Instrumentation Engineering Skills Test
f=∑(0,3,7,11,14) + d∑(5,12,15)
(Where 'd' denotes don't care condition)
a. Ā.C
b. A.B
c. C.D
+ A.B
d. C.D
What
would be the decimal number of the following excess-3 code?
Excess-3 code = 1010 0101
a. 27
b. 52
c. 67
d. 72
This
question is based upon the figure shown below
In
the above figure, initial value of the base current is 30 µA and the beta
rating of the component is 300. If the base current (IB) increases
from 30 µA to 60 µA, then what would be the change in the value of the
collector current(Ic)?
a. 6 mA
b. 7 mA
c. 8 mA
d. 9 mA
If
the H+ concentration is 3.0*10-3 M, then the pH value of
a solution will be ______________.
a. 4.52
b. 3.52
c. 2.52
d. 1.52
A
light dependent resistor has a resistance of 200 ohms at a certain light level.
It can only handle a current of 20 milliamps before it risks heating up.
If
the LDR (Light Dependent Resister) is connected to a 40V supply, what would be
the value of resistor we place in series?
a. 1600
ohms
b. 1650
ohms
c. 1700
ohms
d. 1800
ohms
Which
of the following statements is/are false?
(1) Fuzzy logic follows the principle of
Aristotle and Buddha.
(2) The AND, OR, and NOT logical operators of
Boolean logic are called Zadeh operators in Fuzzy logic.
a. (1)
only
b. (2)
only
c. Both
(1) and (2)
d. None
of the above
If
the refractive indices for the core and cladding of an optical fibre are 1.7
and 1.5 respectively. What would be the acceptance angle of the optical fibre?
a. 53.1
degree
b. 49.1
degree
c. 33.1
degree
d. 38.1
degree
State
True/ False:
The
system y(t) = 4x2(t) is time invariant.
a. True
b.
False
If a
sinusoidal wave of angular frequency 1400 rad/s applied to the Y-Y plates of a
Cathode Ray Oscilloscope produces six horizontal tangent points and five
vertical tangent points, then what would be the frequency of the sinusoidal
waveform applied to the X-X plates?
a. 1680
rad/s
b. 1750
rad/s
c. 1820
rad/s
d. 1875
rad/s
The
meter constant of 6A, 220V dc watt-hour meter is 3365 revolutions per kWh. What
would be the number of revolutions in one minute?
a.
70.03 r.p.m
b.
64.03 r.p.m
c.
69.03 r.p.m
d.
74.03 r.p.m
This
question is based upon the figure shown below
A
four-arm a.c. bridge network is shown in the figure above whose arms PQ has a
non-reactive resistor of 1400Ω in parallel with a condenser having capacitance
of 0.5µF, QR has a non-reactive resistor of 700Ω, RS has an unknown inductive
resistor and SP has a non-reactive resistor of 400Ω. If it is given that the network is balanced, what
would be the values of the unknown resistance and inductance across RS?
a. Rx
= 250Ω, Lx = 240 mH
b. Rx
= 220Ω, Lx = 200 mH
c. Rx
= 200Ω, Lx = 140 mH
d. Rx
= 150Ω, Lx = 140 mH
This
question is based upon the figure shown below
The
inverse Discrete Fourier Transformation of x(n), an N-periodic signal can be expressed
as ______________.
a. 1
b. 2
c. 3
d. 4
This
question is based upon the figure shown below
A
4-bit serial-in parallel-out shift register is given in the above figure. Its
initial contents are given as 0101. If three clock pulses (CLK) are applied
then what would the final contents of the shift register be?
a. 0000
b. 0101
c. 1010
d. 1111
An
8-bit digital to analog converter uses BCD input and produces a full-scale
output of 9.90 Volt. What would be the analog output for the BCD input 1001
0101?
a. 9.9V
b. 9.5V
c. 8.9V
d. 8.5V
Which
of the following gates is a universal gate?
a. AND
gate
b. XNOR
gate
c. XOR
gate
d. NAND
gate
This
question is based upon the figure shown below
A
potential divider circuit is given in the above figure. What would be its
output voltage (Vout), if the supplied voltage (VS) is
8V?
a. 1.29
V
b. 2.29
V
c. 3.26
V
d. 3.23
V
This
question is based upon the figure shown below
What
would be the voltage across the diode D1 in the above circuit?
a. 5V
b. 1V
c. 0V
d. 4V
e. None
of the above
Which
of the following are the main modules of a mass spectrometer instrument?
I) Mass analyzer
II) Extraction system
III) Detector
IV) Ionizer
a. I,
II, and III
b. I,
III, and IV
c. II,
III, and IV
d. I,
II, III, and IV
A
3mA meter having internal resistance of 100 ohm is to be converted to 0-160mA
ammeter. What would be the value of the shunt resistance required?
a.
1.911 ohm
b.
1.351 ohm
c.
1.221 ohm
d.
2.121 ohm
Which
of the following statements is false?
a.
Hydraulic systems are generally more difficult to operate as compared to
pneumatic applications.
b. Most
hydraulic applications generally use bigger components than pneumatic
applications.
c.
Hydraulic system is operated with compressed air while Pneumatic system is
operated by pressurised oil.
d. None
of the above
This
question is based upon the figure shown below
What
would be the period (T) of the periodic signal as shown in the above image?
a. π/2
b. π/4
c. π/3
d. π/6
This
question is based upon the figure shown below
Which
of the following is the simplified form of the Boolean expression as given in
the above figure?
a. AB
b. BC
c. 2BC
d. None
of the above
This
question is based upon the figure shown below
A
closed loop of voltages is given in the above figure. According to the
Kirchhoff's second law, V1+V2+V3+V4=
______________.
a. 1
b. 0
c.
Infinite
d. None
of the above
This
question is based upon the figure shown below
What
would be the value of IC from the above circuit?
a. 19.9
mA
b. 14.9
mA
c. 17.9
mA
d. 21.9
mA
If a
clamper has a capacitor of capacitance, C = 0.02µF and resistance, R=400 KΩ,
then what would be the total discharge time for the capacitor?
a. 4 ms
b. 4.5
ms
c. 20
ms
d. 40
ms
Which
of the following statements is false about Linear Convolution?
a. The
length of the input sequence can be different.
b. Zero
padding is not required.
c.
Output sequence is non-periodic.
d. The
length of the output sequence will not be greater than the length of input
sequences.
e. None
of the above
This
question is based upon the figure shown below
An
array from the polynomial s4 + 2s3 + 6s2 + 2s
+ 20 is given above to apply Routh criterion. What would be the value of the
term indicated as "??" in the given array?
a. -4
b. 5
c. -6
d. 20
This
question is based upon the figure shown below
State
True/ False:
The
given system as shown in the above image is non-linear.
a. True
b.
False
To
convert a JK flip-flop into a T flip-flop, what would be the input values of J
and K?
a.
J=K=0
b.
J=K=1
c. J=0,
K=1
d. J=1,
K=0
e. None
of the above
State
True/False:
An
operational amplifier produces an output voltage that is typically hundreds of
thousands of times larger than the voltage difference between its input
terminals.
a. True
b.
False
This
question is based upon the figure shown below
To
measure the capacitive impedance at a frequency of 3 kHz, a capacitance
comparison bridge is used. Choose the correct equivalent series circuit of the
unknown impedance if the bridge constants at bridge balance are given as:
C3 = 11 µF, R1 = 1.3 kΩ, R2 = 110 kΩ, R3 = 130
kΩ
a. 1
b. 2
c. 3
d. 4
This
question is based upon the figure shown below
What
would be the value of current through resistance R1 in the above circuit?
a. 32.8
mA
b. 38.5
mA
c. 42.3
mA
d. 52.5
mA
This
question is based upon the figure shown below
From
the above circuit diagram, what would be the approximate value of unknown
voltage V1?
a. 2V
b. 3V
c. 4V
d. 5V
Which
of the following statements is false about Voltmeter?
a. It
is a voltage-measuring device, which measures potential difference between the
two points of a circuit.
b. It
is always connected in parallel with the circuit.
c. Its
resistance is very less.
d.
Deflecting torque in voltmeter is produced by a current, which is proportional
to the voltage to be measured.
What
would be the cut-off frequency, if a low-pass filter is built with a 20 nF
capacitor and a 10 KΩ resistor?
a.
796.2 Hz
b.
596.3 Hz
c.
630.4 Hz
d.
581.2 Hz
If
400 fringes cross the centre of the field of view by moving one mirror through
a distance of 0.1347mm in a Michelson Interferometer, then what would be the
wavelength of the light?
a. 4323
Å (Angstrom)
b. 5388
Å (Angstrom)
c. 6735
Å (Angstrom)
d. 8321
Å (Angstrom)
Which
of the following statements is false?
a.
Piezoelectric materials are crystalline materials which when compressed along
one of its axes; acquire an electrostatic charge on opposite faces of material.
b.
Piezoelectric transducers are active transducers and do not require any
external source of energy.
c.
Piezoelectric transducers can be used to measure only limited number of
quantities.
d. A
piezoelectric transducer has very low DC output impedance.
e. None
of the above
This
question is based upon the figure shown below
State
True/False:
The Signal
shown in the above image is periodic.
a. True
b.
False
Which
of the following Boolean algebra expressions is incorrect?
a.
A+A.B = A
b.
A.(A+B) = A
c. A.1
= 1
d. A+1
= 1
State
True/False:
When
the Wheatstone bridge is balanced, the current through galvanometer is zero.
a. True
b.
False