Inspector of Factories • Paper-III
In a 3-phase bridge inverter, the line to line voltage waveform is: (1) square wave for 180 degrees mode, (2) square wave for 120 degrees mode, (3) stepped wave for 180 degrees mode, (4) stepped wave for 120 degrees mode. From these, the correct statements are -
A)
1, 3
B)
2, 3
C)
1, 4
D)
2, 4
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is '1, 4' (Option C).
Inspector of Factories • Paper-III
If the accumulator of an Intel 8085 A microprocessor contains 37 H and the previous operation has set the carry flag, the instruction ACI 56 H will result in -
A)
8E H
B)
94 H
C)
7E H
D)
84 H
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is '84 H' (Option D).
Inspector of Factories • Paper-III
The video voltage applied to the picture tube of a television receiver is fed in -
A)
between grid and ground
B)
to the yoke
C)
to the anode
D)
between grid and cathode
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'to the anode' (Option C).
Inspector of Factories • Paper-III
The junction capacitance of a p-n junction depends on -
A)
doping concentration only
B)
applied voltage only
C)
both doping concentration and applied voltage
D)
barrier potential only
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'barrier potential only' (Option D).
Inspector of Factories • Paper-III
A microprocessor has 24 address lines and 32 data lines. If it uses 10 bits of op-code, the size of its Memory Buffer Register is -
A)
22 bits
B)
24 bits
C)
32 bits
D)
14 bits
Based on established principles in Computer Science & Engineering, the correct and most appropriate choice is '14 bits' (Option D).
Inspector of Factories • Paper-III
A freewheeling diode across inductive load will provide -
A)
quick turn on
B)
slow turn off
C)
reduced utilization factor
D)
improved power factor
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'slow turn off' (Option B).
Inspector of Factories • Paper-III
The output of the vertical amplifier applied to the yoke in a TV receiver consists of -
A)
direct current
B)
amplified vertical sync pulses
C)
a sawtooth voltage
D)
a sawtooth current
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'a sawtooth current' (Option D).
Inspector of Factories • Paper-III
In the 8085 microprocessor, the RST6 instruction transfers the program execution to the following locations -
A)
30H
B)
24H
C)
48H
D)
60H
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is '24H' (Option B).
Inspector of Factories • Paper-III
To obtain very high input and output impedance in a feedback amplifier, the topology mostly used in-
A)
voltage series
B)
current series
C)
voltage shunt
D)
current shunt
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'voltage series' (Option A).
Inspector of Factories • Paper-III
In a 3-phase full converter, the six SCRs are fired at an interval of -
A)
30 degrees
B)
60 degrees
C)
90 degrees
D)
120 degrees
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is '120 degrees' (Option D).
Inspector of Factories • Paper-III
How many FFs are needed for MOD-16 ring counter and MOD-16 Johnson counter?
A)
16, 16
B)
16, 8
C)
4, 8
D)
8, 16
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is '8, 16' (Option D).
Inspector of Factories • Paper-III
Which type of the following flip-flop cannot be converted to D-type flip-flop -
A)
S-R flip-flop
B)
J-K flip-flop
C)
Master slave flip-flop
D)
None of these
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'None of these' (Option D).
Inspector of Factories • Paper-III
The mnemonics used in writing a program is called -
A)
assembly language
B)
fetch cycle
C)
microinstruction
D)
object program
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'object program' (Option D).
Inspector of Factories • Paper-III
The modulation index of an AM wave is changed from 0 to 1. The transmitted power is -
A)
unchanged
B)
halved
C)
doubled
D)
increased by 50 percent
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'halved' (Option B).
Inspector of Factories • Paper-III
A superheterodyne receiver with an IF of 450 kHz is tuned to a signal at 1200 kHz. The Image frequency is -
A)
750 kHz
B)
900 kHz
C)
1650 kHz
D)
2100 kHz
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is '2100 kHz' (Option D).
Inspector of Factories • Paper-III
A 50.004 MHz carrier is to be frequency modulated by a 3 KHz audio tone resulting in a narrow band FM signal. Determine the bandwidth of the FM signal -
A)
2 KHz
B)
4 KHz
C)
6 KHz
D)
4 MHz
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is '2 KHz' (Option A).
Inspector of Factories • Paper-III
In a low-level AM system, amplifiers following the modulator stage must be -
A)
linear devices
B)
harmonic devices
C)
class C amplifiers
D)
nonlinear devices
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'linear devices' (Option A).
Inspector of Factories • Paper-III
In a thyristor anode current made up of -
A)
electrons only
B)
electrons or holes
C)
electrons and holes
D)
holes only
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'electrons or holes' (Option B).
Inspector of Factories • Paper-III
A gate turn off (GTO) thyristor -
A)
Requires a special turn off circuit like a thyristor
B)
Can be turned off by removing the gate pulse
C)
Can be turned off by a negative current pulse at the gate
D)
Can be turned off by a positive current pulse at the gate
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'Can be turned off by removing the gate pulse' (Option B).
Inspector of Factories • Paper-III
A forward voltage can be applied to an SCR after its -
A)
anode current reduces to zero
B)
gate recovery time
C)
reverse recovery time
D)
anode voltage reduces to zero
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'reverse recovery time' (Option C).
Inspector of Factories • Paper-III
In 8085 microprocessor system, the direct addressing instruction is -
A)
MOV A, B
B)
MOV B, 0AH
C)
MOV C, M
D)
STA addr
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'MOV B, 0AH' (Option B).
Inspector of Factories • Paper-III
The race around condition exists in J-K flip flop if -
A)
J = 0, K = 1
B)
J = 1, K = 1
C)
J = 0, K = 0
D)
J = 1, K = 1
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'J = 0, K = 0' (Option C).
Inspector of Factories • Paper-III
Silicon diode is less suited for low voltage rectifier operation because -
A)
it can withstand high temperature
B)
its reverse saturation current is low
C)
its cut-in voltage is high
D)
its breakdown voltage is high
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'its cut-in voltage is high' (Option C).
Inspector of Factories • Paper-III
A triangular-square wave generator uses -
A)
A sine wave oscillation and a comparator
B)
An integrator and a comparator
C)
A differentiator and a comparator
D)
A sine wave oscillator and a clipper
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'An integrator and a comparator' (Option B).
Inspector of Factories • Paper-III
The function of snubber circuit connected across an SCR is to -
A)
suppress dv/dt
B)
increase dv/dt
C)
decrease dv/dt
D)
keep transient overvoltage at a constant value
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'keep transient overvoltage at a constant value' (Option D).
