Question 1
An alternator is said to be over excited when it is operating at:
Correct Answer : c
Selected Answer : a
Explanation : "An alternator is considered overexcited when the back emf voltage has a greater magnitude than the terminal voltage. Over excitation is characterized by positive reactive power flow out of the generator terminals. The excitation is controlled by the current flowing in the field winding. As the excitation is increased, the armature current will have a phase angle that increases in the lagging direction. "
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Question 2
A synchronous motor is said to be over excited when it is operating at:
Correct Answer : b
Selected Answer : b
Explanation : If DC field excitation of a synchronous motor is such that back EMF Eb is greater than applied voltage V, then the motor is said to be over-excited. An over-excited synchronous motor draws leading current. Therefore, if the field of the synchronous motor is overexcited then its power factor will be leading.
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Question 3
A micro antenna is:
Correct Answer : a
Selected Answer : a
Explanation : An micro antenna is an antennas for a variety of services to be integrated into one single module. Hence it is an integrated antenna
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Question 4
What is primary use for fast track scheduling:
Correct Answer : d
Selected Answer : c
Explanation : Fast-tracking is a technique where activities that would have been performed sequentially using the original schedule are performed in parallel. In other words, fast tracking a project means the activities are worked on simultaneously instead of waiting for each piece to be completed separately. Hence it guarantee project cost prior to the start of building
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Question 5
The direction of the force acting on a moving charge place in a magnetic field is:
Correct Answer : a
Selected Answer : a
Explanation : uploads/Question_Image/5Elec5e.PNG
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Question 6
The unit of conductance is:
Correct Answer : d
Selected Answer : d
Explanation : Conductance is the inverse of resistance (Ohm) so the inverse unit is mho
Explanation :  so the inverse unit is mho)
Question 7
For the circuit shown phase shift of the transfer function V/Vo at very high frequencies is:
Correct Answer : a
Selected Answer : a
Explanation : At high frequency, the value of Capacitance reactance Xc is very low and has very low impact and the inductive reactance is very high (Directly proportional to Frequency) it produces a phase shift of only 90°
Explanation :  it produces a phase shift of only 90°)
Question 8
The wire placed on the top of a transmission line is a:
Correct Answer : d
Selected Answer : d
Explanation : "Top of the cable is ground wire rest and other (1 or 3 lines) are phase cables. It is just for the protection from lighting strikes. They serve to shield the line and intercept lighting stroke before it hits the current carrying conductors below. That's why they are often made of steel. "
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Question 9
Consider the three-stages RF amplifier shown below AR1 refers to the input amplifier stage. AR2 to the second stage, AR2 to the second stage and AR3 to the output stage. For this amplifier configuration the total noise figure (DB) is most nearly:
Correct Answer : b
Selected Answer : d
Explanation :
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Question 10
Of the following engineering disciplines, who would be BEST suited to design and operate an automobile factory?
Correct Answer : b
Selected Answer : b
Explanation : A mechanical engineer might work in the automotive industry, aerospace and transport industries, power generation, refineries, insurance industries, building services, railway systems design, consumer goods design and production and management consultancies.
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Question 11
Which of the following describes the leakage flux?
Correct Answer : a
Selected Answer : a
Explanation : Leakage flux is the flux outside the core. Other fluxes given in choice are useful fluxes.
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Question 12
Fast Tracking in Project means?
Correct Answer : a
Selected Answer : a
Explanation : "Fast-tracking is a technique where activities that would have been performed sequentially using the original schedule are performed in parallel. In other words, fast tracking a project means the activities are worked on simultaneously instead of waiting for each piece to be completed separately. "
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Question 13
We have three resistance of values 2Ω, 3Ω, 6Ω. Which of the following combination will give an effective resistance of 4Ω?
Correct Answer : b
Selected Answer : b
Explanation : [(3x6)/(3+6)] + 2 = 4Ω
Explanation : /(3+6)] + 2 = 4Ω)
Question 14
The condition for successful parallel operation of transformer is:
Correct Answer : d
Selected Answer : d
Explanation : The convenient are same voltage ratio and turns ratio, same percentage impedance, same KVA rating, and same position of tap changer. The mandatory conditions are same phase angle shift, same polarity, same phase sequence and same frequency.
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Question 15
The output of a NOR gate is HIGH if ____________.
Correct Answer : d
Selected Answer : d
Explanation : uploads/Question_Image/5Elec15e.PNG
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Question 16
Digital telecommunication equipment provides connection oriented AND/OR connection less service, connection-oriented service is provided by:
Correct Answer : a
Selected Answer : b
Explanation : ATM has made possible the efficient transmission of multimedia information like voice and video. ATM, however, is connection oriented in nature. Transmission occurs on virtual channels established prior to transmission. In order to accommodate the internetworking of more traditional connectionless LANs and MANs across public wide area networks like B-ISDN, a means by which connectionless service can be provided on top of connection oriented technologies must be devised
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Question 17
Commercial AM Modulation technique is:
Correct Answer : a
Selected Answer : a
Explanation : "Double-sideband suppressed-carrier transmission (DSB-SC) is transmission in which frequencies produced by amplitude modulation (AM) are symmetrically spaced above and below the carrier frequency and the carrier level is reduced to the lowest practical level, ideally being completely suppressed. "
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Question 18
For last switching of an NMOS R-pull up inverter (W/L) should be:
Correct Answer : c
Selected Answer : d
Explanation : Pull up means getting close VDD. So PMOS has VDD as source, naturally when input is zero drain (Equal to drain current) would be pulled up. When output at zero PMOS turns on, it will be pulled high.
Explanation :  would be pulled up. When output at zero PMOS turns on, it will be pulled high.
)
Question 19
A real time kernel is considered a “bare bones” real-time operating system. At a minimum a kernel should provide:
Correct Answer : a
Selected Answer : d
Explanation : kernel is responsible for memory management, process and task management, and disk management.
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Question 20
A certain communication signal uses a bandwidth BW of 2kHz. What is the classification of this signal?
Correct Answer : b
Selected Answer : b
Explanation : Very low frequency or VLF is the ITU designation for radio frequencies (RF) in the range of 2–30 kHz, corresponding to wavelengths from 100 to 10 km, respectively.
Explanation :  in the range of 2–30 kHz, corresponding to wavelengths from 100 to 10 km, respectively.)
Question 21
In medium sized induction motors, the slip is generally around
Correct Answer : c
Selected Answer : c
Explanation : uploads/Question_Image/5Elec21e.PNG
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Question 22
What is the minimum gauge size of the earthing cable?
Correct Answer : b
Selected Answer : b
Explanation : 16 SWG = 0.064” / 1.626mm
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Question 23
For forward biasing:
Correct Answer : b
Selected Answer : b
Explanation : For Forward Biasing Anode potential should be greater than Cathode Potential
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Question 24
Amplifier working with good gain in:
Correct Answer : c
Selected Answer : c
Explanation : Transistors operate in active region, they act as amplifiers i.e. they can be used to increase the strength of the input signal without altering it significantly
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Question 25
What is MOSFET?
Correct Answer : a
Selected Answer : c
Explanation : Metal Oxide Semiconductor Field-Effect Transistor
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Question 26
In open loop system
Correct Answer : d
Selected Answer : c
Explanation : Then an Open-loop system, also referred to as non-feedback system, is a type of continuous control system in which the output has no influence or effect on the control action of the input signal. In other words, in an open-loop control system the output is neither measured nor “fed back” for comparison with the input.
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Question 27
A circuit breaker is a
Correct Answer : c
Selected Answer : c
Explanation : A circuit breaker is a safety device to prevent damage to motors and wiring when the current flowing through the electrical circuit supersedes its design limits. Simply put, a switch is designed to switch power on and off, a circuit breaker “breaks” the circuit in an overload or fault condition
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