Description : When the current flow through a copper wire increases, its _____________. A. resistance will decrease B. insulation will burn C. temperature will increase D. conductivity will increase
Last Answer : Answer: C
Description : Large cable sizes are formed as individual conductors that may be comprised of several smaller strands to __________. A. obtain the flexibility required for easy handling B. reduce the overall weight of the ... . reduce the number of supports needed for a horizontal overhead run D. all of the above
Last Answer : Answer: A
Description : A transformer in an electric circuit serves to ____________. A. generate its own electrical power B. transform electrical energy into mechanical energy C. increase or decrease circuit voltage as required D. convert AC current to DC current
Description : In Beizer Curve, the flexibility of the shape would increase with _______ of the polygon. a.decrease in the number of vertices b.increase in the number of vertices c.decrease in control points d.none of the above
Last Answer : b.increase in the number of vertices
Description : In Beizer Curve, the flexibility of the shape would increase with a.decrease in the number of vertices b.increase in the number of vertices c.decrease in control points d.none of the above
Description : What are the advantages of stranded cables?
Last Answer : a. It gives flexibility. b. It prevents skin effect. c. Increases current carrying capacity. d. It provides easy in soldering joint. e. If one strand breaks the other will carry the load current.
Description : Increasing the load to the secondary windings of a transformer will cause a/an ____________. A. decrease in the primary voltage B. increase in the primary voltage C. decrease in the primary current D. increase in the primary current
Last Answer : Answer: D
Description : The purpose of a heat sink, as frequently used with transistors, is to ____________. A. prevent excessive temperature rise B. compensate for excessive doping C. increase the reverse current D. decrease the forward current
Description : The ability of a carrier to move goods over a specific route or network is the measure of its A)accessibility. B)dependability. C)reliability. D)capability. E)load flexibility.
Last Answer : A)accessibility.
Description : What is the function of a fuse wire? (a) To prevent an unduly high electric current from passing through a circuit (b) To increase the current supply (c) To decrease the current supply (d) To stabilise the voltage
Last Answer : Ans:(a)
Description : Wire in general, when used aboard vessels must meet minimum requirements. Which of the following statements is/are correct? A. Each wire must be 14 AWG or larger, regardless of locations and use. B. ... enclosure or cover is the ground wire used with portable tools and lights. D. All of the above.
Last Answer : Answer: B
Description : Which of the listed conditions describes the effect on intrinsic semiconductor operation as a result of a temperature increase? A. Additional heat sinks will be required B. Conductivity will increase C. Conductivity will decrease D. Resistivity will increase
Description : Tightly knit metal braid wire can be used with a printed circuit board when ___________. A. conductor flexibility is required B. desoldering components in the circuit C. electrically produced magnetic ... cause inaccuracies in adjacent components D. reactance in the circuit must be kept to a minimum
Description : A company is in the ____________ stage of the new product development process when the company develops the product concept into a physical product in order to assure that the product in order ... development 2. commercialization 3. marketing strategy 4. business analysis 5. none of these
Last Answer : product development
Description : The magnetic field produced by a long straight wire carrying a current points: w) in the direction of the current x) toward the wire y) away from the wire z) circles around the wire
Last Answer : ANSWER: Z -- CIRCLES AROUND THE WIRE
Description : What precaution should be taken with a vessel's impressed current cathodic protection system after a drydocking period during which the hull has been painted? A. Output currents should be carefully monitored ... slight (10-15%) overcurrent to the anodes should be allowed in order to speed drying.
Description : If the contacts of a motor starter or controller fail to drop out when the 'stop' button is depressed the ____________. A. contacts are carrying excessive current B. contacts have become welded together C. shading coil is broken D. shading coil is loose
Description : Calculate the electric field in a copper wire of cross-sectional area `2.0 mm^(2)` carrying a current of 1 A. The resistivity of copper `=1.7xx10^(-8)
Last Answer : Calculate the electric field in a copper wire of cross-sectional area `2.0 mm^(2)` carrying a current ... of copper `=1.7xx10^(-8) Omega`m.
Description : OFCC, stranded, and ribbon cables have different fiber worst bend performance?
Last Answer : Ribbon.
Description : Pick out the wrong statement. (A) Lead can creep under its own weight at room temperature (B) The electrical conductivity of gold is considerably reduced by alloying additions due to ... metal (D) With increase in temperature, the electrical conductivity of intrinsic semi-conductor will increase
Last Answer : (C) Recrystallisation temperature decreases with decrease in strain in a cold worked metal
Description : Component 'D' in section 'I' shown in the illustration represents a ____________. EL-0093 A. selector switch B. vibrating reed indicator C. junction box D. ring counter
Description : Figure 'B' shown in the illustration represents a/an ____________. EL-0067 A. silicon controlled rectifier B. junction field effect transistor C. diac thyristor D. IG MOS field effect transistor
Description : Figure 'A' of the diagram shown in the illustration represents a/an ____________. EL-0078 A. silicon controlled rectifier B. IG or MOS field effect transistor C. triac thyristor D. junction field effect transistor
Description : Figure 'B' of the diagram shown in the illustration represents a/an ____________. EL-0065 A. silicon controlled rectifier B. junction field effect transistor C. diac thyristor D. IG or MOS field effect transistor
Description : Which wire can carry a higher current stranded wire or solid wire?
Last Answer : From the formula R=PL/A resistance rise with the fall of surface area ,inverse proportion relation between Resistance and Area ,so stranded wire has more area that a solid wire so more area less resistance. Less resistance/less electron flow opposition,more electron flow (current)
Description : The resistance of electric wire will decrease as its _______________. A. length increases B. cross-sectional area increases C. temperature increases D. percent of metallic purities increases
Description : Which of the following cables will have the highest launch power capability? ∙ A. 50/125/0.2 ∙ B. 85/125/0.275 ∙ C. 62.5/125/0.275 ∙ D. 100/140/0.3
Last Answer : A. 50/125/0.2
Description : The main limitation for power handling capability of short length transmission lines and cables is (A) power factor (B) stability (C) thermal effect limit (D) conductor size
Last Answer : The main limitation for power handling capability of short length transmission lines and cables is thermal effect limit
Description : To increase the frequency of an operating AC generator, you should ____________. A. increase the field excitation B. decrease the field excitation C. increase the number of magnetic poles D. increase the speed of the prime mover
Description : Why do you itch enamel for composite restorations: A. To increase surface area B. To decrease surface area C. Does not really change the surface area D. Increase the chemical bonding capability E. Decrease the chemical bonding capability
Last Answer : A. To increase surface area
Description : When using a megohmmeter to test the dielectric strength of wire insulation, a continuous series of slight downscale kicks by the pointer is result of ____________. A. good insulation B. the ... dirty insulation C. the capacitance of the windings D. the dielectric-absorption effect of the insulation
Description : A direct current passing through a wire coiled around a soft iron core is the description of a simple ____________. A. magnetic shield B. electromagnet C. piezoelectric device D. electromagnetic domain
Description : What is an element that has properties such as shine conductivity and flexibility is an?
Last Answer : What is the answer ?
Description : Reciprocal of resistivity is called a. Resistance b. Inductance c. Conductivity d. Flexibility
Last Answer : c. Conductivity
Description : Which of the following actions can be carried out in order to prevent thermal runaway in a transistor? A. Increase the current through the collector-base junction. B. Install a heat sink. ... point to increase collector current. D. Increase the potential difference between the emitter and the base.
Description : The size of a conductor used in power cables depends on the (A) operating voltage. (B) power factor. (C) current to be carried. (D) type of insulation used.
Last Answer : (C) current to be carried.
Description : The current carrying capacity of cables in D.C. is more that in A.C. mainly due to (a) absence of harmonics (b) non-existence of any stability limit (c) smaller dielectric loss (d) absence of ripples (e) none of the above
Last Answer : (c) smaller dielectric loss
Description : The thickness of the layer of insulation on the conductor, in cables, depends upon (a) Reactive power (b) Power factor (c) Voltage (d) Current carrying capacity
Last Answer : (c) Voltage
Description : Which of the following is the demerit of a 'constant voltage transmission system' ? (a) Increase of short-circuit current of the system (b) Availability of steady voltage at all loads at ... of carrying increased power for a given conductor size in case of long-distance heavy power transmission
Last Answer : (a) Increase of short-circuit current of the system
Description : Does being thick increase or decrease the current carrying capacity ?
Last Answer : : The thicker it is, the greater the current carrying capacity.
Description : Periodic testing of circuit breakers is necessary to assure that a correctly rated and properly installed unit _________________. A. can trip faster as it increases in age B. will continue to provide ... not exceed its interrupting capacity D. be able to withstand at least 125% of applied voltage
Description : A wattmeter is used to determine ____________. A. the power being consumed by electrical equipment B. partial circuit resistance C. current flowing in a circuit D. voltage existing between two points in a circuit
Description : An ohmmeter can be used to measure ____________. A. current flow in a circuit B. voltage between two points in a circuit C. circuit continuity D. power
Description : In the event of a power failure during cargo loading operations, the movement of an electric powered cargo winch will be stopped by ____________. A. a manual override switch B. the weight of the load on the boom C. a spring set brake D. a hand operated band brake
Description : Transition curves are introduced at either end of a circular curve, to obtain (A) Gradually decrease of curvature from zero at the tangent point to the specified quantity at the junction of the ... specified amount at the junction of the transition curve with main curve (D) None of these
Last Answer : (B) Gradual increase of super-elevation from zero at the tangent point to the specified amount at the junction of the transition curve with main curve
Description : An electric current I enters and leaves a uniform circular wire of radius a through diametrically opposite points. A charged paricle q moving along th
Last Answer : An electric current I enters and leaves a uniform circular wire of radius a through diametrically opposite points. A ... `qv(mu_(0)i)/(a)` D. zero
Description : Moisture accumulating in electric motors and generator windings having a cold insulation resistance greater than 50,000 ohms may be baked out with internal heat. This heat can be developed by ____________. ... an electric welder and feeding it into the armature while running the motor at full speed
Description : ____________ protocols provide end to end message transfer capability independent of the underlying network. A. Network layer B. Transport layer C. Application layer D. Link layer
Last Answer : B. Transport layer
Description : With increase in porosity, the thermal conductivity of a solid substance (A) Increases (B) Decreases (C) Remains unchanged (D) May increase or decrease; depends on the solid
Last Answer : (B) Decreases