High Voltage Engineering MCQs Part 5

1. Large power transformers are best protected by:
   1. Station type lightning arrestors
   2. Distribution type lightning arrestors
   3. Line type lightning arrestors
   4. None of these
      • Correct answer: 1. Station type lightning arrestors
2. A capacitance-resistance circuit is used to measure the ripple voltages in d.c system. During this process the important condition which should be met is:
   1. ω CR >> 1
   2. ω CR << 1
   3. ω CR = 1
   4. ω CR = 0
      • Correct answer: 1. ω CR >> 1
3. Circuit breaker dielectric tests include:
   1. 1-minute dry withstand test
   2. 1-minute wet withstand test
   3. Impulse voltage dry withstand test
   4. All of these
   5. None of these
      • Correct answer: 4. All of these
4. The intrinsic breakdown in solids is of the order of __________ sec:
   1. 10^-4 s
   2. 10^-8 s
   3. 10^-16 s
   4. 10^-20 s
5. Large size sphere gaps are installed in:
   1. Horizontal configuration
   2. Vertical configuration
   3. Any of these
   4. None of these
      • Correct answer: 2. Vertical configuration
6. Recurrent surge generator provides the impulse voltage which has __________ magnitude and to whom the equipment should respond in a ___________ mode:
   1. Smaller, Nonlinear
   2. Smaller, Linear
   3. Larger, Nonlinear
   4. Smaller, Nonlinear
      • Correct answer: 2. Smaller, Linear
7. The criterion for determining the number of stages for maximum output voltage in Cockroft – Walton is:
   1. Frequency of input
   2. Capacitance of each stage
   3.  Required kVA
   4. None of these
      • Correct answer: 4. None of these
8. ______________ is a type of surge diverter:
   1. Rod gap
   2. Valve type of lightning arrester
   3. Protector tube
   4. All above
      • Correct answer: 4. All above
9. During their manufacturing process, the High voltage power cables are subject to bending test. The statement which correctly explains this test is:
   1. The cable is bent and piston is allowed to fall on it at a comparatively lower power
   2. Firstly voltage test is performed then entire cable is bent in zig-zag position and voltage regulation is checked during process
   3. Cable is bent around cylinder to make one turn is unwound, rewound thrice following a voltage test in start and end
   4. None of these
      1. Correct answer: 3. Cable is bent around cylinder to make one turn is unwound, rewound thrice following a voltage test in start and end

Continue reading:

• High Voltage Engineering MCQs Part 1
• High Voltage Engineering MCQs Part 2
• High Voltage Engineering MCQs Part 3
• High Voltage Engineering MCQs Part 4
• High Voltage Engineering MCQs Part 6
• High Voltage Engineering MCQs Part 7
• High Voltage Engineering MCQs Part 8
• High Voltage Engineering MCQs Part 9
• High Voltage Engineering MCQs Part 10