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.com
Next Mock Tests:
01. A synchronous machine with large air gap has
(A) A higher value of stability limit
(B) A small value of inherent regulation
(C) A higher synchronizing power which makes the machine less sensitive to load variations
(D) All of the above
Answer: Option D
02. When the north poles of two bar magnets are brought close together, there will be
(A) No force
(B) A downward force
(C) A force of attraction
(D) A force of repulsion
Answer: Option D
03. All the voltage drops and the source voltage added together in a series circuit is equal to
(A) The total of the voltage drops
(B) The source voltage
(C) Zero
(D) The total of the source voltage and the voltage drops
Answer: Option C
04. The winding resistance of a coil can be increased by
(A) Increasing the number of turns
(B) Using a thinner wire
(C) Changing the core material
(D) Increasing the number of turns or using thinner wire
Answer: Option D
05. The speed of a squirrel-cage induction motor can be controlled by all of the following except
(A) Changing supply frequency
(B) Changing number of poles
(C) Changing winding resistance
(D) Reducing supply voltage
Answer: Option C
06. The voltage drop, for constant voltage transmission is compensated by installing
(A) Inductors
(B) Capacitors
(C) Synchronous motors
(D) All of above
Answer: Option C
07. In a pure capacitive circuit if the supply frequency is reduced to 1/2, the current will
(A) Be reduced by half
(B) Be doubled
(C) Be four times at high
(D) Be reduced to one fourth
Answer: Option: A
08. For the same peak value which of the following wave will 'have the highest r.m.s. value?
(A) Square wave
(B) Half wave rectified sine wave
(C) Triangular wave
(D) Sine wave
Answer: Option: A
09. The speed of a synchronous motor
(A) Increases as the load increases
(B) Decreases as the load decreases
(C) Always remains constant
(D) None of the above
Answer: Option C
10. In assigning the direction of branch currents,
(A) The directions are critical
(B) The directions are not critical
(C) They must point into a node
(D) They must point out of a node
Answer: Option B
11. Method which is commonly applied for unloading the coal for small power plant is
(A) Lift trucks
(B) Coal accelerators
(C) Tower cranes
(D) Belt conveyor
Answer: Option B
12. When one of three series resistors is removed from a circuit and the circuit is reconnected, the current
(A) Increases
(B) Increases by one-third
(C) Decreases by one-third
(D) Decreases by the amount of current through the removed resistor
Answer: Option A
13. In a parallel R-C circuit, the current always _________the applied voltage
(A) Lags
(B) Leads
(C) Remains in phase with
(D) None of the above
Answer: Option: B
14. Which capacitor will be physically smaller for the same ratings?
(A) Ceramic capacitor
(B) Paper capacitor
(C) Both will be of equal size
(D) None of the above
Answer: Option A
15. The maximum power developed in a synchronous motor will depend on
(A) The rotor excitation only
(B) The supply voltage only
(C) The rotor excitation and supply voltage both
(D) The rotor excitation, supply voltage and maximum value of coupling angle (90°)
Answer: Option D
