| Post Name | TRADESMAN (Electronics and Instrumentation) - TECHNICAL EDUCATION |
|---|---|
| Question Paper Code | 077/2023 |
| Category Code | 766/2021 |
| Date of Test | 17 June 2023 |
| Medium of Question | ENGLISH |
| Exam Type | OMR Examination |
| Total Questions | 100 |
1
The voltage of a circuit is measured by a voltmeter having an input impedance
comparable with the output impedance of the circuit thereby causing error in voltage
measurement. This error is called
Answer
C. Error caused by loading effect
2
The quantity whose magnitude has a definite repeating time cycle is
Answer
A. Steady state periodic
3
The _____ is the retardation in the response of a measurement system to changes
in the measured quantity.
Answer
B. measuring lag
4
The units whose sizes cannot be chosen independently are called
Answer
A. derived units
5
What will be the value of shunt resistance required for 1 mA meter to extend the
range to measure 10 mA (meter resistance is 18 Ω) ?
Answer
B. 2 Ω
6
In mechanics three fundamental units are
Answer
B. length, mass, time
7
The dimension of power is
Answer
D. ml2T –3
8
Electrostatic type instruments are primarily used as
Answer
C. Voltmeter
9
In _________ instruments a small weight is attached to the moving system to produce
a controlling torque.
Answer
A. Gravity controlled
10
The __________ torque is necessary to avoid oscillations of the moving system
about its final deflected position.
Answer
D. damping torque
11
To extend the range of voltmeter which arrangement is used ?
Answer
A. High value of resistor in series with the meter
12
momentum =
Answer
B. mass × Velocity
13
The physical quantity under measurement is called
Answer
C. measurand
14
Error of an instrument is expressed as
Answer
A. (measured value − True value) × 100
True value
15
dead band is usually expressed in percentage of
Answer
D. Span
16
An undesired change in the output input relationship over a period of time is
Answer
A. drift
17
Which of the following is not a method for measuring low value resistance ?
Answer
D. Direct deflection method
18
Screen of the CRT is coated with
Answer
A. Phosphor material
19
The least interval between two adjacent discrete details which can be distinguished
one from the other is called
Answer
C. Resolution
20
An ammeter reads 15.34 Amps. The absolute error in the measurement is
– 0.11 Amps. determine the true value of current.
Answer
B. 15.45 Amps
21
PmmC stands for
Answer
B. Permanent magnet moving Coil meter
22
Induction wattmeter is used to measure
Answer
A. AC power
23
The deflection in moving coil galvanometer is
Answer
B. directly proportional to the number of turns of the coil
24
In a CRO, which circuit is provided for synchronising two type of deflections so that
horizontal deflection starts at the same point of the input vertical signal each time it
sweeps.
Answer
D. Trigger circuit
25
For making P type semiconductor, which material should not be added in extrinsic
semiconductor material ?
Answer
C. Arsenic
26
The difference of voltage across two points in a circuit is called
Answer
C. Potential difference
27
The ratio of flux created in that material to the flux created in air is
Answer
B. Permeability
28
Electrical property of an electrical circuit or device to oppose any change in
magnitude of current flow in a circuit is called
Answer
B. Inductance
29
An inductor stores an energy in the magnetic field created by the current. The energy
is expressed as
Answer
A. W = 1/2 LI²
30
Which of the following statement is/are correct about resistance offered by a
conductor depends ?
i. Resistance varies directly with its length
ii. Resistance varies by its crosssectional area
iii. Resistance of the conductor not depends on the material with which it is made of
Answer
A. Only i and ii
31
Which of the following statement is/are correct in case of parallel circuits ?
i. The applied voltage same across each branch
ii. The reciprocal of total resistance equals the sum of the reciprocal of the
resistance
iii. The resultant resistance is less than the smallest resistance of the parallel
combination
Answer
D. All of the above
32
What is the capacitance of a capacitor that requires 0.9 C to charge it to 30 V ?
Answer
D. 0.03 F
33
The capacitance of a capacitor is not determined by
Answer
B. material of the plates
34
Which law states that magnitude of the induced emf is equal to the rate of change
of flux linkage ?
Answer
C. Faraday’s law
35
When forward bias is applied to a PN junction diode, its
Answer
A. Potential barrier is reduced
36
The charge on N type semiconductor is
Answer
D. Electrically neutral
37
If one diode in the centre-tapped full wave rectifier opens, then rectifier output will be
Answer
C. Resembles output from a half wave rectifier
38
When transistor is used as a switch, it operates in
Answer
B. Cut off region and saturation region
39
In common base amplifier which of the following is wrong ?
Answer
C. Used for audio frequency application
40
In a transistor most of power is dissipated in collector-base junction. It is because
Answer
B. Collector base voltage is much greater than emitter-base voltage
41
Removal of emitter bypass capacitor from the common emitter amplifier results
Answer
A. Reduced voltage gain
42
In the following which is not the characteristics of emitter follower circuit ?
Answer
C. low input impedance and high output impedance
43
How many active devices are there in a single stage transistor amplifier ?
Answer
A. 1
44
The term not related to FET is
Answer
C. Intrinsic stand-off ratio
45
UJT cannot be used
Answer
C. As an amplifier
46
In the following components which can be used as controlled bidirectional switch ?
Answer
D. Triac
47
2’s complement of the binary number 00010110
Answer
B. 11101010
48
In the following logic gates, which cannot be used as an inverter ?
Answer
B. ANd GATE
49
According to distributive law
Answer
D. A(B + C) = A·B + A·C
50
For a full adder, determine the output for the input A = 1, B = 0, and carry in = 1
Answer
B. Sum = 0 with carry of 1
51
On chip program memory of 8051 microcontroller is
Answer
B. 4 KB
52
Name the register which points to the address of the next instruction to be
executed.
Answer
A. Program counter
53
From the following, which section comes first in SMPS with ac input ?
Answer
B. Rectifier
54
In boost converter circuit, input source is connected to output. At that time
Answer
D. Switching transistor is OFF and is connected in parallel with load
55
Inverter performs opposite function of
Answer
A. Rectifier
56
One of the following UPS has no transition time delay. It is
Answer
C. Online UPS
57
In the following, cell using photo voltaic effect is
Answer
A. Solar Cell
58
Which of the following is a type of volatile memory ?
Answer
D. RAm
59
Which of the following is not a component of a computer network ?
Answer
C. Keyboard
60
Which of the following technology was used by intel to design its first 8-bit
microprocessor ?
Answer
A. NmOS
61
Which of the following is a network topology ?
Answer
C. Bus
62
Which of the following is NOT a memory type ?
Answer
A. USB
63
Which of the following is NOT an operating system ?
Answer
D. Excel
64
Which of the following is the most commonly used architecture for personal
computers ?
Answer
B. CISC
65
EEPROm is basically a __________ memory.
Answer
C. Non-volatile
66
The Unix shell is both ____________ and ___________ language.
Answer
A. Interpreter, scripting
67
Which is the largest network in the world ?
Answer
D. Internet
68
The gauges that uses electrical devices for measuring pressure is
Answer
C. Both
69
Rotational displacement can be measured using
Answer
D. Shaft encoder
70
In lVdT, output voltage
Answer
C. Vary unequally depending on the core position
71
An open tank contains varying density liquid, the level of the tank is to be measured
accurately, the most suitable measuring system is
Answer
B. Float and cable
72
In Coriolis densitometer, for measuring densities of fluid in the pipe __________
parameter is measured.
Answer
D. Frequency of vibration
73
In an industrial pressure thermometer the sensing element is usually made of
Answer
Question Cancelled
74
The induced voltage generated in a electromagnetic flow meter is proportional to
Answer
A. Flow rate
75
load cell make use of which type of arrangements ?
Answer
C. Both tensile and compressive strain gauge
76
load cell converts
Answer
Question Cancelled
77
As the temperature increases, the thermal conductivity of a gas
Answer
A. Increases
78
Stroboscope measures
Answer
B. Frequency of vibrating object
79
In a resistance potentiometer high value of resistance of POT leads to
Answer
A. High value of sensitivity
80
The changes in resistance on application of strain in a semiconductor strain gauge
Answer
B. Is much higher than in metal strain gauge and is due to change in resistivity
81
In an RTd
Answer
A. Resistance increases with temperature rise
82
This acts as a quenching gas in Geiger muller Counter
Answer
A. Alcohol
83
This law makes it possible to use extension wires of a metal different from the
metals used for thermocouple
Answer
B. law of intermediate metals
84
Flame ionisation detector in the gas chromatography is used for the detection of
Answer
D. Hydrocarbons
85
If the reading of pH meter changes from 7 to 9, the hydrogen ion concentration of
the solution is
Answer
D. decreases 100 times
86
Bolometer measures
Answer
B. Intensity of electromagnetic radiation
87
The purpose of the reference electrode in a pH meter is to deliver
Answer
B. A constant voltage
88
Telemetry system which normally uses self balancing potentiometer at the
receiving end
Answer
A. Voltage telemetry system
89
In time division multiplexing
Answer
A. Entire bandwidth of the channel is dedicated to one speed channel for a short
period of time
90
Recorder which records the relationship between two variables
Answer
D. X-y recorder
91
The signal selected by a multiplexer is converted into a constant voltage by
Answer
C. Sample and hold circuit
92
A non-dispersive shifted fibre is
Answer
A. Standard single mode fibre
93
Process of changing resting potential to action potential is known as
Answer
C. depolarization
94
Sensitivity of an ECG is typically of
Answer
C. 10 mm/mV
95
Input to the controller is
Answer
C. Error
96
The capacitance in force-current analogy is analogous to
Answer
D. mass
97
It refers to the time for the process control loop to make necessary adjustments to
the final control element
Answer
D. Control lag
98
_____________ lets the computer adjust process-loop setpoints for optimum process
performance using standard analog control loops for control.
Answer
A. Supervisory control
99
The master terminal unit in the SCAdA system can be a
Answer
D. All of the above
100
PlC scan time is the time taken to
Answer
D. Reading all the input signals, run the program and updating outputs
Discussion
Ask a doubt or share a tip.
No comments yet — start the discussion.