MCQ
1101. Coefficient of velocity is defined as the ratio of--
Actual velocity of jet at vena contracta to the theoretical velocity
Area of jet at vena contracta to the area of orifice
Actual discharge through an orifice to the theoretical discharge
None of the above
1102. According to Manning's formula, the discharge through an open channel is (where M = Manning's constant)--
A x M x m 1/2 × i2/3
A x M x m 2/3 × il/2
A I/2 x M 2/3 x m x i
A 2/3 x M I/3 x m x i
1103. The mass of 2.5 m3 of a certain liquid is 2 tonnes. Its mass density is--
200 kg/m3
400 kg/m3
600 kg/m3
800 kg/m3
1104. When a plate is immersed in a liquid parallel to the flow, it will be subjected to a pressure that if the same plate is immersed perpendicular to the rоw?
Less than
More than
Equal to
None of these
1105. The solvent used in cement paint is (সিমেন্ট পেইন্ট ব্যবহৃত দ্রাবক)
trupentine
water
spirit
kerosene
1106. নালা প্রধানত নিম্নের প্রকারের-
1
3
2
4
1107. cohesion between molecules of a fluid is greater than adhesion between fluid and glass, then the free level of fluid in a dipped glass tube will be--
Higher than the surface of liquid
The same as the surface of liquid
Lower than the surface of liquid
Unpredictable
1108. The chief ingredient of a paint is --
alccohol
drier
oil
pigment
1109. Gypsum is added in the manufacture of Portland cement in order to (পোর্টল্যান্ড সিমেন্ট জিপসাম যোগ করার কারণ)
shorten the setting time of cement
lengthen the setting time of cement
decrease the burning temperature
decrease the grinding time
1110. বেজিনের সূত্রের সাহায্যে নির্গমনের সূত্র-
Ac√mi
Ac√m/i
Ac√m
Ac√m/c
1111. Liquids---
Cannot be compressed
Occupy definite volume
Are not affected by change in pressure and temperature
None of the above
1112. নিম্নের কোনটি কৃত্রিম নালা-
খাল
নদী
নর্দমা
সব কয়টি
1113. An opening in the side of a tank or vessel such that the liquid surface with the tank is below the top edge of the opening, is called--
Weir
Notch
Orifice
None of these
1114. A one dimensional flow is one which--
Is uniform flow
Is steady uniform flow
Takes place in straight lines
Involves zero transverse
1115. The ratio of the inertia force to the called Euler's number is--
Pressure force
Elastic force
Surface tension force
Viscous force
1116. The property of fluid by virtue of which it offers resistance to shear is called-
Surface tension
Adhesion
Cohesion
Viscosity
1117. An object having 10 kg mass weighs 9.81 kg on a spring balance. The value of 'g' at this place is ---
10 m/sec^2
9.81 m/sec^2
9.75 m/sec^2
9 m/sec
1118. A flow is called hyper-sonic, if the Mach number is---
Less than unity
Unity
Between 1 and 6
None of these
1119. When a cylindrical vessel containing liquid is resolved, the surface of the liquid takes the shape of--
A triangle
A paraboloid
An ellipse
None of these
1120. A fluid in equilibrium can't sustain--
Tensile stress
Compressive stress
Shear stress
Bending stress