Sail E0 Webinar

MCQs

Total Questions : 109 | Page 8 of 11 pages
Question 71. The frequency of an alternating current is
  1.    The speed with which the alternator runs
  2.    The number of cycles generated in one minute
  3.    The number of waves passing through a point in one second
  4.    The number of electrons passing through a point in one second
 Discuss Question
Answer: Option C. -> The number of waves passing through a point in one second
Question 72. Ohm is unit of all of the following except
  1.    Inductive reactance
  2.    Capacitive reactance
  3.    Resistance
  4.    Capacitance
 Discuss Question
Answer: Option D. -> Capacitance
Question 73. In a loss-free R-L-C circuit the transient current is
  1.    Oscillating
  2.    Square wave
  3.    Sinusoidal
  4.    Non-oscillating
 Discuss Question
Answer: Option C. -> Sinusoidal
Question 74. Wire-wound resistors are unsuitable for use at high frequencies because they
  1.    Create more electrical noise
  2.    Are likely to melt under excessive eddy current heat
  3.    Consume more power
  4.    Exhibit unwanted inductive and capacitive effects
 Discuss Question
Answer: Option D. -> Exhibit unwanted inductive and capacitive effects
Question 75. The series and parallel resonance on L-C circuit' differs in that
  1.    Series resistance needs a low-resistance source for sharp rise in current
  2.    Series resonance needs a high-resistance source for sharp increase in current
  3.    Parallel resonance needs a low-resistance source for a sharp increase in impedance
  4.    Parallel resonance needs a low-resistance source for a sharp rise in line current
 Discuss Question
Answer: Option A. -> Series resistance needs a low-resistance source for sharp rise in current
Question 76. At very low frequencies a series R-C circuit behaves as almost purely
  1.    Resistive
  2.    Inductive
  3.    Capacitive
  4.    None of the above
 Discuss Question
Answer: Option C. -> Capacitive
Question 77. Power factor of an electrical circuit is equal to
  1.    R/Z
  2.    Cosine of phase angle difference between current and voltage
  3.    Ratio of useful current to total current Iw/I
  4.    All above
 Discuss Question
Answer: Option D. -> All above
Question 78. If two sine waves of the same frequency have a phase difference of JT radians, then
  1.    Both will reach their minimum values at the same instant
  2.    Both will reach their maximum values at the same instant
  3.    When one wave reaches its maxi¬mum value, the other will reach its minimum value
  4.    None of the above
 Discuss Question
Answer: Option C. -> When one wave reaches its maxi¬mum value, the other will reach its minimum value
Question 79. For a sine wave with peak value Imax the r.m.s. value is
  1.    0.5 Imax
  2.    0.707
  3.    0.9
  4.    1.414 Imax
 Discuss Question
Answer: Option B. -> 0.707
Question 80. The equation of 50 Hz current sine wave having r.m.s. value of 60 A is
  1.    60 sin 25 t
  2.    60 sin 50 t
  3.    84.84 sin 3141
  4.    42.42 sin 314 t
 Discuss Question
Answer: Option C. -> 84.84 sin 3141

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

DSP Combined 1 Free Revision Test SAIL JO E-0
GPOE / GPA Combined 1 Free Revision Test SAIL JO E-0
BSP Plant Specific Review Test SAIL JO E-0
BSL Combined 1 Free Revision Test SAIL JO E-0
GFM Combined 1 Free Revision Test SAIL JO E-0