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You Are On Multi Choice Question Bank SET 671
33551. The blades of a centrifugal impeller are said to be curved forward, if the __________ of the motion of impeller blades.
(A): inlet tip of a blade curves in a direction opposite to that (B): outlet tip of a blade curves in a direction opposite to that (C): inlet tip of a blade is towards the direction (D): outlet tip of a blade is towards the direction
33552. The molecule that has ‘S_4’symmetry element is
(A): ’C_6H_6’ (B): ’CH_4’ (C): ’C0_2’ (D): ’C_2H_2’
33553. For the same terminal conditions and fitting size, the least friction loss is incurred in a/an
(A): T-joint (B): union (C): 45° elbow (D): 90°bend
33554. Identify the point group of ‘PCI_5’
(A): ’C_3_V’ (B): ’C_3_h’ (C): ’D_3_h’ (D): None of these
33555. A floating/submerged body is always stable, if its centre of gravity
(A): lies above its centre of buoyancy. (B): and centre of buoyancy coincide. (C): lies below its centre of buoyancy. (D): lies above its meta centre.
33556. Which is an abelian group?
(A): Cyclic group (B): Acyclic group (C): Square planar group (D): Octahedral group
33557. The co-efficient of discharge of an orificemeter is a function of
(A): Reynolds number at the orifice. (B): ratio of orifice dia to pipe dia. (C): both and . (D): none of the above parameters, and has a constant value of 0.61.
33558. Which of the following molecules have center of symmetry?
(A): ’CH_4’ (B): ’SO_2’ (C): ’C_6H_6’ (D): ’SF_4’
33559. Critical velocity in a pipe flow
(A): increases as fluid viscosity increases. (B): increases as pipe diameter increases. (C): independent of fluid density. (D): none of these.
33560. Sum of squares of the dimensions of the irreducible representation of a group will be equal to
(A): Order of the group (B): Character of the group (C): Square of the group (D): None of these
33561. A centrifugal pump designed to pump water is employed to pump a more viscous oil. In the later case, the pump
(A): develops a lower head. (B): capacity is reduced. (C): requires more power. (D): all , and .
33562. The stable end product of Uranium series is
(A): ’_83Bi^209’ (B): ’_82Pb^206”” (C): ’_82Pb^207’ (D): ’_82Pb^209’
33563. In an incompressible flow of fluid, the fluid
(A): temperature remains constant. (B): compressibility is greater than zero. (C): density does not change with pressure & temperature. (D): is frictionless.
33564. Intersystem crossing is essential for
(A): Phosphorescence (B): Fluroscence (C): Photosensitisation (D): Chemiluminescence
33565. The ratio of maximum to average velocity in case of streamline flow between parallel plates is
(A): 1 (B): 1.5 (C): 2 (D): 2.5
33566. The lowest lattice energy among the following crystals is
(A): NaCl (B): KCl (C): RbCl (D): CsCl
33567. A weir is used to measure the large water discharge rate from a river or from an open channel. A weir is not of __________ shape.
(A): circular (B): rectangular (C): triangular (D): trapezoidal
33568. Improper rotation axis contains
(A): Reflection and refraction (B): Rotation and reflection (C): Inversion and refraction (D): Center of symmetry and rotation
33569. Pressure co-efficient is the ratio of pressure forces to __________ forces.
(A): gravity (B): inertial (C): viscous (D): none of these
33570. Which among the following state functions is an extensive property of the system?
(A): Temperature (B): Volume (C): Viscosity (D): Refractive index
33571. Which of the following conditions must be satisfied for lift force to be developed ?
(A): The body should be bluff body. (B): The body should be stream lined. (C): Circulation around the body is essentially required. (D): The main stream velocity must approach the velocity of sound in that fluid medium.
33572. The splitting of spectral lines in an electric field is called
(A): Zeeman effect (B): Photoelectric effect (C): Stark effect (D): Thomson effect
33573. The Reynolds number for an ideal fluid flow is
(A): 4 (B): 2100-4000 (C): 4000 (D): ∞
33574. Which is true about the isobars?
(A): They have same mass number and same atomic number (B): They have same mass number and different atomic number (C): They have different mass number and same atomic number (D): They have different mass number and different atomic number
33575. The fluid property, due to which, mercury does not wet the glass is
(A): surface tension (B): viscosity (C): cohesion (D): adhesion
33576. ’CO_2’is isostructural with
(A): ’H_20’ (B): ’N0_2’ (C): ’H_2S_’ (D): ’C_2H_2’
33577. Laminar flow of a Newtonion fluid ceases to exist, when the Reynolds number exceeds
(A): 4000 (B): 2100 (C): 1500 (D): 3000
33578. According to Wade’s rule,’C_2B_4H_8’adopts
(A): Closo-structure (B): Arachno-structure (C): Nido-structure (D): Hypho-structure
33579. When the momentum of one fluid is used for moving another fluid, such a device is called a/an
(A): jet pump (B): blower (C): acid egg (D): none of these
33580. Which is more basic?
(A): Pyridine (B): Pyrimidine (C): Pyrrole (D): Piperidine
33581. The normal stress is the same in all directions at a point in a fluid, when the fluid is
(A): non-viscous. (B): incompressible. (C): both and . (D): having no motion of one fluid layer relative to the other.
33582. Chloropicrin is
(A): ’CH_3NO_2’ (B): ’Cl_3CNO_2’ (C): ’CHCl_3’ (D): None of these
33583. Head developed by a centrifugal pump depends on its
(A): speed (B): impeller diameter (C): both and (D): neither nor
33584. Which one of the following is a vat dye?
(A): Alizarin (B): Indigo (C): Malachite green (D): Martius yellow
33585. Which of the following is not used as a binder in coal briquetting ?
(A): Tar (B): Molasses (C): Pitch (D): Line
33586. Patterno-Buchi reaction is
(A): Rearrangement of ‘alpha’,’beta’-unsaturated ketone (B): Photosensitisation of butadiene (C): Photochemical oxidation (D): Cycloaddition of carbonyl compound to alkene
33587. Size of blast furnace grade coke is __________ mm.
(A): 25-80 (B): 0-15 (C): 15-25 (D): >100
33588. An antiredeposition agent in detergents
(A): STPP (B): CMC (C): SDS (D): Sodium perborate
33589. Presence of __________ in a dry gaseous fuel does not contribute to its calorific value.
(A): sulphur (B): oxygen (C): hydrogen (D): carbon
33590. p-azoxyanisole is an example of
(A): Semiconductor (B): Super conductor (C): Liquid crystal (D): None of these
33591. The internal energy of the combustion products is __________ compared to that of reactants.
(A): more (B): less (C): equal (D): more or less ; (depends on the state of fuel.)
33592. Which of the following will occur farthest downfield in ‘^|H’-‘NMR’spectrum?
(A): Benzene (B): Ethyne (C): Dimethyl ether (D): Formaldehyde
33593. Which of the following is not a product of tar distillation ?
(A): Phenol & naphthalene (B): Benzol & pitch (C): Anthracene & creosote (D): None of these
33594. One mole of sugar is dissolved in three mole of water.The relative lowering of vapor pressure is
(A): 42737 (B): 42738 (C): 1/4 (D): 42740
33595. Junker's calorimeter is used to determine the calorific value of
(A): pulverised coal (B): gaseous fuels (C): fuel oil (D): none of these
33596. Which one of the following solutions would produce maximum elevation in boiling point?
(A): 0.1 M glucose (B): 0.2 M sucrose (C): 0.1 M ‘Ba’(NO_3_)_2 (D): 0.1 M’MgSO_4’
33597. Combustion reaction of fuels is a/an __________ reaction.
(A): auto catalytic (B): exothermic (C): endothermic (D): none of these
33598. Isotonic solutions have
(A): Same freezing point (B): Same boiling point (C): Same viscosity (D): Same osmotic pressure
33599. Improper storage condition results in the weathering of coal and spontaneous combustion, which increases its
(A): caking index. (B): yield of carbonised products. (C): friability & oxygen content. (D): calorific value.
33600. The metal iron present in phosphotranferase enzyme is
(A): Mg (B): Fe (C): P (D): Ni
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