Inspector of Factories • Paper-III
The transmission bandwidth is doubled in FM. The SNR is -
A)
also doubled
B)
improved four fold
C)
decreased by one fourth
D)
unaffected
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'improved four fold' (Option B).
Inspector of Factories • Paper-III
Under small signal operation of a diode -
A)
its bulk resistance increases
B)
its junction resistance predominates
C)
it acts like a closed switch
D)
it behaves as a clipper
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'its junction resistance predominates' (Option B).
Inspector of Factories • Paper-III
The contents of accumulator after the execution of following instruction will be - MVI A, A7H; ORA A; RLC
A)
CFH
B)
4FH
C)
4EH
D)
CEH
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is '4FH' (Option B).
Inspector of Factories • Paper-III
A 8085 microprocessor program uses all available Jump instructions, each only once. For this program, the total memory (in Bytes) occupied by the Jump instructions is -
A)
30
B)
27
C)
24
D)
18
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is '30' (Option A).
Inspector of Factories • Paper-III
In a three phase full wave a.c. to d.c. converter, the ratio of output ripple frequency to the supply voltage frequency is -
A)
2
B)
3
C)
6
D)
12
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is '2' (Option A).
Inspector of Factories • Paper-III
In a thyristor, ratio of latching current to holding current is -
A)
0.4
B)
1.0
C)
2.5
D)
6.0
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is '1.0' (Option B).
Inspector of Factories • Paper-III
The number of hardware interrupts (which require an external signal to interrup) present in an 8085 microprocessor -
A)
1
B)
4
C)
5
D)
15
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is '1' (Option A).
Inspector of Factories • Paper-III
The noise temperature about 4306K. The noise figure will be -
A)
3 dB
B)
6 dB
C)
12 dB
D)
24 dB
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is '6 dB' (Option B).
Inspector of Factories • Paper-III
The instruction that does not clear the accumulator of 8085 is -
A)
XRA A
B)
ANI 00H
C)
MVI A, 00H
D)
None of these
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'XRA A' (Option A).
Inspector of Factories • Paper-III
In the case of a thyristor, di/dt capability can be improved by -
A)
thermal triggering
B)
voltage triggering
C)
dv/dt triggering
D)
gate pulse triggering
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'voltage triggering' (Option B).
Inspector of Factories • Paper-III
The stack pointer in the 8085 microprocessor is a -
A)
16 bit register that point to stack memory locations
B)
16 bit accumulator
C)
memory location in the stack
D)
flag register used for the stack
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'flag register used for the stack' (Option D).
Inspector of Factories • Paper-III
What is the memory word addressing capability in 8085?
A)
32 K
B)
64 K
C)
256 K
D)
512 K
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is '256 K' (Option C).
Inspector of Factories • Paper-III
As compared to full wave rectifier using two diodes, the four diode bridge rectifier has the dominant advantage of -
A)
higher current carrying capacity
B)
lower peak inverse voltage requirement
C)
lower ripple factor
D)
higher efficiency
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'higher current carrying capacity' (Option A).
Inspector of Factories • Paper-III
A p-n junction diode’s dynamic conductance is directly proportional to -
A)
the applied voltage
B)
the temperature
C)
its current
D)
the thermal voltage
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'the applied voltage' (Option A).
Inspector of Factories • Paper-III
The depletion region in semiconductor p-n junction diode has -
A)
electrons and holes
B)
positive and negative ions on either side
C)
neither electron nor ion
D)
no holes
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'neither electron nor ion' (Option C).
Inspector of Factories • Paper-III
Which of the following devices should be used as a switch in a low power switched mode power supply (SMPS)?
A)
GTO
B)
MOSFET
C)
TRIAC
D)
THYRISTOR
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'THYRISTOR' (Option D).
Inspector of Factories • Paper-III
A single phase diode bridge rectifier supplies a highly inductive load. The load current can be assumed to be ripple free. The ac supply side current waveform will be -
A)
sinusoidal
B)
constant dc
C)
square
D)
triangular
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'sinusoidal' (Option A).
Inspector of Factories • Paper-III
Reverse recovery current in a diode depends upon -
A)
forward field current
B)
storage charge
C)
temperature
D)
PIV
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'temperature' (Option C).
Inspector of Factories • Paper-III
For 15 bit PCM system the signal to quantisation noise ratio is 20 dB. If the number of bits are increased by 4, the signal to quantisation noise will be -
A)
increase by 6 dB
B)
increase by 12 dB
C)
increase by 18 dB
D)
increase by 24 dB
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'increase by 24 dB' (Option D).
Inspector of Factories • Paper-III
Turn on and turn-off times of a transistor depend on -
A)
Static characteristics
B)
Junction capacitance
C)
Current gain
D)
None of these
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'Current gain' (Option C).
Inspector of Factories • Paper-III
The range of superheterodyne receiver tuning when f_LO > f_S with broadcast frequency ranges 540 to 1600 kHz is -
A)
85 – 1145 kHz
B)
540 – 1600 kHz
C)
995 – 2055 kHz
D)
1450 – 2510 kHz
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is '540 – 1600 kHz' (Option B).
Inspector of Factories • Paper-III
Satellite used for intercontinental communications are known as -
A)
Comsat
B)
Domsat
C)
Marisat
D)
Intelsat
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'Domsat' (Option B).
Inspector of Factories • Paper-III
Consider the case that noise phase modulates the FM wave. As the noise sideband frequency approaches the carrier frequency, the noise amplitude -
A)
remains constant
B)
is decreased
C)
is increase
D)
is equalised
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'is decreased' (Option B).
Inspector of Factories • Paper-III
Effective address is calculated by adding or subtracting displacement value to -
A)
immediate address
B)
relative address
C)
absolute address
D)
base address
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'immediate address' (Option A).
Inspector of Factories • Paper-II
A generated station has a maximum demand of 30 MW, a load factor of 60% and a plant capacity factor of 50%. The reserve capacity of the plant is -
A)
5 MW
B)
4 MW
C)
6 MW
D)
10 MW
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is '6 MW' (Option C).
