Related Questions

For circumferential joint in boilers, the type of joint used is
A Butt joint with single cover plate
B Butt joint with double cover plate
C Lap joint with one ring overlapping the other
D Any one of the above
জারণ সংখ্যা সম্পর্কিত কিছু তথ্য হলো- i. HCIO3 যৌগে CI এর জারণ সংখ্যা +5 ii. ICI, IBr যৌগে । এর জারণ সংখ্যা +1 iii. সাধারণ অক্সাইডে ০ এর জারণ সংখ্যা -2 নিচের কোনটি সঠিক?
A i ও ii
B i ও iii
C ii ও iii
D i, ii ও iii
A _________ in a boiler is used to put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit.
A Blow off cock
B Fusible plug
C Stop valve
D Safety valve
A flanged pipe joint will be a leak-proof joint, if the circumferential pitch of the bolts is (where d = Diameter of bolt hole)
A Less than 20d
B Greater than 30d
C Between 20d and 30d
D Equal to inside diameter of pipe
The amount of water evaporated in kg per kg of fuel burnt in a boiler is called the __________ of a boiler.
A Evaporative capacity
B Evaporation efficiency
C Thermal efficiency
D Steam load
Circumferential (hoop) stress in a thin cylindrical vessel under internal pressure is __________ the longitudinal stress.
A Half
B Equal to
C Twice
D Eight times
The longitudinal stress is __________ of the circumferential stress.
A One-half
B Two-third
C Three-fourth
D Double
Which of the following statement indicates the difference between Cornish boiler and Lancashire boiler?
A Cornish boiler is a water tube boiler whereas Lancashire boiler is a fire tube boiler
B Cornish boiler is a fire tube boiler whereas Lancashire boiler is a water tube boiler
C Cornish boiler has one flue tube whereas Lancashire boiler has two flue tubes
D Cornish boiler has two flue tubes whereas Lancashire boiler has one flue tube
For the same diameter and thickness of tube, a water tube boiler has ________ heating surface as compared to fire tube boiler.
A More
B Less
C Equal
D None of these
Steam in water tube boiler as compared to fire tube boiler
A Can be raised rapidly
B Is raised at slower rate
C Is raised at same rate
D Could be raised at fast/slow rate depending on design

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