Related Questions

Forty tiles of dimensions 1 foot * 2 foot each are required to completely cover a floor. How many tiles of dimensions 2 foot * 4 foot each would be required to completely cover the same floor?
A 10
B 20
C 80
D 160
How many tiles each 1 foot square are necessary to form a 1 foot border around the inside of a room 24 feet by 14 feet?
A 36
B 37
C 72
D 74
How many tiles each of 1 square foot are necessary to form a 1 foot border around the inside of a 24 feet by 14 feet room?
A 36
B 37
C 72
D 74
A survey was conducted among the students of Khulna University to find out how many forms of physical exercise usually swam, 25% said they usually did jogging, 20% said they played cricket, 15% said they usually played football and 20 respondents said they did not take any form of exercise. From the above findings it can be concluded that.
A The student of khulna University do not usually take physical exercise.
B No respondent took more than one form of exercise.
C The method of data collection was not valid.
D Some of the respondents took more than one form of exercise.
On a clean glass plate a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because:
A mercury is a metal.
B density of mercury is greater than that of water.
C cohesion of mercury is greater than its adhesion with glass.
D cohesion of water is greater than its adhesion with glass.
The ratio of the useful heat drop to the isentropic heat drop is called
A Condenser efficiency
B Nozzle efficiency
C Boiler efficiency
D Vacuum efficiency
The isentropic enthalpy drop in moving blade is two-third of the isentropic enthalpy drop in fixed blades of a turbine. The degree of reaction will be
A 0.4
B 0.56
C 0.67
D 1.67
Applying a pressure drop across a capillary results in a volumetric flow rate 'Q' under laminar flow conditions. The flow rate for the same pressure drop, in a capillary of the same length but half the radius is
A $$\frac{{\text{Q}}}{2}$$
B $$\frac{{\text{Q}}}{4}$$
C $$\frac{{\text{Q}}}{8}$$
D $$\frac{{\text{Q}}}{{16}}$$
Heat flux increases with temperature drop beyond the Leiden frost point in the plot of heat flux vs. temperature drop for a boiling liquid, because
A Convection becomes important
B Conduction becomes important
C Radiation becomes important
D Sub-cooled boiling occurs
On a clean glass plate a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because
A Mercury is a metal
B Density of mercury is greater than that of water
C Cohesion of mercury is greater than its adhesion with glass
D Cohesion of water is greater than its adhesion with glass

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