Practice Test: Question Set - 16
1. What is the ratio of output amplitude to input amplitude for a sinusoidal forcing function in a first order system?
- (A) 1
- (B) > 1
- (C) < 1
- (D) None of these
2. The second order system with the transfer function 4/(s2 + 2s + 4) has a damping ratio of
- (A) 2.0
- (B) 0.5
- (C) 1.0
- (D) 4.0
3. Flow rate through an orifice is _________ the pressure differential.
- (A) Proportional to
- (B) Inversely proportional to the square root of
- (C) Proportional to the square root of
- (D) Inversely proportional to the square of
4. The calibration data of a thermocouple with its cold junction at 0°C are given below.
The hot junction of the thermocouple is placed in a bath at 80°C, while its cold junction is at 20°C. What is the emf of thermocouple?
- (A) 3.26 mv
- (B) 0.80 mv
- (C) 2.46 mv
- (D) 2.43 mv
5. Which of the following is not the triple point of water?
- (A) 32°R
- (B) 273°K
- (C) 492°R
- (D) 32°F
6. Presence of a small amount of water in the organic systems can be determined by the _________ method.
- (A) Electrical conductivity
- (B) Polarimetry
- (C) Emission spectroscopy
- (D) Dielectric constant end loss factor
7. Measurement of sub-zero Celsius temperature in industry is done most commonly by
- (A) Thermocouples
- (B) Resistance thermometers
- (C) Gas thermometers
- (D) Bi-metallic thermometers
8. Working principle of radiation pyrometer is based on the
- (A) Wien's law
- (B) Kirchoff’s law
- (C) Stefan Boltzmann law
- (D) Seebeck effect
9. Characteristic equation is the denominator of _________ loop transfer function.
- (A) Open
- (B) Closed
- (C) Both (a) and (b)
- (D) Neither (a) nor (b)
10. Which of the following controllers has maximum offset?
- (A) P-controller
- (B) P-I controller
- (C) P-D controller
- (D) P-I-D controller
11. Smoke density of the flue gas going out of the chimney is measured by a
- (A) Polarograph
- (B) Thermal conductivity meter
- (C) Photo electric cell
- (D) Chromatograph
12. Which of the following flow-metering instruments is an areameter?
- (A) Venturimeter
- (B) Rotameter
- (C) Pitot tube
- (D) Hot wire anemometer
13. The experimental response of the controlled variable y(t) for a step change of magnitude ‘P’ in the manipulated variable x(t) is shown below: The appropriate transfer function of the process is
- (A) (Q/P) e-(Q/R)S/(TdS + 1)
- (B) (Q/R) e-TdS/(Q/P) (S + 1)
- (C) (Q/P) e-TdS/(Q/R) (S + 1)
- (D) (Q/R) e-(P/Q)S/(TdS + 1)
14. A magnetic flowmeter is
- (A) Based on the principle of Faraday's law
- (B) Capable of measuring the flow rate of slurries and electrolytes
- (C) Based on the linear relationship between the fluid flow rate and the
induced voltage
- (D) All (a), (b) and (c)
15. Which is the most suitable instrument for measuring pressure below 3 microns?
- (A) Mcleod gauge
- (B) Alphatron
- (C) Ionisation gauge
- (D) Bourdon gauge