MCQGeeks
0 : 0 : 1
CBSE
JEE
NTSE
NEET
English
UK Quiz
Quiz
Driving Test
Practice
Games
Quiz
Chemical Engineering
Process Control And Instrumentation
Quiz 2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Q.1
Thermistor, which has high temperature co-efficient of resistivity, is used as the sensing element in resistance thermometer. It is a/an
Insulator
Conductor
Solid semi-conductor
Liquid semi-conductor
Q.2
Pick out the first order system from among the following.
Damped vibrator
Mercury in glass thermometer kept in boiling water
Interacting system of two tanks in series
Non-interacting system of two tanks in series
Q.3
Non-metallic diaphragm used as pressure sensor in instruments is generally made of
Teflon
Synthetic rubber
Bakelite
Thick paper
Q.4
__________ thermometer can not measure sub-zero (< 0° C) temperature,
Mercury in glass
Bimetallic
Vapor pressure
Resistance
Q.5
Which of the following can not measure a temperature of 1600°C ?
Platinum resistance thermometer
Thermocouple
Photo-electric pyrometer
Radiation pyrometer
Q.6
Which of the following thermocouples can measure the maximum temperature?
Platinum-rhodium
Tungsten-molybdenum
Chromel-alumel
Iron-constantan
Q.7
A barometer measures the __________ pressure.
Absolute
Gauge
Absolute as well as gauge
Dynamic
Q.8
A mercury barometer measures the __________ pressure.
Atmospheric
Gauge
Vacuum
Absolute
Q.9
Bode diagram are generated from output response of the system subjected to which of the following input?
Impulse
Step
Ramp
Sinusoidal
Q.10
Working principle of mercury in glass thermometer is based on the __________ of mercury with increase in temperature.
Increase of pressure
Increase of thermal conductivity
Volumetric expansion
Differential linear expansion
Q.11
Find the ultimate gain and frequency for a proportional controller in the case of a process having the transfer function G
p
(s) = 1/(4s + 1)(2s + 1)(s + 1).
W = 1/√14, K
c
= 45/7√14
W = √(7/6), K
c
= 46/3
W = 1, K
c
= 13
W = √(7/8), K
c
= 45/4
Q.12
Temperature measurement range of iron-constantan thermocouple is 0 to 870°C. It can be used to measure sub zero temperature, because at lower temperature
Emf produced is very low of the order of microvolt
Embrittlement of iron occurs
Rusting of iron takes place
Both B and C
Q.13
A proportional controller with a gain of Kc is used to control a first order process. The offset will increase, if
Kc is reduced
Kc is increased
Integral control action is introduced
Derivative control action is introduced
Q.14
Radiation thermometer can not measure the temperature
Inside a pressure vessel
Of an object without coming in contact with it
Of liquid oxygen
Of moving objects at high temperature
Q.15
Liquid flow rate in a small channel is best measured by a/an
Weir
Pitot tube
Vane meter
Venturimeter
Q.16
High temperature of around 2000°C of incandescent gas mantles is measured by a/an
Specially designed thermocouple
Optical pyrometer
Radiation pyrometer
None of these
Q.17
Zirconia probe is used for the continuous measurment of __________ flue gases going out of the furnace.
Oxygen in
Carbon dioxide in
Carbon monoxide in
Temperature of
Q.18
Which of the following filled system expansion thermometer has the capability to measure the lowest temperature?
Mercury in glass thermometer
Mercury in steel thermometer
Alcohol in glass thermometer
Fused metal (Na or K) in steel thermometer
Q.19
A bolometer is
Used for the measurement of thermal radiation
An element which senses optical input and delivers thermal output
Both A & B
Neither A nor B
Q.20
A magnetic flowmeter is
Based on the principle of Faraday's law
Capable of measuring the flow rate of slurries and electrolytes
Based on the linear relationship between the fluid flow rate and the induced voltage
All of the above
Q.21
Temperature measurement by optical pyrometer is done above __________ point, which is 1063°C.
Antimony
Gold
Silver
Nickel
Q.22
Temperature measuring instruments are standardised mostly with __________ points of pure substances.
Melting
Boiling
Both A & B
Neither A nor B
Q.23
Flow rate through an orifice is __________ the pressure differential.
Proportional to
Inversely proportional to the square root of
Proportional to the square root of
Inversely proportional to the square of
Q.24
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
Nyquist
Routh stability
None of these
Q.25
In a single tank system, the transfer function of __________ to inlet flow rate is 1/TS+1.
Outlet flow rate
Level
Both A & B
Neither A nor B
Q.26
Which of the following is not a speed measuring instrument?
Psychrometer
Stroboscope
Tachometer
All of the above
Q.27
A stable system is the one
For which the output response is bounded for all bounded input
Which exhibits an unbounded response to a bounded input
Which satisfies the conditions for a servo problem
None of these
Q.28
Which of the following is the dynamic characteristics of an instrument?
Reproducibility
Sensitivity
Dead zone
Fidelity
Q.29
Dead zone in an instrument must be less than __________ percent of the scale.
0.2
1.5
4
8
Q.30
A non-linear system will have __________ steady state values.
One
More than one
Two
Three
Q.31
Nitrogen gas constant volume thermometer is suitable for measuring a temperature of __________ °C.
0-100
< 0
> 100
> 50
Q.32
Which of the following instruments is not used for measuring sub-zero (<0°) temperatures?
Platinum resistance thermometer
Mercury in glass thermometer
Vapor pressure thermometer
Radiation pyrometer
Q.33
Bode stability method uses __________ loop transfer function.
Open
Closed
Either A or B
Neither A nor B
Q.34
Characteristic equation is the denominator of __________ loop transfer function.
Open
Closed
Both A & B
Neither A nor B
Q.35
Which of the systems having following transfer functions is stable?
1/(s²+ 2)
1/(s²-2s + 3)
1/(s² + 2s + 2)
Exp(-20s)/(s² + 2s-l)
Q.36
For an input forcing function, X(t) = 2t², the Laplace transform of this function is
2/s²
4/s²
2/s³
4/s³
Q.37
The second order system with the transfer function 4/(S² + 2S + 4) has a damping ratio of
2.0
0.5
1.0
4.0
Q.38
Liquid argon level in a pressurised storage tank (at 3 kg/cm² ) is measured by a/an
Gage glass
External float gage
Differential pressure gage
None of these
Q.39
Thermodynamic celcius scale of temperature measurement is
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
Both B and C
Q.40
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)
V/nRT
nRT/V
nRT/P
p/nRT
Q.41
Strain gage pressure transducers are used to measure __________ pressures.
Gage as well as vacuum
Absolute as well as differential
Both A & B
Neither A nor B
Q.42
Pressure of 0.0001 absolute psi can be measured by __________ gauge.
Mcloid
Pirani
Thermocouple
None of these
Q.43
Helium gas constant volume thermometer is suitable for the measurement of a temperature of __________ °C.
< 100
< 0
> 0
> 800
Q.44
The time constant of a unity gain, first order plus time delay process is 5 min. If the phase lag at a frequency of 0.2 rad/min is 60°, then the dead time (in minutes) is
5π/12
π/6
π/12
π/3
Q.45
A non-linear chemical system is exemplified by a/an
Isothermal CSTR
Mixer
Non-isothermal CSTR
None of these
Q.46
The unit of 'time constant' of a system is the same as that of
Velocity
Time
(time)⁻¹
None of these
Q.47
Thermal well made of __________ gives the fastest speed of response, while measuring temperature by thermocouples.
Steel
Vycor (a glass)
Nichrome
Inconel
Q.48
The deflection in diaphragm (which is used as pressure sensor in pneumatic and electronic instruments) is dependent on the metal thickness, its diameter (d) and shape & number of corrugations. Its deflection is proportional to
D
D²
D³
D⁴
Q.49
Compositional analysis of __________ is done using mass spectrometer.
An isotope
Natural gas
A solid
An alloy
Q.50
Routh stability method uses __________ loop transfer function.
Open
Closed
Either A or B
Neither A nor B
0 h : 0 m : 1 s
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Report Question
×
What's an issue?
Question is wrong
Answer is wrong
Other Reason
Want to elaborate a bit more? (optional)
Support mcqgeeks.com by disabling your adblocker.
×
Please disable the adBlock and continue.
Thank you.
Reload page