Description : The pitting of controller contacts can be caused by _____________. A. excessive spring pressure B. insufficient contact pressure C. continuous motor overload D. all of the above
Last Answer : Answer: B
Description : Stress concentration is caused due to A. Variation in properties of material from point to point in a member B. Pitting at points or areas at which loads on a member are applied C. Abrupt change of section D. All of the above
Last Answer : D. All of the above
Description : The main purpose of an electric space heater installed in a large AC generator is to _____________. A. keep the lube oil warm for quick starting B. prevent moisture from condensing in the ... is shutdown C. prevent the windings from becoming brittle D. prevent acidic pitting of the slip rings
Description : If an alternator is to be inactive for a considerable period of time, which of the following actions should be taken? A. It should be disconnected from the prime mover and raised off its bearing supports ... . D. The windings and collector rings should be protected with a thin coat of grease or oil.
Last Answer : Answer: C
Description : In an A.C. generator, pitting of collector rings will cause __________. I. sparking II. Chattering A. I only B. II only C. both I and II D. neither I or II
Last Answer : Answer: D
Description : The main purpose of an electric space heater installed in a large AC generator is to _____________. A. prevent the windings from becoming brittle B. prevent moisture from condensing in the windings during ... C. prevent acidic pitting of the slip rings D. keep the lube oil warm for quick starting
Description : _____ is a surface fatigue failure which occurs when the load on the bearing part exceeds the surface endurance strength of the material. (a) Scoring (b) Pitting (c) Corrosion
Last Answer : (b) Pitting
Description : Extreme Pressure (EP) additives cause ______ wear in the bearing parts. (a) abrasive (b) corrosive (c) pitting (d) fatigue
Last Answer : (b) corrosive
Description : Extreme pressure causes ______ wear in the bearing parts. a) Abrasive b) Corrosive c) Pitting d) All of the mentioned
Last Answer : b) Corrosive
Description : Identify the false statement (A) Martensitic steels are less susceptible to pitting corrosion than austenitic steels (B) Pitting corrosion is usually very localised (C) Hydrogen embrittlement is facilitated by tensile stress (D) Stress corrosion cracking is facilitated by tensile stress
Last Answer : (A) Martensitic steels are less susceptible to pitting corrosion than austenitic steels
Description : Damage to metal surface by mechanical action is called (A) Pitting (B) Corrosion (C) Erosion (D) None of these
Last Answer : Option C
Description : A patient presents with long time history of knee pain suggestive of osteoarthritis. Now he complains of unilateral lower limb swelling and on examination there is +ve pedal & tibial pitting edema ... appropriate investigation? a. CXR b. ECG c. Echocardiography d. Duplex ultrasound of lower limb
Last Answer : d. Duplex ultrasound of lower limb
Description : Which transformation distorts the shape of an object such that the transformed shapeappears as if the object were composed of internal layers that had been caused to slide over each other? a.Rotation b.Scaling up c.Scaling down d.Shearing
Last Answer : d.Shearing
Description : Weight transfer in a tractor in a tractor implement system is caused by 1. Application of pull 2. Tractor force 3. Tractor slip 4. Weight of operator
Last Answer : ans 1
Description : Play in bearings and worn knife head holders caused due to in cutter bar. A) Pitman B) Breaking of knives. C) Knife head. D) Grass board.
Last Answer : Breaking of knives.
Description : Weight transfer in a tractor in a tractor implement system is caused by A. Application of Pull. B. Tractor force C. Tractor slip. D. Weight of operator
Last Answer : Application of Pull
Description : The thresher caused More seed damage if A. Speed is increases B. Clearance is increase C. Feed rate is reduced. D. Speed is reduced
Last Answer : Speed is increases
Description : Pollution caused by cooling tower includes 1. Fouling 2. Limestone formation 3. Corrosion 4. All of above
Last Answer : All of above
Description : It is the unbalanced force developed in a turbo jet engine that is caused by the difference in the momentum of the low-velocity air entering the engine and the high velocity exhaust gases leaving the engine. a. Fall b. Lift c. Drag d. Thrust
Last Answer : Thrust
Description : What refers to the heating of the earth’s atmosphere not caused by direct sunlight but by infrared light radiated by the surface and absorbed mainly by atmospheric carbon dioxide? A. Greenhouse effect B. Global warming C. Thermal rise effect D. Ozone effect
Last Answer : Greenhouse effect