one mark question bank

7/18/2019 One Mark Question Bank

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1. Igniter is not required in _______Ignition.

a Hypergolic b Powder can c Non-Hypergolic d Jelly roll

2 Mono Methyl Hydraine is used in _______type o! ignition.

a "olid b Non-Hypergolic c Hypergolic

d Pyrogen

# In powder can igniter$ pellets are %ade up o!__________

a "il&er powder b 'arbon c Metal o(idants d White powder

) *hich one o! the !ollowing gi&es best per!or%ance in Non-Hypergolic ignition+

a Nitric acid, erosene b Nitric acid, iquid /2

c iquid H2, iquid /2 d Liquid H2+ Liquid O2

0 ow !requency instability is called as________

a 'hocing b Chugging c uing d "creeching

"tatic pressure drops below the &apor pressure o! the propellant causes_______

a 3orte( b Cavitations c Holes d None o! these

4 5ne o! the !ollowing syste%s is used in Missile to reach the target.

a Propulsion syste% b Guidance system c 'ontrol syste% d 'o%%unication syste%

6 *arhead is placed in _________portion o! the 7ocet

a wing b tail c %id d nose

8 H9: stands !or

a Head Up Display b Heat 9p :isplay c Head 9se :isplay d Head 9se :oppler

1; I! the range o! %issile is between 20;%-10;;% then the %issile is called as______

a ong range b "hort range c edium range d None o! these

11 <"PP responsible !or control o!

a weapons b radar c 7udder d rotar



12 allistic %issile tra=ectory has_________ phases

a si( b three c two d !our

1# >M' stands !or

a >hrust Magnetic 'ontrol b !hrust agnitude Control

c >hrust Magnitude 'oncentration d >hrust Magnetic 'oncentration

1) >hrust ter%ination allows a ___________to %easure &elocity and shutdown.

a Pintle nole b "pacecra#t c <ircra!t d Jet tabs

10 >he nu%ber o! steps in stage separation technique is usually between________

a 1-6 b $%& c 2- d )-

1 "tage separation technique is used to reduce the

a 5(idier b 'uel c *or load d Payload

14 >he radiation process in rocet %aterial is caused by__________

a separation b iquid stage c (oni)ation d ?aseous stage

16 >he space en&iron%ent is not ha&ing the !ollowing one_________

a "olar radiation b (nduction #ield c @lectro%agnetic !ield d "olar wind

18 In general cera%ics does not ha&e__________

a !ensile strength b "hear strength c 'o%pressi&e strength d >orsion

2; <ir to <ir %issile __________%aterial is used as a heat sin in nose section.

a <lu%inu% ,!iber glass b "tainless steel +#i*er glass

c steel ,!iber glass d "tainless steel ,>itaniu%

1. ipropellant rocets has cha%ber length o! ______

a ,-%. m b ;.2;-;.20% c ;.1;-;.2;% d ;.2;-;.#;%

2 Mediu% !requency instability is called as________

a 'hocing b 'hugging c /u))ing d "creeching



) oran stands !or

a ost range na&igation b ow range na&igation

c east range na&igation d Long range navigation

0 Noise created by the bubbles in the liquid syste% is called______

a locing b uing c Geysering e##ect d "creeching

>he te%perature one between ##;-);;;c in co%bustion cha%ber is called as______

a /uy inter!ace b Induction one

c 0rimary com*ustion )one d "econdary co%bustion one

6 I! the range o! %issile is between 16;;%-2;;;%$ then the %issile is called as______

a Long range b "hort range c Mediu% range d None o! these

8 >urbo pu%p !eed syste% is pre!erred !or_______

a High thrust liquid engines b High thrust gaseous engines

c High thrust solid engines d low thrust solid engines

1; AAA..is generated during radio trans%ission.

a 1lectromagnetic waves b Magnetic !lu(c @lectric !ield d Magnitude induction

11 ooster charge and %ain charge is placed in _______

a Pyrotechnic b Powder can c lco 3et d Pyrocore

12 I>@ stands !or

a uilt Internal>est @quip%ent b uilt Inside >est @quip%ent

c uilt In >ransistor @quip%ent d /uilt (n !est 1quipment

1# In thrust ter%ination technique $ cha%ber destruction is used to _________

a 4educe cham*er pressure b Increase cha%ber pressure

c @(tinguish !la%e d None o! these

1) /ollowing one is the type o! stage seperation technique________



a >er%ination b Ullage roc5et technique

c <ug%entation d 'ut-o!!

10 <erodyna%ic controls o! the 7ocet are di&ided into ________types.

a >wo b @ight c 'ive d "e&en

1 ocalier is used in

a (L" b I5P c I<P d I"I

14 "ur!ace to sur!ace %issiles uses ________ %aterial !or I7 ho%ing.

a <l alloy b oric o(ide c rsenic tri sulphate d <rsenic di sulphate

16 ?raphite inserts with cera%ic coatings are used !or______

a tail b no))le c wing d !ore body

18 "atellites are used in

a Glo*al 0ositioning "ystem b ?lobal Point "yste%

c ?lobal Plane "yste% d ?ala(y Positioning "yste%

2; In ________control$ control sur!aces are placed !orward o! the body

a *ing b >ail c Canard d >ailless

1. urst da%pers are placed in _________igniters.

a i&e b iquid c Gaseous d "olid

2 _____________ co%binations are used in hypergolic ignition.

a Berosene ,52 b <%%onia,"2 c 6erosene +4'7 d MMH,52

# 7ed !u%ing nitric acid is also called as _______

a <niline b Hydraine c MMH d 4'7

) :oppler radar is used !or__________

a Long range b "hort range c Mediu% range d None o! these

0 ________syste% sends appropriate co%%ands to the control syste%.

a Propulsi&e b *eather c Guidance d 7adar

Most !requently used nose con!iguration in 7ocet is______



a He%ispherical b lunder c Ogival d 'one

4 :rag produced due to the pressure di!!erence is called ______

a 3iscous drag b 0ro#ile drag c *a&e drag d Induced drag

6 ?ra&ity turn is also called as the _______ a 8ero li#t tra3ectory b Ma(i%u%li!t tra=ectory

c Mini%u%li!t tra=ectory d Mediu% li!t tra=ectory

8. _________syste% is used !or %aneu&ering the %issile.

a /light b >racing c Guidance d None o! these

1; >he &alue o! the 9ni&ersal ?ra&itational constant is_______%#CBg-sec2

a 6.4;D1;-11 b .4;D1;-2# c 4.4;D1;-11 d &,&9:$%$$

11 >hrust !orces nor%al to the plane o! %otion %ay be caused by________

a "econdary control b Pri%ary control

c !hrust ;ector Control d >hrust ter%ination

12 7ocet de&iates !ro% its original tra=ectory is called as________

a :e!lection b Misalign%ent c Dispersion d >er%ination

1# >hrust &ector control o! the %ain rocet nole is goes through the_________

a 'enter o! pressure b Center o# gravity c <erodyna%ic center d Pitch angle

1) ________are &ery e!!ecti&e !or controlling the &ehicle !light in the earthEs at%osphere.

a Jet tabs b Jet &anes c Jeta&ators d erodynamic #ins

10 @lectronically generated display with the input controls is called

a analog display b !ouch screen c Manual display d Mechanical display

1 ________uses one %otor !or all stages o! %issiles.

a Jet tabs b u<iliary 3ets c Jet &anes d Jeta&ators



14 In the ballistic %issiles$ the air!ra%e o! %issiles e(perience high te%perature due

to_________

a erodynamic heating b "olar radiation

c "olar wind d 'os%ic rays

16 In the case o! short-range %issiles$ %aterials can withstand up to the te%perature li%it

o!______ oc

a 6;; b ;; c . d 8;;

18 <:/ is used in_________

a 'o%%unication syste% b 7avigation system

c I" d ?P"

2; <t 4;;;B$ nose cone is surrounded by _______

a MMH b Hot plasma c Nitrogen d 93

1. >he oscillation o! the liquid in the tan causes________

a 0ropellant slosh b 'hoc c 3orte( d Hole

2 >he Ignition ti%e duration o! squib is_______%s

a 10;-0;; b 2-#.0 c 0-0; d ,=%$

# High !requency instability is called as________

a 'hocing b 'hugging c uing d "creeching

) Propellant !eed syste% has _______ principal !unctions.

a one b two c three d !our

ong range %issiles ha&ing the distance o!_______

a *ove $= 5m b <bo&e 11;; % c <bo&e 6;; % d <bo&e ;; %

4 <nother na%e !or pri%ary sur&eillance 7<:<7

a Mirror i%age radar b ow !requency radar

c "5in paint radar d None o! these



6 ____________ is a na&igation %issile.

a /allistic missile b >actical %issile c ""M d "trategic %issile

8 3elocity incre%ent in the >siolo&syEs equation is called as the__________

a (deal velocity b urnout &elocity c 'ut-o!! &elocity d Pea &elocity

1; ________ para%eter is i%portant to !ind the ideal &elocity o! the rocet.

a Pressure ratio b ass ratio c >e%perature ratio d 3olu%e ratio

11 /or !inding the pitch angle$ consider the gra&itational !ield is______

a Monoclinic b Homogeneous c Heterogeneous d None o! these

12 >o reduce the aerodyna%ic !orces on a 7ocet$ eep the angle o! attac as________

a "table b High c "mall d ero

1# @ stands !or

a 1lectro Luminescence b @lectro ight

c @lectro aser d @lectronic aser

1) >hrust direction control by the use o! rings is called___________

a "wi&eling noles b "poilers c >etavators d Jet &anes

10 /our &anes per nole is placed in _________%echanis%.

a Jeta&ators b >et vanes c ?i%baled engine d Nole de!lection.

1 Jet tabs ha&e been success!ully used in_________ %issiles.

a ong range b !actical c "trategic d "hort range

14 "@'< is the

a "eparate calling b "elective calling c "electi&e calculation d "ensor calling

16 M" stands !or

a icrowave Landing "ystem b Microcontrol anding "yste%

c Microtic anding "yste% d Microwa&e ane "yste%



18 :uring re-entry the %issiles enters the at%osphere at a Mach nu%ber o! ________

a three b two c eight d !i&e

>he a%ount o! liquid o(idier in the tan at the ti%e o! co%pleting the operation o! the &ehicle is

called as the_________

a 'a&itation b outage c 3orte(ing d "losh

2 ?as enters the tan outlet pipe is cause_______

a Propellant ha%%er b 5utage c 'a&itation d ;orte<ing

# _________igniters has per!orated wire %esh.

a Pyrogen b /il% c /as5et d Jelly roll

) ooster charge consists o! _________

a Powder b Holes c 0ellets d *ires

0 ____________shape o! nose has the In!rared seeers.

a 5gi&al b *edge c Hemispherical d 'one

>he ero li!t drag o! a cylindrical body in rocet is caused by_________

a ;iscous #orce b >e%perature c :ensity d Pressure !orce

4 >he a!t portion o! the 7ocet body has the _________ shape.

a 'ylinder b >aper c /oat tail d 'one

6 "hort range %issile has the distance o! _________%

a 40; b 1;;; c 0;; d 2?

8 >he distance between the launch and i%pact point is nown as _______

a >arget range b ailistic range c aunch range d (mpact range



1; :e!lection angle o! the spoiler is ranges between________

a 6;-1;;; b 0;-6;; c 2%. d 1;;-12;;

11 AAA..is generated during radio trans%ission.

a 1lectro magnetic waves b Magnetic !lu(

c @lectric !ield d Magnitude

12 _________ nole allows the rotational %otion.

a /luid bearing b "ocet c 'le<i*le seal d ?i%baled

1# Nole supported within a gi%baled ring is called as a_________

a /luid bearing b "oc5et c /le(ible seal d None o! these

1) /ollowing one is the type o! inert liquid_______

a Co2 b Fe c 7a d H252

10 /ollowing one is the type o! reacti&e liquid_______

a 'o2 b Fe c 7a d H2O2

1 iquid in=ection is used to________

a alance cha%ber pressure b 1<tinguish pressure

c 7educe pressure d alance thrust

14 7? stands !or

a 7eal aser ?yro b 7ing aser ?as c 4ing Laser Gyro d 7ing large ?yro

16 /ore bodies %ostly uses the_________

a luminum alloy b "teel alloy c 'opper alloy d Mg alloy

18 ________coating is used to pre&ent the o(idation o! a %etallic substructure.

a Ceramic b 'opper c /iber d Metal

2; /iber glass rein!orced resin coating is used to increase the________ strength.



a >ensile b /uc5le c 'o%pressi&e d "hear

0art%/

21. a @(plain the types o! Igniters used in 7ocet syste%s.

G1

O4

b *hat are the i%portant co%ponents o! a li&e pyrotechnic igniter+ *hat are their

!unctions+

G1

22. a :iscuss the classi!ication o! supersonic guided %issiles.

G1

O4

b @(plain about the longitudinal aerodyna%ic %o%ent o! a 7ocet.

G1

2#. a :eri&e the >siolo&syEs equation o! 7ocet.

G1

O4

b @(plain about the 7ocet dispersion. *hat are the types o! dispersion+

G1

2). a @(plain the 3arious %ethods o! >hrust 3ector 'ontrol used in rocet engine

G1

O4

b :eri&e &ehicle opti%iation equation with the help o! %ass ratio and pressure

ratio. G1



20. a @(plain about <blation cooling and %ass trans!er cooling o! %issiles.

G1

O4

b *hat are the considerations !or selection o! %aterials to be used !or the

construction o! thrust cha%bers o! liquid 7ocet engines+

How do you classi!y liquid rocet in=ectors+ :escribe any one in=ector with a neat setch. G1

O4

b @(plain the pheno%enon o! propellant ha%%er in a liquid propellant rocet

engine G1

using a neat setch.

22. a *hat are the &arious types o! drag e(perienced by supersonic %issile while

passing G1

through the at%osphere+

O4

b :iscuss about the lateral aerodyna%ic %o%ent o! the 7ocet.

G1

2#. a "tate the equation o! %otion in !ree space.

G1

O4

b :eri&e the di!!erential equations o! %otion !or gra&ity turn tra=ectory

!ro% the !unda%ental equations o! 7ocet %otion. <ssu%e

the rocet %otion is two di%ensional

and in space.

G1



2). a *hat is stage separation+ @(plain any two techniques o! stage separation.

G1

O4

b @(plain about >hrust Magnitude 'ontrol o! 7ocet.

G1

20. a *hat are the possible %aterials that can be used !or nose and wings o!

short range and long range %issiles+

G1O4

b *hy graphite is used as nole %aterial+ @(plain the ad&antages and

disad&antages o! graphite as a nole %aterial

G1

Justi!y the i%portance o! selection o! co%bustion cha%ber in o&erall design

G1 o! a liquid rocet &ehicle.

O4

b :iscuss about the design consideration o! a propellant tan.

G1

22. a *hat are the i%portant aerodyna%ic design consideration o! a air-to-air %issiles+

G1

O4

b *ith the help o! a neat setch clearly e(plain how !ins i%part stability to a 7ocet

in !light in at%osphere.

G1



2#. a "tate NewtonEs law o! gra&itation. ?i&e the &ariation o! acceleration due to

gra&ity G1

with respect to altitude.

O4

b :iscuss about the burn out range and burn out ti%e under the constant thrust case.

G1

2). a @(plain the ter% %ulti staging o! rocet.

G1

O4

b @(plain about the techniques in&ol&ed in >hrust ter%ination o! 7ocet.

G1

20. a "uggest the %aterials !or the !ore bodies$ %otor case$ wing leading edges$ nole

throat.

@(plain the reasons !or suitability o! %aterial.

G1

O4

b @(plain about the heat production syste% o! %issiles.

G1

21. a rie!ly e(plain the propellant !eed syste% in 7ocet.

G1

O4

b *hat are all the stages in the co%bustion syste% o! a 7ocet+ @(plain the stages.

G1



22. a *hat is 7ocet dispersion+ @(plain the !actors cause 7ocet dispersion.

G1

O4

b @(plain the &arious !orces and %o%ents acting on a %issile while

!lying through at%osphere.

G1

2#. a :eri&e an e(pression !or burn out ti%e in ter%s o! speci!ic i%pulse$ %ass ratio

and

thrust to weight ratio o! 7ocet. <ssu%e that 7ocet de&elops constant thrust.

G1

O4

b :eri&e the 7ocet %otion in a ho%ogenous gra&itational !ield.

G1

2). a "etch and e(plain the typical !low pattern in the di&ergent section o! a 7ocet

noles

with a secondary !uel in=ection in case o! "econdary In=ection >hrust 3ector'ontrol. G1

O4

b :escribe about 9llage 7ocet technique and !iring in the hole technique.

G1

20. a @(plain about con&ecti&e cooling and radiation cooling.

G1

O4

b :iscuss about the use o! co%posite %aterials o&er the %issile.

G1



21. a :escribe the proble%s !aced by a designer in liquid propellant tan outlet design.

G1

b @(plain the pheno%enon o! K?eyseringE in liquid propellant 7ocets with a neat

setches.

G1

22. a *hat are the &arious aero dyna%ical shapes !or !ore bodies o! 7ocets +

"etch any two shapes. *hat !actors need to be considered !or their selection+

G1

b @(plain about the longitudinal aerodyna%ic %o%ent o! a 7ocet

G1

2# .a :eri&e two-di%ensional equations o! %otion o! a rocet under the in!luence o!

aerodyna%ic G1

gra&itational and thrust !orces.

O4

b :eri&e the relation between &elocity$ !light path angle and speci!ic thrust !or a rocet

undergoing a gra&ity turn tra=ectory.G1

2). a "tate the na%e o! the aerodyna%ic controls used in %issile. @(plain about the types.

G1

O4

b *hat is %eant by >3' and >M'+ "tate the di!!erence between >3' and >M'.

G1

20. a @(plain about the e!!ect o! the space en&iron%ent on %aterials.

G1

O4



b :iscuss about the aerodyna%ic heating proble% o! the %issile.

G1

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