Questions and answers for exam Preparation

MCQs

Total Questions : 1634 | Page 162 of 164 pages

Question 1611. Which is the strongest paramagnetic gas ?

Discuss Question

Answer: Option B. -> O2
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1612. Which of the following cannot measure a temperature of 1600°C ?

Platinum resistance thermometer
Thermocouple
Photo-electric pyrometer
Radiation pyrometer

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Answer: Option A. -> Platinum resistance thermometer
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1613. A typical example of a physical system with under damped characteristic is a____________________?

U-tube manometer
Spring loaded diaphragm valve
CSTR with first order reaction
Thermocouple kept immersed in a liquid filled thermowell

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Answer: Option B. -> Spring loaded diaphragm valve
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1614. In a closed loop system, the process to be controlled is an integrating process with transfer function 1/2s. The controller proposed to be used in an integral controller with transfer function 1/T1s. When a step change in set point is applied to such a closed loop system, the controlled variable will exhibit__________________?

Overdamped response
Underdamped response
Undamped response
Unstable response

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Answer: Option B. -> Underdamped response
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1615. Working principle of mercury in glass thermometer is__________________?

Volumetric expansion
Pressure rise with temperature
Linear expansion
None of these

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Answer: Option A. -> Volumetric expansion
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1616. The root locus plot of the roots of the characteristics equation of a closed loop system having the open loop transfer function K (s + 1)/[2 (2s + 1) (3s + 1)] will have a definite number of loci for variation of K from 0 to ∞. The number of loci is_______________?

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Answer: Option C. -> 3
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1617. Which of the following filled system expansion thermometers has the lowest positive temperature measurement capability ?

Mercury in glass thermometer
Alcohol in glass thermometer
Fused metal (Na or K) in steel thermometer
Nitrogen in steel thermometer

Discuss Question

Answer: Option B. -> Alcohol in glass thermometer
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1618. Water is entering a storage tank at a temperature T0 and flow rate Q0 and leaving at a flow rate Q and temperature T. There are negligible heat losses in the tank. The area of cross-section of the tank is A0. The model that describes the dynamic variation of temperature of water in the tank with time is given as________________?