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KPSC Mock Test: Junior Instructor (Electronic Mechanic) - Industrial Training

KPSC Mock Test: Junior Instructor (Electronic Mechanic) - Industrial Training

Official Kerala Public Service Commission ONLINE Exam Question Paper & Answer Key. • Name of Post: Junior Instructor (Electronic Mechanic) - Industrial Training • Department / Institution: (Cat.No. 333/2019) • Question Paper Code: 81/2023/OL • Date of Test: 13-06-2023 • Answer Key: Provisional Answer Key Question Paper PDF: https://www.keralapsc.gov.in/sites/default/files/2023-09/fky-81-23.pdf Answer Key PDF: https://www.keralapsc.gov.in/sites/default/files/2023-06/provisional_naswer_key__junior_instructor_electronic_me.pdf

100 Questions
Progress: 0 / 100 Answered
1
Two resistors of the same value are connected in parallel and a 100V supply is connected across the terminals. If the total current taken is 10A, what is the value of each resistor?
2
Select the colour code for a resistor of value 680kΩ with ±5% tolerance from the given options.
3
The reactance of a capacitor ________ with increase in frequency of the current flowing through it.
4
The quality factor 'Q' of a coil at resonance is 100. If the resistance of the coil is 10Ω, what is the value of it's reactance at resonance?
5
Two capacitors 100μF each, connected in parallel are then connected in series with a third capacitor of value 200μF. What is the effective capacitance of the entire combination?
6
Which of the following devices exhibits negative resistance?
7
Which breakdown mechanism is likely to take place in a heavily doped PN junction diode?
8
Which of the following statements are not correct for a JFET? (i) It is a bipolar device (ii) It has high input impedance (iii) It is a current controlled device (iv) Small in size compared to BJT
9
The arrow pointer on a transistor symbol indicates
10
For the operation of n-channel E-MOSFET, the gate voltage must be
11
Which of the following is an adjustable voltage regulator IC?
12
The forbidden energy gap of Silicon at room temperature is
13
A heavily doped p-type semiconductor material is
14
At a PN-junction, electrons diffuse from the N-region to the P-region because of the
15
Which of the following statements about the leakage current in a semiconductor diode are correct? (i) Created due to the flow of majority carriers. (ii) Remains the same irrespective of the changes in biasing voltage. (iii) Varies with variation in temperature. (iv) Of the order of microamperes in silicon and nanoamperes in germanium
16
Which of the following defines base transportation factor of an NPN transistor?
17
Which transistor configuration has very high input resistance and very low output resistance?
18
The current gain α\alpha of a transistor is 0.99. What is the value of its β\beta?
19
In a BJT amplifier, the Q-point is stabilized by
20
Factors that affect the lower cut-off frequency of a RC coupled CE amplifier are (i) Ineffective bypassing of emitter bypass capacitors (ii) Bypassing effect of junction capacitances (iii) Signal loss across coupling capacitors (iv) Loading effect of subsequent stages
21
Which coupling scheme is preferred for a multistage amplifier used to amplify signals below 10 Hz?
22
Which of the following oscillator circuits is suitable to generate audio frequency signals?
23
Which of the following circuit can be used as a memory element?
24
The differential mode gain of an op-amp is 10510^5. If the common mode gain is 0.1, what is its CMRR?
25
Which of the following is not the characteristic of an ideal op-amp?
26
The electrolyte used in dry cell?
27
The specific gravity of the electrolyte in a lead acid battery can be measured using _________.
28
Conventionally the energy stored in a battery is measured in __________.
29
In a full wave rectifier if the input signal frequency is 50 Hz, find the output signal frequency?
30
Based on the input cycles utilized, the rectifiers can be classified as __________.
31
The following symbol represents _________ in an electrical system.
32
Choose the disadvantage of SMPS:
33
The regulated DC power supply consists of ________.
34
The instruments used for critical load during temporary power failure occur is ________.
35
What is used to neutralize a spilled electrolyte from a lead acid battery?
36
The self inductance of two coils is 16 mH and 4 mH respectively. If the coefficient of coupling is 0.7, the mutual inductance between the coils is,
37
The voltage and current in ac circuit is represented by v=sin⁡(ωt+30∘)v = \sin(\omega t + 30^\circ) and i=2sin⁡(ωt−45∘)i = \sqrt{2}\sin(\omega t - 45^\circ). The power factor angle of the circuit is
38
What is the true condition for maximum power transform from source to load as per maximum power transform theorem?
39
Power factor of a parallel resonant circuit is
40
Which of the following instruments measure RMS value of unknown current?
41
The energy meter installed near the main switch in residences and other locations is,
42
The extension range of an ammeter and voltmeter can be made represented by,
43
In a moving iron instrument which is spring controlled, a current of 5A produces a deflection of 60∘60^\circ. What will be the deflection when a current of 2A is flowing through the coil of the instrument?
44
According to Faraday's law of electromagnetic induction,
45
Which of the following is not the unit of energy?
46
The rise time 't' of a signal applied to CRO and bandwidth 'B' of the CRO are related as
47
An oscilloscope is used to measure the phase difference or the frequency relationship between two unknown signals, it is used in the
48
A triangular wave shape is obtained in a function generator
49
In a digital multimeter resistance is measured by using
50
The delay line in CRO is placed after
51
The recommended configuration for soldering is
52
Addition of ________ increases the mechanical property of a tin-lead solder.
53
The purpose of using flux in soldering is
54
Heat for soldering process is supplied by
55
Temperature range in soldering process is
56
Tropospheric scatter is used with frequency in the following range
57
The maximum power of single side band waves under distortionless condition is
58
Wide band FM is the case where the modulation index is
59
In a super heterodyne receiver the frequency of local oscillator is
60
In a line of sight system the receiving and transmitting antenna heights are 10m and 100m respectively above the surface of the earth. The range of the system will be approximately
61
QPSK system uses a phase shift of
62
FDM uses ________ to prevent modulated signal from overlapping.
63
A 500W carrier is amplitude modulated to a depth of 60%. What is the total power of the transmitted wave.
64
Which fiber is preferred for long distance communication
65
Optical Time Domain Reflectometer is used to measure
66
Which of the following is the feature of mobile communication?
67
The process of converting the analog sample into discrete form is called
68
If physical quantities like force, tension, or pressure are to be measured, then LVDT acts as a
69
Identify the incorrect statement 1. LVDT gives high output value so that there is no need for any amplifier circuit for the amplification process 2. LVDT is not sensitive to stray magnetic field
70
Which metal will have a large range of detection by inductive proximity sensor?
71
In semiconductor strain guage, when a tensile strain is applied,
72
Thermocouple works on
73
The temperature of steam at around 540°C can be measured by
74
In a thermistor, change in resistance is measured using a
75
Capacitive transducers can be used for the measurement of liquid level. The principle of operation used to this case is
76
Inductive transducers are mainly used for the measurement of
77
Which device provides electrical isolation between input circuit and output circuit?
78
An OR gate is equivalent to two switches connected in __________.
79
The carry output of a two-input half-adder can be realised by using a _______ logic gate.
80
The Gray code equivalent of a 4-bit binary number 1010 is ________.
81
The XNOR gate gives a high output when inputs are ________.
82
Ripple counters are _________ counters
83
Decade counter counts up to _______ states.
84
According to De Morgan's theorem NAND gate is equivalent to ________ gate.
85
The number of select lines required to design an 8×1 multiplexer.
86
A flip flop can ________ one bit of information.
87
A _______ shift register can convert serial to parallel data.
88
Which one is an Analog to Digital converter?
89
A decade counter requires ________.
90
Three T flip flops are connected to form a counter, how many counting sequences it can count.
91
8086 Microprocessor is a _________ bit processor.
92
8086 Microprocessor flag register has ________ flags.
93
_______ flag is used for debugging in 8086.
94
8086 can access upto _________ memory locations.
95
MOV AX, [BX] is an example of a ________ mode of addressing.
96
8051 is a ________ bit Microcontroller.
97
Pin number 40 of the 8051 microcontrollers is _________.
98
Microcontrollers have no ________ flag.
99
The Serial data communication in 8051 is controlled by _________ registers.
100
8051 Microcontroller have _________ interrupt signals.

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