Related Questions

Process degree of freedom indicates __________ number of controllers to be used.
A The maximum
B The minimum
C Both maximum and the minimum
D Nothing about the
Positioning controllers are used for
A Low loads
B Temperature changes
C High loads
D Flow rate changes
Computer-based controllers:
A should be built in a modular fashion wherever possible
B are very difficult to change
C are very flexible
D (a) and (c) above
E None of the above
Analog and digital controllers:
A cost the same to build
B accept the same input signals
C can be changed with equal case
D All of the above
E None of the above
Today, programmable controllers:
A are more powerful then the first controllers on the market
B are relatively low cost compared with the original digital equipment available for industrial control
C can be cost effective even when replacing just a few relays
D All of the above
E None of the above
Which of the following controllers has maximum offset?
A P-controller
B P-I controller
C P-D controller
D P-I-D controller
Which of the following controllers has the least maximum deviation?
A P-controller
B P-I controller
C P-I-D controller
D P-D controller
Stabilising time for the controllers is the time required for the response to reach __________ percent of its ultimate value.
A 63.2
B 87.5
C 95
D 100
In condensers used in thermal power plants, steam is normally used in shell side and cooling water on the tube side, because of the reason that
A Compared to the mass flow rate of cooling water, the rate of condensation of steam is invariably smaller
B Maintaining vacuum on tube side is more difficult than that on the shell side
C Water velocity can be increased conveniently to increase the overall heat transfer co-efficient because of its lower specific volume compared to steam
D Condenser can act as a storage unit for condensed steam
Coffee A costs 75 cents per pound. It is mixed with Coffee B, which normally costs 80 cents per pound, to form a mixture that costs 78 cents per pound. If there are 10 pounds of the mix, how many pounds of Coffee A were used in the mix?
A 3
B 4
C 4.5
D 5

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