53851. Which digital IC package type makes the most efficient use of printed circuit board space?
53852. Which test equipment best allows a comparison between input and output signals?
53853. The duty cycle of a pulse is determined by which formula?
53854. What is the next step after discovering a faulty gate within an IC?
53855. The use of a multimeter with digital circuits allows the measurement of:
53856. The use of triggered sweep when using an oscilloscope provides more accuracy in which area?
53857. The time needed for a pulse to increase from 10% to 90% of its amplitude defines:
53858. Which device would best aid in shorted track detection?
53859. The three basic steps for fixing a failure are ISOLATE, DIAGNOSE, and REPAIR.
53860. An internal logic gate that shorts to either +VCC or ground will cause the inputs or output to be stuck either LOW or FLOATING.
53861. A noise problem in a digital circuit is often called a glitch.
53862. The time interval between the start of two consecutive pulses is called pulse repetition time.
53863. "Train" and "single" is the mode selection for a _______.
53864. The use of a logic probe may be improved through the use of a(n) ________.
53865. The control of digital circuits is usually achieved with _________.
53866. In order for a logic probe to operate, its red and black leads must first be connected to a ________.
53867. The ideal test equipment to use for locating shorts in digital circuitry is the ________ and _______.
53868. The results of internal IC failures will usually be noticed during the ______ phase of troubleshooting.
53869. Erratic or unexplained digital circuit activity is often due to _________.
53870. The device that would best aid in open track detection is a(n) ________.
53871. A check of all power supply voltages should be made during the ________ method of troubleshooting.
53872. A series of gradually decreasing sine wave oscillations is called:
53873. The determination of a digital signal's frequency and waveshape is best accomplished with which test equipment?
53874. A logic probe is placed on the output of a gate and the display indicator is dim. A logic pulser is used on each of the input terminals, but the output indication does not change. What is wrong?
53875. A +5 V PCB power source that has been "pulled down" to a +3.4 V level may be due to:
53876. Measurement of pulse width should be taken at a 50% mean of the:
53877. A UJT has:
53878. The only way to close an SCR is with:
53879. What is an SCR?
53880. What type of application would use a photovoltaic cell?
53881. A patient with blood group A needs transfusion of blood. If blood group A is not available which of the following blood group can be substituted without causing any damage to the patient?
53882. The smallest amount of current that the cathode-anode can have, and still sustain conduction of an SCR is called the:
53883. Once a DIAC is conducting, the only way to turn it off is with:
53884. When was ‘Indira Gandhi Paryavaran Puraskar’ come to being?
53885. The DIAC is a:
53886. What type of application would use an injection laser diode?
53887. The PUT (programmable unijunction transistor) is actually a type of:
53888. A transducer's function is to:
53889. The optically coupled isolator interrupter module is used to transfer switching information between two electrically isolated points.
53890. A photodiode is a device that produces light.
53891. To turn an SCR off, simply remove the gate voltage.
53892. A thermistor is a semiconductor device that acts like a piezoresistive resistor.
53893. A silicon-controlled rectifier (SCR) has 3 terminals labeled base, collector, and emitter.
53894. The DIAC conducts in only one direction when gated on.
53895. A DIAC is a bidirectional diode that has a symmetrical switching mode.
53896. A transducer does not convert energy from one form to another.
53897. A semiconductor using the hall effect will detect magnetic fields.
53898. The silicon-controlled rectifier (SCR) is a three-layer device consisting of a gate, an anode, and a cathode.
53899. The gate of a TRIAC can turn it on to have current flow in either direction.
53900. SCRs are four-layer devices that are either fully conducting or not conducting.