Category: Mechanical Engineering

Latest multiple choice questions with answers for mechanical engineering students.

Mechanical Engineering MCQs [Quiz 30]

Q1. Water and sediment in fuel oil can be removed by
(a) heating the oil in the settling tanks
(b) cooling the oil in the settling tanks
(c) burning the oil
(d) suspension
(e) filtering.

Q2. Pour point of fuel oil is the
(a) lowest temperature at which oil will flow under set condition
(b) storage temperature
(c) temperature at which fuel is pumped through burners
(d) temperature at which oil is transported
(e) none of the above.

Q3. Secondary air is the used to
(a) provide air around burners for obtaining optimum combustion
(b) transport and dry the coal
(c) convert CO (formed in lower zone of furnace) into C02 at higher zone
(d) air delivered by induced draft fan
(e) air fed to pulverisers.

Q4. The behaviour of coal in a furnace is determained by
(a) the content of sulphur
(b) the content of ash and heating value
(c) the proximate analysis
(d) the exact analysis
(e) its type.

Q5. Pick up wrong statement about desired properties of a good fuel
(a) high calorific value
(b) produce minimum smoke and gases
(c) ease in storing
(d) high ignition point
(e) economical

Q6. Sulphur in coal results in
(a) causing clinkering and slagging
(b) corroding air heaters
(c) spontaneous combustion during coal storage
(d) facilitating ash precipitation
(e) all of the above.

Q7. Caking coals are those which
(a) form lumps or masses of coke
(b) burn freely
(c) show little or no fusing action
(d) burn completely
(e) do not form ash.

Q8. Green coal, in order to be burnt, must be
(a) heated sufficiently
(b) burnt in excess air
(c) heated to its ignition point
(d) burnt as powder
(e) burnt as lumps.

Q9. The ultimate analysis of fuel lists
(a) various chemical constituents, carbon, hydrogen, oxygen etc, plus ash as per-cents by volume
(b) various chemical constituents, carbon, hydrogen, oxygen, etc, plus ash as per-cents by weight
(c) fuel constituents as percents by volume of moisture, volatile, fixed carbon and ash
(d) fuel constituents as percents by weight of moisture, volatile, fixed carbon and ash
(e) moisture and ash free heating value.

Q10. The proximate analysis of fuel lists
(a) various chemical constituents, carbon, hydrogen, oxygen etc, plus ash as per-cents by volume
(b) various chemical constituents, carbon, hydrogen, oxygen, etc, plus ash as per-cents by weight
(c) fuel constituents as percents by volume of moisture, volatile, fixed carbon and ash
(d) fuel constituents as percents by weight of moisture, volatile, fixed carbon and ash
(e) moisture and ash free heating value.

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