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IV V Year – Instrumentation Engineering Section-I: General Ability 1.
For or all positive numbers x and y which of following functions is f(x f(x-y) y) = f(x) - f(y) 2 (A) f(A) = a (B) f(A)= a+1 (C) f ( A ) = a (D) f(A)= -3a
2.
Find the wrong number in the series 2, 6, 29, 146, 877, 6140 (A) 6140 (B) 2 (C) 29
(D) 6
3.
In the sentence given below, pick up one option, which is most nearly same in meaning as the word printed in bold, and can replace it without altering meaning meaning of sentence. Being a member of this club, he has certain rights. (A) status (B) truth (C) virtues (D) privileges
4.
In the following question, choose the word which is the exact OPPOSITE of the given word. NIGGARDLY (A) Frugal (B) Thrifty (C) Stingy (D) Generous
5.
Pick out the most effective word from the given words to fill in the blank to make the sentence meaningfully complete. If negotiations are to prove fruitful, there must not only be sincerity on each side, but there must also be ........... in the sincerity of the other side. (A) Faith (B) Belief (C) Substance (D) Certainty
6.
B and C working together can do a job in 24 days. After working together for 15 days, B left. C took 15 more days to do the remaining job. If B works alone, in how many days can he finish the job? (A) 30 (B) 40 (C) 48 (D) 60
7.
A dishonest dealer marks up the price of his goods by 20% and gives a discount of 10% to the customer. Besides, he also cheats both his supplier and his buyer by 100 grams while wh buying and selling 1 kilogram. Find the percentage profit earned by the shopkeeper. (A) 30 (B) 35 (C) 32 (D) 29
8.
In a group of 6 boys and 4 girls, 4 children are to be selected. In how many different ways they can be selected such that atleast 2 boys b are there? (A) 100 (B) 205 (C) 185 (D) 211 SPACE FOR ROUGH WORK
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IV V Year – Instrumentation Engineering 9.
80 percent of the employees in a company are male. 10 percent of the employees in the company are currently in Tamilnadu. Of the employees in Tamilnadu, 40 percent are in Chennai, 40 percent are in Coimbatore, and 20 percent are in Trichy. Of the employees at Chennai, 75 percent are male. What percent of the company's female employees are currently in Chennai? (A) 18 percent (B) 15 percent (C) 21 percent (D) 6 percent
10.
Average traffic at Paradise Paradis X roads during Monday-Thursday Thursday is 21 vehicles per minute. The respective value during Thursday Thursday-Sunday Sunday is 28 vehicles per min. Which of the following values are possible for average traffic for all days (in vehicles per minute)? (i) 16 (ii) 20 (iii) 28 (A) Only ii (B) ii and iii (C) i and iii (D) i, ii, and iii
11.
You win some and loose some. You must enjoy winning. But do not let it go to the head. The moment it does, you are already on your way to failure. If you encounter a failure, don’t beat bea yourself for it or anyone else for that matter. Accept it, look at your own share in the problem, learn from it and move on. Choose the summary: (A) Where there is a will there is a way (B) Failure is the stepping stone of success (C) Winners don’t do different things, but do things differently. (D) When you lose, don’t n’t lose the lesson
12.
Janak is participating in a 180 km bike race. Janak rides at an average speed of 30 km per hour for the first one-third third distance, 20 km per hour for f the next one-third third distance, and 10 km per hour for the final 60 km. What was Janak’s average speed for the race? (A) 15 km/h (B) 16.67 km/h (C) 22.5 km/h (D) 16.36 km/h
13.
In question below, there is a sentence of which some parts has been jumbled up up. Rearrange these parts, which are labeled P, Q, R, and S to produce the correct sentence. Choose the proper sequence. It would (P) appear from his statement (Q) about the policy of management (R) in dealing with the strike (S) that he was quite in the dark d The proper sequence should be: (A) RPSQ (B) PSQR (C) RQPS (D) PRQS SPACE FOR ROUGH WORK
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IV V Year – Instrumentation Engineering 14.
There are 65 questions in a 3 hr examination. Among these questions there are 15 general aptitude problems. It is suggested that two two-thirds thirds as much time be spent on each general aptitude problem as for each other question. How many minutes should be spent on general aptitude problems? (A) 30 (B) 45 (C) 50 (D) 60
15.
According to the Sci-True True Lab, the new micro micro-organism organism is discovered in certain lakes was identified once as spherical, once as cubical, and once as spiral, but has never been seen to assume the same shape twice. Which of the following is implied in the above statement? (A) The new micro-organism organism can be expected eventually to assume every possible shape. (B) The new micro-organism organism is different from all organisms previously known. (C) The Sci-True True Lab is not a reliable source of information about the new micro-organism. micro (D) The new micro-organism organism can be identified on the basis of some characteristic other than shape.
16.
Choose the best inference from the given statement Statement:: If it does not rain throughout this month, most farmers will be in trouble this year. (A) Most of the farmers are generally dependent on rains. (B) There is no water in tthe ponds (C) The monsoon Winds are late this year. (D) Wheat and paddy require water for cultivation.
17.
Choose a pair that has most similar relationship to the given pair Interested: Zealous (A) Wild: Bizarre (B) Decent: Contemporary (C) Hateful: Nauseous (D) Hungry: Ravenous
18.
In a survey of unemployed, three-fifths three fifths admitted to being at least somewhat dishonest. However, the survey may underestimate the proportion of respondents who are dishonest, because________. (A) Some dishonest respondents taking the survey might have claimed to be honest on the survey (B) Some generally honest respondents taking the survey might have claimed on the survey to be dishonest (C) Some respondents who claimed on the survey to be at least a little dishonest dishonest may be very dishonest (D) Some respondents who claimed on the survey to be dishonest may have been answering honestly SPACE FOR ROUGH WORK
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IV V Year – Instrumentation Engineering 19.
Identify the choice that replaces the underlined part to form a logically and grammatically correct statement. The greatest obstacle to economic and environmental improvements in developing countries is its mammoth foreign debt. (A) developing countries is its (B) the developing countries is its (C) developing countries is their (D) the developing countries is th their
20.
Data of different states regarding population of states in the year 1998: Total population of given states = 32, 76,000 U.P 15%
T.N 9%
Bihar 11%
A.P
Goa
25%
12% Delhi 8%
M.P 20%
Following table shows that sex & literacy wise population ratio: States Andhra Pradesh Madhya Pradesh Delhi Goa Bihar Uttar Pradesh Tamil Nadu
Sex Literacy Male Female Literate Illiterate 5 3 2 7 3 1 1 4 2 3 2 1 3 5 3 2 3 4 4 1 3 2 7 2 3 4 9 4
What will be the total percentage of total number of males in U.P, M.P & Goa together to the total population of all given states ? (A) 28.5% (B) 18.5% (C) 23% (D) 32% SPACE FOR ROUGH WORK
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IV V Year – Instrumentation Engineering Section-II: Technical 21.
The voltage across the last resistor is V. All the resistors are unity. Then VS is 1Ω (A) 13V 1Ω 1Ω (B) 19V VS
(C) 25V
+ −
1Ω
1Ω
1Ω
+ V −
(D) 8V 22.
Let p be the probability that a managed y will get into an accident in a year. What is the probability that a man among ‘n’ men of all aged ‘y’ will get into accident first?
1 n (A) 1 − (1 − p ) n 23.
1 n (B) 1 − (1 + p ) n
(C)
(1 − p )
n
n
n (D) n 1 − (1 − p )
Analog switch of sample and hold circuit as shown in figure has ON resistance of 100Ω. Output amplifier has input bias current of 1µA. Then the discharging rate of capacitor ‘C’ when switch is
open is (A) 0.01V / sec
Input Buffer
output amplifier S
(B) 0.1V / sec C = 100 µF
(C) 0.1mV / sec
switch
(D) None 24.
A 15W laser power of wavelength 1700 nm is passed through an optical cable having attenuation of 0.1 dB / km . The power at a distance of 5 km from source will be
(A) 14.26 W 25.
(B) 13.36 W
(C) 16.8 W
(D) 4.7 W
In a class – B push pull operation, the D.C. power drawn is 28W. The power delivered by the amplifier to the load at its maximum power conversion efficiency is (A) 40W (B) 19W (C) 32W (D) 22W
SPACE FOR ROUGH WORK
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IV V Year – Instrumentation Engineering 26.
In the following Op-Amp, Amp, when w only V1 of 1 V is applied and V2 is grounded then output is -8 V and when only V2 of 2 V is applied and V1 is kept at 0 V, output is 20 V then CMRR of op op-amp is approximately
(A) 13 dB 27.
(B) 20 dB
(C) 43 dB
Given a function f(t) as shown below.
V1
−
V2
+
V0
(D) 68 dB
f(t)
1
+1
0
−1
E
The above signal is fed as in input put to (all inputs, outputs and system function given in frequency domain) ω2 4
F ( jω)
The magnitude of output at ω =
(A) 1
2
( )
output
π rad/sec is 2
(B) 0
(C) 0.08
(D) 0.64
dy = 3 (1 + x ) − y and y = 4 when x = 1. Using Runga-Kutta Kutta fourth order method, the dx approximate value of y when x = 1.2 will be (A) 0.419 (B) 0.519 (C) 0.613 (D) 0.318
28.
Given:
29.
Solution for 4π (A) abc
∫ (a x 2
S
2
+ b 2 y 2 + c2 z 2 ) 4π (B) 3 abc
−1
2
dS where S is surface of ellipsoid ax 2 + by2 + cz 2 = 1 is 4π (C) abc (D) None of these 3
SPACE FOR ROUGH WORK
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IV V Year – Instrumentation Engineering 30.
For calibrating a test lamp of 250 cd using standard tungsten lamp of intensity 1000 cd, an arrangement is set up as shown in figure. The relation between r1 and r2 is (A) r1=2r2 photometer head
(B) r2=2r1 Tungsten lamp
Test lamp
(C) r1= r2 (D) None r2
r1
31.
Consider the system shown in the figure X f
5
4 3
−3 −1 0 1
H (f )
5 3
+
1 3
f
−2 −1 0 1
The D.C component in signal y(t) is (A) 0.9341 (B) 0
32.
1Ω
2
2
f
g (t )
(C) 12
1F
−
y (t )
(D) 8
A source has 256 symbols which are equiprobable and their successive transmissions are independent. If an AWGN channel with a bandwidth of 4 kHz and SNR of 31 is used for transmission of symbols, then the maximum rate (in symbols / sec) at which the transmission transm can be made with an arbitrary low probability error is (A) 1500 (B) 2000 (C) 2500 (D) 3000
SPACE FOR ROUGH WORK
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IV V Year – Instrumentation Engineering 33.
The Transfer function
Y (s)
+
of the LTI system shown below is (A)
(B)
(C)
34.
G1 ( s)
X (s)
G1 ( s ) G 2 ( s ) + 1
+
X ( s) +
1 − G1 ( s ) G 2 ( s ) G 2 ( s ) 1 + G1 ( s )
G2 ( s)
+
Y ( s)
1 − G 2 ( s ) G1 ( s ) G1 ( s ) 1 + G1 ( s )
(D)
1 − G1 ( s ) + G 2 ( s )
G 2 ( s ) (1 + G1 ( s ) ) 1 + G1 ( s ) + G 2 ( s )
An Integral controller is used in a first order system to improve its response with unity gain feedback as shown in figure. The time integral constant to provide a damping ratio of 0.5 is _________. R (s ) 1 1 C (s ) (A) 0.01 (B) 1.1 s + 10 Ts i
Controller
(C) 11.1 35.
System
(D) 111.1
A 3 A 2 A1A 0 4
B3 B2 B1 , B0
Quad ruple Two-to-one Line MUX
Select
4 ×1 MUX
S1
B2
S0
In the above digital circuit, to get an output bit as ‘B2’ what are the values of select and S1S0? (A) Select = 0;S1S0 = 10 (B) Select = 1;S1S0 = 10 (C) Select = 1; S1S0 = 01
(D) Select = 0; S1S0 = 01 SPACE FOR ROUGH WORK
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IV V Year – Instrumentation Engineering 36.
Consider the differential equation equation, Find the P.I. of the above equation. cos nx xsin nx logsec log sec nx + (A) n2 n cos nx xsin nx log sec nx logsec (C) 2 n n
d2 y + n 2 y = sec nx [ n ≠ 0] dx 2
cos nx xsin nx log cos nx + n2 n cos nx xsin nx log cos nx (D) 2 n n (B)
37.
A PCM system uses a uniform quantizer which has a range –V V to +V and it is followed by a 77-bit binary encoder. A zero mean signal applied to the quantizer extends over its entire range and has uniform probability density. The ratio of the signal power to tthe he quantisation noise power at the output of the quantizer is (A) 42 dB (B) 38 dB (C) 28 dB (D) 18 dB
38.
For the figure shown below, r ( t ) = sin ωt. and the steady state response C(t) will exhibit a response peak at a frequency of _________. _________ (A) 3.5 rad/sec r (t ) + 16 c (t) (B) 2.8 rad/sec s ( s + 4) (C) 4.3 rad/sec (D) 6.8 rad/sec RTD
39.
Temperature of an electric oven is measured with the help of an RTD as shown in the figure. The resistance of the RTD at 0°C is 10kΩ and the temperature coefficient of resistance is 0.0021oC-1. If the temperature reaches to 80°C ,
10KΩ
− +
V0
−10V
the output voltage Vo generated by the circuit, is (A) 11.68 V (C) 30.5 V
(B) 2.8 V (D) 6.8 V SPACE FOR ROUGH WORK
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IV V Year – Instrumentation Engineering 40.
For common base operation of a BJT, which of the following are correct? I. High voltage gain II. Excellent high frequency response III. High input resistance IV. Ideal current buffer (A) I and II (B) I and III (C) I, II and III (D) I, II and IV
41.
The velocity of a bubbled stream is determined by an ultrasonic Doppler-flow Doppler flow meter. The transmitted frequency by the transmitter is 2 kHz. The velocity of the ultrasonic wave in the stream is 310 m/sec and it makes an angle of 30° with th the axis of the flow pipe. If the frequency of the ultrasonic beam shifts by 5 Hz after striking the bubble, then the velocity of the stream is (A) 0.35m/sec (B) 0.25m/sec (C) 0.45m/sec (D) 0.65m/sec 1 2− y
42.
∫0 ∫y xydxdy =__________. (A) 0.392
43.
(B) 0.292
(C) 0.492
(D) 0.153
A CRO is used to record the impulse wave during a test in a laboratory as shown in figure.
Im pulse Generator
zo
Test object
CRO
τ = 1µ sec zo
The parameters of the impulse wave are rise time =1.2 µ sec and fall time= 50µ sec. To record the waveform without any missing data, the bandwidth of the CRO should should be greater than ________. ________ (A) 0.292MHz (B) 0.526MHz (C) 0.893MHz (D) 0.99MHz
SPACE FOR ROUGH WORK
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IV V Year – Instrumentation Engineering 44.
The power dissipated in the 5 Ω resistor for the circuit shown below is 5V (A) 2.4W 10V +
−
+
−
(B) 1.9W 2A
(C) 3.2W
10Ω
5Ω
1Ω
(D) 8W 45.
The frequency of the pulse at x4 in the network shown below is
x0
(320 kHz )
10-bit Ring counter
(A) 10Hz 46.
x1
4-bit parallel counter
(B) 15Hz
x2
Mod 25 Ripple counter
x3
4-bit Johnson counter
(C) 20Hz
To measure strain in a cantilever beam, a single strain gauge of resistance 2kΩ and gauge factor 2.5 and
2-bit Ring counter
x4
x5
(D) 25Hz S.G,R 3
R 1 = 2kΩ
temperature coefficient 9 × 10−6 / °C is mounted on the R 2 = 200Ω beam and connected in the bridge as shown in the figure below. The bridge detector resistance is 100Ω R 4 = 200Ω and its sensitivity is 10mm/µA. 10V The detector deflection for 0.2 percent strain is (A) 103.6mm (B) 153.26mm (C) 203.25mm (D) 250.53mm
47.
Consider the Hay’s bridge shown in the figure where R 1 = 1kΩ R 2 = 8k R 3 = 800 Ω . Quality factor of the coil is 5. The bridge is under balanced condition. ω=1000rad/sec The value of resistance R4 is (A) 246Ω (B) 6.4kΩ
(C) 6.14 kΩ
L1 R3
R1
D R2
R4
c4
(D) 10 kΩ
SPACE FOR ROUGH WORK
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IV V Year – Instrumentation Engineering 48.
Two bellows are used to measure air pressure. When inlet ‘B’ is open to vacuum chamber, the pressure transducer ‘PT’ indicates 4 atm. The gauge pressure at outlet if inlet ‘B’ is opened to air chamber of 1 atm pressure is Inlet 'A ' Gas Outlet • •
Inlet 'B'
(A) 3atm 49.
50.
(B) 6atm
PT
(C) 8atm
A capacitive type displacement transducer has dimension of plates as 10 mm×10 mm and sensitivity as 5pF/mm. If plates B3 and A4 are removed, then the sensitivity of transducer changes to (A) 3.33pF/mm (B) 5.33pF/mm (C) 6.33pF/mm (D) 8.33pF/mm
Pressure transducer
(D) 10atm A1 B1 A2 B2
A3 B3 A4
Fixed Frame
x
Movable Frame
For the network shown below, switch was open for very long time and is thrown at t = 0. The value VL at t = 1 sec is given by 10 Ω (A) 0.47 V 20Ω +
8V
(B) 1 V
10H
(C) 1.47 V (D) Can’t be determined
10V
VL −
SPACE FOR ROUGH WORK
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12 of 12
For or all positive numbers x and y which of following functions is f(x f(x-y) y) = f(x) - f(y) 2 (A) f(A) = a (B) f(A)= a+1 (C) f ( A ) = a (D) f(A)= -3a
2.
Find the wrong number in the series 2, 6, 29, 146, 877, 6140 (A) 6140 (B) 2 (C) 29
(D) 6
3.
In the sentence given below, pick up one option, which is most nearly same in meaning as the word printed in bold, and can replace it without altering meaning meaning of sentence. Being a member of this club, he has certain rights. (A) status (B) truth (C) virtues (D) privileges
4.
In the following question, choose the word which is the exact OPPOSITE of the given word. NIGGARDLY (A) Frugal (B) Thrifty (C) Stingy (D) Generous
5.
Pick out the most effective word from the given words to fill in the blank to make the sentence meaningfully complete. If negotiations are to prove fruitful, there must not only be sincerity on each side, but there must also be ........... in the sincerity of the other side. (A) Faith (B) Belief (C) Substance (D) Certainty
6.
B and C working together can do a job in 24 days. After working together for 15 days, B left. C took 15 more days to do the remaining job. If B works alone, in how many days can he finish the job? (A) 30 (B) 40 (C) 48 (D) 60
7.
A dishonest dealer marks up the price of his goods by 20% and gives a discount of 10% to the customer. Besides, he also cheats both his supplier and his buyer by 100 grams while wh buying and selling 1 kilogram. Find the percentage profit earned by the shopkeeper. (A) 30 (B) 35 (C) 32 (D) 29
8.
In a group of 6 boys and 4 girls, 4 children are to be selected. In how many different ways they can be selected such that atleast 2 boys b are there? (A) 100 (B) 205 (C) 185 (D) 211 SPACE FOR ROUGH WORK
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IV V Year – Instrumentation Engineering 9.
80 percent of the employees in a company are male. 10 percent of the employees in the company are currently in Tamilnadu. Of the employees in Tamilnadu, 40 percent are in Chennai, 40 percent are in Coimbatore, and 20 percent are in Trichy. Of the employees at Chennai, 75 percent are male. What percent of the company's female employees are currently in Chennai? (A) 18 percent (B) 15 percent (C) 21 percent (D) 6 percent
10.
Average traffic at Paradise Paradis X roads during Monday-Thursday Thursday is 21 vehicles per minute. The respective value during Thursday Thursday-Sunday Sunday is 28 vehicles per min. Which of the following values are possible for average traffic for all days (in vehicles per minute)? (i) 16 (ii) 20 (iii) 28 (A) Only ii (B) ii and iii (C) i and iii (D) i, ii, and iii
11.
You win some and loose some. You must enjoy winning. But do not let it go to the head. The moment it does, you are already on your way to failure. If you encounter a failure, don’t beat bea yourself for it or anyone else for that matter. Accept it, look at your own share in the problem, learn from it and move on. Choose the summary: (A) Where there is a will there is a way (B) Failure is the stepping stone of success (C) Winners don’t do different things, but do things differently. (D) When you lose, don’t n’t lose the lesson
12.
Janak is participating in a 180 km bike race. Janak rides at an average speed of 30 km per hour for the first one-third third distance, 20 km per hour for f the next one-third third distance, and 10 km per hour for the final 60 km. What was Janak’s average speed for the race? (A) 15 km/h (B) 16.67 km/h (C) 22.5 km/h (D) 16.36 km/h
13.
In question below, there is a sentence of which some parts has been jumbled up up. Rearrange these parts, which are labeled P, Q, R, and S to produce the correct sentence. Choose the proper sequence. It would (P) appear from his statement (Q) about the policy of management (R) in dealing with the strike (S) that he was quite in the dark d The proper sequence should be: (A) RPSQ (B) PSQR (C) RQPS (D) PRQS SPACE FOR ROUGH WORK
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IV V Year – Instrumentation Engineering 14.
There are 65 questions in a 3 hr examination. Among these questions there are 15 general aptitude problems. It is suggested that two two-thirds thirds as much time be spent on each general aptitude problem as for each other question. How many minutes should be spent on general aptitude problems? (A) 30 (B) 45 (C) 50 (D) 60
15.
According to the Sci-True True Lab, the new micro micro-organism organism is discovered in certain lakes was identified once as spherical, once as cubical, and once as spiral, but has never been seen to assume the same shape twice. Which of the following is implied in the above statement? (A) The new micro-organism organism can be expected eventually to assume every possible shape. (B) The new micro-organism organism is different from all organisms previously known. (C) The Sci-True True Lab is not a reliable source of information about the new micro-organism. micro (D) The new micro-organism organism can be identified on the basis of some characteristic other than shape.
16.
Choose the best inference from the given statement Statement:: If it does not rain throughout this month, most farmers will be in trouble this year. (A) Most of the farmers are generally dependent on rains. (B) There is no water in tthe ponds (C) The monsoon Winds are late this year. (D) Wheat and paddy require water for cultivation.
17.
Choose a pair that has most similar relationship to the given pair Interested: Zealous (A) Wild: Bizarre (B) Decent: Contemporary (C) Hateful: Nauseous (D) Hungry: Ravenous
18.
In a survey of unemployed, three-fifths three fifths admitted to being at least somewhat dishonest. However, the survey may underestimate the proportion of respondents who are dishonest, because________. (A) Some dishonest respondents taking the survey might have claimed to be honest on the survey (B) Some generally honest respondents taking the survey might have claimed on the survey to be dishonest (C) Some respondents who claimed on the survey to be at least a little dishonest dishonest may be very dishonest (D) Some respondents who claimed on the survey to be dishonest may have been answering honestly SPACE FOR ROUGH WORK
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IV V Year – Instrumentation Engineering 19.
Identify the choice that replaces the underlined part to form a logically and grammatically correct statement. The greatest obstacle to economic and environmental improvements in developing countries is its mammoth foreign debt. (A) developing countries is its (B) the developing countries is its (C) developing countries is their (D) the developing countries is th their
20.
Data of different states regarding population of states in the year 1998: Total population of given states = 32, 76,000 U.P 15%
T.N 9%
Bihar 11%
A.P
Goa
25%
12% Delhi 8%
M.P 20%
Following table shows that sex & literacy wise population ratio: States Andhra Pradesh Madhya Pradesh Delhi Goa Bihar Uttar Pradesh Tamil Nadu
Sex Literacy Male Female Literate Illiterate 5 3 2 7 3 1 1 4 2 3 2 1 3 5 3 2 3 4 4 1 3 2 7 2 3 4 9 4
What will be the total percentage of total number of males in U.P, M.P & Goa together to the total population of all given states ? (A) 28.5% (B) 18.5% (C) 23% (D) 32% SPACE FOR ROUGH WORK
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IV V Year – Instrumentation Engineering Section-II: Technical 21.
The voltage across the last resistor is V. All the resistors are unity. Then VS is 1Ω (A) 13V 1Ω 1Ω (B) 19V VS
(C) 25V
+ −
1Ω
1Ω
1Ω
+ V −
(D) 8V 22.
Let p be the probability that a managed y will get into an accident in a year. What is the probability that a man among ‘n’ men of all aged ‘y’ will get into accident first?
1 n (A) 1 − (1 − p ) n 23.
1 n (B) 1 − (1 + p ) n
(C)
(1 − p )
n
n
n (D) n 1 − (1 − p )
Analog switch of sample and hold circuit as shown in figure has ON resistance of 100Ω. Output amplifier has input bias current of 1µA. Then the discharging rate of capacitor ‘C’ when switch is
open is (A) 0.01V / sec
Input Buffer
output amplifier S
(B) 0.1V / sec C = 100 µF
(C) 0.1mV / sec
switch
(D) None 24.
A 15W laser power of wavelength 1700 nm is passed through an optical cable having attenuation of 0.1 dB / km . The power at a distance of 5 km from source will be
(A) 14.26 W 25.
(B) 13.36 W
(C) 16.8 W
(D) 4.7 W
In a class – B push pull operation, the D.C. power drawn is 28W. The power delivered by the amplifier to the load at its maximum power conversion efficiency is (A) 40W (B) 19W (C) 32W (D) 22W
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IV V Year – Instrumentation Engineering 26.
In the following Op-Amp, Amp, when w only V1 of 1 V is applied and V2 is grounded then output is -8 V and when only V2 of 2 V is applied and V1 is kept at 0 V, output is 20 V then CMRR of op op-amp is approximately
(A) 13 dB 27.
(B) 20 dB
(C) 43 dB
Given a function f(t) as shown below.
V1
−
V2
+
V0
(D) 68 dB
f(t)
1
+1
0
−1
E
The above signal is fed as in input put to (all inputs, outputs and system function given in frequency domain) ω2 4
F ( jω)
The magnitude of output at ω =
(A) 1
2
( )
output
π rad/sec is 2
(B) 0
(C) 0.08
(D) 0.64
dy = 3 (1 + x ) − y and y = 4 when x = 1. Using Runga-Kutta Kutta fourth order method, the dx approximate value of y when x = 1.2 will be (A) 0.419 (B) 0.519 (C) 0.613 (D) 0.318
28.
Given:
29.
Solution for 4π (A) abc
∫ (a x 2
S
2
+ b 2 y 2 + c2 z 2 ) 4π (B) 3 abc
−1
2
dS where S is surface of ellipsoid ax 2 + by2 + cz 2 = 1 is 4π (C) abc (D) None of these 3
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IV V Year – Instrumentation Engineering 30.
For calibrating a test lamp of 250 cd using standard tungsten lamp of intensity 1000 cd, an arrangement is set up as shown in figure. The relation between r1 and r2 is (A) r1=2r2 photometer head
(B) r2=2r1 Tungsten lamp
Test lamp
(C) r1= r2 (D) None r2
r1
31.
Consider the system shown in the figure X f
5
4 3
−3 −1 0 1
H (f )
5 3
+
1 3
f
−2 −1 0 1
The D.C component in signal y(t) is (A) 0.9341 (B) 0
32.
1Ω
2
2
f
g (t )
(C) 12
1F
−
y (t )
(D) 8
A source has 256 symbols which are equiprobable and their successive transmissions are independent. If an AWGN channel with a bandwidth of 4 kHz and SNR of 31 is used for transmission of symbols, then the maximum rate (in symbols / sec) at which the transmission transm can be made with an arbitrary low probability error is (A) 1500 (B) 2000 (C) 2500 (D) 3000
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IV V Year – Instrumentation Engineering 33.
The Transfer function
Y (s)
+
of the LTI system shown below is (A)
(B)
(C)
34.
G1 ( s)
X (s)
G1 ( s ) G 2 ( s ) + 1
+
X ( s) +
1 − G1 ( s ) G 2 ( s ) G 2 ( s ) 1 + G1 ( s )
G2 ( s)
+
Y ( s)
1 − G 2 ( s ) G1 ( s ) G1 ( s ) 1 + G1 ( s )
(D)
1 − G1 ( s ) + G 2 ( s )
G 2 ( s ) (1 + G1 ( s ) ) 1 + G1 ( s ) + G 2 ( s )
An Integral controller is used in a first order system to improve its response with unity gain feedback as shown in figure. The time integral constant to provide a damping ratio of 0.5 is _________. R (s ) 1 1 C (s ) (A) 0.01 (B) 1.1 s + 10 Ts i
Controller
(C) 11.1 35.
System
(D) 111.1
A 3 A 2 A1A 0 4
B3 B2 B1 , B0
Quad ruple Two-to-one Line MUX
Select
4 ×1 MUX
S1
B2
S0
In the above digital circuit, to get an output bit as ‘B2’ what are the values of select and S1S0? (A) Select = 0;S1S0 = 10 (B) Select = 1;S1S0 = 10 (C) Select = 1; S1S0 = 01
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IV V Year – Instrumentation Engineering 36.
Consider the differential equation equation, Find the P.I. of the above equation. cos nx xsin nx logsec log sec nx + (A) n2 n cos nx xsin nx log sec nx logsec (C) 2 n n
d2 y + n 2 y = sec nx [ n ≠ 0] dx 2
cos nx xsin nx log cos nx + n2 n cos nx xsin nx log cos nx (D) 2 n n (B)
37.
A PCM system uses a uniform quantizer which has a range –V V to +V and it is followed by a 77-bit binary encoder. A zero mean signal applied to the quantizer extends over its entire range and has uniform probability density. The ratio of the signal power to tthe he quantisation noise power at the output of the quantizer is (A) 42 dB (B) 38 dB (C) 28 dB (D) 18 dB
38.
For the figure shown below, r ( t ) = sin ωt. and the steady state response C(t) will exhibit a response peak at a frequency of _________. _________ (A) 3.5 rad/sec r (t ) + 16 c (t) (B) 2.8 rad/sec s ( s + 4) (C) 4.3 rad/sec (D) 6.8 rad/sec RTD
39.
Temperature of an electric oven is measured with the help of an RTD as shown in the figure. The resistance of the RTD at 0°C is 10kΩ and the temperature coefficient of resistance is 0.0021oC-1. If the temperature reaches to 80°C ,
10KΩ
− +
V0
−10V
the output voltage Vo generated by the circuit, is (A) 11.68 V (C) 30.5 V
(B) 2.8 V (D) 6.8 V SPACE FOR ROUGH WORK
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IV V Year – Instrumentation Engineering 40.
For common base operation of a BJT, which of the following are correct? I. High voltage gain II. Excellent high frequency response III. High input resistance IV. Ideal current buffer (A) I and II (B) I and III (C) I, II and III (D) I, II and IV
41.
The velocity of a bubbled stream is determined by an ultrasonic Doppler-flow Doppler flow meter. The transmitted frequency by the transmitter is 2 kHz. The velocity of the ultrasonic wave in the stream is 310 m/sec and it makes an angle of 30° with th the axis of the flow pipe. If the frequency of the ultrasonic beam shifts by 5 Hz after striking the bubble, then the velocity of the stream is (A) 0.35m/sec (B) 0.25m/sec (C) 0.45m/sec (D) 0.65m/sec 1 2− y
42.
∫0 ∫y xydxdy =__________. (A) 0.392
43.
(B) 0.292
(C) 0.492
(D) 0.153
A CRO is used to record the impulse wave during a test in a laboratory as shown in figure.
Im pulse Generator
zo
Test object
CRO
τ = 1µ sec zo
The parameters of the impulse wave are rise time =1.2 µ sec and fall time= 50µ sec. To record the waveform without any missing data, the bandwidth of the CRO should should be greater than ________. ________ (A) 0.292MHz (B) 0.526MHz (C) 0.893MHz (D) 0.99MHz
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IV V Year – Instrumentation Engineering 44.
The power dissipated in the 5 Ω resistor for the circuit shown below is 5V (A) 2.4W 10V +
−
+
−
(B) 1.9W 2A
(C) 3.2W
10Ω
5Ω
1Ω
(D) 8W 45.
The frequency of the pulse at x4 in the network shown below is
x0
(320 kHz )
10-bit Ring counter
(A) 10Hz 46.
x1
4-bit parallel counter
(B) 15Hz
x2
Mod 25 Ripple counter
x3
4-bit Johnson counter
(C) 20Hz
To measure strain in a cantilever beam, a single strain gauge of resistance 2kΩ and gauge factor 2.5 and
2-bit Ring counter
x4
x5
(D) 25Hz S.G,R 3
R 1 = 2kΩ
temperature coefficient 9 × 10−6 / °C is mounted on the R 2 = 200Ω beam and connected in the bridge as shown in the figure below. The bridge detector resistance is 100Ω R 4 = 200Ω and its sensitivity is 10mm/µA. 10V The detector deflection for 0.2 percent strain is (A) 103.6mm (B) 153.26mm (C) 203.25mm (D) 250.53mm
47.
Consider the Hay’s bridge shown in the figure where R 1 = 1kΩ R 2 = 8k R 3 = 800 Ω . Quality factor of the coil is 5. The bridge is under balanced condition. ω=1000rad/sec The value of resistance R4 is (A) 246Ω (B) 6.4kΩ
(C) 6.14 kΩ
L1 R3
R1
D R2
R4
c4
(D) 10 kΩ
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IV V Year – Instrumentation Engineering 48.
Two bellows are used to measure air pressure. When inlet ‘B’ is open to vacuum chamber, the pressure transducer ‘PT’ indicates 4 atm. The gauge pressure at outlet if inlet ‘B’ is opened to air chamber of 1 atm pressure is Inlet 'A ' Gas Outlet • •
Inlet 'B'
(A) 3atm 49.
50.
(B) 6atm
PT
(C) 8atm
A capacitive type displacement transducer has dimension of plates as 10 mm×10 mm and sensitivity as 5pF/mm. If plates B3 and A4 are removed, then the sensitivity of transducer changes to (A) 3.33pF/mm (B) 5.33pF/mm (C) 6.33pF/mm (D) 8.33pF/mm
Pressure transducer
(D) 10atm A1 B1 A2 B2
A3 B3 A4
Fixed Frame
x
Movable Frame
For the network shown below, switch was open for very long time and is thrown at t = 0. The value VL at t = 1 sec is given by 10 Ω (A) 0.47 V 20Ω +
8V
(B) 1 V
10H
(C) 1.47 V (D) Can’t be determined
10V
VL −
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