921. Fire tube boilers are
A. internally fired
B. externally fired
C. internally as well as externally fired
D. none of these

922. A safety valve usually employed with stationary boilers is
A. lever safety valve
B. dead weight safety valve
C. high steam and low water safety valve
D. all of these

923. One kg of carbon monoxide requires __________ kg of oxygen to produce 11/7 kg of carbon dioxide gas.
A. All
B. 4/7
C. 11/4
D. 9/7

924. The absolute zero temperature is taken as
A. -273°C
B. 273°C
C. 237°F
D. -237°F

925. The specific heat of water is
A. 1.817
B. 2512
C. 4.187
D. none of these

926. The draught produced by a steam jet issuing from a nozzle placed in the ashpit under the fire grate of the furnace is called
A. induced steam jet draught
B. chimney draught
C. forced steam jet draught
D. none of these

927. The function of a crosshead is to guide motion of the __________ and to prevent it from bending.
A. piston rod
B. connecting rod
C. eccentric rod
D. valve rod

928. The cylinder dimensions of a compound engine may be designed on the basis of
A. equal power developed in each cylinder for uniform turning moment
B. equal initial piston loads on all pistons for obtaining same size of piston rod, connecting rod etc. for all cylinders
C. equal temperature drop in each cylinder for economy of steam
D. all of the above

929. The function of a piston rod is
A. to guide motion of the piston rod and to prevent it from bending
B. to transfer motion from the piston to the cross head
C. to convert heat energy of the steam into mechanical work
D. to exhust steam from the cylinder at proper moment

930. Stirling and Ericsson cycles are
A. reversible cycles
B. irreversible cycles
C. semi-reversible cycles
D. quasi-static cycles

NOTE
IF YOU THINK ANY OF THE MCQ ABOVE IS WRONG.
PLEASE COMMENT WITH CORRECT ANSWER AND ITS DETAIL EXPLANATION IN COMMENT BOX.
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