OnestopGate   OnestopGate
   Wednesday, September 3, 2014 Login  
Home | Overview | Syllabus | Tutorials | FAQs | Downloads | Recommended Websites | Advertise | Payments | Contact Us | Forum

GATE Resources
Gate Articles
Gate Books
Gate Colleges 
Gate Downloads 
Gate Faqs
Gate Jobs
Gate News 
Gate Sample Papers
Training Institutes

GATE Overview
GATE Eligibility
Structure Of GATE
GATE Coaching Centers
Colleges Providing M.Tech/M.E.
GATE Score
GATE Results
PG with Scholarships
Article On GATE
Admission Process For M.Tech/ MCP-PhD
GATE Topper 2012-13
GATE Forum

GATE 2015 Exclusive
Organizing Institute
Important Dates
How to Apply
Discipline Codes
GATE 2015 Exam Structure

GATE 2015 Syllabus
Aerospace Engg..
Agricultural Engg..
Architecture and Planning
Chemical Engg..
Civil Engg..
Computer Science / IT
Electronics & Communication Engg..
Electrical Engg..
Engineering Sciences
Geology and Geophysics
Instrumentation Engineering
Life Sciences
Mechanical Engg..
Metallurgical Engg..
Mining Engg..
Production & Industrial Engg..
Pharmaceutical Sciences
Textile Engineering and Fibre Science

GATE Study Material
Aerospace Engg..
Agricultural Engg..
Chemical Engg..
Civil Engg..
Computer Science / IT
Electronics & Communication Engg..
Electrical Engg..
Engineering Sciences
Instrumentation Engg..
Life Sciences
Mechanical Engg..
Pharmaceutical Sciences
Textile Engineering  and Fibre Science

GATE Preparation
GATE Pattern
GATE Tips N Tricks
Compare Evaluation
Sample Papers 
Gate Downloads 
Experts View

CEED 2013
CEED Exams
Application Forms
Important Dates
Contact Address
Examination Centres
CEED Sample Papers

Discuss GATE
GATE Forum
Exam Cities
Contact Details
Bank Details

Contact Us

Home » GATE Prepration » Sample Papers » Instrumentation Engineering Sample Papers

Instrumentation Engineering Sample Papers

Looking for GATE Preparation Material? Join & Get here now!

** Gate 2013 Question Papers.. ** CEED 2013 Results.. ** Gate 2013 Question Papers With Solutions.. ** GATE 2013 CUT-OFFs.. ** GATE 2013 Results.. **

Instrumentation Engineering Sample Questions

Instrumentation Engineering Sample Questions

Questions And Answers

GATE Examination Question Papers - Instrumentation - 1999
GATE 1999

1. This question contains 30 sub-questions of multiple-choice type. Each sub-question has only one correct answer.


1.1. GATE IN 2

(a) 0 (b) 1.1

(c) 0.5 (d) 1


1.2. For the waveform V (t) = 2 + cos GATE IN 4 the ratio V rms / V average is

(a) GATE IN 6 (b) GATE IN 8

(c) p (d) GATE IN 10

1.3. A system with transfer function GATE IN 12, subjected to a step input takes 10 seconds to reach 50% of the step height. The value of t is

(a) 6.9 s (b) 10 s

(c) 14.4 s (d) 20 s


  • Relationship between input x (t) and output y (t) of a system is given as


The transfer function of this system is

(a) GATE IN 16

(b) GATE IN 18

(c) 1+ s 2e -2s


(d) 1+ s 2e 2s

1.5. A transfer function has two zeroes at infinity. Then the relation between the numerator degree (N) and the denominator degree (M) of the transfer function is,

(a) N=M+2

(b) N=M-2

(c) N=M+1

(d) N=M-l


  • The system GATE IN 20 is subjected to a step input. The system output y (t) as t is

(a) 0.8 (c) -0.4

(b) 0.4 (d) unbounded


1.7. The transfer function betweenY 2 and Y 1 in Fig. 1.7 is


(a) a+b

(b) (a+b)c

(C) GATE IN 24

(d) GATE IN 26


1.8. In control system design, gain and phase margins are usually provided to

(a) account for the uncertainties in the system

(b) make the system respond fast

(c) reduce the overshoot in step response

(d) reduce the steady state offset.

1.9. The lengths of two discrete time sequences X 1 (n) are 5 and 7 respectively. The maximum length of sequence x 1 (n) * x 2(n) is

(a) 5 (b) 6

(c) 7 (d) 11


1.10. The output voltage of the circuit in Fig. 1.10 for t > 0 is

GATE IN 28 (a) GATE IN 30

(b) GATE IN 32

(c) GATE IN 34

(d) GATE IN 36


  • In the circuit shown in Fig. 1.11, V i is 4 V. Assuming the diodes to be ideal, V o is
  • GATE IN 38 3V
  • 4V
  • 4.5 V
  • 6 V


1.12. The input voltage, V 1 is 4 + 3 sin wt. assuming all elements to be ideal, the average of the output voltage V o in Fig. 1.12 is

(a) -3 V (b) +3 V

(c) -7 V (d) +7 V



1.13. In the JFET amplifier circuit shown in Fig. 1.13, the signal outputs V 1 and v 2 are related as GATE IN 42

(a) GATE IN 44

(b) GATE IN 46

(c) GATE IN 48

(d) GATE IN 50

1.14. The op-amp in the amplifier circuit shown in Fig. 1.14 has an offset voltage of 10 mV and it is ideal otherwise. If V i is zero, the output voltage V o is

  • GATE IN 52 0
  • 10 mV
  • 100 mV
  • 110 mV


GATE IN 54 1.15. A voltmeter connected across the 10 k W resistor in the Fig. 1.15, reads 5 V. The voltmeter is rated at 1000 ohms/volt and has a full scale reading of 10 V. The supply voltage V s in volt is

  • 30
  • 50
  • 55
  • 80

1.16. An oscilloscope input impedance consists of I M W in parallel with 100pF. A compensated 20: 1 attenuator is obtained by connecting a parallel combination of

(a) 19 M W and GATE IN 56 pF (b) 20 M W and GATE IN 58 pF

(c) 19 M W and 1900 pF (d) 20 M W and 2000 pF.


1.17. The bridge circuit in Fig. GATE IN 60 1.17 is balanced. The magnitude of current I is

  • 2mA
  • 4mA
  • 5mA
  • 6mA

1.18. A phase locked loop can be employed for demodulation of

(a) pulse amplitude modulated signals

(b) pulse code modulated signals

(c) frequency modulated signals

(d) single side band amplitude modulated signals.


1.19. A number in 4-bit two's complement representation is X 3 X 2 X 1 X o . This number when stored using 8-bi1s will be

(a) 0000 X 3 X 2 X 1 X o

(b) 1111 X 3 X 2 X 1 X o

(c) X 3 X 3 X 3 X 3 X 3 X 2 X 1 X o

(d) GATE IN 62GATE IN 62GATE IN 62_01GATE IN 62_02 X 3 X 2 X 1 X o

1.20. A computer has a memory space of 2 16 and word length of 24 bits. The memory chips available have 10 address and 8 data lines. The number of chips required for the computer memory space is

(a) 192 (b) 256

(c) 512 (d) 1024


1.21. For a shaft encoder, the most appropriate 2-bit code is

(a) 11,10,01,00 (b) 11,10,00,01

(c) 01, 10, 11,00 (d) 01,00, 11, 10


1.22. The term 'precision' used in instrumentation means

(a) gradual departure of the measured value from the calibrated value

(b) smallest increment in the measure and that can be detected by the instrument

(c) maximum distance or angle through which any part of a mechanical system may be moved in one direction without causing motion of the next part

(d) the ability of the instrument to give output readings close to each other, when the input is constant.


1.23. A resistance potentiometer has a total resistance of 10000 W and is rated 4 W. If the range of potentiometer is 0 to 100 mm, then its sensitivity in V/mm is

(a) 1.0 (b) 2.0

(c) 2.5 (d) 25

1.24. The temperature of fixed points used to define International Temperature Scale are determined by using

(a) Platinum resistance thermometer

(b) Platinum, Platinum-Rhodium thermo-couples

(c) vapour-pressure thermometer

(d) gas thermometer to which corrections are applied for non-ideal behaviour of the gas.


  • The emf-temperature data for a thermocouple with reference junction at OC is as follows,

Temperature ( 0C) 20 180 200

emf(mV) 1.2 11.8 13.5

The emf developed in mV with the two junctions at 200C is

(a) 11.8 (b) 12.3

(c) 13.0 (d) 13.5

1.26. A rotameter with a heavy float for measuring gas flow is calibrated with a gas of density 1.2 kg/m 3. It measures the flow rate of a different gas having density of 2 kg/m 3 and indicates a flow rate of 2.2 m 3/min. The actual flow rate in m 3/min is

(a) 0.79 (b) 1.32

(c) 1.70 (d) 2.20


1.27. The sound pressure level (SPL) measured in open space (free field), at a distance of 6 m from a noise source is 80 dB. At a distance of 60 m, the SPL is

(a) 80 dB (b) 60 dB

(c) 8 dB (d) 1.34 dB


1.28. An optical fibre has a refractive index of 1.641 for the core and 1.422 for the cladding. The critical angle above which a ray will be totally internally reflected is

(a) 37 o (b) 41

(c) 45 (d) 60

1.29. A frequency stablised HeNe laser with a wavelength of 6328 A 0 has a bandwidth of 1 MHz. Its coherence length is

  • 0.3 m
  • 3 m
  • 30 m
  • 300 m


1.30. Attenuation of a narrow monochromatic X-ray beam in a metal plate of thickness 'd' is given by the equation

(a) I=I o exp(- m d)

(b) I= I 0 exp (- m d 2)

(c) I = I 0 exp (- m /d)

(d) I= I 0 exp (- m /d 2)


2. This question contains 15 sub-questions of multiple-choice type. Each sub-question has only one correct answer.


2.1. The transfer function of a passive circuit has its poles and zeroes on

(a) left and right halves respectively of the s-plane

(b) right and left halves respectively of the s-plane

(c) right half of the s-plane

(d) left half of the s-plane.

2.2. A first order system with a proportional controller in the negative feedback loop has an offset to a step input. This offset can be eliminated by

(a) adding a derivative mode to the controller

(b) adding an integral mode to the controller

(c) decreasing the magnitude of the gain of the proportional controller

(d) adding a delay in the controller loop.


2.3. Bootstrapping in a buffer amplifier circuit is used for

(a) increasing the input resistance

(b) reducing the power consumption

(c) decreasing the output resistance

(d) improving the frequency response.

2.4. A voltmeter has been connected between the input of a TTL inverting gate and ground. The gate is powered by 5 V. The voltmeter reading will be approximately

(a) 0 V (b) 2 V

(c) 4 V (d) 5 V


2.5. The advantage of a dual slope converter over successive approximation converter is that the dual slope converter

(a) is faster

(b) eliminates error due to drift

(c) can reduce the errors due to power supply

(d) does not require a stable voltage reference


2.6. The conversion time of an 8-bit successive approximation converter with a 1 MHz clock is nearly

(a) 512 m S (b) 256 m S

(c) 128 m S (d) 8 m S

2.7. The important feature of a micro controller is that it has an on-chip

(a) math co-processor

(b) program memory

(c) interface for I/O devices

(d) hardware multiplier.


2.8. The best size of the wire for measuring pitch diameters of ISO metric screw thread in terms of pitch, p, is

(a) p/2

(b) GATE IN 64

(c) 3p/4

(d) GATE IN 66

2.9. An elastic transducer is used to measure pressure in a vessel and it indicates a pressure of 3.2 bar. Atmospheric pressure is 1.01 bar. The absolute pressure in the vessel in bar is

(a) 1.01 (b) 2.19

(c) 3.20 (d) 4.21


2.10. A photo conductive transducer works on the principle that when a light beam strikes


(a) the material, its resistance decreases, which is sensed by an external circuit

(b) the barrier between transparent metal layer and a semi-conductor material, a voltage is generated

(c) the barrier between transparent metal layer and a semi-conductor material, a current is generated in the external circuit

(d) the cathode, it releases electrons, which are attracted towards anode, thereby producing electric current in the external circuit.


2.11. For alignment and testing of two surfaces at right angles, a constant deviation prism, also called an optical square, is used. It is a

(a) right angled prism (b) square prism

(c) pentagonal prism (d) hexagonal prism.

2.12. C 1 and C 2 are the activities of the ions on the two sides of a membrane. The Nernst potential developed across the membrane is proportional to

(a) GATE IN 68

(b) GATE IN 70

(c) GATE IN 72

(d) exp (C 1/C 2) .


2.13. The bandwidth of an electrocardiogram (ECG) amplifier is

(a) dc to 0.01 Hz (b) 0.05 to 500 Hz

(e) 550 to 1500 Hz (d) 2000 to 10000 Hz.

2.14. Korotkoff sounds are used

(a) as a reference for sound level measurement

(b) for studying heart muscle functioning

(c) for blood pressure measurement

(d) for study of heart valve functioning

2.15 In an electromagnetic blood flow meter, the induced voltage is directly proportional to the

(a) blood flow rate

(b) square root of the blood flow rate.

(c) square of the blood flow rate

(d) logarithm of the blood flow rate

Discussion Center







Email ID:

  Forgot Password?
 New User? Register!

Get 9,000+ Interview Questions & Answers in an eBook. Interview Question & Answer Guide
  • 9,000+ Interview Questions
  • All Questions Answered
  • 5 FREE Bonuses
  • Free Upgrades
  • Gate Books
  • Training Institutes
  • Gate FAQs
  • Mechanical Engineeering Books
  • Robotics Automations Engineering Books
  • Civil Engineering Books
  • Chemical Engineering Books
  • Environmental Engineering Books
  • Electrical Engineering Books
  • Electronics Engineering Books
  • Information Technology Books
  • Software Engineering Books
  • GATE Preparation Books
  • Exciting Offers

    GATE Exam, Gate 2009, Gate Papers, Gate Preparation & Related Pages

    GATE Overview | GATE Eligibility | Structure Of GATE | GATE Training Institutes | Colleges Providing M.Tech/M.E. | GATE Score | GATE Results | PG with Scholarships | Article On GATE | GATE Forum | GATE 2009 Exclusive | GATE 2009 Syllabus | GATE Organizing Institute | Important Dates for GATE Exam | How to Apply for GATE | Discipline / Branch Codes | GATE Syllabus for Aerospace Engineering | GATE Syllabus for Agricultural Engineering | GATE Syllabus for Architecture and Planning | GATE Syllabus for Chemical Engineering | GATE Syllabus for Chemistry | GATE Syllabus for Civil Engineering | GATE Syllabus for Computer Science / IT | GATE Syllabus for Electronics and Communication Engineering | GATE Syllabus for Engineering Sciences | GATE Syllabus for Geology and Geophysics | GATE Syllabus for Instrumentation Engineering | GATE Syllabus for Life Sciences | GATE Syllabus for Mathematics | GATE Syllabus for Mechanical Engineering | GATE Syllabus for Metallurgical Engineering | GATE Syllabus for Mining Engineering | GATE Syllabus for Physics | GATE Syllabus for Production and Industrial Engineering | GATE Syllabus for Pharmaceutical Sciences | GATE Syllabus for Textile Engineering and Fibre Science | GATE Preparation | GATE Pattern | GATE Tips & Tricks | GATE Compare Evaluation | GATE Sample Papers | GATE Downloads | Experts View on GATE | CEED 2009 | CEED 2009 Exam | Eligibility for CEED Exam | Application forms of CEED Exam | Important Dates of CEED Exam | Contact Address for CEED Exam | CEED Examination Centres | CEED Sample Papers | Discuss GATE | GATE Forum of | GATE Exam Cities | Contact Details for GATE | Bank Details for GATE | GATE Miscellaneous Info | GATE FAQs | Advertisement on GATE | Contact Us on OneStopGATE |
    Copyright © 2014. One Stop All rights reserved Testimonials |Link To Us |Sitemap |Privacy Policy | Terms and Conditions|About Us
    Our Portals : Academic Tutorials | Best eBooksworld | Beyond Stats | City Details | Interview Questions | India Job Forum | Excellent Mobiles | Free Bangalore | Give Me The Code | Gog Logo | Free Classifieds | Jobs Assist | Interview Questions | One Stop FAQs | One Stop GATE | One Stop GRE | One Stop IAS | One Stop MBA | One Stop SAP | One Stop Testing | Web Hosting | Quick Site Kit | Sirf Dosti | Source Codes World | Tasty Food | Tech Archive | Software Testing Interview Questions | Free Online Exams | The Galz | Top Masala | Vyom | Vyom eBooks | Vyom International | Vyom Links | Vyoms | Vyom World
    C Interview Questions | C++ Interview Questions | Send Free SMS | Placement Papers | SMS Jokes | Cool Forwards | Romantic Shayari