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Following statements are given for DC motors (a) DC motors require less maintenance than AC motors (b) DC motors cannot provide high starting torque (c) DC motors are not suitable for very high-speed applications (d) The methods of speed control of DC motors are simpler and less expensive than those of AC motors Which of the following statements are correct?
Consider the following statements regarding ac drives: 1. For the same kW rating, ac motors are 20% to 40% light weight as compared to dc motors. 2. The ac motors are more expensive as compared to same kW rating dc motors. 3. The ac motors have low maintenance as compared to dc motors. Which of the above statements are correct?
Which one of the following four addresses is NOT EXACTLY same as the one given below? Cabramatta 360 Elizabeth Drive, 2170 Mount Pritchard, Australia (i) Cabramatta 360 Elizabeth Drive, 2170 Mount Pritchard, Australia (ii) Cabramatta 360 Elizabeth Drive, 2170 Mount Pritchard, Australia (iii) Cabrematta 360 Elizabeth Drive, 2170 Mount Pritchard, Australia (iv) Cabramatta 360 Elizabeth Drive, 2170 Mount Pritchard, Australia
Which one of the following four addresses is NOT EXACTLY same as the one given below?  Kedrick Shaw 72 Glenwood Drive, Thornton, NSW 2322, Australia (i)  Kedrick Shaw  72 Glenwood Drive,  Thornton, NSW 2322, Australia (ii) Kedrick Shaw  72 Glenwood Drive,  Thornton, NSW 2322, Australia (iii) Kedrick Shaw  72 Glenwood Drive,  Thornton, NSW 2322, Australia (iv) Kedrick Shaw  72 Glemwood Drive,  Thornton, NSW 2322, Australia
Which of the following statements are correct for synchronous motors? 1. Synchronous motors are well-suited for direct connection top reciprocating compressors. 2. Over-excited synchronous motors are most commonly used for power factor improvement. 3. Synchronous motors are generally used for current regulation of long transmission lines Select the correct answer using the code given below.
Which of the following motors can be used to drive the rotary compressor?
Arrange the following options in logical order. 1. Select the size range to which the file has to be compressed. 2. Search in google for online pdf size compressor sites. 3. Now press on the compressor button. 4. Choose and upload the file into the compressor site. 5. Download the file after compression.
You are about to install a second IDE hard drive in a PC that has only one IDE adapter. Your first hard drive will still be the boot drive. How should the second drive be configured?
Which of the following option is true about rotary tables? Statement 1: Index is not used with optical rotary table. Statement 2: Accurate worm and gear rotary table can be used with an index plate.
Two statements are given, followed by two conclusions numbered I and II. Assuming the statements to be true, even if they seem to be at variance with commonly know facts, decide which of the conclusions logically follow(s) from the statements. Statements: All wires are motors. All motors are pumps. Conclusions: i. All wires are pumps. ii. Some motors are wires.