Tag: science & technology

Questions Related to science & technology

After the death of Albert Einstein his brain was removed by a pathologist and put in a jar for future study.
general knowledge science & technology

  1. True

  2. False

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Correct Option: A

Feed in a lathe is expressed in
general knowledge science & technology

  1. mm per revolution

  2. mm per degree

  3. mm

  4. rpm

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Correct Option: A
Explanation:

To solve this question, the user needs to know about the basic terminologies and operations of a lathe machine.

The feed rate in a lathe machine refers to the distance that a cutting tool advances into the workpiece with each revolution of the lathe spindle. It is typically expressed in millimeters per revolution (mm/rev).

Option A is correct because feed rate is generally given in millimeters per revolution (mm/rev). This means that for every complete revolution of the lathe spindle, the cutting tool advances a certain distance along the workpiece.

Option B is incorrect because the feed rate is not typically given in millimeters per degree. Degrees are used to measure angles, not distances.

Option C is incorrect because simply giving the distance in millimeters does not take into account the number of revolutions of the lathe spindle that are required to move the cutting tool that distance.

Option D is incorrect because RPM (revolutions per minute) is a measurement of the speed of the lathe spindle, not the feed rate.

Therefore, the correct answer is:

The Answer is: A. mm per revolution

Rapping allowance is provided on a pattern to take care of
general knowledge science & technology

  1. shrinkage

  2. distortion

  3. machining

  4. easy withdrawl

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Correct Option: D

Upsetting is the term used in one of the following operations

general knowledge science & technology

  1. casting

  2. turning

  3. drilling

  4. forging

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Correct Option: D

AI Explanation

To answer this question, we need to understand the term "upsetting" in the context of operations.

Option A) Casting - Casting is a process where molten metal is poured into a mold to create a desired shape. Upsetting is not typically associated with casting.

Option B) Turning - Turning is a machining process where a cutting tool is used to remove material from a rotating workpiece. Upsetting is not typically associated with turning.

Option C) Drilling - Drilling is a process of creating a hole in a workpiece using a rotating cutting tool. Upsetting is not typically associated with drilling.

Option D) Forging - Forging is a manufacturing process where a metal is heated and shaped by applying compressive forces. Upsetting is a term used in forging to describe the process of increasing the diameter of a workpiece by compressing it between dies.

Therefore, the correct answer is D) Forging. Upsetting is the term used in the forging operation.

Reducing flame is obtained in oxyactetylane welding with
general knowledge science & technology

  1. excess oxygen

  2. equal parts of both gases

  3. excess of acetylene

  4. reduced acetylene

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Correct Option: C

Brasses and bronzes are welded using
general knowledge science & technology

  1. neutral flame

  2. oxidizing flames

  3. carburising flame

  4. reducing flame

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Correct Option: A

One of the materials used for making surface plate is
general knowledge science & technology

  1. granite

  2. brass

  3. stainless steel

  4. wood

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Correct Option: A

In a process chart the inverted triangle symbol indicates
general knowledge science & technology

  1. an operation

  2. inspection

  3. storage

  4. transport

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Correct Option: C

One of the following function is not performed by coating on the welding electrodes
general knowledge science & technology

  1. increase the cooling rate

  2. provide protective atmosphere

  3. refuce oxidation

  4. stabilize the arc

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Correct Option: A

Feeler gauges are used for measuring the
general knowledge science & technology

  1. thickness of plates

  2. clearances between mating parts

  3. pitch of screw threads

  4. radius of curvature

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Correct Option: B