MCQ
961. A fluid in equilibrium can't sustain--
Tensile stress
Compressive stress
Shear stress
Bending stress
962. 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
963. Liquids---
Cannot be compressed
Occupy definite volume
Are not affected by change in pressure and temperature
None of the above
964. কাঁচ তৈরির প্রধান উপাদান কোনটি?
সোডা
বালি
ম্যাগনেসিয়াম
সব গুলোই
965. The tendency of a liquid surface to contract is due to the following property-
Cohesion
Adhesion
Viscosity
Surface tension
966. 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
967. A flow is called hyper-sonic, if the Mach number is---
Less than unity
Unity
Between 1 and 6
None of these
968. The chief ingredient of a paint is --
alccohol
drier
oil
pigment
969. The Newton's law of resistance is based on the assumption that the--
Planes of the body are completely smooth
Space around the body is completely filled with the fluid
Fluid particles do not exert any influence on one another
All of the above
970. The property of fluid by virtue of which it offers resistance to shear is called-
Surface tension
Adhesion
Cohesion
Viscosity
971. For manometer, a better liquid combination is one having---
Higher surface tension
Lower surface tension
Surface tension is no criterion
High density and viscosity
972. 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
973. The solvent used in cement paint is (সিমেন্ট পেইন্ট ব্যবহৃত দ্রাবক)
trupentine
water
spirit
kerosene
974. 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
975. 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
976. Fluid is a substance that---
Always expands until it fills any container
Has the same shear stress at a point regardless of its motion
Cannot remain at rest under action of any shear force
Cannot be subjected to shear forces
977. The force exerted by a moving fluid on an immersed body is directly proportional to the rate of change of momentum due to the presence of the body. This statement is called---
Newton's law of motion
Newton's law of
Possess surface tension
all the above properties
978. 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
979. নিচের কোনটি পাতন করে তলানি হিসাবে পিচ পাওয়া যায়-
টার
অ্যাঙ্কান্ট
বিটুমিন
ইমালশন
980. 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