chemical engineering MCQs – Page 241

Practise multiple-choice questions from chemical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering Mcqs

4801. Pressure of CO2 gas (which is a coolant) in the Calder-Hall nuclear reactor is ______________ kgf/cm2?
0

A. 50

B. 0.2

C. 35

D. 7

4802. For the time domain function f(t) = t, the Laplace transform of ?0 t f(t) dt is given by___________________?
0

A. 2/S3

B. 2/S2

C. 1/2 S3

D. 1/S3

4803. An ideal PID controller has the transfer function [1 + (1/0.55) + 0.25]. The frequency at which the magnitude ratio of the controller is 1, is________________?
0

A. 0.5/0.2

B. 0.2/0.5

C. 1/?(0.2 0.5)

D. 0.2 0.5

4804. The largest stable nucleus is ________________?
0

A. Pb-206

B. U-238

C. Bi-209

D. U-235

4805. Which of the following can measure temperatures in the range of 20 to 300C ?
0

A. Vapor pressure thermometer

B. Mercury in glass thermometer

C. None of these

D. Resistance thermometer

4806. The ratio of atomic radius to its nuclear radius is about___________________?
0

A. 1015

B. 108

C. 1012

D. 105

4807. Thermocouple is suitable for measuring_________________?
0

A. Liquid temperatures only

B. Very high temperatures only

C. Very low temperatures only

D. Both high and low temperatures

4808. A non-linear chemical system is exemplified by a/an_________________?
0

A. Mixer

B. Isothermal CSTR

C. None of these

D. Non-isothermal CSTR

4809. In a single tank system, the transfer function of level to inlet flow rate is__________________?
0

A. R/(TS + 1)

B. R/TS

C. None of these

D. 1/TS

4810. Which of the following thermocouples is capable of measuring a temperature of -50C ?
0

A. Chromel-Alumel

B. Copper-constantan

C. Platinum-platinum + rhodium

D. Iron-constantan

4811. Thermistors which have a very high temperature co-efficient of resistivity belong to the class of solid called________________?
0

A. Semi conductors

B. Conductors

C. Dielectrics

D. Insulators

4812. Which of the following is the dynamic characteristics of an instrument ?
0

A. Dead zone

B. Reproducibility

C. Fidelity

D. Sensitivity

4813. For measuring the temperature of a red hot furnace, which is the most suitable instrument ?
0

A. Bimetallic thermometer

B. Optical pyrometer

C. Platinum resistance thermometer

D. Thermocouple

4814. Emission of ?-particles during radioactive decay of a substance is from__________________?
0

A. Nucleus

B. Outermost shell

C. Innermost shell

D. None of these

4815. Extraction of uranium from its ore is done using ______________ methods?
0

A. Chemical

B. Electrometallurgical

C. Pyrometallurgical

D. Physical beneficiation

4816. Which of the following is an undesirable dynamic characteristic of an instrument ?
0

A. Reproducibility

B. Dead zone

C. Time lag

D. Static error

4817. The frequency at which maximum amplitude ratio is attained is called the ______________ frequency?
0

A. Natural

B. Resonant

C. Corner

D. Cross-over

4818. A heterogeneous reactor is the one, in which the moderator and the________________?
0

A. Fuel are present in different phases (e.g. uranium and heavy water)

B. None of these

C. Coolant are different materials

D. Coolant are present in different phases (e.g., heavy water and graphite)

4819. The emission of an a-particle causes the resultant nucleus to have____________________?
0

A. Less atomic weight and less atomic number

B. Less atomic weight and more atomic number

C. More atomic weight and less atomic number

D. None of these

4820. In a pressurised water reactor (PWR), the___________________?
0

A. Fuel is natural uranium and heavy water acts both as moderator & coolant

B. Coolant water boils in the core of the reactor

C. Coolant water is pressurised to prevent bulk boiling of water in the core

D. Use of moderator is not required

Previous Next

Showing 4801 to 4820 of 8709 mcqs