⚙️Mechanical Engineering MCQs
Mechanical Engineering MCQs
488 MCQs381
Fusible plug for boilers is made of fusible metal containing tin, lead, and___________________?
Abismuth
Bcopper
Caluminium
Dnickel E. iron
382
Pick up the wrong statement about water tube boiler in comparison to fire tube boilers ______________________?
Aformer generates steam at high pressure
Bformer occupies less space for same power
Crate of steam flow is more in former case
Dformer is used for high installed capacity E. chances of explosion are less in former case
383
Size of boiler tubes is specified by___________________?
Amean diameter and thickness
Binside diameter and thickness
Coutside diameter and thickness
Doutside diameter and inside diameter E. outside diameter alone
384
Boiler stays are used to___________________?
Aprevent flat surfaces under pressure from tearing apart
Btake care of failure in shear
Ctake care of failure in compression
Dprovide support for boiler E. provide foundation of boiler
385
Which type of boiler can meet rapid changes of load____________________?
Avertical fire tube type
Bhorizontal fire tube type
Chorizontal water tube type
Dvertical water tube type E. forced circulation type
386
It is required to produce large amount of steam at low pressure. Which boiler should be used ?
Apulverised fuel fired boiler
Bcochran boiler
Clancashire boiler
Dbabcock and wilcox boiler E. stoker fired boiler
387
Steam in water tube boiler as compared to fire tube boiler_________________?
Acan be raised rapidly
Bis raisd at slower rate
Cis raised at same rate
Dcould be raised at fast/slow rate depending on design E. none of the above is true
388
In accelerated circulation type boiler________________?
Aheating takes place at bottom and the water supplied at bottom gets converted into the mixture of stdam bubbles and hot water which rise to durm
Bwater is supplied in drum and through downcomers” located in atmospheric conditon it passes to the water wall and rises to durm in the from of mixture of water and steam
Cfeed pump is employed to supplement natural circulation in water wall type furnace E. water is converted into steam in one pass without any recirculation E. water is fed under high pressure and high velocity
389
Expanding steam to a very low pressure (high vacuum) in steam engines is _________________?
Adesirable
Beconomical
Cessential
Doptional E. uneconomical
390
Steam exhaust from high pressure turbine is reheated in _____________________?
Aboiler drum
Bsuperheater tubes
Ceconomiser
Da separate coil E. a separate coil located in convection path