Practice Test: Question Set - 13
1. Dome temperature of blast furnace stove is most accurately measured by a
- (A) Radiation pyrometer
- (B) Platinum-platinum/rhodium thermocouple
- (C) Iron-constantan thermocouple
- (D) Platinum resistance thermometer
2. Resistance of a gas in a vessel is given by (where, P = pressure, V = volume of the vessel, n = no. of moles of the gas, R = gas constant)
- (A) V/nRT
- (B) nRT/V
- (C) nRT/P
- (D) P/nRT
3. The term analogous to voltage in a single tank system is the
- (A) Heat content of the system
- (B) Liquid volume in the tank
- (C) Flow rate
- (D) Level of liquid
4. Which of the following is not a differential pressure flow meter?
- (A) Rotameter
- (B) Flow nozzle
- (C) Orificemeter
- (D) Venturimeter
5. A negative gain margin expressed in decibels means a/an _________ system.
- (A) Stable
- (B) Unstable
- (C) Critically damped
- (D) None of these
6. ________ stability method uses open loop transfer function.
- (A) Nyquist
- (B) Mikhailov
- (C) Ruth
- (D) None of these
7. Humidity of air can be determined by a
- (A) Chromatograph
- (B) Sling psychrometer
- (C) Mass spectrometer
- (D) Polarimeter
8. The unit of 'time constant' of a system is the same as that of
- (A) Velocity
- (B) Time
- (C) (Time)-1
- (D) None of these
9. In a single tank system, the transfer function of level to inlet flow rate is
- (A) R/TS
- (B) R/(TS + 1)
- (C) 1/TS
- (D) None of these
10. An aneroid barometer measures the ________ pressure.
- (A) Atmospheric
- (B) Absolute
- (C) Vacuum
- (D) Gage
11. Pick out the wrong statement
- (A) Proportional controller is normally used for
level control in industrial applications
- (B) CSTR can be considered as a distributed parameter system
- (C) Distributed parameter approach gives partial differential equation
- (D) Non-linear behavior is exemplified by an on-off controller
12. What is the Laplace transform of impulse input having magnitude ‘X’?
- (A) X
- (B) X2
- (C) 1/X
- (D) 1
13. The closed loop pole of a stable second order system could be
- (A) Both real and positive
- (B) Complex conjugate with positive real parts
- (C) Both real and negative
- (D) One real positive and the other real negative
14. The offset introduced by proportional controller with gain Kc in response of first order system can be reduced by
- (A) Reducing value of Kc
- (B) Introducing integral control
- (C) Introducing derivative control
- (D) None of the above
15. Which thermocouple can be used to measure a temperature of around 1400°C?
- (A) Copper-constantan
- (B) Aluminium-Chromel
- (C) Platinum-platinum + rhodium
- (D) None of these
Next Tests: