In an 8085 microprocessor, after the execution of XRA A instruction

A) the carry flag is set
B) the accumulator contains FFH
C) the zero flag is set
D) the accumulator contents are shifted left by one bit

The melting point of carbon is:

A) 1800 degree Centigrade
B) 2200 degree Centigrade
C) 3500 degree Centigrade
D) 5500 degree Centigrade

A power system is subjected to a fault which makes the zero sequence component of current equal to zero. The nature of fault current is:

A) Double line to ground fault
B) Line to line fault
C) Line to ground fault
D) Three-phase to ground fault

Impulse testing of transformers is done to determine the ability of:

A) bushings to withstand vibrations
B) insulation to withstand transient voltages
C) windings to withstand voltage fluctuations
D) all of the above

The 8O85 assembly language instruction that stores the contents of H and L registers into the memory locations 2050H and 2051H, respectively, is:

A) SPHL 2050H
B) SPHL 2051H
C) SHLD 2050H
D) STAX 2050H

A passive 2-port network is in a steady-state compared to its input, the steady state output can never offer

A) higher voltage
B) lower impedance
C) greater power
D) better regulation

Decimal equivalent of Hexadecimal number (C3B1)16 is:

A) 12197
B) 32097
C) 52097
D) 50097

The driving power from the prime-mover driving the alternator is lost but the alternator remains connected to the supply network; the field supply also remains on. The alternator will:

A) get burnt
B) behave as an induction motor but will rotate in the opposite direction
C) behave as a synchronous motor and will rotate in the same direction
D) behave as a synchronous motor but will rotate in a reverse direction to that corresponding to
generator action

A 200 milli-Ampere meter has accuracy of 0.5 percent. Its accuracy while reading 100 milli- Ampere will be:

Answer D

In air-blast circuit breakers, the pressure of the air is of the order of:

A) 100 mm Hg
B) 1 kg / cm2
C) 20 kg / cm2 to 30 kg / cm2
D) 200 kg / cm2 to 300 kg / cm2

The bridge used to measure the dielectric loss of an insulator is:

A) Anderson bridge
B) Wien’s bridge
C) Schering bridge
D) Any of the above

In a series RLC circuit at resonance, the magnitude of the voltage developed across the capacitor

A) is always zero
B) can never be greater than the input voltage
C) can be greater than the input voltage, however, it is 90° out of phase with the input voltage
D) can be greater than the input voltage, and is in phase with the input voltage.

For the circuit given below, the Thevenin’s resistance across the terminals A and B is

DELETED

A high-pass filter has a resistance R = 2 kΩ The lowest input frequency to be passed is 7.5 kHz. The value of suitable coupling capacitor must be:

A) 0.001 pico Farad
B) 0.01 pico Farad
C) 0.1 pico Farad
D) 1 pico Farad


DELETED

A long transmission line has considerable ……………….. effect.

A) series capacitance
B) shunt capacitance
C) series inductance
D) shunt inductance

For the protection of parallel feeders fed from one end, the relays used are:

A) non-directional relays at the source-end and directional relays at the load-end
B) non-directional relays at both the ends
C) directional relays at the source-end and non-directional at the load-end
D) directional relays at both the ends

An ideal voltage source will charge an ideal capacitor

A) in infinite time
B) exponentially
C) instantaneously
D) cannot be guessed

A system is critically damped. If the gain of the system is increased, the system will behave as:

A) overdamped
B) underdamped
C) oscillatory
D) critically damped

In a microprocessor, the address of the next instruction to be executed, is stored in

A) Stack pointer
B) Address latch
C) Program counter
D) General purpose register

Vx in the network below is:

Answer B) -2 volt