Description : Which of the following statements best describes the material known as varnished cambric? A. Felted asbestos sealed with varnish. B. Cotton cloth coated with insulating varnish. C. Rubber ... Paper impregnated with mineral oil, specially wrapped with nonmetallic tape, and coated with varnish.
Last Answer : Answer: B
Description : PVC stands for (a) polyvinyl chloride (b) post varnish conductor (c) pressed and varnished cloth (d) positive voltage conductor (e) none of the above
Last Answer : (a) polyvinyl chloride
Description : Which of the following insulation is used in cables? (a) Varnished cambric (b) Rubber (c) Paper (d) Any of the above
Last Answer : (d) Any of the above
Description : Which of the following is a good conductor of heat but a bad conductor of electricity? (1) Celluloid (2) Rubber (3) Asbestos (4) Mica
Last Answer : (4) Mica Explanation: Good conductors of heat are good conductors of electricity. Mica is an exception which although being a good conductor of heat and a bad conductor of electricity. It is commonly ... to assist in the transfer of the generated heat to the heat sink or chassis for dissipation.
Description : Which of the following is a good conductor of heat but a bad conductor of electricity ? (1) Celluloid (2) Rubber (3) Asbestos (4) Mica
Last Answer : Mica
Description : When a megohmmeter is used to test insulation, the gradual rise of the pointer reading as a result of continued cranking, is caused by _____________. A. good conductor resistance B. the ... insulation C. the inductive reactance of the windings D. the dielectric-absorption effect of the insulation
Last Answer : Answer: D
Description : Empire tape is (a) varnished cambric (b) vulcanized rubber (c) impregnated paper (d) none of the above
Last Answer : (a) varnished cambric
Description : Part of the insulation of practically all electrical machinery is in the form of organic compounds which contain some amount of ______________. A. asbestos B. water C. fibre D. plastic
Description : Unnecessary and frequent applications of varnish to the generator windings to repair defective insulation will result in ____________. A. heavy coatings of varnish interfering with heat dissipation B. ... of the rectifier assembly D. a built-up of varnish without changing generator operation
Last Answer : Answer: A
Description : Grounds occurring in electrical machinery as a result of insulation failure may result from _____________. A. deterioration through extended use B. excessive heat C. extended periods of vibration D. all of the above
Description : When changing fuses and the spring clips are found to have lost their grip, they should be replaced or _____________. A. tightened firmly with insulated pliers B. clip clamps should be used C. wired closed with uninsulated, varnished copper wire D. carefully bent back to their original shapes
Description : Which of the following is a good conductor of heat but bad conductor of electricity? (1) mica (2) asbestos (3) celluloid (4) paraffin wax
Last Answer : (1) mica Explanation: Mica is a good conductor of heat but bad conductor of electricity.
Description : Which of the following is a good conductor of heat but bad conductor of electricity ? (1) mica (2) asbestos (3) celluloid (4) paraffin wax
Last Answer : mica
Description : Woollen cloth protects the body from cold because – (1) it is a good conductor of heat (2) it is a poor conductor of heat (3) external heat rays enter into the body through the woollen cloth (4) it reflects heat
Last Answer : (2) it is a poor conductor of heat Explanation: It is just because woolen clothes have fibres and between those fibres air is trapped which reduces heat loss. It reduces heat loss because it is an insulator or poor conductor of heat.
Description : Woollen cloth protects the body from cold because (1) it is a good conductor of heat (2) it is a poor conductor of heat (3) external heat rays enter into the body through the woollen cloth (4) it reflects heat
Last Answer : it is a poor conductor of heat
Description : Line losses in a distribution circuit are kept to a minimum by __________. A. adding rubber insulation conductors to the circuit B. using higher current and lower voltage C. increasing the number of thermal relays in the circuit D. using higher voltage and lower current
Description : The existing resistance of a conductor is dependent upon its length, cross-sectional area, _____________. A. temperature and insulation B. material and insulation C. resistive coefficient and material D. material and temperature
Description : Which of the listed statements is correct when using an analog multimeter as an ohmmeter? A. The pointer should be adjusted to zero each time a new resistance range is selected. B. The ... C. Ohmmeters are not sufficiently sized to measure conductor insulation resistance. D. All of the above.
Description : Copper is often used as an electrical conductor because it _______________. A. has high resistance at low temperatures B. has a highly polished surface C. is able to pass current with little opposition D. holds insulation together well
Last Answer : Answer: C
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 : Where can I find some quality asbestos insulation?
Last Answer : Asbestos products are banned in the U. S.
Description : Is there really asbestos in insulation?
Last Answer : Currently it is illegal to add insulation to a home with more than a very small percentage of asbestos. Exposure to these small quantities of asbestos typically do not cause harm and are ... insulation that needs to be removed as these older forms of insulation do present certain health risks.
Description : How to Know If Your Home Has Asbestos Insulation?
Last Answer : Asbestos is now banned in most new products in the United States. Though it's excellent as an insulation material, disturbing asbestos fiber is hazardous and may lead to damage to the lungs which ... into the air, the homeowner will need to have it removed by an asbestos abatement professional.
Description : State the reasons that the Navy is getting away from the use of asbestos insulation.
Last Answer : Breathing asbestos fibers can cause lung disease and/or cancer
Description : Metalloids (A) Are good conductor of heat & electricity (B) Act as electron donors with metals & as electron acceptor with non metals (C) Are not necessarily solids at room temperature ... & non-metallic properties to some extent and are exemplified by elements like germanium, silicon & boron
Last Answer : D) Are compounds that exhibit both metallic & non-metallic properties to some extent and are exemplified by elements like germanium, silicon & boron
Description : Accidental grounds in a shipboard electrical system must be repaired as soon as possible as they will ____________. A. result in immediate power outages B. damage circuit breakers C. appear on the ground detection system D. damage insulation and may cause outages
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 : Indicate the three types oftransmissionline energylosses. a. I2R, R , and temperature b. Radiation, I2R, and dielectric heating c. Dielectric separation, insulation breakdown, and radiation d. Conductor heating, dielectric heating, and radiation resistance.
Last Answer : b. Radiation, I2R, and dielectric heating
Description : Why did industrialists in India begin shifting from yarn to cloth production? -SST 10th
Last Answer : Industrialists in India begin shifting from yarn to cloth production because of the following ways: . When Indian businessmen began setting up industries; they avoided competing with Manchester goods ... production. . Cotton piece goods production in India almost doubled between 1900 and 1912.
Description : Why did Indian industrialists begin to shift from yarn to cloth production ? -SST 10th
Last Answer : Indian industrialists began to shift from yarn to cloth production for the following reasons: (i) The Swadeshi Movement mobilised people to boycott foreign cloth. This encouraged Indian ... local industrialists in the colonies to capture the home market, and consolidate their position.
Description : Ball mills and tube mills with flint or porcelain balls are used for size reduction of (A) Asbestos (B) Rubber (C) Non-metallic ores (D) Limestone
Last Answer : (C) Non-metallic ores
Description : Which of the following is not a dielectric material? (A) Cotton, silk and paper (B) Asbestos, glass, porcelain and mica (C) Rubber and polymeric resins (D) All refractory materials
Last Answer : Option C
Description : Pick out the correct statement. (A) Noise from ball mills can be dealt with by fibre glass lined enclosures (B) Noise from vibrating chutes can be reduced by lining the metallic chute with rubber (C) Noise ... cloth conveyor belts and rubber/plastic covered metallic rollers (D) All (A), (B) & (C)
Last Answer : (D) All (A), (B) & (C)
Description : Does home heating oil settle, fractionate, or deteriorate if it sits in the tanks for years?
Last Answer : No, but there could be some rust from condensation (as well as condensation) sitting at the bottom of the tank. If in doubt, install an in-line oil filter. (A primary fuel filter for a Diesel engine is cotton wound to absorb water.)
Description : Why is it that regions of the country grow ever more red as their economies deteriorate?
Last Answer : When life is hard, one wishes they had more power to control it. A conservative perspective seems to provide more structure and a more traditional perspective. Though it increases the role of government ... society. When life is relatively easy, however, most are not interested in what others do.
Description : What happens to a person who receives the wrong type of blood? (1) All the arteries constrict (2) All the arteries dialates (3) The RBCs agglutinate (4) The spleen and lymphnodes deteriorate
Last Answer : (3) The RBCs agglutinate Explanation: Red blood cell agglutination indicates clumping of RBC's due to cold agglutinins which are most commonly IgM antibodies. These antibodies cross-link red ... tination is when the particles involved are red blood cells. The agglutin is called hemagglutinin..
Description : What happens to a person who receives the wrong type of blood? A. All the arteries constrict B. All the arteries dialates C. The RBCs agglutinate (Answer) D. The spleen and lymphnodes deteriorate
Last Answer : C. The RBCs agglutinate (Answer)
Description : Identify, from among the following, the correct statement. a) One of the main challenges Engineering facing today is the requirement of most systems to work with a multitude of homogenous systems ... of component based assembly, we find that onlyless than 20% of today's is still custom built
Last Answer : c) does not wear-out in the traditional sense of the term, but does tend to deteriorate as it evolves
Description : On decreasing the grain size of a polycrystalline material, the property most likely to deteriorate is (A) Creep (B) Toughness (C) Tensile strength (D) Fatigue
Last Answer : (B) Toughnes
Last Answer : The RBCs agglutinate
Description : Is there a way of fixing or touching up damage to varnished wooden surfaces?
Last Answer : Depends on the mark. While I am not well versed on different finishes my Father restores antiques and passed the following on to me: If it is white and cloudy then you can take regular fireplace ... refloat the finish I would advise some restoring finish like Howards which is the easiest way to go.
Description : How do you "tone down" the shine on a piece of varnished furniture?
Last Answer : Very, and I’ll say it again very fine steel wool. And a very, repeat after me, a very light touch. Repeat as necessary… To get the desired look.
Description : Can I paint varnished pine furniture white?
Last Answer : No you cannot paint over a varnish. it does not work well and the paint will not likely stick. A varnish is a kind of paint anyways and protects the furniture too.
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 : Electrical leads and insulation on a motor should be painted with ____________. A. heat-resisting acrylic B. heat-resisting aluminum C. insulating varnish D. insulating white lead
Description : The energy consumed by an AC motor, as strictly reactive power, is _____________. A. used to do mechanical work B. used to establish the magnetic field of the motor C. lost as heat generated by the windings D. lost in doing work to turn the motor itself
Description : The reactive power drawn by a motor from an AC generator is the power which is _____________. A. used to establish the magnetic field of the motor B. lost in overcoming friction in the ... by current flow through the windings D. transmitted directly through the rotor shaft to perform useful work
Description : External shunts are sometimes used with ammeters to _______. A. increase meter sensitivity B. permit shunts with larger resistances to be utilized C. prevent damage to the meter movement from heat generated by the shunt D. enable the construction of a compact meter with a virtually unlimited range
Description : The material commonly used for insulation in high voltage cables is (a) lead (b) paper (c) rubber (d) none of the above
Last Answer : (b) paper