Engineering MCQs

A petrol engine of a car develops 125 N-m torque at 2700 r.p.m. The car is driven in second gear having gear ratio of 1.75. The final drive ratio is 4.11. If the overall transmission efficiency is 90%, then the torque available at the driving wheels is

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8.091 N-m
80.91 N-m
809.1 N-m
8091 N-m
✅ The correct answer is option C.

If a shaft made from ductile material is subjected to combined bending and twisting moment, calculations based on which one of the following failure theories will give the most conservative value?

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Maximum principal stress theory
Maximum shear stress theory
Maximum strain energy theory
Maximum distortion ene
✅ The correct answer is option A.

Work study is mainly aimed at

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determining the most efficient method of performing a job
establishing the minimum time of completion of a job
developing the standard method and standard time of a job
economising the motion
✅ The correct answer is option A.

The mass of flue gas per kg of fuel is the ratio of the

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mass of oxygen in 1 kg of flue gas to the mass of oxygen in 1 kg of fuel
mass of oxygen in 1 kg of fuel to the mass of oxygen in 1 kg of flue gas
mass of carbon in 1 kg of flue gas to the mass of carbon in 1 kg of fuel
mass of carbon in 1 kg
✅ The correct answer is option C.

Which of the following statement is correct as regard to the difference between a machine and a structure?

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The parts of a machine move relative to one another, whereas the members of a structure do not move relative to one another
The links of a machine may transmit both power and motion, whereas the members of a structure transmit forces only
A machine transforms the available energy into some useful work, whereas in a structure no energy is transformed into useful work
all of the above
✅ The correct answer is option D.