Quiz Questions

ITI Quiz - 30-june-2026 02:12 PM (ITISKILL2137A6)

Q-Paper A-Paper
Question 1 1 Marks
How the mechanical zero error of panel meter is corrected?
A
By replacing pointer
B
By replacing moving coil
C
By replacing moving coil
D
Keeping the meter in vertical position
Question 2 1 Marks
What is the type of transistor BPX81?
A
Uni - Junction transistor
B
NPN - Photo transistor
C
PNP - Photo transistor
D
Audio frequency transistor
Question 3 1 Marks
What is the typical forward voltage drop of the RED colour LED?
A
1.8 V
B
2 V
C
2.1 V
D
2.2 V
Question 4 1 Marks
What is the advantage of SMPS in computer?
A
Bulky
B
High efficiency
C
High frequency noise low
D
Servicing of SMPS is easy
Question 5 1 Marks
What is the advantage of using bias in transistor circuits?
A
Provides positive feed back
B
Never reach saturation
C
Easily sets saturated
D
Gives maximum distortion
Question 6 1 Marks
What is the range of photo current for photo transistor BPX 38?
A
0.1MA to 1.2MA
B
0.2MA to 1.6MA
C
0.3MA to 2.7MA
D
0.4MA to 3.8MA
Question 7 1 Marks
Which frame is used for winding the coil of PMMC meter?
A
Steel frame
B
Wooden frame
C
Ceramic frame
D
Aluminium frame
Question 8 1 Marks
How the sensitivity of voltmeter is determined?
A
FSD current
B
Meter coil resistance
C
Ohms per volt rating
D
Maximum voltage measurement
Question 9 1 Marks
How the lamp failures caused by the high inrush currents in lamp dimmer circuits using TRIAC is eliminated?
A
By the fuse
B
Using MCB
C
Using Safety resistor
D
By soft start circuit
Question 10 1 Marks
Which gauge number of rosin-cored solder is suitable for soldering medium sized joints?
A
16 gauge rosin cored
B
18 gauge rosin cored
C
22 gauge rosin cored
D
24 gauge rosin cored
Question 11 1 Marks
When does the biased positive clipper removes the portion of input signal?
A
During the negative half cycle of input
B
Signal voltage is lesser than bias battery
C
Signal voltage equals the bias battery voltage
D
Signal voltage becomes greater than bias battery voltage
Question 12 1 Marks
What is successive approximation (SAR)?
A
Method of IC fabrication
B
Method of D/A conversion
C
Method of D/A conversion
D
Method of SMT
Question 13 1 Marks
Which is the output pin number IC 555 timer?
A
Pin number 6
B
Pin number 5
C
Pin number 5
D
Pin number 3
Question 14 1 Marks
What is the main problem caused for severe pitting in relays?
A
Low contact current
B
Excessive contact current
C
Chatter during a slow release
D
Excessive number of operations
Question 15 1 Marks
When does the rosin flux melts in a soldering process?
A
After the solder melts
B
When the solder is melting
C
During the solder is melting
D
When the solder is heated
Question 16 1 Marks
Why the transformer core is made as thin laminations?
A
To minimize eddy current losses
B
To increase the hysteresis losses
C
To maximize eddy current losses
D
To increase core saturation losses
Question 17 1 Marks
What is the name of multi-stage amplifiers?
A
Cascoded amplifier
B
Cascaded amplifier
C
Complementry symmetry amplifier
D
Darlington pair amplifier
Question 18 1 Marks
Which device is a unipolar transistor?
A
UJT
B
FET
C
BJT
D
IGBT
Question 19 1 Marks
What is the forward voltage drop of single colour Red LED?
A
1.8 V
B
2 V
C
2.1 V
D
2.2 V
Question 20 1 Marks
Which configuration of transistor amplifier is most commonly used in electronic circuits?
A
Common base configuration
B
Common emitter configuration
C
Common collector configuration
D
Common drain amplifier configuration
Question 21 1 Marks
How the solid state relays are working for increased lifetime?
A
Bulky profile
B
Slower in operations
C
Spark generated during switching
D
No moving parts to wear and tear
Question 22 1 Marks
When does the zener diode begins to conduct in the reverse biased condition?
A
When bias voltage reached 0.7V
B
After the barrier voltage cancelled
C
Voltage across zener reached 0.3V
D
Voltage across it reached the zener voltage
Question 23 1 Marks
What is the gate current (Ig) of the JFET, when reverse biased?
A
Practically very low
B
Practically zero
C
Practically unity
D
Practically infinity
Question 24 1 Marks
What is the unit of inductance?
A
Joule
B
Farad
C
Henry
D
Watts
Question 25 1 Marks
Which is the N - channel FET?
A
AC supply connected to drain termin
B
Main current flows through N-doped material
C
Main current flows through P-doped material
D
S-terminal connected to positive
Question 26 1 Marks
Which method is adopted to charge a car battery with voltage rating of 2.3 V per cell?
A
Float charging method
B
Trickle charging method
C
Constant current charging method
D
Constant voltage charging method
Question 27 1 Marks
What is the function of solid state relay(SSR)?
A
Low pass filter
B
High frequency oscillator
C
High gain amlifier
D
High speed switching
Question 28 1 Marks
What is the purpose of using positive feed back in amplifiers?
A
To produce modulation
B
To produce demodulation
C
To produce oscillation
D
To produce multiplexion
Question 29 1 Marks
What is the relation of wire diameter with current carrying capacity of conductor?
A
Wire gets less heat
B
Directly proportional
C
Inversely proportional
D
Drops more voltage across it
Question 30 1 Marks
At which temperature the 6040 solder start meeting?
A
100 Degree Centigrade
B
200 Degree Centigrade
C
300 Degree Centigrade
D
380 Degree Centigrade
Question 31 1 Marks
Which device is used to produce hard copy of a document in a computer?
A
Printer
B
Monitor
C
Modem
D
Speaker
Question 32 1 Marks
What is the minimum forward current If for single colour LEDs?
A
5 MA
B
10 MA
C
20 MA
D
30 MA
Question 33 1 Marks
What is the peak to peak voltage in a bridge rectifier circuit with load current of 10 mA, capacitance of 470 F and 50 Hz supply frequency?
A
0.213 v
B
1.525 v
C
2.134 v
D
3.567 v
Question 34 1 Marks
Which terminal of the meter is connected for measuring electrical quantity?
A
Input terminal
B
Output terminal
C
Output terminal
D
Pointer mechanism
Question 35 1 Marks
What is the purpose of standard wire gauge (SWG)?
A
Measure current
B
Measure voltage
C
Measure diameter of wire
D
Measure insulation of wire
Question 36 1 Marks
What in the current gain of a common ? base amplifier?
A
Unity
B
Infinity
C
Greater than 1
D
Less than 1
Question 37 1 Marks
Which semiconductor devices are composed inside the solid state relays?
A
Diodes and transistors
B
Thyristor and transistors
C
MOSFETs and IGBTs
D
UJYs and FETs
Question 38 1 Marks
Which coding system for transistor type numbering system is followed by American standard?
A
JIS standard
B
Home codes
C
JEDEC standard
D
PRO-ELECTRON standard
Question 39 1 Marks
What is the reason for electric fire?
A
Deviation
B
Open circuit
C
Overloading
D
Proper earthing
Question 40 1 Marks
Which type of defects are occurring in solid
state relays?
A
More sparking
B
Intermittent working
C
Tendency to fail open
D
Tendency to fail shorted
Question 41 1 Marks
What is the range of temperature used in soldering station?
A
150 Degree Centigrade to 450 Degree Centigrade
B
450 Degree Centigrade to 600 Degree Centigrade
C
600 Degree Centigrade to 800 Degree Centigrade
D
800 Degree Centigrade to 1000 Degree Centigrade
Question 42 1 Marks
Which unit is used to measure capacitance value?
A
Mho
B
Ohm
C
Farad
D
Henry
Question 43 1 Marks
What is the defect on the soldered joint, if it is cooled by blowing air?
A
Poor wetting
B
Pits and voids
C
Dry solder joint
D
Dull grainy surface
Question 44 1 Marks
Why the complementary - symmetry amplifier is preferred over the other types of amplifier configurations?
A
To minimize the gain
B
To get less distortion
C
To get more voltage gain
D
To eleminate the transformer
Question 45 1 Marks
Which is the major factor determines the quality performance of A/D converter?
A
Depends on data latch
B
Measuring parameter
C
Measuring parameter
D
Conversion cycle
Question 46 1 Marks
Why the electronic device IGBT is preferred over the power MOSFET?
A
Low switching speed
B
Higher driving power requirement
C
Higher switching repetition rates
D
Suitability for medium power applications
Question 47 1 Marks
Which section is used by the processor to save instructions?
A
Memory
B
System unit
C
Graphics card
D
Micro processor
Question 48 1 Marks
Which soldering instrument has hot air blowing facility?
A
Soldering iron
B
Soldering station
C
Wave soldering machine
D
Temperature controlled soldering iron
Question 49 1 Marks
Which electrical quantity controls the operation of the bipolar transistor device?
A
Energy
B
Current
C
Voltage
D
Frequency
Question 50 1 Marks
Which battery is used for cellular phones?
A
Nickel ion
B
Lithium ion
C
Zinc chloride
D
Sodium sulphur
Question 51 1 Marks
What is the name of flux used for soldering electronic components?
A
Resin
B
Rosin
C
Mild acid
D
Organic acid
Question 52 1 Marks
What is the effect of electric shock at very low voltage levels (Less than 40v)?
A
Fibrillation
B
Muscles contact
C
Burning of the skin
D
Unpleasant tingling sensation
Question 53 1 Marks
What type of packaging is generally used to transistors utilized for low power amplification?
A
Metal packaging
B
Plastic packaging
C
Ceramic packaging
D
Plastic packaging with metal heatsinks
Question 54 1 Marks
Why NPN type of transistors are preferred over the PNP type transistors?
A
NPN has lower switching speed
B
NPN has good bias stability
C
NPN has higher switching speed
D
Low operating voltage
Question 55 1 Marks
What is the maximum power dissipation Pmax for BF 245B?
A
100 mw
B
200 mw
C
300 mw
D
400 mw
Question 56 1 Marks
Which of the device is opto-coupled TRIACS?
A
BT136
B
B3202
C
2N2648
D
MOC3020
Question 57 1 Marks
What is the name of effect of changing current in one coil, induces EMF in nearby coil?
A
Coupling
B
Induction
C
Self induction
D
Mutual induction
Question 58 1 Marks
Which ratio of tin-lead combination is used for electronic component soldering work?
A
40:60
B
20:40
C
60:40:00
D
63:37:00
Question 59 1 Marks
What is the result of hysteresis loss in magnetic material?
A
Back emf increases
B
Eddy current decreases
C
Magnetic flux increases
D
Energy loss takes place
Question 60 1 Marks
Which method is followed to troubleshoot the problem causing section by the symptom?
A
Step by step method
B
Sensory test method
C
Trial and error method
D
Logical approach method
Question 61 1 Marks
What is the use of clamper in electronic circuits?
A
For slicing both peaks
B
For positive peak clipping
C
For negative peak clipping
D
For DC component restoration
Question 62 1 Marks
What is the full form of the abbreviation CD-ROM in computer?
A
Classified Device Read Only Memory
B
Computer Disk Read Only Memory
C
Connectivity Digital Read Only Memory
D
Compact Disk Read Only Memory
Question 63 1 Marks
Which characteristics enable the deflection of pointer in the attraction type moving iron meter?
A
Weight of the soft iron pieces
B
Deflection is inversely proportional to current
C
Deflection is independent of current direction
D
Deflecting and controlling torques are
Question 64 1 Marks
What is the effect of over heating on soldering a joint?
A
Cold joint
B
Poor wetting
C
Dull grainy surface
D
Flux trapped against lead
Question 65 1 Marks
Which control is used in repulsion type moving iron instrument to keep the pointer at zero position?
A
Spring control
B
Air damping control
C
Magnetic repulsion control
D
Magnetic attraction control
Question 66 1 Marks
What type of control is used for FET?
A
Resistance controlled device
B
Voltage controlled device
C
Current controlled device
D
Frequency controlled device
Question 67 1 Marks
Which characteristics exhibits the current conduction increases while the voltage across the devices decreases in a DIAC?
A
Linearity characteristics
B
Negative resistance characteristics
C
Positive resistance characteristics
D
Nonlinearity characteristics
Question 68 1 Marks
What is the percentage of charge accumulated by the capacitor at the end of 2 time constant limit?
A
0.4
B
0.5
C
0.632
D
0.864
Question 69 1 Marks
What is the use of screw driver?
A
Hold the screws
B
Tighten or loosen screws
C
Tighten or loosen bolts
D
Tighten or loosen rivets
Question 70 1 Marks
Which is the drain current (Id) in JFET?
A
Electron from drain to gate
B
Electron from source to drain
C
Electron from drain to source
D
Electron from gate to source
Question 71 1 Marks
Which circuit uses photo-darlington devices?
A
DC circuits
B
Counter circuits
C
Amplifier circuits
D
AC powered circuits
Question 72 1 Marks
What is the name of the process of converting AC into DC voltage?
A
Inverting
B
Rectifying
C
Amplifying
D
Demodulating
Question 73 1 Marks
Which is the first step followed in troubleshooting of electronic circuit?
A
Thermal test
B
Chemical test
C
Mechanical test
D
Physical and sensory test
Question 74 1 Marks
What is the maximum current ratings of solid state relays available in high power packages?
A
1 Amp
B
10 Amp
C
40 Amp
D
100 Amp
Question 75 1 Marks
Which three terminal voltage regulator IC has adjustable output?
A
LM 100
B
LM 105
C
LM 305
D
LM 317
Question 76 1 Marks
What is the name of the procedure carried out to ensure the trustworthy standards of the measuring instrument?
A
Calibration
B
Range test
C
Re-alignment
D
Testing standards
Question 77 1 Marks
Which bearing is supporting the shaft of moving coil assembly in a PMMC instrument?
A
Steel bearings
B
Bush bearings
C
Jewelled bearings
D
Gun metal bearings
Question 78 1 Marks
Which electrolyte is used in lead-acid battery?
A
Zinc chloride
B
Sulphuric acid
C
Alkaline solution
D
Potassium hydroxide solution
Question 79 1 Marks
How batteries are classified based on their working?
A
Dry cells and alkaline cells
B
Button cells and lithium cells
C
Primary cells and secondary cells
D
Cylindrical cells and rectangular cells
Question 80 1 Marks
What is the percentage of conductivity of electric current in aluminium?
A
0.22
B
0.47
C
0.56
D
0.76
Question 81 1 Marks
What is the advantage of MOSFET?
A
Superior current conduction capability
B
Low gate signal power requirements
C
Very low on-state voltage
D
Low driving power
Question 82 1 Marks
How the single strand wire is called?
A
Hook - up wire
B
Twisted wire
C
Flexible wire
D
Multistrand wire
Question 83 1 Marks
What is the full form of the abbreviation SPDT used in switches?
A
Single Phase Dual Throw
B
Single Pole Single Throw
C
Single Pole Double Throw
D
Shared Pole Double Throw
Question 84 1 Marks
Why the solvent Iso Propyl Alcohol (IPA) is used on the solder joint?
A
To help the corrosive action
B
Cleaning before soldering the joint
C
To break down the acid within the joint
D
Remove residual flux and prevent corrosion
Question 85 1 Marks
Which factor influences the severity of electrical shock?
A
Very low DC voltage
B
Duration of current passing
C
Level of current in micro ampere
D
Person receives the shock
Question 86 1 Marks
What is the disadvantage of the two diode full wave rectifier compared with a bridge rectifier?
A
DC output level is higher
B
The ripple frequency is higher
C
The need of bulky transformer
D
Each diode carries half the load current
Question 87 1 Marks
What is the input impedance of IGBT?
A
Low input impedance
B
High input impedance
C
Medium input impedance
D
Infinity input impedence
Question 88 1 Marks
What is the purpose of covering provided over the electrical conductor?
A
Increase current flow
B
Reduce current flow
C
Decrease voltage rating
D
Protection against weather
Question 89 1 Marks
Which is the N - channel FET?
A
AC supply connected to drain termin
B
Main current flows through N-doped material
C
Main current flows through P-doped material
D
S-terminal connected to positive
Question 90 1 Marks
How many gauge numbers in SWG, changed to double the cross section area of the conductor?
A
Two gauge sizes decreased
B
Four gauge sizes increased
C
Five gauge sizes increased
D
Three gauge sizes decreased
Question 91 1 Marks
What is the switching speed of solid state relays?
A
1 to 25 nano seconds
B
10 to 60 nano seconds
C
1 to 100 nano seconds
D
1 to 100 milli seconds
Question 92 1 Marks
Which codes are stored in computer ROM BIOS chip?
A
Change codes
B
Temporary codes
C
Permanent codes
D
Partial change codes
Question 93 1 Marks
What is the current rating of voltage regulator IC LM338K?
A
2A
B
3A
C
4A
D
5A
Question 94 1 Marks
What is the power dissipation of the standard TTL chip?
A
5 mW/gate
B
10 mW/gate
C
15 mW/gate
D
20 mW/gate
Question 95 1 Marks
Why transistors made of silicon is preferred over the germanium semiconductor material?
A
Complex design
B
Higher thermal stability
C
Requires complicated bias arrangement
D
Silicon transistor needs low cut-in-voltage
Question 96 1 Marks
How gate is biased in JFET?
A
AC supply function
B
Forward biased
C
Reverse biased
D
Dual supply function
Question 97 1 Marks
What is the effect on the current flow with increased diameter of conductor?
A
Resistance increases
B
Opposes more current
C
More voltage dropped
D
Allows high current flow
Question 98 1 Marks
What is the name of defect if the flux is unable to remove the tarnish from the soldered joint?
A
Cold joint
B
Poor wetting
C
Pits and voids
D
Dull gravity surface
Question 99 1 Marks
Which impurity is added to pure semiconductor to form N-type material?
A
Boron
B
Indium
C
Arsenic
D
Gallium
Question 100 1 Marks
Which memory device loses data on power failure?
A
RAM
B
ROM
C
Hard disc
D
CD ROM