torque?
If a particular application needs high speed and high starting torque, then which of the following motor will bepreferred ?
If an application needs high speed and high starting torque, then which of the following motor will be preferred?
Consider the following statements: 1. A synchronous motor has no starting torque but when started it always runs at a fixed speed. 2. A single-phase reluctance motor is not self-starting even if path for eddy currents are provided in the rotor 3. A single-phase hysteresis motor is self-starting Which of these statement(s) is/are correct?