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Mechanical Engineering - Steam Boilers and Engines

Exercise : Steam Boilers and Engines - Section 1
21.
The draught produced by a steam jet issuing from a nozzle placed in the ashpit under the fire grate of the furnace is called
induced steam jet draught
chimney draught
forced steam jet draught
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
Which of the following statement is wrong ?
The factor of evaporation for all boilers is always greater than unity.
The amount of water evaporated in kg per kg of fuel burnt is called equivalent evaporation from and at 100° C.
The ratio of heat actually used in producing the steam to the heat liberated in the furnace is called boiler efficiency.
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
The function of a crosshead is to guide motion of the __________ and to prevent it from bending.
piston rod
connecting rod
eccentric rod
valve rod
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
The cylinder dimensions of a compound engine may be designed on the basis of
equal power developed in each cylinder for uniform turning moment
equal initial piston loads on all pistons for obtaining same size of piston rod, connecting rod etc. for all cylinders
equal temperature drop in each cylinder for economy of steam
all of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
The function of a piston rod is
to guide motion of the piston rod and to prevent it from bending
to transfer motion from the piston to the cross head
to convert heat energy of the steam into mechanical work
to exhust steam from the cylinder at proper moment
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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