MCQs

Which one of the following is the universal gate: OR gate AND gate XOR gate NAND gate Correct answer: 4. NAND gate

State Diagram and State tables are used for: Level operation analysis Pulse operation analysis Any of these None of these Correct answer: 3. Any of these

The D-flip-flop is _________ flip-flop: Digital Differential Dial type Delayed Correct answer: 4. Delayed The D-flip-flop is also known as a data or delay flip-flop

Digital computers use complemental subtraction owing to the fact that: It simplifies design It is a simple process It can handle negative numbers easily None of these Correct answer: 1. It simplifies design

Binary 111011 represents Decimal 59 Decimal 67 Decimal 78 Decimal 95 Correct answer: 1. Decimal 59 = (1 * 25) + (1 * 24) + (1 * 23) + (0 * 22) + (1 * 21) + (1 * 20) = 32 + 16 + 8 + 0 + 2 + 1 = 59 So … Read more

Binary 1000, when subtracted from binary 1111 is: 1000 111 1010 1110 Correct answer: 2. 111 Explanation: You can either perform a direct calculation or can convert binary to decimal and then perform the calculation. Method 1: 1111 – 1000 = 111 Method 2: (1111)2 = (15)10 & (1000)2 = (8)10 15 – 8 = … Read more

Generally Single-core cables are not provided with armoring in order to: Make it flexible Decrease its cost Avoid losses in armor None of these Correct answer: 3. Avoid losses in armor Explanation: Single core cables are not provided with armoring so as to avoid excessive losses due to Eddy currents.

Synchronous Motors Generally have: Salient pole rotor Non-salient pole rotor None of these Correct answer: 1. Salient pole rotor

The capacity of Synchronous capacitors is in range of: VAR kVAR MVAR GVAR Correct answer: 3. MVAR Most synchronous condensers in electrical systems are rated from 20 MVAR to 200 MVAR.

A Synchronous capacitor is used to: Reduce losses Improve power factor Inprove voltage regulation None of these All of these Correct answer: 5. All of these A synchronous capacitor is used for reducing losses, improving power factor, and voltage regulation.