Practice Test: Question Set - 12
1. Which of the following thermometers is not suitable for distant reading upto 60 meters?
- (A) Vapor pressure thermometer
- (B) Mercury in glass thermometer
- (C) Constant volume gas thermometer
- (D) Resistance thermometer
2. Temperature control of an exothermic chemical reaction taking place in a CSTR is done with the help of cooling water flowing in a jacket around the reactor. The types of valve and controller action to be recommended are
- (A) Air to open valve with the controller direct acting
- (B) Air to close valve with the controller indirect acting
- (C) Air to open valve with the controller indirect acting
- (D) Air to close valve with the controller direct acting
3. The transfer function of a second order system is
- (A) 1/(T2s2
+ 2ξTs + 1)
- (B) 1/(T2s2
+ 2Ts + 1)
- (C) 1/(T2s2
+ 2ξT + 1)
- (D) None of these
4. Thermal well made of _________ gives the fastest speed of response, while measuring temperature by thermocouples.
- (A) Steel
- (B) Vycor (a glass)
- (C) Nichrome
- (D) Inconel
5. Range of hydrogen gas constant volume thermometer is _________ °C.
- (A) -10 to 20
- (B) 0 to 100
- (C) 100 - 500
- (D) 400 - 1000
6. With increase in temperature, the electrical conductivity of the platinum used in the resistance thermometer
- (A) Increases
- (B) Decreases
- (C) Remain constant
- (D) Increases exponentially
7. In an exothermic chemical reactor, the manipulated variable is the flow rate of
- (A) Coolant
- (B) Reactants
- (C) Product
- (D) None of these
8. For measuring the temperature of a red hot furnace, which is the most suitable instrument?
- (A) Platinum resistance thermometer
- (B) Thermocouple
- (C) Optical pyrometer
- (D) Bimetallic thermometer
9. The fluid used in hydraulic controller is
- (A) Water
- (B) Steam
- (C) Air
- (D) Oil
10. Bourdon tube is never made of
- (A) Phosphor bronze
- (B) Monel metal
- (C) Stainless steel
- (D) Cast iron
11. Which of the following thermocouples is the most suitable for measuring a temperature of about 1600°C in an oxidizing atmosphere?
- (A) Platinum-platinum + rhodium
- (B) Iron-constantan
- (C) Copper-constantan
- (D) Chromel-alumel
12. Minute depression of freezing point of a liquid solvent on addition of a solid solute can be best measured by a
- (A) Beckman thermometer
- (B) Dilatometer
- (C) Mercury thermometer
- (D) Bimetallic thermometer
13. Degree to which an instrument indicates the changes in measured variable without dynamic error is called its
- (A) Speed of response
- (B) Reproducibility
- (C) Fidelity
- (D) Static characteristics
14. The pressure sensing element of elastic type pressure gauge is never made in the form of a
- (A) Bellow
- (B) Diaphragm
- (C) Strip
- (D) Bourdon tube
15. Temperature measurement by optical pyrometer is done above _________ point, which is 1063°C.
- (A) Antimony
- (B) Gold
- (C) Silver
- (D) Nickel
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