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CCST Study Cards Level 1 > Domain 1 > Flashcards

Domain 1 Flashcards

1
Q

When a gas pressure is applied to the interior of an empty closed vessel the force is ______ on all surfaces

A. undiminished
B. halved
C. doubled
D. independent

A

A. Undiminished

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2
Q

A controller is being tuned for a fast control loop. It has proportional action and the gain has been adjusted for a value by the technician. As reset action is added to the loop, which of the following will need to take place? The technician will need to ______

A. Add Derivative
B. Increase the gain
C. Decrease the gain
D. Increase the dead time

A

C. Decrease the gain

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3
Q

What is the current flow in a circuit with a 24 VDC power supply and a resistance load of 2000 ohms?

A. 12 amps
B..020 amps
C. 20 mA
D. 12 mA

A

D. 12mA

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4
Q

Each controller has instructions as part of the device which affects the controller output based on the error signal. These are preset based on the dynamic loop response and are referred to by which of the following terms:

A. algorithm
B. reverse band
C. process lead lag
D. error compensation

A

A. algorithm

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5
Q

In an automobile instrumentation system, the fuel level and the coolant temperature are displayed to the driver and are examples of:

A. Setpoint
B. distributed variable
C. measured variable
D. disturbance variable

A

C. Measured variable

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6
Q

Which of the following calibration instruments will be the best choice to calibrate a high range electronic pressure transmitter for a range of 0 to 1000 PSIG?

A. Decade box
B. Squeeze bulb
C. Function generator
D. Dead weight tester

A

D. Dead weight tester

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7
Q

Approximately what is the pressure, in psig on the bottom of a 10 ft. flat bottom, open tank filled to 100% of capacity with a fluid that has a specific gravity of 1.1?

A. 2.50
B. 4.75
C. 9.50
D. 25.4

A

B. 4.75

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8
Q

A process variable, which is to be maintained at some desired value (temperature, pressure, level, flow) by means of manipulating another process variable, is the:

A. Measured variable
B. Controlled variable
C. Disturbance variable
D. Manipulated variable

A

B. Controlled variable

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9
Q

A fluid is flowing through a 10-inch diameter pipe at a velocity of 5ft/sec. When the pipe reduces to an 8-inch diameter, and all other flowing parameters remain the same, the fluid velocity becomes ________ ft/sec

A. 2.550
B. 6.075
C. 9.375
D. 12.75

A

C. 9.375

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10
Q

Liters per minutes is a unit of measurement for:

A. Flow
B. Level
C. Pressure
D. Temperature

A

A. Flow

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11
Q

Which of the following is not required for feet forward control applications?

A. Three mode controller
B. Timing for the correction
C. Measurement of the disturbance
D. What to correct for the disturbance

A

A. Three mode controller

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12
Q

When working with an instrument air system, the _____ of the air is a critical measurement and is dealt with in the ANSI/ISA 7.0 standard.

A. pressure
B. dew point
C. source humidity
D. molecular weight

A

B. Dew point

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13
Q

The range of values over which an input signal may be changed upon reversal of direction without any observable or measurable change in output is called:

A. Instrument accuracy
B. Reverse precision
C. Dead band
D. Zero point

A

C. Dead band

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14
Q

A typical process control loop must contain at least______ components.

A. 2
B. 3
C. 5
D. 6

A

B. 3

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15
Q

A 12-Volt battery rated to produce 2 amps of current for 50 hours is connected to a 400 ohm love. How long should the battery remain an energy producing capability?

A. 2 hours
B. 100 hours
C. 1500 hours
D. 2000 hours

A

D. 2000 Hours

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16
Q

A three wire RTD transmitter output is more accurate than a two wire arrangement. This increase in accuracy is due to which of the following:

A. Lead temperature will not affect the output.
B. Lead resistance affects are minimized
C. A simple transmitter may be used
D. Junction resistance is eliminated

A

B. Lead resistance affects are minimized

17
Q

If the measurement is calibrated for +50 to +250 degrees F, what milliamp output would represent +175 degrees F?

A. 8.0 milliamps
B. 12.0 milliamps
C. 14.0 milliamps
D. 16.0 milliamps

A

C. 14.0 milliamps

18
Q

A plant has a 40 ft. high water tank mounted on top of a 50 ft. platform. What is the water level in the tank, measured in feet. If a pressure gage on a lower lever, height 15 ft. reads 30 psig?

A. 12.3
B. 27.3
C. 34.3
D. 39.3

A

C. 34.3

19
Q

A properly calibrated pressure transmitter connected to a 15 ft. tall open tank with a water level 7.5 ft. would indicate a pressure of approximately

A. 9 psig
B. 15 psig
C. 90 inches of water.
D. 120 inches of water.

A

C. 90 inches of water

20
Q

The internal components of a control valve are generally referred to as the _____?

A. yoke
B. valve trim
C. both A and B
D. none of the above

A

B. Valve trim

CCST Study Cards Level 1 (1 decks)

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