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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

Fusible plug for boilers is made of fusible metal containing tin, lead, and___________________?
A bismuth
B copper
C aluminium
D nickel
Correct Answer: bismuth
A fusible plug is fitted in small boilers in order to ___________________?
A avoid excessive build up of pressure
B avoid explosion
C extinguish fire if water level in the boiler falls below alarming limit
D control steam dome
Correct Answer: extinguish fire if water level in the boiler falls below alarming limit
Boiler H.P. is defined as the ________________ ?
A steam evaporation rate per kg of fuel fired
B work done in evaporating 1 kg of steam per hour from and at 100°C into dry saturated steam
C the evaporation of 15.65 kg of water per hour from and at 100°C into dry saturated steam
D work done by 1 kg of steam at saturation condition
Correct Answer: the evaporation of 15.65 kg of water per hour from and at 100°C into dry saturated steam
The fusible plug in small boilers is located ________________?
A in the drum
B in the fire tubes
C above steam dome
D over the combustion chamber
Correct Answer: over the combustion chamber
The number of drums in Benson steam generator is_________________?
A one
B two
C one steam drum and one water drum
D no drum
Correct Answer: no drum
If a steam sample is nearly in dry condition, then its dryness fraction can be most accurately determined by___________________?
A throttling calorimeter
B separating calorimeter
C combined separating and throttling calorimeter
D bucket calorimeter
Correct Answer: throttling calorimeter
The difference between cornish boiler and lancashire boiler is that_________________?
A former is fire tube type and latter is water tube type boiler
B former is water tube type and latter is fire tube type
C former contains one fire tube and latter contains two fire tubes
D
Correct Answer: former contains one fire tube and latter contains two fire tubes
On Mollier chart, flow through turbine is represented by ________________?
A horizontal straight line
B vertical straight line
C straight inclined line
D curved line
Correct Answer: vertical straight line
On Millier chart, the constant pressure lines_________________?
A diverge from left to right
B diverge from right to left
C are equally spaced throughout
D first rise up and then fall
Correct Answer: diverge from left to right
The bituminous coal is non-caking if its carbon content is_______________?
A 78-81%
B 81-85%
C 85-90%
D 90-95%
Correct Answer: 78-81%
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