TRB MODEL QUESTIONS FOR COMPUTER SCIENCE

1.	All modern computers operate on
	A. words B. floppies C. information D. data

2.	C++ was developed by
	A. James Gosling B. Bjarne Stroustrup C. Dan Bricklin D. Rick Mascitti

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3.	Floppy disks which are made from flexible plastic material are also called
	A. diskettes B. high–density disks C. hard disks D. templates

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4.	Which is the smallest individual unit in a program?
	A. Data B. Pointers C. Statements D. Tokens

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5.	Which of the following is not an alternative name for primary memory?
	A. Primary storage B. Mass storage C. Internal storage D. Main memory

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6.	------ writer is a word processor?
	A. WordPro B. Windows C. Msoffice D. Staroffice

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7.	Which computer company invented the RAM chip?
	A. Motorola B. Toshiba C. Intel D. IBM

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8.	The first large commercial magnetic disk storage device was introduced in 1956 by
	A. IBM B. Hewlett–Packard C. Victor Poor D. Digital Equipment Corporation

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9.	What is the use of cut option?
	A. Change B. Shift C. Move D. Copy

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10.	Which one of the following is not a word processor?
	A. StarWriter B. Ms Word C. Notepad D. Wordstar

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Nuclear Physics - TRB Physics Study Materials

SI NO.	QUESTIONS	ANSWERS
1.	The clock in moving rocket will?	Go slower
2.	Ratio activity was discovered by?	Galileo
3.	The elements which exhibits the natural radioactivity property they are called?	Radioactive elements
4.	The mass of particle was found to be?	Four times that of hydrogen
5.	The distance through which an particle travels in a substance before coming to rest is called?	Range of the particle
6.	Which element should under go     -decay?	Only heavy nuclei with A > 200
7.	In the case of radioactive elements the height of the potential barrier is about?	9Mev
8.	For the treatment of thyroid gland the radioisotope used is?	Iodine 131
9.	The first nuclear reactor was built in?	Cicago
10.	Pions are related to?	Nuclear interactions
11.	If the distance between two charges is doubled then the force between them is?	Quadrupled
12.	Example of cyclic accelerator are?	Linear accelerator, cyclotron and betatron
13.	In GM counter the applied potential is increased the counting begins and rises rapidly to a flat portion of the curve called?	Plateau
14.	One of the earliest methods of radiationdetection was?	Spinthariscope
15.	The multiplier stages inside the scintillation counter is?	10-14
16.	A particle accelerator is a device which is used for?	Increasing the K.E. of charged particle
17.	The final energy of the ion in the linear accelerator is depends upon?	Total number of gaps and energy gained in each gap
18.	The particles are ejected out of the cyclotron is?	Not continuously but as pulsed streams
19.	The ions travel in a circular path of the cyclotron with radius ‘r’ given by?	Mv/be
20	Synchrocyclotron is  a modified form of the?	Lawrence cyclotron
21	In electron synchrotron electrons are injected into an orbit of fixed radius at an initial energy of about?	50-80 Kev
22	Atoms are different elements having the same number of neutrons is called?	Isotones
23	The high value of the nuclear density shows that the nuclear matter is in an extremely?	Compressed state
24	93.1 Mev is equal to?	1 amu
25	Binding energy per nucleon for uranium is?	7.6 Mev

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Nuclear Physics ( Part 2 ) - TRB Physics Study Materials

SI NO.	QUESTIONS	ANSWERS
1.	Nuclear force is the ?	Strongest force
2.	The half life of neutron is?	13 minutes
3.	The energy released in a fission is?	200 Mev
4.	The number of fission producing neutron is kept constant and is always equal to one, it is?	Controlled chain reaction
5.	The energy of thermal neutrons is about?	0.025 eV
6.	A liquid drop has a spherical shape due to?	Surface tension
7.	The principle of hydrogen bomb is?	Nuclear fusion
8.	The name cosmic ray was given by?	Millikan
9.	Muons were discovered in?	Cosmic ray studies
10.	Nuclear fission can be explained by?	Liquid drop model
11.	The energy of slow neutrons are?	0-10 eV
12.	Screw dislocation is a ?	Line defect
13.	The nuclear model which explains the behavior of nucleons is?	Shell model
14.	Nucleus of an atom was discovered by?	Rutherford
15.	For the nucleus that dissociates into its constituent nucleons the energy required is?	E=0
16.	Light meters are used in?	Photography
17.	The temperature above which a ferromagnetic becomes a paramagnetic material is called/	Curie temperature
18.	In a step – up transformer the turns ratio is 1:2 leclanche cell of emf 1.5 V is connected across the primary then the voltage developed in the secondary would be?	3V
19.	The unit of electric field intensity is?	Volt/metre
20	The rear view mirror in a motor car is?	Convex mirror
21	Earth quake waves are?	Ultrasonic wave
22	For the collistion between  two glass balls the co efficient of restitution is?	E=0.94
23	The relation between Cp and Cv is called?	Debye’s law
24	If the surface tension on a molecule on the free surface is zero, then the free surface will be?
25	Plane surface IF f=grad then f is a?	Scalar field

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Materials Science - TRB Physics Study Materials

SI NO.	QUESTIONS	ANSWERS
1.	Atoms or molecules are regularly arranged that solids are?	Crystalline
2.	Diamond, aluminum, polonium, copper, nickel are the examples are?	Crystalline solids
3.	Change in liquid phase or gaseous phase to solid to called as?	Crystallization+
4.	Mostly point imperfection may occurs due to the presence of?	Impurity atom
5.	Missing of atom or atoms in an atomic site is known as?	Vacancy
6.	The extra plane of atoms lying above the slip plane are called?	Positive edge dislocation
7.	This type of impurity may stay normally unfilled volume is known as?	Interstitial impurity
8.	Frankel vacancies are produced when the crystal is exposed to a high?	Radiation
9.	Slip is caused due to the motion of?	Screw dislocation
10.	Vander waals bond and hydrogen bond are the example for?	Secondary bond
11.	The example for ionic crystal is?	Nacl
12.	Vander waals bond are much weaker than	Ionic and covalent bonds
13.	Which is correct?	Covalent – ionic – metallic – hydrogen – van der waals
14.	Covalent bond is a ?	Strong bond
15.	Homogeneous mixture of two or more metals or a metal and a non-metal is called?	An alloy
16.	Angle made by the inclined plane is called?	Shear strain
17.	Hydrostatic pressure is the stress acting equally from?	All directions
18.	Force/area is known as?	Stress
19.	Ceramics are the compounds of?	Metals and non-metals
20	The property of the material which enables it to be twisted, bent or stretched, under a high stress before rupture is known as?	Toughness
21	Glasses are generally called as?	Super cooled liquids
22	I.C. engines, boiler and turbines using the principle of ?	Creep
23	High silica glass contains?	96% silica
24	Bi product is not obtained in?	Addition polymerization
25	The combination of bronze is?	Cu 90% sn 10%

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