GATE PI branch:pi PYQs & Answers — Page 55

Questions 541–550 of 650. Imported answers require independent review unless marked reviewed.

Topic practice 650 questionsPage 55 of 65

In an oxy-acetylene gas welding process, oxygen and acetylene are mixed in a ratio of 1.5:1 (by volume). The flame is

Your answerChoose one option.

neutral

carburizing

reducing

oxidizing

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Each of three firms P, Q and R manufactures 100 lakhs components. The number of defective components produced by P, Q and R are 30, 42 and 47, respectively. The firm(s) in conformance with Six Sigma standard is/are

Your answerChoose one option.

only P

P and Q

P, Q and R

Q and R

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To make holes of 0.5 mm diameter and 30 mm depth in a mild steel component, the most suitable process is

Your answerChoose one option.

chemical machining

electrochemical machining

abrasive jet machining

plasma arc machining

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Which one of the following processes is NOT used for producing powders?

Your answerChoose one option.

Atomization

Ball mill

Sintering

Electrolysis

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The process in which molten thermoplastic is forced between rolls to produce thin sheets is called

Your answerChoose one option.

blow moulding

compression molding

calendering

extrusion

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The diagonal elements of a 3-by-3 matrix are −10, 5 and 0, respectively. If two of its eigenvalues are −15 each, the third eigenvalue is ______

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Weights (in kg) of six products are 3, 7, 6, 2, 3 and 4. The median weight (in kg, up to one decimal place) is ______

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The probabilities of occurrence of events F and G are P(F) = 0.3 and P(G) = 0.4, respectively. The probability that both events occur simultaneously is P(F∩G) = 0.2. The probability of occurrence of at least one event P(F∪G) is ______

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A flywheel in the form of a solid circular disc of radius 100 mm and uniform thickness has a mass of 10 kg. If it is rotating at a uniform angular velocity of 20 rad/s, the kinetic energy (in J) of the flywheel is ______

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A cylindrical wooden block of length 50 cm is floating in water in such a way that its axis is vertical. The densities of wood and water are 800 kg/m³ and 1000 kg/m³, respectively. The submerged depth, i.e., depth of immersion (in cm) of the cylinder is ______

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GATE PI branch:pi PYQs

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