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You Are On Multi Choice Question Bank SET 1338
66901. The source is 24 volts and the load resistance is 100 . What is the load current?
(A): 2.4 A (B): 240 mA (C): 24 mA (D): 2.4 mA
66902. Resistors are identified as to wattage by:
(A): size (B): color code (C): types of materials (D): internal construction
66903. What type of resistors have a tolerance rating of 5% or greater?
(A): precision (B): SIP (C): general-purpose (D): wirewound
66904. Resistor tolerance is either printed on the component, or is provided by:
(A): keyed containers (B): size (C): color code (D): ohmmeter reading
66905. How many connections does a rheostat have?
(A): 1 (B): 2 (C): 3 (D): 4
66906. What are the parts of a rheostat?
(A): wiper and resistor track (B): solenoid and armature (C): contact and wire wound (D): center tape and wiper
66907. The load resistance increases. How will the load current change?
(A): vary (B): remain constant (C): increase (D): decrease
66908. What is the power dissipated by a 1.2 k resistor with 12 volts across it?
(A): 12 W (B): 1.2 W (C): .12 W (D): 12 mW
66909. How many joules of energy will a 10 W lamp dissipate in one minute?
(A): 10 joules (B): 60 joules (C): 600 joules (D): 3600 joules
66910. Which type of test equipment is used to measure resistors?
(A): ohmmeter (B): ammeter (C): voltmeter (D): watt meter
66911. Resistance is:
(A): the opposition to current flow accompanied by the dissipation of heat (B): symbolized by R, measured in ohms, and directly proportional to conductance (C): directly proportional to current and voltage (D): represented by the flow of fluid in the fluid circuit
66912. Electrical equipment is protected against excessive current by a(n):
(A): fusible wire link (B): insulated glass container (C): metal ended coil (D): circuit opener
66913. If resistance decreases, then current will:
(A): decrease (B): increase (C): remain the same (D): double
66914. A wire with a smaller cross-sectional area will produce:
(A): less heat (B): more conductance (C): less resistance (D): more heat
66915. A 22-gauge wire will have a diameter in mils of:
(A): 10.03 (B): 22.35 (C): 45.26 (D): 71.96
66916. The word work means that:
(A): energy has been transferred (B): it is inversely related to energy (C): no energy has been transferred (D): work and energy are not related
66917. A good fuse will have:
(A): zero ohms resistance (B): a medium resistance (C): a high resistance (D): an infinite resistance
66918. What property does an incandescent lamp possess?
(A): cold resistance (B): hot resistance (C): ballast resistance (D): both cold and hot resistance
66919. One advantage of a carbon film resistor over a carbon composition resistor is:
(A): less circuit noise (B): smaller size (C): higher wattage (D): poor tolerance
66920. If a metallic conductor has a positive temperature coefficient of resistance, then:
(A): as temperature increases, resistance decreases (B): as current increases, resistance decreases (C): as voltage increases, current increases (D): as temperature increases, resistance increases
66921. What value of a 1.3 k resistor as measured by a digital voltmeter would be considered within tolerance?
(A): 1234 (B): 1235 (C): 1366 (D): 1367
66922. If a calculator display was "0.00263," what would this answer be in percent?
(A): 0.026% (B): 0.26% (C): 2.63% (D): 26.3%
66923. A 33 k resistor with a 20% tolerance checks out as ok with which of the following ohmmeter readings?
(A): 26400 ohms (B): 24183 ohms (C): 6600 ohms (D): 39970 ohms
66924. For P = V2/R, a decrease in resistance should produce:
(A): a decrease in power (B): an increase in ohms (C): an increase in power (D): a decrease in current
66925. After a lamp is turned on, its filament resistance will change to become:
(A): less resistive (B): cooler (C): brighter (D): more resistive
66926. Wirewound resistors are usually used in circuits that have:
(A): high current (B): negative temperature coefficients (C): low power (D): high voltage
66927. How is power dissipated in a resistor?
(A): by resistance (B): by voltage (C): by current (D): by heat
66928. Resistance in a circuit is:
(A): opposition to current (B): opposition to voltage (C): the same as current (D): the same as voltage
66929. The unit designator for resistance value is the:
(A): ampere (B): ohm (C): volt (D): watt
66930. One ampere of current flowing through one ohm of resistance is equal to:
(A): 1 horsepower (B): 1 Btu (C): 1 watt (D): 1 joule
66931. Good insulators:
(A): have few electrons in their outer shells (B): have a large dielectric strength (C): have a small breakdown voltage (D): have many electrons in the nucleus
66932. A 12-volt battery is delivering 3 amperes to a resistor. The power dissipated by the resistor is 4 watts.
(A): True (B): False
66933. Resistance limits the flow of current.
(A): True (B): False
66934. If 500 mA is flowing through a 10 resistor, the wattage rating of the resistor should be 2 watts.
(A): True (B): False
66935. A digital voltmeter can be used to measure resistance.
(A): True (B): False
66936. Carbon composition resistors are the most common and the least expensive type of fixed-value resistor.
(A): True (B): False
66937. In a resistive circuit, if the voltage increases, the current will increase.
(A): True (B): False
66938. A 2% 55 k resistor would have a color coding of green, green, black, red, red.
(A): True (B): False
66939. The resistive track of a rheostat or potentiometer can be classified as having either a linear or tapered resistance.
(A): True (B): False
66940. Resistance is inversely proportional to current.
(A): True (B): False
66941. A rheostat is not a type of variable resistor.
(A): True (B): False
66942. Resistivity is measured in cmil.Ω/ft.
(A): True (B): False
66943. A load resistance is the resistance of the load.
(A): True (B): False
66944. Variable resistors have problems with the wiper making contact.
(A): True (B): False
66945. The maximum potential a material can withstand without rupture is called breakdown voltage.
(A): True (B): False
66946. The cross-sectional area of a conductor is one factor that determines the conductor's resistance to current.
(A): True (B): False
66947. An ohmmeter uses an internal battery to measure the resistance of a resistor.
(A): True (B): False
66948. A protoboard is used to make experimental circuits.
(A): True (B): False
66949. One horsepower is 746 watts.
(A): True (B): False
66950. Fixed-value resistors can internally short-circuit.
(A): True (B): False
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