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 ferrite core has less eddy current loss than an iron core because
(A) Ferrites have high resistance
(B) Ferrites are magnetic
(C) Ferrites have low permeability
(D) Ferrites have high hysteresis
Answer: Option D
02. For a D.C. machines laboratory following type of D.C. supply will be suitable
(A) Rotary converter
(B) Mercury are rectifier
(C) Induction motor D.C. generator set
(D) Synchronous motor D.C. generator set
Answer: Option C
03. In a highly capacitive circuit the
(A) Apparent power is equal to the actual power
(B) Reactive power is more than the apparent power
(C) Reactive power is more than the actual power
(D) Actual power is more than its reactive power
Answer: Option: C
04. Edward's air pump
(A) Removes air and also vapour from condenser
(B) Removes only air from condenser
(C) Removes only uncondensed vapour from condenser
(D) Removes air along with vapour and also the condensed water from condenser
Answer: Option D
05. Short circuiting of a cell may be caused
(A) Buckling of plates
(B) Faulty separators
(C) Lead particles forming circuit between positive and negative plates
(D) Any one of above
Answer: Option D
06. The initial response when the output is not equal to input is called
(A) Transient response
(B) Error response
(C) Dynamic response
(D) Either of the above
Answer: Option A
07. The size of a synchronous motor decreases with the increase in
(A) Flux density
(B) Horse power rating
(C) Speed
(D) All of the above
Answer: Option A
08. Which of the following relays is used on long transmission lines?
(A) Impedance relay
(B) Mho's relay
(C) Reactance relay
(D) None of the above
Answer: Option B
09. It is advisable to avoid line-starting of induction motor and use starter because
(A) Motor takes five to seven times its full load current
(B) It will pickup very high speed and may go out of step
(C) It will run in reverse direction
(D) Starting torque is very high
Answer: Option A
10. The average half-cycle value of a sine wave with a 40 V peak is
(A) 25.48 V
(B) 6.37 V
(C) 14.14 V
(D) 50.96 V
Answer: Option A
11. The internal resistance of a 30,000 ohm/volt voltmeter set on its 50 V range is
(A) 15,000 Ω
(B) 150,000 Ω
(C) 1,500,000 Ω
(D) 15,000,000 Ω
Answer: Option C
12. When both the inductance and resistance of a coil are doubled the value of
(A) Time constant remains unchanged
(B) Initial rate of rise of current is doubled
(C) Final steady current is doubled
(D) Time constant is halved
Answer: Option A
13. In applying the superposition theorem,
(A) The sources are considered one at a time with all others replaced by their internal impedance
(B) All sources are considered independently
(C) All sources are considered simultaneously
(D) The sources are considered one at a time with all others replaced by their internal resistance
Answer: Option A
14. The relative permeability is less than unity is case of
(A) Ferromagnetic materials
(B) Ferrites
(C) Nonferrous materials
(D) Diamagnetic materials
Answer: Option D
15. A steam power station requires space
(A) Equal to diesel power station
(B) More than diesel power station
(C) Less than diesel power station
(D) None of the above
Answer: Option B
