Today, all competitive exams are Multiple Choice Questions(MCQ) based examination system and the main factor is to answer each question in a prescribed time. So, practice as much as possible before the original test you are going to face.
Total number of Multiple Choice Question (MCQ) is 15 and time allotted for each question is 30 seconds. After the allotted time, the question will be marked as un-attempt.
QUIZ
Test Conducted by: ObjectiveBooks.org
Next Mock Tests:
01. The weight of copper of both armature and field windings decreases with _________in number of poles.
(A) Increase
(B) Decrease
(C) Either of the above
(D) None of the above
Answer: Option A
02. Which of the following loss in a D.C. generator is dissipated in the form of heat?
(A) Mechanical loss
(B) Core loss
(C) Copper loss
(D) All of the above
Answer: Option D
03. The filament of an electric bulb is made of
(A) Carbon
(B) Aluminium
(C) Tungsten
(D) Nickel
Answer: Option C
04. What will be the phase angle between two alternating waves of equal frequency, when one wave attains maximum value the other is at zero value?
(A) 0°
(B) 45°
(C) 90°
(D) 180°
Answer: Option: C
05. With an RL integrator, at the instant of the rising pulse edge,
(A) All the input voltage is across the resistor
(B) All the input voltage is across the inductor
(C) 63 percent of the input voltage is across the resistor
(D) 63 percent of the input voltage is across the inductor
Answer: Option B
06. For a certain load, the true power is 150 W and the reactive power is 125 VAR. The apparent power is
(A) 19.52 W
(B) 195.2 W
(C) 275 W
(D) 25 W
Answer: Option B
07. Eddy currents are induced in the pole shoes of a D.C. machine due to
(A) Oscillating magnetic field
(B) Pulsating magnetic flux
(C) Relative rotation between field and armature
(D) All above
Answer: Option C
08. An ideal voltage source has
(A) Zero internal resistance
(B) Open circuit voltage equal to the voltage on full load
(C) Terminal voltage in proportion to current
(D) Terminal voltage in proportion to load
Answer: Option A
09. In a split phase motor
(A) The starting winding is connected through a centrifugal switch
(B) The running winding is connected through a centrifugal switch
(C) Both starting and running windings are connected through a centrifugal switch
(D) Centrifugal switch is used to control supply voltage
Answer: Option A
10. A 4.7 MΩ resistor is in series with a 0.015 μF capacitor. The combination is across a 12 V source. How long does it take the capacitor to fully charge?
(A) 35 ms
(B) 352 ms
(C) 3.5 s
(D) 70.5 ms
Answer: Option B
11. A material for good magnetic memory should have
(A) Low hysteresis loss
(B) High permeability
(C) Low retentivity
(D) High retentivity
Answer: Option D
12. Over charging
(A) Produces excessive gassing
(B) Loosens the active material
(C) Increases the temperature resulting in buckling of plates
(D) All above
Answer: Option D
13. Which of the following motors one will choose to drive the rotary compressor?
(A) D.C. shunt motor
(B) D.C. series motor
(C) Universal motor
(D) Synchronous motor
Answer: Option D
14. If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes
(A) 0.4 ohm
(B) 0.6 ohm
(C) 0.8 ohm
(D) 1.0 ohm
Answer: Option A
15. Different generating stations use following prime movers
(A) Diesel engine
(B) Hydraulic turbine
(C) Gas turbine
(D) Any of the above
Answer: Option D
