Question 19:The most commonly used method of secondary recovery is: A - Fire flooding B - Steam flooding C - Miscible flooding D - Water flooding
INST_6010_Basic_Transmitter_Principles
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Question 1: A current to pneumatic (I/P) transducer is used when: A - Signals must be applied to computer control B - A variable resistor changes the output current C - Signals must be transmitted over very short distances D - Signal transmissions are affected by extremely low temperatures _______________________________________________
Question 2: Live zero is: A - The maximum output for a transmitter B - The maximum input for a transmitter C - The minimum output for a transmitter D - The minimum input for a transmitter _______________________________________________
Question 3: Although there are many designs of pneumatic transmitters that may vary in detail, the basic element used is the: A - Pneumatic relay B - Flapper-nozzle mechanism with an air-amplifying device C - Bellows D - Bourdon tube _______________________________________________
Question 4: A relay is a pneumatic amplifier. The function of the relay is to convert: A - A small change in input signal to a large change in the output signal B - Any change in input signal to negative feedback C - An increase in feedback pressure to differential pressure D - Negative feedback to the input or process variable _______________________________________________
Question 5: The major component of a basic electronic transmitter that consists of a variable resistor, capacitor, or an inductance coil that changes in proportion to the mechanical input is called: A - Pneumatic relay B - A mechanical sensing device C - An amplifier with feedback D - An electrical transducer _______________________________________________
Question 6: In a capacitance type differential pressure detector containing two capacitor plates, the position of the sensing diaphragm is detected by the capacitor plates on: A - Top of the sensing diaphragm B - The pressure element between the sensing diaphragm and capacitor plates C - Both sides of the sensing diaphragm D - One side of the sensing diaphragm _______________________________________________
Question 7: A proportional relationship between the input and output valves of a transmitter is known as: A - Positive feedback B - On - off C - Feedforward D - Negative feedback _______________________________________________
Question 8: In an electronic balancing system, the detector is a differential transformer whose primary windings are: A - Amplified by the feedback motor B - Excited by the dc amplifier C - Excited by an oscillator D - Compressed by the force bar _______________________________________________
Question 9: If you were asked to recommend the type of transmitter best suited for a system where the electronic input signal had to be transmitted over a long distance to a computer to a non-pneumatic controller, what type of transmitter would you recommend? A - Pneumatic to current B - gas-sensitive mechanical C - Dual diaphragm electronic D - Current to pneumatic _______________________________________________
Question 10: Capacitance is:
A - Directly proportional to the spacing between the plates of the capacitor B - Inversely proportional to the area of the plates of the capacitor C - Inversely proportional to the dielectric between plates of the capacitor D - None of the above _______________________________________________
Question 11: Pneumatic to current transducers are used when:
A - Signals must be transmitted over very short distances B - An electric input signal is transmitted to a computer or data logger C - Air is available at a controller or receiver D - None of the above ______________________________________________
Question 12: The internal resistance set up in a material when an external load is applied is referred to as:
A - Strain B - Load C - Deformation D - Stress _______________________________________________
Question 13: The factors that influence the value of capacitance can be expressed as the mathematical equation C = . In this equation, "s" equals:
A - capacitance B - area of the plates (m2) C - dielectric constant, no units D - distance between the plates (m) _______________________________________________
Question 14: A basic electronic transmitter consists of three components: mechanical sensing device, transducer and amplifier. Output from the amplifier section of the transmitter is: A - fed back to the mechanical sensing device to create a complimentary force to the input B - fed back to the transducer to create a complimentary force to the input C - fed back to the transducer to create an opposing force to the input D - fed back to the mechanical sensing device to create an opposing force to the input _______________________________________________ Question 15: A pneumatic steam pressure transmitter is calibrated for a range of 0 to 2000 kPa. If the input is 1500 kPa, the output of the transmitter is: (Output span equals 80 kPa and live zero equals 20 kPa).
A - 800 kPa B - 680 kPa C - 68 kPa D - 80 kPa _______________________________________________
Question 16: In a case where the current output from an electronic controller must be adapted so it can operate a control valve with a pneumatic actuator, a pneumatic to current transducer would be used.
A - True B - False _______________________________________________
Question 17: Strain gages work on the principle of:
A - A change in capacitance results from the movement of an elastic deformation element B - A change in resistance when a conductor is lengthened and reduced in cross sectional area C - Having a wire vibrating at its resonant frequency which converts a variable pressure into a change of the resonant frequency D - None of the above _______________________________________________
Question 18: The nozzle of a pneumatic transmitter receives an air supply pressure of: A - 140 kPa B - 140 psi C - 40 psi D - 20 kPa _______________________________________________
Question 19: As a pneumatic amplifier, the function of a relay is to: A - convert a small change in input signal to a large change in the output signal B - convert a small change in output signal to a large change in the input signal C - prevent a small change in input signal, negating a large change in the output signal D - prevent a small change in output signal, negating a large change in the input signal _______________________________________________
Question 20:
An electric pressure transmitter is calibrated for a range of 0 to 2000 kPa. If the input is 1300 kPa, the output of the transmitter is: (output span equals 16 mA and live zero equals 4 mA) Use the formula:
A - 98.4 mA
B - 41.6 mA
C - 14.4 mA
D - 14.4 A
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Question 21:
A device that receives an input in one physical quantity and modifies or changes the signal into another form is called a: