Users Also Read
Read MCQ's/Objective questions
MCQ's Search Engine
Chemical Engineering Basics
Chemical Engineering Plant Economic
Chemical Engineering Thermodynamic
Chemical Process Industries
Chemical Reaction Engineering & reactor design
Environmental Engineering
Fertiliser Technology
Fluid Mechanics
Fuels and Combustion
Furnace Technology
Heat Transfer
Mass Transfer
Materials and Construction
Mechanical Operations
Nuclear Power Engineering
Petroleum Refinery Engineering
Polymer Technology
Process Equipment and Plant Design
Refractory Technology
Stoichiometry
Home⇒ Engineering⇒
Process control and instrumentation
1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q41 ⇒ The temperature of tempering oil baths maintained at 400°C during heat treatment of steel is measured by a/an __________ thermocouple. iron-constantan [other wrong options] [Discuss in forum] chromel-alumel platinum-platinum/rhodium none of these. |
Q42 ⇒ The maximum service temperature for fibre glass used as thermocouple wire insulation material is __________ °C. 500 [other wrong options] [Discuss in forum] 250 750 1000 |
Q43 ⇒ Nichol's chart deals with closed loop values vs. open loop values. [other wrong options] [Discuss in forum] A.R. vs. phase lag of first order. A.R. vs. phase lag of second order. frequency response values of controllers. |
Q44 ⇒ Which of the following relates the absorption & evolution of heat at the junctions of a thermocouple to the current flow in the circuit? Peltier effect [other wrong options] [Discuss in forum] Seebeck effect Joule heating effect Thomson effect |
Q45 ⇒ __________ temperature scale assigns 0° to the 'ice point' and 80° to the 'steam point'. Reumur [other wrong options] [Discuss in forum] Celcius Rankine Farenhite |
Q46 ⇒ Bode diagram is a plot of log (AR) vs. log (f) and (Φ) vs. log (f). [other wrong options] [Discuss in forum] log (AR) vs. f and log Φ vs.f. AR vs. log (f) and Φ vs. log (f). none of these. |
Q47 ⇒ The initial value (t=0) of the unit step response of the transfer function [(s + 1)/(2s + 1)] is 42737 [other wrong options] [Discuss in forum] 0 1 2 |
Q48 ⇒ Thermodynamic celcius scale of temperature measurement is both (b) and (c) [other wrong options] [Discuss in forum] defined on the basis of melting point of ice and evaporation temperature of water vapor. defined on the basis of melting point of ice and condensation temperature of water vapor. having an interval of 100° between ice point to steam point. |
Q49 ⇒ "A control system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at the crossover frequency." This is __________ criterion. Bode stability [other wrong options] [Discuss in forum] Nyquist Routh stability none of these |
Q50 ⇒ An amplitude ratio of 0.1 corresponds to __________ decibels. -20 [other wrong options] [Discuss in forum] 20 10 -10 |
Q51 ⇒ Which of the systems having following transfer functions is stable? 1/(s2 + 2s + 2) [other wrong options] [Discuss in forum] 1/(s2+ 2) 1/(s2-2s + 3) exp(-20s)/(s2 + 2s-l) |
Q52 ⇒ The calibration data of a thermocouple with its cold junction at 0°C are given be 2.46 mv [other wrong options] [Discuss in forum] 3.26 mv 0.80 mv 2.43 mv |
Q53 ⇒ Which of the following is an undesirable dynamic characteristic of an instrument ? Time lag [other wrong options] [Discuss in forum] Reproducibility Dead zone Static error |
Q54 ⇒ For the block diagram shown bel τl S(τm S + 1) (τp S + 1) +Kc . Kp . Km (τl s + 1) e-τdS = 0 [other wrong options] [Discuss in forum] τl S (τps + 1) + Kc . Kp (τlS + 1) e-τd s = 0 (τmS + 1) (τpS + 1) + Km . Kp e-τd S = 0 (τms + 1) (τp s + 1) + Kc . Kp . Km . e-τdS = 0 |
Q55 ⇒ Flapper nozzle is used in a/an __________ controller. pneumatic [other wrong options] [Discuss in forum] electronic hydraulic none of these |
Q56 ⇒ Which of the following controllers has maximum offset ? P-controller [other wrong options] [Discuss in forum] P-I controller P-D controller P-I-D controller |
Q57 ⇒ Smoke density of the flue gas going out of the chimney is measured by a photo electric cell [other wrong options] [Discuss in forum] polarograph thermal conductivity meter chromatograph |
Q58 ⇒ When a bare thermocouple is covered by a protective sheath, the response becomes slower and non-oscillatory. [other wrong options] [Discuss in forum] faster and oscillatory. faster and non-oscillatory. slower and oscillatory. |
Q59 ⇒ Strain gage pressure transducers are used to measure __________ pressures. both (a) and (b) [other wrong options] [Discuss in forum] gage as well as vacuum absolute as well as differential neither (a) nor (b) |
Q60 ⇒ Bourdon gauges are used for measuring pressure (kg/cm2 ) > 2 (gauge) [other wrong options] [Discuss in forum] < atmospheric < 2 (gauge) > 10 (absolute) |
Or |