CUSAT CAT 2019 Question Paper Instrumentation

CAT 2019 – INSTRUMENTATION

019
2
S T
E
1. Pascal is the unit for
T
N
(A) weight O
(B) pressure SI
(C) conductivityIS
M
M
(D) frequency
D
A

2. N
Which one of the following is necessary to observe interference?
O
M Two sources of light of same frequency
O
(A)
M
E
CO (C) Two sources of light with same frequency and definite phase relationship
(B) Two sources of light with different frequencies

SAT
C T
(D) Two sources of light with different wavelengths

CU 3.
AT N
A superconducting material in the super conducting state is

19
S IO 0
(A) paramagnetic
(B) diamagnetic
2
U S
(C) ferromagnetic
(D) None of the above
ST
4. C IS N
T E
Josephson effect is associated with
O
(A)
(B)
M IS
S I
tunneling of single electron
tunneling of electron pairs
(C)
(D)
D normal current
M
None of the above

5. A N
A
D
Double refraction is exhibited by
O
(A)
(B)
Water
NaCl M
(C) Calcite M
(D) Oxygen
C O
AT
S
CU

6. The following symbol refers to

019
2
S T
E
(A) FET T
(B) n-channel MOSFET N
O
(C) I
p-channel MOSFET
S
(D)
IS
None of the above
M
7. In the circuit
D
M
Ashown below, V is a constant voltage source and I is a constant current
S L

load. TheNvalue of I that maximizes the power absorbed by the constant current load is
O L

M

SA
T
CO
M
O
CU
AT N 19
S IO
VS
(A)
4R
2 0
U S
VS
(B)
2R
ST
(C)
C IS
VS
R
O
N
T E

M I
(D) ∞
S
IS
8.
D M
For a parallel RLC circuit, which one of the following statements is NOT CORRECT?

(A)
(B)
(C)
A O
N
A
D
The bandwidth of the circuit decreases if R is increased.
The bandwidth of the circuit remains same if L is increased.
At resonance, input impedance is a real quantity.
(D)
M
At resonance, the magnitude of input impedance attains its minimum values.

M
C O
AT
S
CU

9. The gain magnitude of 10 kHz, 60 dB/decade high-pass Butterworth filter for the 1 kHz

19
signal would be

(A) – 20 dB 20
(B) – 40 dB
S T
E
(C) – 60 dB
(D) – 80 dB T
N
O
Filter that eliminates S
I
IS
10. a narrow band of frequencies is referred as

(A) low pass M

M
filter
(B) highA D
pass filter

(C) band
(D) O
N pass filter
notch filter
M

SA
11. O
M
T (A) 632.8 nm O
C The wavelength of Helium-Neon Laser beam is

CU
T
(B) 452 nm

N
(C) 589.00 nm

A 9
(D) 380.00 nm
1
12.
S IO 2 0
Ejection of electron in the innermost orbital leads to the emission of

(A)
(B)
(C)
U
C IS S
UV-radiation
IR radiation
X-ray T E ST
(D) Visible radiation N
O
M IS
S I
D
13. One electron volt is equivalent to

M
A D
(A) 1.6 x 10-10 joule
(B)
(C) A
1.6 x 10-13 joule
1.6 x 10-16 joule
(D) N
1.6 x 10-19 joule
O
M
14.
M
Ratio of equivalent capacitance of three capacitors of capacitance 8 µF, 12 µF and 24 µF
O
connected in series to that of capacitors connected in parallel is
C
(A)
(B)
11:1
1:11 AT
(C) 1:1 S
(D) 3:1
CU

15. A current i(t) shown in the figure below is passed through a 1 F capacitor that had zero

19
initial charge. The voltage across the capacitor for t > 2s is

20
S T
E
T
N
O
SI
(A) 0V IS
M
M
(B) 1V
D
(C) 4V
A

(D)
N
8V
O
M
M
O
16. Efficiency of bridge rectifier is

SAT
CO (A) 20.3%
(B) 40.6%
T
(C) 60.9%
CU
N
(D) 81.2%

17. A
S IO
The general formula for alkynes is
2 0 19

U S T
(A) C n H 2 n+ 2
S
C IS E
(B) C n H 2 n
(C) C n H 2 n −2 T
N
(D) C n H 2 n −1
O
M IS
S I
18.
D M
Which of the following contributes to the broadening of laser emission bandwidth?

(A)
(B)
(C)
(D)
A A
D
Doppler shift of moving atoms and molecules
Amplification within the laser medium
N
Coherence of the laser light
O
Optical pumping of the laser transition
M
Mlayers are
19. O
When a JFET is cut-off, the depletion
C
(A) far apart
(B) close together A T
(C) touching
(D) conducting U
S
C

20. In bipolar transistors, dc current gain is
019
IC
2
(A)
IE S T
E
IC T
(B) N
O
IB
SI
(C)
IE
IS
M
M
IB
I A
D

E
(D) N
OI C

M

S
21.

AT
M
COIn10 the O
circuit given below, each input terminal of the op amp draws a bias current of
nA. The effect due to these input bias currents on the output voltage V will be zero, if
the value of R chosen is
o

CU
AT N 19
S IO 2 0
U
C IS S T E ST
N
O
M IS
S I
D
(A) 20 kΩ
(B) 30 kΩ
M
A
(C) 60 kΩ
(D) 90 kΩ D
A
N
O
M
M
C O
AT
S
CU

22. Assuming the diode ‘D’ used in the circuit below is ideal, the voltage drop Vab across the
1kΩ resistor is
019
2
S T
E
T
N
O
SI
IS
M
D
M
(A) 5V
(B) 3V A

(C) N
2V
(D) O
0V
M

S
23.

AT
M
CONorton’s O
theorem states that a complex network connected to a load can be replaced with
equivalent impedance

CU
T
(A) in series with a current source

N
(B) in parallel with a voltage source
(C)
(D)
A
in series with a voltage source

S IO
1
in parallel with a current source
2 0
9
24.
U S ST
The parameter that indicates how fast the output of an op amp can vary for the input

C IS
variations is
T E
(A) slew rate
N
(B)
O
unity gain bandwidth
(C)
(D)
M
open loop gain

IS
offset voltage S I
D M
A O
N
A
D

M
M
C O
AT
S
CU

25. The circuit in the figure is a

019
2
S T
E
T
N
O
SI
IS
M
D
M
(A) low-pass filter
(B) A
high-pass filter

(C) N
band-pass filter
(D) Oband reject filter
M

S
26.

AT
M
(A)
O E
COEach valence electron in an intrinsic semiconductor establishes a
C T
covalent bond

CU
T
(B) free electron

N
(C) hole

A 9
(D) recombination
1
S IO 2 0
27.
U
C IS S ST
Consider the following statements S1 and S2.

T E
S1. The  of the bipolar transistor reduces if the base width is increased,
N
S2. The  of the bipolar transistor increases if the doping concentration in the base is
O
M
increased.

IS
S I
D
Which remarks in the following is CORRECT?
M
A
(A) S1 is FALSE and S2 is TRUE
(B) D
Both S1 and S2 are TRUE
(C) A
Both S1 and S2 are FALSE
(D) N
S1 is TRUE and S2 is FALSE
O
M
M
C O
AT
S
CU

28. Consider the following statements for metal oxide semiconductor field effect transistor

19
(MOSFET). Which of the statements are TRUE?
0
2 state current increases,
P. As channel length reduces, OFF

S T output resistance increases
Q. As channel length reduces,
E
R. As channel length Treduces, threshold voltage remains constant
N reduces, ON current increases
O
S. As channel length

S I
(A) P and Q IS
(B) P and S M
(C) Q and D
AS
R
M
(D) R and
N
O
M
M
O
29. A differential amplifier has a common mode gain of 0.02. It has +200 mV signals applied

CO
E
to each of the inputs. The amplitude of the output signal is

SA T (A) 0 V
C T
T
(B) 8 mV
CU
N
(C) 4 mV

A
(D) None of the above

19
30.
S IO
The term critical angle describes 2 0
(A)
(B)
(C)
U
C IS S E ST
the point at which light is refracted
the point at which light becomes invisible
T
the point at which light has gone from the refractive mode to the reflective mode
(D) N
the point at which light has crossed the boundary layers from one index to another
O
M IS
S I
D
31. How many semiconductor layers are in SCR?

(A) two M
(B)
(C)
(D)A three
four
six
O
N
A
D

M
M
C O
AT
S
CU

32. The output Y of the logic circuit given below is

019
2
S T
E
(A) ‘1’ T
(B) ‘0’ N
O
(C) X
SI
(D) X́
IS
M
33. Which one A
D
M
of the following is invalid state in an 8-4-2-1 binary coded decimal counter?

(A) O
N
1001
(B)M 1 0 0 0

A T
O
M
(C) 0 0 1 1
C (D) 1 1 0 0 O
S 34. Which of the following types of ADC requires S/H?
CU
(A)

AT N
Successive approximation type
19
S IO
(B) Integration type
(C) Flash
2 0
U
(D) Sigma-Delta

35.

C IS S T E ST
The range of signed decimal numbers that can be represented by 6-bits 1’s complement
number is
N
O
M I
(A) – 31 to +31
S
IS
(B) – 63 to +63

D
(C) – 64 to +63
(D) – 32 to +31
M
A O
N
A
D

M
M
C O
AT
S
CU

36. A JK flip-flop can be implemented by T flip-flop. Identify the correct implementation.

019
(A) 2
S T
E
T
N
(B)
O
SI
IS
M
(C) A
D
M
N
O
M

SAT
CO
M
(D)
O
CU 37.
T N
The outputs of two flip-flops Q1, Q2 in the figure shown are initialized to 0, 0. The

A 19
S IO
sequence generated at Q1 upon application of clock signal is

2 0
U
C IS S T E ST
N
O
M IS
S I
(A)
D 01110……..
M
A D
(B) 01010……..
(C)
(D)
00110…….
01100……. A
N
O
M
M
C O
AT
S
CU

38. Decimal 43 in Hexadecimal and BCD number systems is respectively

(A) B2, 0100 011
019
(B) 2B, 0100 0011 2
(C)
(D)
2B, 0011 0100
B2, 0100 0100 S T
E
T
N
O
39.
I
The 16-bit 2’s complement form of an integer is 1111 1111 1111 0101. Its decimal
S
IS
representation is

M
M
(A) 10
D
(B) – 11 A

(C) N
– 10
(D) O
–7
M

S
40.

AT
M
shown below?
O
COWhich one of the logic gate function with P and Q inputs is implemented by the circuit

CU
AT N 19
S IO 2 0
U
C IS S T E ST
(A) AND
N
(B) OR
O
(C)
(D)
M
XNOR
XOR
IS
S I
D M
A O
N
A
D

M
M
C O
AT
S
CU

41. In a Wheatstone bridge, each arm has a resistance R. One of the arms has a resistive
sensor whose nominal resistance is also R and it changes to R + R on environmental
19
condition where R << R. The bridge is excited by a dc voltage E i. What is the output
0
voltage on account of unbalance? 2
S T
E
∆R
T
( )
(A)
R
E
∆R i O
N

2+
R SI
IS
∆R
M
( )
(B)
R
A
D
E
∆R i
M
N
4+
O R
M

SAT
M 2 ∆RR
( )
CO (C)
4+ O
C T
∆R
R E Ei

CU
(D) T
( ) A ON
∆R
R
E
19
S I
∆R i
4 +2
R
2 0
42. U
C IS S
Match the Following:
T E ST
P. Radiation Pyrometer
N W. Angular velocity measurement
O
M I
Q. Dall tube X. Vacuum pressure measurement
S
IS
R. Pirani gauge Y. Flow measurement

D
S. Gyroscope
M Z. Temperature measurement

A
(A)
(B)
(C)
(D)
P  Z,
P  Z,
P  W,
P  Z,
A
D Q  W,
Q  Y,
Q  X,
Q  X,
R  X,
R  X,
R  Y,
R  W, O
SY
SW
N
SZ
SY
M
M
43.
print region? C O
In infrared spectroscopy, which one of the following frequency ranges is known as finger

(A) 4000 – 2000 cm A
T
(B) 2000 – 1450 cm S
-1

(C) 1450 – 500 cmU
-1

C
-1

(D) 500 – 200 cm-1

019
2
S T
E
T
N
O
SI
IS
M
A
D
M
N
O
M

SAT
CO
M
O
CU
AT N 19
S IO 2 0
U
C IS S T E ST
N
O
M IS
S I
D M
A O
N
A
D

M
M
C O
AT
S
CU

44. In strain measurement, dummy strain gauges are used in bridge circuits for the purpose of

(A) calibration
019
(B) increasing sensitivity 2
(C)
(D)
temperature compensation
improving linearity S T
E
T
N
O
45.
I
Which one of the following is used for signal conditioning of a piezoelectric type
S
IS
transducer?

M
M
(A) An instrumentation amplifier
D
(B) A
A trans-conductance amplifier

(C) N
A charge amplifier
(D) O
A logarithmic amplifier
M

S
46.

AT
COAn
M
O
ac voltmeter is connected at the output of a LVDT and the LVDT is supplied with a
sinusoidal voltage of amplitude 5 V and frequency 1 kHz. For a displacement of 1 mm
from the null position, the voltmeter shows a reading of 2 V. What would be the reading

CU position?

AT
of the voltmeter, if the displacement is 1 mm in the opposite direction from the null

N 19
S IO 0
(A) –2V
(B) – 0.2 V 2
U S T
(C) 0.2 V
(D) 2V
S
47. C IS N
T E
Liquid flow rate is measured using
O
(A)

M
Pirani gauge

IS
S I
D
(B) Pyrometer
(C) Orifice plate
M
A
(D) Bourdon tube
D
A
48. N
Poynting vector provides
O
(A) direction of polarization
M
(B) rate of energy flow
M
(C)
(D)
intensity of electric field
C
intensity of magnetic field O
AT
S
CU

49. Which of the following diodes is used in switching circuits in microwave range?

(A) PIN diode
019
(B) Tunnel diode 2
(C)
(D)
Varactor diode
Gunn diode S T
E
T
N
O
50.
I
Which one of the following instruments is more powerful to study the surface details of a
S
IS
specimen?

M
M
(A) Phase contrast microscope
D
(B) A
Scanning Electron Microscope (SEM)

(C) N
Transmission Electron Microscope (TEM)
(D) O
Light microscope
M

S
51.

AT
M
COIfstrain O
L, D, ρ and R are respectively the length, diameter, resistivity and resistance of the
gauge, the gauge factor of the strain gauge is defined as

CU
T
∆ L/ L

N
(A)
∆ R/ R
(B)

(C)
A
∆ R/ R

S IO
∆ L/ L
∆ R/ R
2 0 19

U S
∆ D/ D
∆ R/ R
ST
C IS
(D)
∆ ρ/ ρ
T E
N
O
M
52. A resistance potentiometer is a

S I
IS
(A) first order instrument
(B)
(C)
D zero order instrument
M
second order instrument

A D
(D) None of the above
A
N
53.
O
Which of the following gauges measures absolute pressure in the range 10 to 10-6 torr?

(A) Pirani gauge M
(B) Penning gauge M
(C)
C
Hot-cathode ionization gauge O
(D) McLeod gauge

AT
S
CU

54. Superposition theorem is not applicable for

(A) current calculations
019
(B) voltage calculations 2
(C)
(D)
power calculations
reactance calculations S T
E
T
N
O
55.
I
Consider the following statements S1 and S2:
S
IS
S1 : At the resonant frequency the impedance of a series RLC circuit is zero.
S2 : In aM

M
D parallel GLC circuit, increasing the conductance G results in increase in
its QAfactor.

N
WhichOone of the following is CORRECT?
M

SAT
M
CO (B) O
(A) S1 is FALSE and S2 is TRUE

Both S1 and S2 are TRUE
(C) S1 is TRUE and S2 is FALSE
(D) Both S1 and S2 are FALSE

CU
56.

AT N 9
What is the equivalent resistance between points A and B in the network shown below?
1
S IO 0
1k
A
2 B

U S
2k 2k

ST
C IS E
(A) (2/3) k
(B) 1.5 k
T
(C) 0.5 k
N
O
M
(D) 2k

S I
IS
D M
A O
N
A
D

M
M
C O
AT
S
CU

57. If the following program is executed in an 8085 microprocessor, at the end of the

19
program the register A contains

Address Instruction 20
2000H XRA A
S T
E
2001H MVI B,04H
2003H MVI A, 03H T
N
2005H RAR
O
2006H DCR B SI
2007H IS
JNZ 2005
M
M
200AH HLT
(A) 30HA
D

N
(B) 60H
(C) O
06H
M 03H
O
(D)
M

SA
CO

T In which ‘T’ state, the 8085 microprocessor sends address to memory or I/O and activate
58.
‘ALE’ signal?

CU (A)
(B)

A
T1
T2T N 19
S IO 0
(C) T3
(D) T4
2
59.
U
C IS S E ST
Consider the following 8085 interrupts.
T
(1) TRAP (2) INTR (3) RST 6 (4) RST 7.5 (5) RST 0
N
O
Software interrupts in the above are

(A)
M1 and 3 only
IS
S I
D
(B) 2 and 5 only
(C) M
3 and 5 only

A D
(D) 1, 2, 3, 4 and 5
A
N
O
M
M
C O
AT
S
CU

60. For the op amp circuit shown in the figure, Vo is

019
2
S T
E
T
N
O
O 20 SI
(A)
(B)
–2V
–1V IS
M
D
M
(C) – 0.5 V
(D) 0.5 VA

N
O
M
O
61. Match the logic gates in column A with their equivalents in column B.
M

SAT
CO
CU
AT N 19
S IO 2 0
U
C IS S T E ST
N
O
M IS
S I
(A)
D M
P-2, Q-4, R-1, S-3

A D
(B) P-4, Q-2, R-1, S-3
(C)
A
P-2, Q-4, R-3, S-1
(D)
N
P-4, Q-2, R-3, S-1

O
62. ´
The Boolean expression ( Á+ B́+ M
Ć ) is equal to
M
(A) ( A.B.C)
C O
(B)
(C)
( A+ B+C )
( Á+ B́+ Ć )
AT
(D) ´
( A+ B+C ) S
CU

63. Which one of the following statements is CORRECT?

(A) 19
BJT and MOSFET are current controlled devices
0
(B) 2
BJT is voltage controlled and MOSFET is current controlled devices
(C)
(D) S T
BJT and MOSFET are voltage controlled devices
BJT is current controlled and MOSFET is voltage controlled devices
E
T
N
O
64.
I
Which of the following motors uses brushes?
S
(A) ac inductionIS
motor
(B) dc motorM
(C) stepperDmotor
A
M
N
(D) servomotor
O
M
O
M the sensor used in angular displacements.
65. Identify

SA
T
O
C (A) RTD
(B) LVDT
T
(C) Piezoelectric sensors
CU
N
(D) Potentiometer

66. A
S IO 0 19
Which one of the following codes is normally used in a digital linear displacement
transducer? 2
(A)
(B)
(C)
U
C IS S
Binary code
Binary coded decimal
Gray code T E ST
(D) ASCII code N
O
M IS
S I
D
67. The Fourier transform x (t )=e− at u (− t ), when u ( t ) is unit step function,

M
A D
(A) exists for any real value of ‘a’
(B)
(C) A
does not exist for any real value of ‘a’
exists if any real value of ‘a’ is strictly negative
N
(D)
O
exists if the real value of ‘a’ is strictly positive

M
M
C O
AT
S
CU

68. For a vector ⃗
E , which one of the following statements is NOT TRUE?

(A) ∇.⃗
⃗ E is called solenoidal
E=0 , ⃗
019
(B) E is called conservative
∇ × E =0, ⃗
⃗ ⃗ 2
(C) ∇×⃗
⃗ E =0, ⃗
S T
E is called irrotational
E
(D) ∇.⃗
⃗ E is called irrotational
E=0 , ⃗
T
N
O
69. I
Find out the wrong term in the number series given below.
S
S
3, 10, 27, 4, 16, 64,I 5, 25, 125, ……
M
(A) 3 A D
M
(B) 4 N
(C) O 10
M 27
O
(D)
M

S
T
70.
A
CO

Two pipes A and B can fill a tank in 6 hours and 4 hours respectively. If they are opened
on alternate hours and if pipe A is opened first, in how many hours, the tank shall be full?

CU (A)
(B)
4
5

AT N 19
S IO
(C) 4½
(D) 5½
2 0
71.
U
C IS S
Impulse is equal to change of

(A) velocity T E ST
(B) acceleration N
O
M I
(C) momentum
S
IS
(D) energy

D M
A D
72. If A, B, C, and D are vectors such that, C = A x B, and D = B x A, then the angle
A
between the vectors C and D is
N
(A) 0o
O
(B)
(C)
90o
180o M
(D) 270o M
C O
AT
S
CU

73. A box X contains 2 white and 4 black balls. Another box Y contains 5 white and 7 black

19
balls. A ball is transferred from the box X to the box Y. Then the ball is drawn from the
box Y. The probability that it is white is
20
(A) 16/39
S T
E
(B) 14/39
(C) 12/39 T
(D) 9/39 N
O
S I
74. IS ‘for’ loop is not correct?
Which of the following
M
(A) for(;A
D
M
x < 10 ;)

(B) N
for(; ; ;)
(C) O
for(; ;)
M
O
(D) for (x=0 ; x != 123;)
M

SA
CO

T Consider the following ‘C’ Programme.
75.
#include<stdio.h>

CU main()

AT
#include<conio.h>

N 19
S IO
{
float a = 1.2345;
2 0
U
printf(“%x”, a);
}

(A)
C IS S
0.2345
N
E ST
What is the output of the above ‘C’ programme?
T
(B) 1.2345
O
(C)
(D)
M
1
0
IS
S I
D M
A D
76. The prefix 'tera' refers to which one of the following power of 10?
A
(A) 1012
N
(B) 109
O
(C) 106
103 M
(D)
M
C O
AT
S
CU

77. The amount of heat required to raise the temperature of a unit mass of a substance by 1oK

19
is

(A) specific heat 20
(B) thermal capacity
S T
E
(C) calories
(D) latent heat T
N
O
I
A body is executing aSsimple harmonic motion. If 'a' is the amplitude, then its potential
ISwhen the displacement is
78.
energy is maximum
M
(A) +a/2A
D
M
(B) +aNor –a
(C) O– a/2
M
O
(D) zero
M

SA
CO

T Which of the following methods is suitable for flaw detection?
79.

CU
T
(A) Photography

N
(B) Radio frequency

A
(C) Laser

S IO
(D) Ultrasonic
2 0 19
80.

U
C IS
(A)
(B)
S
input node
output node T E
T
In signal flow graphs, node which has only outgoing branches is called
S
(C) mixed node N
O
M I
(D) general node
S
IS
D M 1

A
81. Inverse Laplace transform of is
D ( s +a )
A
N
−at
(A) e
(B)
O
+at
e
(C) 1 −e −at
M
M
−at
(D) 1+e

C O
AT
S
CU

82. The Dirac delta function δ(t) is defined as

(A) δ (t )= { 1 t=0
019
0 otherwise 2
(B) δ (t )= { ∞ t=0
S T
E
0 otherwise
T∞

(C) δ (t )= { 1 t=0 ∧
0 otherwiseON
∫ δ ( t ) dt=1

S I −∞
∞

IS ∧ ∫ δ ( t ) dt=1
(D) δ (t )= { ∞ t=0
0 otherwise
M
M
−∞

D
A

83. N
The process by which the glucose is partially broken down in the absence of oxygen is
called O
M

SAT
M
O
C T
(C) oxygen release
(D) reduction
E
CO (B) anaerobic respiration
(A) aerobic respiration

CU
84.

AT N
The following symbol refers to
19
S IO 2 0
U
C IS S T E ST
N
O
(A)
MTRIAC
IS
S I
D
(B) SCR
(C) UJT
M
A D
(D) Diode
A
N
85.
O
Instrument which measures force and velocity of wind and its direction is

(A) Anemometer M
(B) Barometer M
(C)
(D)
Barograph
Bolometer C O
AT
S
CU

86. The device used to determine the density and coefficient of expansion of liquids is

(A) Polymeter
019
(B) Photometer 2
(C)
(D)
Pykometer
Periscope S T
E
T
N
O
87.
I
The working of a refrigerator is based on the principle of
S
(A) Mechanics IS
M
M
(B) Thermodynamics
D
A
(C) Biomechanics

N
(D) Fluid dynamics
O
M
O
M the increase of pressure, the boiling point of the substance
88. With

SA
T
O
C (A) increases
(B) decreases
T
(C) remains the same
CU
N
(D) becomes zero

89. A
S IO
Loudness of sound depends upon
2 0 19

U S T
(A) frequency of the sound
(B) wavelength of the sound
S
C IS E
(C) amplitude of the sound
(D) pitch of the sound T
N
O
90.
M S I
Method to determine purity of a metal is based on

IS
(A)

D Boyle's law
M
A
(B) Pascal's law
(C) D
Archimedes principle
(D) A
Newton's law
N
O
91.
M
The image formed on the retina of the eye is
M
(A)
(B)
real and inverted
real and erect
C O
(C)
(D)
AT
virtual and erect
virtual and inverted
S
CU

92. A small piece of non-magnetised_________ material gets repelled when it is brought

19
near a powerful magnet.

(A) paramagnetic 20
(B) diamagnetic
S T
E
(C) ferrimagnetic
(D) ferromagnetic T
N
O
SInot exhibit
IS
93. Longitudinal waves do

M
M
(A) polarisation
D
A
(B) reflection

(D) O
N
(C) refraction
diffraction
M

SA
94. O
M
O
C T
T (A) refractive index E
C The phenomenon of splitting white light into several colours is called

CU
T
(B) dispersion

N
(C) scattering

A 9
(D) refraction
1
95.
S IO
One nautical mile is equivalent to 2 0
(A)
(B)
(C)
U
C IS S
1.44 x 1000 m
1.852 x 100 m
1.852 x 1000 m T E ST
(D) 1.44 x 100 m N
O
M IS
S I
D
96. The dimensional formula of work done is

M
A D
(A) M1 L1 T-1
(B)
(C)
M1 L2 T-1
M1 L-1 T-2A
(D) N
M1 L2 T-2
O
M
97.
M
Which of the following is not a conservative force?

(A) Electrostatic force
C O
(B)
(C)
Magnetic force
AT
Force in an elastic spring
(D) S
Frictional force

CU

98. What type of switch is this?

019
2
(A) Push button S T
E
(B) SPST T
(C) DPDT N
O
(D) SPDT
SI
IS
M
M
99. The ripple factor of full wave rectifier is
D
A

(A) 0.482
(B) O N
1.482
(C)M 1.21
M
O
(D) 0.21

SA T
100.
CO
Zener diode is operated in

CU (A)
(B)

AT N
forward region
reverse region

19
S IO
(C) breakdown region
(D) cut-off region
2 0
101.
U S ST
The sequence of colour band for 47K resistor with 5% tolerance should be

C IS
(A) T E
yellow,violet,yellow and silver
(B) N
yellow, yellow,orange and silver
O
M I
(C) yellow,orange,orange and gold
(D)
S
yellow,violet,orange and silver
IS
D M
A
102. Transistors used in digital circuits usually operate in the
D
(A) A
active region
(B) N
breakdown region
(C) O
saturation and cut-off region
(D) linear region M
M
C O
AT
S
CU

103. In a C-E configuration, an emitter resistor is used for

(A) stabilization
019
(B) AC signal bypass 2
(C)
(D)
collector bias
higher gain S T
E
T
N
O
104.
I
The collector current for a C-E configuration with a beta of 100 and a base current of
S
IS
30 µA is

M
M
(A) 30µA
D
(B) 3mA A

(C) N
0.3A
(D) O
3 µA
M

S
105.

AT
M
(A)
GS
O
saturated E
COWhen V = 0 V, a JFET is
C T
CU
T
(B) cut off

N
(C) open switch

A 9
(D) zero bias
1
106.
S IO 2 0
Which among the following is not an advantage of RC coupled amplifiers?

(B)
(C)
U
C IS
(A)
S
High fidelity
No core distortion
T
No impedance matching
E ST
(D) N
Wide frequency response
O
M IS
S I
D
107. Identify the true statement

M
A D
(A) CC amplifier has a large current gain
(B)
(C) A
CE amplifier has a large current gain
CB amplifier has low voltage gain
(D) N
CC amplifier has low current gain
O
M
108.
M
Hartley oscillator is commonly used in

(A) radio receivers
C O
(B)
(C) TV receivers AT
radio transmitters

(D) S
TV transmitters

CU

109. A Wien bridge oscillator uses

(A) only positive feedback
019
(B) only negative feedback 2
(C)
(D) zero feedback S T
both positive and negative feedback
E
T
N
O
110.
I
The crystal oscillator frequency is very stable due to
S
IScrystal
(A) rigidity of the
(B) vibrationsMof the crystal
(C) low Q D
A
M
of the crystal

N
(D) high Q of the crystal
O
M
O
MColpitt’s oscillator, feedback is obtained
111. In

SA T (B) by a tickler coil E
CO (A) by magnetic induction
C T
T
(C) from the centre of split capacitors
CU
N
(D) from the resistor

112. A
S IO 0 19
Input impedance of an emitter follower is
2
U S T
(A) zero
(B) low
S
C IS E
(C) high
(D) very low T
N
O
113.
M S I
The point of intersection of DC and AC load lines is called

IS
(A)

D saturation point
M
A
(B) cut off point
(C) D
operating point
(D) A
bypass point
N
O
114. The normal way to turn on a Diac is by
M
M
(A)
(B)
gate current
gate voltage
C O
(C)
(D) forward current
AT
break over voltage

S
CU

115. The technique used to determine the stability of op-amp is

(A) frequency response plot
019
(B) transient response plot 2
(C)
(D)
bode plot
polar plot S T
E
T
N
O
116.
I
For a PLL IC 565 with timing resistor and timing capacitor of about 15 kΩ and 0.02μF,
S
IS
the value of output frequency (f0) is

M
M
(A) 433.33 Hz
D
(B) A
833.33 Hz

(C) N
1000 Hz
(D) O
2500 Hz
M

S
117.

AT
M
(A) one
O
COThe number of resistors needed for designing 3 bit weighted resistor DAC is

CU
T
(B) two

N
(C) three

A 9
(D) four
1
118.
S IO
Choose the vector quantity 2 0
(A)
(B)
(C)
U
C IS S
Relative permeability

T E
Magnetic field intensity
Flux density
ST
(D) Magnetic potential N
O
M IS
S I
D M
A D
119. The ratio of intensity of magnetisation to the magnetisation force is

(A) A
relative permeability
(B) N
magnetic field intensity
(C) O
flux density
(D) susceptibility M
M
C O
AT
S
CU

120. A conductor of length L and current I is placed parallel to a magneticfield. The force

19
experienced by the conductor is

(A) BIL 20
(B) 2BIL
S T
E
(C) 3BIL
(D) 0 T
N
O
SIimplication of
IS
121. The Coulomb law is an

M
M
(A) Ampere law
D
(B) Gauss ASavart
law

(D) O
N
(C) Biot
Lenz law
law

M
CO
M
O E
122. Odd parity of word can be tested by

SA
T (A) OR gate
C T
CU
T
(B) AND gate

N
(C) NAND gate

A 9
(D) XOR gate
1
123.
S IO 2 0
The code where all successive numbers differ from their preceding number by single bit
is

(A)
(B)
U
C IS S
Binary code
BCD code T E ST
(C) Excess 3 code N
O
M I
(D) Gray code
S
IS
124.
D M
Fan-in and Fan-out are the characteristics of

A
(A)
(B)
(C)
(D)
Registers

N
A
D
Logic families

O
Flip flop
Combinational circuits
M
125. The four input MUX would have O
M
C
(A) 1 select line
(B) 2 select lines A T
(C) 3 select lines S
(D) 4 select lines U
C

126. Register, the digital device is a type of

(A) combinational circuit
019
(B) latches 2
(C)
(D)
CPU
sequential circuit S T
E
T
N
O
127.
I
The Instructions used by 8085 microprocessor for data transfer in I/O mapped I/O are
S
(A) IN, OUT IS
(B) STA addM
A
D add
(C) IN, LDA
M
N
(D) LDAX
O
M
O
M non-maskable interrupt in 8085 microprocessor is
128. The

SA
CO (A) RST 7.5
T (B) RST 6.5
T
(C) TRAP
CU
N
(D) INTR

129. A
S IO 0 19
The addressing mode used in instruction MOV M, C is
2
U S T
(A) direct
(B) indirect
S
C IS E
(C) immediate
(D) implicit T
N
O
130.
M S I
Which of the following memories needs to be refreshed frequently?

IS
(A)

D SRAM
M
A
(B) DRAM
(C) ROM D
(D) EPROM A
N
O
131.
M
Following type of sensors are used to generate information in object grasping and
obstacle avoidance.
M
(A) Hall effect sensor
C O
(B)
(C)
proximity sensor
light sensor AT
(D) S
magnetic sensor

CU

132. Which of the following is an analog transducer?

(A) Encoders
019
(B) Strain gauge 2
(C)
(D)
Digital tachometers
Limit switches S T
E
T
N
O
133.
I
The linear variable differential transformer transducer is
S
IS
(A) inductive transducer
Mtransducer
M
(B) capacitive
D transducer
A
(C) non-inductive

N
(D) resistive transducer
O
M
O
Mconcave mirror, size of the image depends upon
134. In

SA
T
O
C (A) size of object
(B) position of object

T
(C) area covered by object
CU
N
(D) shape of object

135. A
S IO 0 19
The ratio of phase difference to the path difference between two light waves is
2
U S T
(A)
S
C IS
(B) 2πλ

(C)
O
N
T E
(D)
M IS
S I
D M
136.

A
(A)
(B) O
N
D
The diameter of dark rings in Newton’s rings is
A
inversely proportional to the square root of odd numbers
directly proportional to the square root of natural numbers
(C)
M
directly proportional to the square root of odd numbers
(D)
M
inversely proportional to the square root of natural numbers

C O
137.
T
Plane polarised light can be produced by
A
(A) simple reflectionS
(B) Nicol’s prismU
C

(C) pile of plates
(D) All of the above
019
138. Modulus of rigidity of ideal liquid T
is
2
E S

(A) unity T
(B) finite N
O
(C) infinite
(D) zero S I
IS
M
139. The property D
A
M
by which a body returns to its original shape after removal of the force is

called N
O
(A)M plasticity

SA
T
O
M
(B) elasticity
C (C)
(D)
ductility
O
C T
malleability
E
CU 140.
T N
Which of these is a non-hookean material?

A 19
S IO
(A) Steel
(B)
(C)
Aluminium
Rubber 2 0

141.
(D)

U
C IS S
Copper

T E ST
If x = b + c, y = c a, z = a b, then x2 + y2 + z2 - 2xy - 2xz + 2yz is equal to
N
O
M I
(A) a+b+c
(B) 4b2
S
IS
D
(C) abc
(D) a2+b2
M
142.

(A)
A O
N
A
D
The matrix B=AT , where A is

skew symmetric
(B) M
symmetric about the secondary diagonal
(C) always symmetric
M
(D) another general matrix
C O
143. A T
If A and B are non-zero square matrices, then AB = 0 implies
S
U
(A) A and B are orthogonal
C

(B) A and B are singular
(C) B is singular
(D) A is singular
019
2
144. S T
The function f(x) = x3 - 6x2 + 9x + 25 has
E
T
(A) N
A maxima at x= 1 and a minima at x = 3
O
(B)
(C) SI
A maxima at x = 3 and a minima at x = 1
No maxima, but a minima at x = 1
(D) IS
A maxima at x = 1, but no minima
M
A
D
M
N
145. The interval in which the Lagrange's theorem is applicable for the function f(x) = 1/x is
O[-3,3]
M
(A)
M
O
(B) [-2,2]

SA
T
O
C (C) [2,3]
(D) [-1,1]

CU 146.
T N
The mathematical perception of gradient is

A 19
S IO
(A) slope
(B)
(C)
arc
chord 2 0
U S T
(D) tangent
S
147.
C IS T E
The divergence of the vector xi+yj+zk is

O
N
M I
(A) 0
(B) 1
S
IS
D
(C) 3
(D) 2
M
148.
A A
D
The cell in which electrical energy is converted to chemical energy is

(A) O
N
galvanic cell
(B) voltaic cell
M
(C) electrolytic cell
M
(D) electrochemical cell
C O
149.
AT
Sea water can be converted into fresh water by
S
(A) osmosis
CU

(B) sedimentation
(C) diffusion
(D) reverse osmosis
019
2
150. Sky looks blue due to S T
E
T
(A) transmission N
O
(B)
(C)
dispersion
reflection SI
(D) scattering IS
M
A
D
M
N
O
M

SAT
CO
M
O
CU
AT N 19
S IO 2 0
U
C IS S T E ST
N
O
M IS
S I
D M
A O
N
A
D

M
M
C O
AT
S
CU

INSTRUMENTATION 9 - ANSWER KEY
1
20 CODE: 617
TEST
QN. NO. KEY QN. NO. KEY QN. NO. T KEY QN. NO. KEY QN. NO. KEY
E S

1 B 26 A 51 T B 76 A 101 D
2 C 27 D N
O52 B 77 A 102 C

I
3 B 28 C
ISS 53 D 78 B 103 A
4 B 29 C M 54 C 79 D 104 B
5 C 30 C AD 55
M D 80 A 105 A

6 C 31 CN 56 C 81 A 106 C
OA
7 B 32 M 57 B 82 D 107 B
8
9
10
D
C
D
33
34 T C
SA
35
O
M D
A
A
O
C TE
59
60
58
C
C
A
84
85
83
A
A
B 108
109
110
A
C
D
11
12
A
C
U
C 36
37
B
D
AT N
61
62
D
A
86
87
1
C
9
B
111
112
C
C
13 D 38 B
S I O63 D 88
2 0 A 113 C

U S
14 B 39 B 64 B 89 C 114 C
15 D 40 D 65 D ST
90 C 115 C
16
17
D
C
41
42 C IS
D
B
66
67
C
C
O
N
T E 91
92
A
B
116
117
B
C
18 A 43 C
M 68
IS
D
S I 93 A 118 B

D
19 C 44 C 69 C 94 B 119 D
20 B 45 C 70 M B 95 C 120 D
21
22
23
A
D
D
46
47
48
A D
C
B
71
72
O
73
N
A
D C
C
A
96
97
98
D
D
D
121
122
123
B
D
D
M
24 A 49 A 74
MB 99 A 124 B

CO
25 A 50 B 75 D 100 C 125 B

AT
S
CU

019
2
QN. NO. KEY
S T
TE
126 A
127 A N
O
128 C SI
129 B IS
M
130 B A
D
M
131 B N
O
132 B M
133
134
135
A
B
A SA
T
CO
M
O
C TE
136
137
B
D
CU
AT N 19
138 D
S I O 2 0
U S
139 B
140 C ST
141
142
B
A C IS O
N
T E
143 A
M IS
S I
D
144 A
145 C M
146
147
148
A
C
A
A O
N
A
D

M
149 D
M
CO
150 D

AT
S
CU