A fire tube boiler is limited to a maximum steam pressure of about ______________ kg/cm2 ?
A fire tube boiler is limited to a maximum steam pressure of about ______________ kg/cm2 ?
A. 6
B. 18
C. 38
D. 52
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Which of the following metals is not subjected to electrolytic refining/purification ?
Which of the following metals is not subjected to electrolytic refining/purification ?A. Copper
B. Zinc
C. Tin
D. AluminiumFiller material used in welding should have __________ as compared to the parent metal to be welded.
Question: Filler material used in welding should have __________ as compared to the parent metal to be welded.
[A].lower melting temperature [B].
same melting temperature [C].
same composition [D].
both ‘b’ & ‘c’ Answer: Option D
Explanation:
No answer description available for this question.
Floating control action
Question: Floating control action
[A].moves the final control element at constant speed in either direction in response to an error signal. [B].
changes the position of the final control element from on to off. [C].
is used to counteract rapid load changes. [D].
none of these. Answer: Option A
Explanation:
No answer description available for this question.
Use of flux during soldering is done to__________________?
Use of flux during soldering is done to__________________?A. Increase fluidity of solder by lowering its melting temperature
B. Prevent oxide formation
C. Wash away surplus solder
D. Full up the joint gapWhich one can be directly solidified from gaseous state without entering into liquid state ?
Which one can be directly solidified from gaseous state without entering into liquid state ?A. Helium
B. Oxygen
C. Carbon dioxide
D. None of theseWith increase in compression ratio, the volumetric efficiency of air compressor____________________?
With increase in compression ratio, the volumetric efficiency of air compressor____________________?A. Increases
B. Decreases
C. Remain same
D. May increase or decrease (depends on the suction pressure)