SSC JE electrical Mock Test Paper 2019| MES Electrical

SSC previous year solved electrical papers / March 15, 2022

Ques.51. A spotlight of 60/π Cd is located at 4 m above the table. Also, the beam is focussed on a surface area of 0.16m2. Find the intensity of the beam

  1. 2400 cd
  2. 1000 cd
  3. 1500 cd
  4. 3400 cd

Answer.1. 2400 cd

 

Ques.52. A 288 Cd light is located at 1.2m from a tabletop of area 2 m2. Calculate the illumination

  1. 280 Lx
  2. 400 Lx
  3. 200 Lx
  4. 240 Lx

Answer.3. 200 Lx

 

Ques.53. Calculate the current through (2+j5) Ω impedance considering only the 50∠0⁰ voltage source.

  1. 8.42 ∠77.47⁰
  2. 8.42 ∠-77.47⁰
  3. 5.42 ∠77.47⁰
  4. 5.42 ∠-77.47⁰

Answer.4. 5.42 ∠-77.47⁰

 

Ques.54. In a circuit breaker, What is the condition of the arc will not restrike:

  1. Rise is greater than rise of restriking voltage then the arc will not restrike
  2. Rise is less than the rise of restriking voltage then the arc will not restrike
  3. Rise is below than rise of restriking voltage then the arc will restrike
  4. Rse is equal to rise of restriking voltage then the arc will not restrike

Answer.1. Rise is greater than rise of restriking voltage then the arc will not restrike

 

Ques.55. Which of the following statements about electric field lines associated with electric charges is false?

  1. Electric field lines can be either straight or curved. 
  2. Electric field lines form closed loops. 
  3. Electric field lines being on positive and end on negative charges. 
  4. Electric field lines do not intersect

Answer.2. Electric field lines form closed loops.

 

Ques.56. The expansion for the acronym LVDT, a transducer used for displacement measurement, is

  1. Low voltage displacement transducer.
  2. Light vision displacement transducer.
  3. Linear variable displacement transducer.
  4. Linear variable differential transformer

Answer.4. Linear variable differential transformer

 

Ques.57. Consider the following statements regarding the time constant of the system.

(i) The time constant of the system is related to the speed of response.
(ii) Smaller the time constant slower is the system response.
(iii) It is the time taken by the response to reach 98% of the final value.

 

Out of the above three statements which statement is correct?

  1. 1 is only correct
  2. 1 & 3 are correct
  3. 2 & 3 are correct
  4. 1 & 2 are correct

Answer.1. 1 is only correct

 

Ques.58. Earthing or grounding cable is:

  1. Green
  2. Yellow
  3. Grey
  4. Black

Answer.1. Green

 

Ques.59. Two identical synchronous machines having the same inertia constant are connected in parallel and swing together. The effective inertia constant is 4 MJ/MVA. Then each machine has an inertia constant of

  1. 8 MJ/MVA
  2. 4 MJ/MVA
  3. 2 MJ/MVA
  4. 1 MJ/MVA

Answer.3. 2 MJ/MVA

 

Ques.60. The depth upto which current will penetrate in the induction heating process is related to specific resistance of molten change (ρ) by

  1. ρ
  2. √ρ
  3. ρ2
  4. 1/√ρ

Answer.2. √ρ

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