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Electrical Question Answers Competitive Exams Online MCQ

Electrical Engineering MCQ Questions Answers for competitive exams: This mock test having 25 question each, with four choices. On each click on answers system will tell you where the answers is correct or incorrect. You can view this Electrical Engineering test question details at the end of the quiz.

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Electrical Question Answers Competitive Exams

This Electrical questions answers are applicable for any kind of entrance exam or job related exam especially for P.O. GATE, IIT JAM and other placement examination. You practice as much as you can so gather knowledge of how to answers Electrical Engineering critical type papers in short time and this can be a big factor for cracking any exam.



Electrical Engineering (EE)

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Question 1
In an RC-coupled Common Emitter amplifier, which of the following is true?
A
Coupling capacitance affects the h1 response and bypass capacitance affects the 1 response
B
Both coupling and bypass capacitances affect the l1rsponse only
C
Both coupling and bypass capacitances affect the h, response only
D
Coupling capacitance affects the I, response arid the bypass capacitance affects the h1 response.
Question 2
If the HLT instruction of a 8085 microprocessor is executed,
A
the microprocessor disconnected from the system bus till the Reset is pressed
B
the microprocessor enters into a Halt state the buses are tri-stated
C
the microprocessor halts execution of the program and returns to monitor
D
the microprocessor reloads the program from the location 0024 and 0025 H
Question 3
A resistance is measured by the voltmeter ammeter method empIoying d.c. excitation and voltmeter of very high resistance connected directly across the unknown resistance. If the voltmeter and ammeter readings are subject to maximum possible error of 2.4% and 1.0% respectively, then the magnitude of the maximum possible percentage error in the value of resistance deduced from the measurement is nearly
A
1.4%
B
1.7%
C
2.4%
D
3.4%
Question 4
The number of comparators needed in a parallel conversion type 8-bit A to D converter is
A
8
B
16
C
255
D
256
Question 5
Two transformers of the same type, using the same grade of iron and conductor materials, are designed to work at the same flux and current densities; but the linear dimensions of one are two tines those of the other in all respects. The ratio of kVA of the two transformers closely equals
A
16
B
8
C
4
D
4
Question 6
The torque angle of a synchronous machine operating from a constant voltage hush, is usually defined as the space angle between
A
Rotor mmf wave and stator mmf wave
B
Rotor mmf wave and resultant flux density wave
C
Stator mmf wave and resultant flux density wave
D
Stator mmf wave and resultant mmf wave
Question 7
An idea OPAMP is used to make an inverting amplifier. The two input terminals of the OPAMP are at the same potential because
A
the Iwo input terminals are directly shorted internally
B
the input impedance of the OPAMP is infinity
C
the open loop gain of the OPAMP is infinity
D
CMRR infinity
Question 8
The developed electromagnetic force and/or torque in electro-mechanical energy conversion systems act in a direction that lends
A
to increase the stored energy at constant mmf
B
to decrease the stored energy it constant flux
C
to decrease the co-energy at constant mmf
D
to decrease the stored energy at constant mmf
Question 9
The inductance of a power transmission line increases with
A
decrease in line length
B
increase in diameter of conductor
C
increase in spacing between the phase conductors
D
increasc in load current carried by the conductors
Question 10
The selection of size of conductors for a distritbutor in a distribution system is governed by
A
corona loss
B
temperature rise
C
radio interference
D
voltage drop
Question 11
A Buchholz relay is used for
A
protection of a transformer against all internal faults
B
protection of a transformer against external faults
C
protection of a transformer against both internal and external faults
D
protection of induction motors
Question 12
SignaI flow graph is used to obtain the
A
stability of a system
B
transfer function of system
C
controIIablity of a system
D
observability of a system
Question 13
A 10 bit AID converter is used to digitize an analog signal in the 0 to 5 V range. The maximum peak to peak ripple voltage that can be allowed in the D.C. supply voltage is
A
Nearly 100 mV
B
nearly 50 mV
C
Nearly 25 mV
D
nearly 5.0 mV
Question 14
Three devices A, B and C have to be connected to a 808 microprocessor. Device A has highest priority and device C has the lowest priority. In this contest which of the following is correct assignment of interrupt inputs?
A
A uses TRAP, B uses RST 5.5 and C uses RST 6.5
B
A uses RST 7.5, B uses RST 6.3 and C uses RST 5.5
C
A uses RST 5.5, B uses RST 6.5 and C uses RST 7.5
D
A uses RST 5.5, B uses RST 6.5 and C uses TRA P
Question 15
A CR0 screen has ten divisions on the horizontal scale. If a voltage signal 5 sin (314 t + 4 ) is examined with a line base setting of 5 msec/div, the number of cycles of signal displayed on the screen will be
A
0.5 cycles
B
2.5 cycles
C
5 cycles
D
10 cycles
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