Domain III System Design Flashcards
Which of the following standards applies to the development of embedded software for a SIL 3 - certified safety system?
a. ANSI/ISA 84
b. IEC 61311
c. IEC 61508
d. 20 CFR Part 11
c. IEC 61508
Which of the following protection techniques is acceptable for equipment located in a Class 1, Division 1 area?
a. Explosion-proof apparatus and nonincendive equipment
b. Explosion-proof apparatus and intrinsic safety
c. Dust ignition-proof and nonincendive equipment
d. Hermetically sealed and intrinsic safety
b. Explosion-proof apparatus and intrinsic safety
If an application requires an enclosure that resists corrosion and provides protection for outdoor use, dust, and hose-directed water, what type of enclosure should be selected?
a. NEMA 1 or IP10
b. NEMA 4x or IP56
c. NEMA 12 or IP52
d. NEMA 13 or IP54
b. NEMA 4x or IP56
Which of the following control valve body styles is MOST likely to develop blockage in a paper pulp slurry service?
a. Pinch
b. Characterized ball
c. Butterfly
d. Globe
d. Globe
According to the NFPA 79-2007, what are the corresponding standard wire colors for line voltage, AC control, DC control, and interlock circuits?
a. Blue, black, white, and red
b. Brown, red, yellow, and, orange
c. Black, red, yellow, and orange
d. Black, red, blue, and orange
d. Black, red, blue, and orange
R= r L/A
What is the resistance of 1000 ft of copper wire (specific resistance = 10.37) given a cross-sectional area of 10370 cmil and a wire temperature of 20° C?
a. 1 Ω
b. 2 Ω
c. 10Ω
d. 100Ω
a. 1 Ω
Which style of motor is BEST suited for use with variable frequency drives?
a. TEFC motors
b. High E motors
c. Linear DC motors
d. Inverter duty motors
d. Inverter duty motors
A horizontal tank contains a liquid with a dielectric constant greater than 2, and the temperature and composition of the liquid are variable. Which type of transmitter gives the BEST reproducibility when used to measure the level of a liquid in the tank?
a. Radar level detector
b. Bubble level detector
c. Capacitance level transmitter
d. Differential pressure transmitter
a. Radar level detector
When AC power wiring and DC signal wiring meet in a panel, which of the following practices BEST MINIMIZES electrical interference?
a. Using a different size wire
b. Crossing the wires at 90 degrees
c. Running the wires parallel to each other
d. Twisting the AC wires around the DC wires
b. Crossing the wires at 90 degrees
Using Modbus, what is the MAXIMUM level of precision available in one data register?
a. 8 bits
b. 16 bits
c. 24 bits
d. 32 bits
b. 16 bits
How is PID defined the phrase “PID control loop”?
a. Proportional Instrument Device
b. Piping Instrumentation Diagram
c. Percentage Integration Delta
d. Proportional Integral Derivative
d. Proportional Integral Derivative
P&ID is an acronym for which of the following?
a. Piping and Instrument Diagram
b. Piping and Installation Drawing
c. Process and Instruction Document
d. Process and Instrumentation Definition
a. Piping and Instrument Diagram
Which fuse has the quickest response to over currents?
a. Single-element
b. Dual-element
c. Time-delay
d. Dual-element time-delay
a. Single-element
Which of the following devices creates the least amount of electrical noise?
a. Variable speed drive
b. Switching power supply
c. Electronic lighting ballast
d. Regulated magnetic transformer power supply
d. Regulated magnetic transformer power supply
Which of the following protection techniques is acceptable for equipment located in a Zone 0 area?
a. Increased safety “e”
b. Oil immersion “o”
c. Intrinsic safety
d. Purged and pressurized
c. Intrinsic safety
