A. infinitely long
B. around 200 meters
C. equal to the height of the hot gas column producing draught
D. outside temperature is very low
E. more than the tallest building nearby
Related Mcqs:
- The height of chimney in a power plant is governed by__________________?
A. the draft to be created
B. limitation of construction facilities
C. control of pollution
D. quantity of flue gases to be handled
E. all of the above - Gardually increasing temperature of flue gases at inlet to chimney for given steam outputs is an indication of__________________?
A. higher effectiveness of boiler
B. high calorific value coal being burnt
C. fouling of heat transfer surfaces
D. raising of steam temperature
E. leakage of air - Maximum energy loss in a boiler occurs due to _______________________?
A. unburnt carbon in ash
B. incomplete combustion
C. ash content
D. flue gases
E. radiation losses - The elastic stress strain behaviour of rubber is_____________________?
A. linear
B. non-linear
C. plastic
D. no fixed relationship
E. unpredictable behaviour - The upper surface of a weir over which water flows is known is_____________________?
A. crest
B. nappe
C. sill
D. weir top
E. contracta - Film boling occurs at _______________________?
A. very low pressure
B. atmospheric pressures
C. medium pressures
D. very high pressures
E. none of the above - If mercury in a barometer is replaced by water, the height of 3.75 cm of mercury will be following cm of water________________?
A. 51 cm
B. 50 cm
C. 52 cm
D. 52.2 cm
E. 51.7 cm - Metacentric height is the distance between the metacentre and_______________?
A. water surface
B. center of pressure
C. center of gravity
D. center of buoyancy
E. none of the above - The time oscillation of a floating body with increase in metacentric height will be_________________?
A. same
B. higher
C. lower
D. lower/higher depending on weight of body
E. unpredictable - Non uniform flow occurs when_________________?
A. the direction and magnitude of the velocity at all points are identical
B. the velocity of successive fluid particles, at any point, is the same at successive periods of time
C. the magnitude aricf direction of the velocity do not change from point to point in the fluid
D. the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane
E. velocity, depth, pressure, etc. change from point to point in the fluid flow
