ISA CCST Level 1 Study Guide Ultimate Exam Prep Guide: Questions & Answers for Success

ISA CCST Level 1 Study Guide Final Test

The time constant (first order lag) in a transmission system is the time

necessary (after dead time) following an upset for the response curve

to reach_______ of its final value.


A. 100%


B. 63.2%


C. 50%


D. 37.9% - ✔️✔ Correct Answer B. 63.2%


Load cells and strain gages measure the amount of material in a tank

by measuring:


A. thermal conductivity


B. hydrostatic head


C. ultrasonic frequency

,D. weight - ✔️✔ Correct Answer D. weight


Skip 49. due to elecrical circuit bias schematic - ✔️✔ Correct

Answer


The_____ variable is the part of a process which is adjusted to close

the gap between the set point and the value of the controlled

variable.


A. manipulated


B. measured


C. controlled


D. disturbance - ✔️✔ Correct Answer A. manipulated


The desired value of the process variable is called the ______


A. measurement signal


B. set point


C. controlled variable

, D. output signal - ✔️✔ Correct Answer B. set point


An undesired change in a variable which tends to adversely affect the

value of a controlled vaiable, is normally called a (an):


A. process lag


B. measurement error


C. disturbance


D. error signal - ✔️✔ Correct Answer C. disturbance


In a home heating system, the room temperature is the:


A. manipulated variable


B. setpoint


C. controlled variable


D. disturbance variable - ✔️✔ Correct Answer C. controlled

variable


The intregal action which is part of a PID algorithm is often called: