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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

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Mechanical Engineering MCQs prepared for job test and interview preparation, especially for fresh graduates, students, and candidates appearing in competitive exams. These multiple-choice questions cover key topics such as Machine Design, Theory of Machines, Hydraulic Machines, and other important mechanical engineering concepts.

All Topics  1919

The basic constituents of Hastelloy are_________________?
A aluminium, copper etc
B nickel, molybdenum etc
C nickel, copper, etc
D all of the above
Correct Answer: nickel, molybdenum etc
Machining properties of steel are improved by adding___________________?
A sulphur, lead, phosphorous
B silicon, aluminium, titanium
C vanadium, aluminium
D chromium, nickel
Correct Answer: sulphur, lead, phosphorous
Depth of hardness of steel is increased by addition of_________________?
A nickel
B chromium
C tungsten
D vanadium
Correct Answer: chromium
In which of the following cases, consideration of creep is important_________________?
A flywheel of steam engine
B cast iron pipes”
C cycle chains
D gas turbine blades
Correct Answer: gas turbine blades
Hardness of steel depends on_________________?
A amount of carbon it contains
B the shape and distribution of the car-bides in iron
C method of fabrication
D contents of alloying elements
Correct Answer: the shape and distribution of the car-bides in iron
Annealing of white cast iron results in production of_________________?
A malleable iron
B nodular iron
C spheroidal iron
D grey iron
Correct Answer: malleable iron
Steel contains____________________?
A 80% or more iron
B 50% or more iron
C alloying elements like chromium, tungsten nickel and copper
D elements like phosphorus, sulphur and silicon in varying quantities
Correct Answer: 50% or more iron
White cast iron contains carbon in the form of__________________?
A free carbon
B graphite
C cementite
D white carbon
Correct Answer: cementite
Chilled cast iron has____________________?
A no graphite
B a very high percentage of graphite
C a low percentage of graphite
D graphite as its basic constituent of composition
Correct Answer: no graphite
Iron is ____________________?
A paramagnetic
B ferromagnetic
C ferroelectric
D dielectric
Correct Answer: ferromagnetic
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