Description : Pick out the wrong statement. (A) Seam welding, projection welding & spot welding are the classification of electrical resistance welding (B) Electrode tip in spot welding is of copper and the ... joined are overlapped and placed between two electrodes (D) Mild steel sheet cannot be spot welded
Last Answer : (D) Mild steel sheet cannot be spot welded
Description : Filler material is used in electric resistance welding. a) Yes b) No filler material used c) Depends on the type of welding d) None of the listed
Last Answer : b) No filler material used
Description : Consumable electrodes are used in the __________ welding. (A) Gas (B) Arc (C) Thermit (D) Resistance
Last Answer : (B) Arc
Description : Electric resistance seam welding uses __________ electrodes. (A) Pointed (B) Disc. (C) Flat (D) Domed
Last Answer : Ans: B Disc type electrodes are used for electric resistance seam welding.
Description : Electric resistance seam welding uses_______ electrodes.(A) pointed (B) disc (C) flat (D) domed
Last Answer : Electric resistance seam welding uses disc electrodes.
Last Answer : In resistance welding the electrodes used are of Non – Consumable type
Description : TIG welding, thoriated tungsten electrodes are used, because it (A) Has higher current carrying capacity (B) Has better electron emissivity (C) Is stronger than ordinary tungsten (D) Is easy to prepare
Last Answer : Option B
Description : Why it is sometimes necessary to preheat the base material before welding? a) To remove oil and grease b) To remove moisture from inside the material c) To prevent the possible risk of cracking d) Not required if using cellulosic electrodes as these will provide enough heat
Last Answer : c) To prevent the possible risk of cracking
Description : Coating provided on the electrodes used in the arc welding is not expected to (A) Add alloying elements (B) Prevent electrode from contamination (C) Stabilise the arc (D) Provide protective atmosphere to weld
Last Answer : (B) Prevent electrode from contamination
Description : When welding medium carbon steel plates over 100mm in thickness would the basic electrodes require any pre treatment before use? a) None if they were in a vacuum pack opened 8 hours prior to use b) None if ... ) Heat to 500 °C for 2 hours if used outside d) Baked at 150°C for 4hours prior to use
Last Answer : b) None if they were in a sealed vacuum pack prior to use
Description : Which electrodes to choose for a welding inverter?
Last Answer : Despite the seeming difficulty in use, the welding machine has found application not only in production, but also in the household. Of course, owners of private households use it more often ... to purchase electrodes in the construction markets; it is better to contact a specialized store.
Description : The resistance furnace produces heat by the (A) Electric arc struck between electrodes and the charge (B) Flow of current through a heating element (C) Combination of induced current and skin effect (D) None of these
Last Answer : (B) Flow of current through a heating element
Description : The movement of charged particles towards one of the electrodes under the influence of electrical current is (A) Gel filtration (B) Molecular sieving (C) Gas liquid chromatography (D) Electrophoresis
Last Answer : Answer : D
Description : Preheating before welding is done to (A) Make the plate softer (B) Burn oil & grease sticking to plate surfaces (C) Avoid plate distortion (D) Prevent cold cracks
Last Answer : (D) Prevent cold cracks
Description : In order to prevent the winch shown in the illustration from turning while troubleshooting the controller circuit, _________________. EL-0102 A. set the dynamic brake by clamping contact 'DB' closed B. set the ... at 'B1' and 'B2' D. open the test link preventing current flow to the armature
Last Answer : Answer: D
Description : Chromium molybdenum steel cannot be welded using __________ welding. (A) Thermit (B) Electrical resistance (C) Oxy-acetylene (D) Any of these
Description : Larger length & diameter water pipes are made by (A) Electrical resistance welding (B) Die casting (C) Semi-centrifugal casting (D) Continuous casting
Last Answer : options A
Last Answer : Option C
Description : Identify the correct combination of respective Electric arc welding and Electric resistance welding methods : (A) Butt welding and Seam welding (B) Hydrogen shielding and Projection welding (C) Seam welding and Coated electrode welding (D) Coated electrode welding and Hydrogen shielding
Last Answer : Identify the correct combination of respective Electric arc welding and Electric resistance welding methods : (A) Butt welding and Seam welding (B) Hydrogen shielding and Projection welding ... Seam welding and Coated electrode welding (D) Coated electrode welding and Hydrogen shielding
Description : An electric furnace producing heat by means of an electric arc struck between each of three electrodes and the charge is called __________ furnace. (A) Resistance (B) Arc (C) Low frequency induction (D) None of these
Description : Improper storage condition results in the weathering of coal and spontaneous combustion, which increases its (A) Caking index (B) Yield of carbonised products (C) Friability & oxygen content (D) Calorific value
Last Answer : (C) Friability & oxygen content
Description : Coal tar is used as a (A) Binding material for coal briquettes (B) Fuel in rotary kiln (C) Binder in making carbon electrodes (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Material of construction of the electrode used in the electric resistance welding is (A) Stainless steel (B) Graphite (C) Copper (D) Steel
Description : What is a clamping circuit ? What is a clamping circuit ?
Last Answer : A circuit that allows the positive or negative vertices of the input signal to be placed at the desired DC level is called a clamping circuit.
Description : 61 The degree of mechanical vibrations produced by the laminations of a transformers depends on A. Tightness of clamping B. Gauge of laminations C. Size of laminations D. All of the above
Last Answer : D. All of the above
Description : List down various types of clamping devices used in design of Jigs. Explain any one with sketch.
Last Answer : List of Types of clamping devices used in design of jigs. i. Screw clamp ii. Pivoted clamp. iii. Equalizing clamp. iv. Latch clamp. v. Wedge clamp. vi. Hinged jaw clamp. ... to be gripped on its edges as shown in figure. This arrangement ensures easy machining of the work piece
Description : Explain any two clamping devices with neat sketch
Last Answer : [1] Screw clamp:- It is particularly useful when a component is to be gripped on its edges. This arrangement insures easy machining of top surface of work piece. [2] Equalizing clamp: - It ... is operated by simply actuating the handle up or down which locks or unlocks the strap with the work.
Description : Why power devices are used in clamping ? What are the disadvantages in hand clamping?
Last Answer : Reasons for use of power devices are used in clamping are given below: 1. Quick acting and less time: Power driven clamps are preferred as they are quick acting and less time is required ... to the operators: It causes fatigue to the operator if repetitive clamping is required with more efforts.
Description : The function of aggregates in concrete is to serve as (a) Binding material (b) Filler (c) Catalyst (d) All the above
Last Answer : (b) Filler
Description : Compare Brazing and Soldering on the basis of : (i) Temperature Used. (ii) Filler Material. (iii) Joint Strength (iv) Applications.
Last Answer : Comparison of Brazing and Soldering:
Description : Are There Any Common Improper Methods Of Mounting Or Installation?
Last Answer : A couple main ones here. One is contaminating the bearing during installation. The other is applying force on the incorrect ring, as it should only be applied to the press fitted ring.
Description : The improper function of which results in condition ‘Myxedema’ in human beings? -General Knowledge
Last Answer : The answer is 'Thyroid gland '
Last Answer : answer:
Description : Independent auditing can best be described as a. A branch of accounting. b. A regulatory function that prevents the issuance of improper financial information. c. A professional activity that ... . A discipline which attests to the results of accounting and other functional operations and data.
Last Answer : A discipline which attests to the results of accounting and other functional operations and data.
Description : The improper function of which results in condition 'Myxedema' in human beings?
Last Answer : hyroid gland
Last Answer : ropical rainforests
Description : Current employed in resistance welding ranges from __________ kVA/cm2. (A) 1.2 to 2.5 (B) 4.5 to 6.2 (C) 7.5 to 8.5 (D) 10.5 to 15.5
Description : Explain the term crossover distortion. State methods to overcome it.
Last Answer : Explanation:- * Cross over distortion occurs in Class B push pull Amplifier. * In the push-pull configuration, the two identical transistors get into conduction, one after the other and the output ... transistors won t be OFF at the same time. The remedy is to use Class AB amplifier.
Description : In a three-phase electrical system, three ground detecting lamps are provided. If all three lamps REMAIN at half-brilliance when the ground detecting test switch is operated, ______________. A. there is a ... must be replaced C. there are no grounds present D. the light bulbs are of improper voltage
Last Answer : Answer: C
Description : Pick out the correct statement. (A) Stainless steel is nothing but chromium coated steel (B) Hardening of a soft metal can be done by alloying it with another metal or non-metal (C) ... its temporary distortion under the action of applied stress (D) Rusting of iron is not electrochemical in nature
Last Answer : (B) Hardening of a soft metal can be done by alloying it with another metal or non-metal
Description : Circuit breakers are essentially (a) current carrying contacts called electrodes (b) arc extinguishers (c) circuits to break the system (d) transformers to isolate the two systems (e) any of the above
Last Answer : (a) current carrying contacts called electrodes
Description : Thermit welding uses the following energy source. (A) Electrical energy (B) Chemical energy (C) Energy of high velocity electrons (D) Heat generated by friction
Last Answer : (B) Chemical energy
Description : Prior to taking a resistance reading with a volt-ohm-milliammeter, the 'zero' setting must be adjusted. After clipping the two leads together, you find the adjustment knob will not return the pointer ... range setting B. weak batteries C. a faulty zero ohms knob D. a faulty meter movement
Last Answer : Answer: B
Description : Which of the following is not likely to be the cause of failure of antimicrobial therapy of an acute infection: A. Improper selection of drug and dose B. Acquisition of resistance during treatment C. Failure to drain the pus D. Uncontrolled diabetes mellitus
Last Answer : B. Acquisition of resistance during treatment
Description : Benefits of negative feedback include A. less distortion B. increased bandwidth C. low output resistance D. all of above
Last Answer : all of above
Description : ..................... is a type of transmission impairment in which the signal loses strength due to the resistance of the transmission medium. (A) Attenuation (B) Distortion (C) Noise (D) Decibel
Last Answer : (A) Attenuation
Description : Coal based fertiliser plants at Ramagundam (Andhra Pradesh) and Talcher (Orissa) (A) Use coal for heating purpose (B) Gasify coal to get hydrogen from coal gas (C) Use coal as filler in fertiliser (D) Use coal as conditioner in fertiliser
Last Answer : (B) Gasify coal to get hydrogen from coal gas
Description : 5-10-5 fertilisers mean that they contain (A) 5, 10, 5% respectively of N2 , P2O5 and K2O (B) Only 5 to 10% active fertiliser constituents (C) 5 to 10% filler & carrier of soil conditioners (D) None of these
Last Answer : (A) 5, 10, 5% respectively of N2 , P2O5 and K2O
Description : Which of the following paper does not require a filler during manufacture? (A) Bond paper (B) Writing paper (C) Blotting paper (D) Coloured paper
Last Answer : (C) Blotting paper