Name of the Organisation : University Of Library - Cochin University of Science and Technology
Name of the Exam : Common Admission Test (CAT)
Document Type : Sample Question Paper
Year: 2016
Subject: Instrumentation

Website : www.library.cusat.ac.in/cat/2016/
Download Model/Sample Question Papers: http://www.indianjobtalks.com/upload...umentation.pdf

Instrumentation Model Question Paper :
1. Which of the following is the characteristic of ideal operational amplifier?
A. Input impedance zero
B. Output impedance zero
C. Bandwidth zero
D. Gain zero

2. The polarity of voltage applied to the collector of a NPN transistor in the commonemitter configuration is
A. positive
B. negative
C. 'zero' voltage
D. any polarity

3. Four 20 m fd capacitors are connected in series. Its effective value is
A. 10 m fd
B. 80 m fd
C. 40 m fd
D. 5 m fd

4. A device that converts electric energy into mechanical energy is
A. dynamo
B. motor
C. transformer
D. none of the above

5. The following symbol refers to
A. FET
B. n-channel MOSFET
C. p-channel MOSFET
D. None of the above

6. Efficiency of bridge rectifier is
A. 20.3%
B. 40.6%,
C. 60.9%
D. 81.2%

7. Which method is suitable for flaw detection?
A. Photography
B. Radio frequency
C. Laser
D. Ultrasonic

8. Anti-aliasing filter is
A. high-pass filter
B. low-pass filter
C. band-pass filter
D. notch filter

9. Which of the following types of ADCs is used in noisy environment?
A. Integrating type
B. Successive approximation type
C. Flash
D. None of the above

10. Sampling theorem states that, if fs is the sampling frequency and fh is the highest frequency in the signal, then
A. fz > 2fh
B. fs < 2fh
C. 2fs >fh
D. sfs <2fh

11. Which of the following types of ADCs requires Sample and Hold device?
A. Integrating type
B. Successive approximation type
C. Flash
D. None of the above

12. What is the resolution of 8-bit ADC operating in 10 V range?
A. 39.06 mV
B. 2.44 mV
C. 0.625 V
D. None of the above

13. Which antennas are used in microwave communication?
A. Long wave antennas
B. Rhombic antennas
C. Parabolical antennas
D. Any of the above

14. A MOSFET differs from a JFET in the sense that it has no
A. Channel
B. Gate
C. P-N junction between gate and channel
D. Substrate

15. The output voltage Vo in the following circuit (assume ideal Zener diode)
A. can vary between 0V and +7.5V
B. can vary between 0V and -7.5V
C. can vary between +7.5V and -7.5V
D. always zero

16. The switching speed of Schottky diode
A. is lower than that of p-n junction diode
B. is the same as that of p-n junction diode
C. is higher than that of p-n junction diode
D. may be lower or higher than that of a p-n junction diode

17. If the input of the differentiator is square wave, the output will be a ……. waveform
A. triangular
B. spike
C. saw tooth
D. cosine

18. For narrow band pass filter, the Q value should be
A. Q < = 10
B. Q > 10
C. Q < 10
D. Q > = 10

19. A RC Phase shift oscillator is used to generate ……… waveform.
A. sine
B. square
C. triangular
D. saw-tooth

20. Which one of the following logic gates is similar to the function of two switches in series?
A. OR
B. Exclusive OR
C. NOR
D. AND

21. Compared with CMOS devices, the TTL devices have
A. high power consumption
B. low power consumption
C. low speed operation
D. None of the above

22. Two 4-bit binary numbers ‘1000’ and ‘0100’ are multiplied. What is the decimal value of the result?
A. 1000
B. 100
C. 32
D. None of the above