A. 23
B. 23/2
C. 25/2
D. 21/3
Related Mcqs:
- In case of a, centrifugal pump, the ratio h1/h2 is termed as the _____________ efficiency (where, h1 = actual measured head & h2 = head imparted to the fluid by impeller)?
A. Mechanical
B. Overall
C. Volumetric
D. Impeller - Good design of the casing of a centrifugal pump aims at minimising the __________________________?
A. Cavitation
B. Frictional losses
C. Kinetic energy loss
D. Static head - The type of pump used for lifting large quantity of sewage is a _________________ pump ?
A. Gear
B. Centrifugal
C. Reciprocating
D. Plunger - Two wires of the same radius & material having length in the ratio of 1 : 2 are stretched by the same force. The strain produced in the two wires will be in the ratio of__________________?
A. 1 : 1
B. 1 : 2
C. 2 : 1
D. 1 : 4 - Pressure required to increase the density of water by about 1% is ____________________ atmosphere?
A. 10
B. 50
C. 200
D. 1000 - __________________ of air does not increase with increase in temperature?
A. Density
B. Thermal diffusivity
C. Viscosity
D. Thermal conductivity - 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) - The ratio of mass of a neutron to that of an electron is about 1839. What is the ratio of the mass of a proton to that of an electron ?
A. 159
B. 1837
C. 2537
D. 10000 - The ratio of thermal & electrical conductivity is same for all the metals at the same temperature; and at around room temperature, this ratio is proportional to(where, T = absolute temperature, °K) ?
A. T
B. 1/T
C. T2
D. 1/T2 - The efficiency of a Carnot heat engine operating between absolute temperatures T1 and T2 (when, T1 > T2) is given by (T1 – T2)/T1. The co-efficient of performance (CO.P.) of a Carnot heat pump operating between T1 and T2 is given by_________________?
A. T1/(T1-T2)
B. T2/(T1-T2)
C. T1/T2
D. T2/T1
