Sail E0 Webinar

MCQs

Total Questions : 206 | Page 3 of 21 pages
Question 21. An isolator is installed
  1.    to operate the relay of circuit breaker
  2.    as a substitute for circuit breaker
  3.    always independent of the position of circuit breaker
  4.    generally on both sides of a circuit breaker
 Discuss Question
Answer: Option D. -> generally on both sides of a circuit breaker
Question 22. Circuit breakers usually operate under
  1.    transient state of short-circuit current
  2.    sub-transient state of short-circuit current
  3.    steady state of short-circuit current
  4.    after D. C. component has ceased
 Discuss Question
Answer: Option A. -> transient state of short-circuit current
Question 23. Overheating of relay contacts or contact born out is due to
  1.    slow making and breaking of load circuit contacts
  2.    foreign matter on the contact surface
  3.    too low contact pressure
  4.    all of the above
 Discuss Question
Answer: Option D. -> all of the above
Question 24. To reduce short circuit fault currents are used.
  1.    reactors
  2.    resistors
  3.    capacitors
  4.    none of the above
 Discuss Question
Answer: Option A. -> reactors
Question 25. H.R.C. fuses provide best protection against
  1.    overload
  2.    reverse current
  3.    open-circuits
  4.    short-circuits
 Discuss Question
Answer: Option D. -> short-circuits
Question 26. D.C. shunt relays are made of
  1.    few turns of thin wire
  2.    few turns of thick wire
  3.    many turns of thin wire
  4.    many turns of thick wire
 Discuss Question
Answer: Option C. -> many turns of thin wire
Question 27. ________ relay is preferred for phase fault on short transmission line.
  1.    Induction type
  2.    Reactance
  3.    Impedance
  4.    None of the above
 Discuss Question
Answer: Option B. -> Reactance
Question 28. For the protection of power station buildings against direct strokes the requirements are
  1.    interception
  2.    interception and conduction
  3.    interception, conduction and dissipation
  4.    interception, conduction, dissipation and reflection
  5.    none of the above
 Discuss Question
Answer: Option C. -> interception, conduction and dissipation
Question 29. The main function of a fuse is to
  1.    protect the line
  2.    open the circuit
  3.    protect the appliance
  4.    prevent excessive currents
  5.    none of the above
 Discuss Question
Answer: Option D. -> prevent excessive currents
Question 30. The information to the circuit breaker under fault conditions is provided by
  1.    relay
  2.    rewirable fuse
  3.    H.R.'only
  4.    all of the above
 Discuss Question
Answer: Option A. -> relay

Latest Videos
Chapter 1 - GLOBAL STEEL SCENARIO & INDIAN STEEL INDUSTRY Part 1 : (13-04-2024) INDUSTRY AND COMPANY AWARENESS (ICA)
Direction Sense Test Part 1 Reasoning (Hindi)
Chapter 1 - RMHP / OHP / OB & BP Part 1 : (14-02-2024) GPOE
Cube & Cuboid Part 1 Reasoning (Hindi)
Data Interpretation (DI) Basic Concept Reasoning (Hindi)
Counting Figures Part 1 Counting Of Straight Lines Reasoning (Hindi)
Sail E0 free webinar Webinars
Real Numbers Part 7 Class 10 Maths
Real Numbers Part 1 Class 10 Maths
Polynomials Part 1 Class 10 Maths

Latest Test Papers

Pie Chart - Test Paper 1 Data Interpretation Reasoning & DI
Tabulation - Test Paper 2 Data Interpretation Reasoning & DI
Test Paper 1 Direction Sense Test Reasoning & DI
ICA , RDIC,GFM Free Modal Test Paper - Non - Technical Branch Old Syllabus 2022 - SAIL Junior Officer E0
GFM Combined 1 Free Revision Test SAIL JO E-0