Objective type Questions on AC coaches side I.
1.
2.
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7.
5.
1".
11.
12.
Select the correct answer
Name of the meter used to measure Air velocity a. Multi meter c. Thermometer b. Anemometer d. Ammeter Rating of Static inverter used in S A! !oaches a. 2" #$A c. 2% #$A b. &% &% #$A d. 22.'% #$A n regu regula lato torr ho ho man many in indi ding ngs s are are avai availa labl ble e in in Magnetic am*lifier a. + c. , b. & d. % Si-e of $ belts used for 2%# Alternator a. !121 c. !122 b. !12& d. !12, Name the meter used to measure relative humidity a. /S0!RS meter c. umidity meter b. Multi meter d. $oltmeter 1 ton of refrigeration is a. 12 12 3T4 c. 12""3T4 b. 12" 3T4 d. 12""" 3T4 The Thermo rmostat stat Se Sett ttin ing g for for summ summe er used used in A! co coac ache hes s a 156 156 21 c. 1'6 156 21 b. 226 226 2, d. 2"6 216 22 !alc !alcul ulat ate e deg degre ree e of of 8a 8ahre hrenhei nheitt e9u e9uiv iva alent lent to : ," ," °! a. ,"°F c. : ,"°F b. : 2"°F d. : %"°F The ga* beteen the to halves of a;ile *ulley should be a. ".% : 1." mm c. &." : ,." mm b. 2." : &." mm d. %." : %.% mm Re9ui Re9uire red d leve levell To Tor9ue r9ue Neto NetonA) connection a. 1" c. 11 b. 12 d. 1& hat are the A ca*acity of cells used in A! coaches a. 7""6 11"" c. 12"6 7"" b. %""6 12" d. 12"6 2," State State the stand standing ing *ress *ressure ure of 8 : 12 refr refrige igera rant nt use used d for for in A! coaches a. +" +" to '" c. '" to 7"
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A! 1
1&.
1,.
1%.
1+.
1'.
17.
15.
2".
21.
22.
2&.
2,.
2%.
b. 7" to 5" d. %" to +" Name of the Acid used in lead acid cells ( ) a. Sul*heric Acid c. Nitric acid b. ydrochloric Acid d. /hos*horic Acid ive the S*g ? $oltage of 8ully charged cells ( ) a. 122" ? 2.2 c. 12"" ? 2.2 b. 122" ? 2.1 d. 12"" ? 2.1 !ut in s*eed for 3<> alternator for 2%# Alternator ( ) a. 1' #M/ c. 2"#M/ b. 15 #M/ d. 22 #M/ nverter converts ( ) a. @! to A! c. A! to A! b. @! to @! d. A! to @! 8unction of S// relay ( ) a. /reventing single *hasing c. /reventing shorting of *hases b. 3oth d. None 8unction of *roving relay ( ) a. nsure of starting of c. nsure of starting of com*ressor heater o fre9uency sitching device device b. lluminating device d. Am*lifier 3attery fuse rating in A! coaches is ( ) a. 2%" A c. +"" A b. ,"" A d. 2"" A No of regulators are available in A! coaches ( ) a. 1 c. 2 b. & d. , ne RM/4 A! coach is *rovided ith ho many ( ) com*ressors. a. , NoBs sealed com*ressor c. , NoBs o*en ty*e com*ressor b. 2 NoBs sealed com*ressor d. 2 NoBs o*en ty*e com*ressor /S is the unit of ( ) a. /ressure c. umidity b. Tem*erature d. $elocity of gas 3oost charge of $R>A cells ( ) a. 2.& $
2+.
2'.
27.
25.
&1.
&2.
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&7.
b. 11" $A cell ( ) a. 2.& $/ cut out tri*s the com*ressor in 4nder Slung A! ( ) !oaches a. 1'.+ #g
&5.
ive the @! linC voltage in static inverter ( a. %"" c. ,"" b. +"" d. '"" 8unction of cooling *ilot relay ( a. nsure the function of c. nsure the function of heater !om*ressor b. nsure the function of d. None of the above !om*ressor<eater
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Write down the abbreviation. 1
/M
E
2
$R>A
E
&
3T
E
,
8R/!/0
E
%
3T4
E
II. True of False 1. ;*ansion valve e;*ands the gas irres*ective of load
(T < 8)
2.
M : 22 gas is used in RM/4BS
(T < 8)
&.
Refrigerant re9uirement in 4
(T < 8)
,.
Refrigerant re9uirement in RM/4 A! *lant is a**ro;imate 1% #g
(T < 8)
%.
$ane relay ensured that bloer motor has started before sitching on com*ressor.
(T < 8)
+.
T@R setting beteen 2 com*ressor of one RM/4 is 1" Sec
(T < 8)
'.
ne coach (RM/4) is having , NoBs of inverters
(T < 8)
7.
3!# com*ressors are sealed com*ressor
(T < 8)
5.
Manu ro*e com*ressors are sealed com*ressor
(T < 8) A! ,
1".
A!!> com*ressors are sealed com*ressor
(T < 8)
rite short notesE 1.
@efine RefrigerationF
2.
@efine AirG!onditioningF
&.
@ra Refrigeration cycle and indicate the *lantsF
,.
>ist out general toolsF
%.
>ist out Refrigeration toolsF
+.
>ist out ty*es of A! !oachesF
'.
>ist out *arts of 4nder Slung A! coachF
7.
>ist out *arts of RM/4 A! coachF
5.
>ist out different ty*es and maCes of cells used in A! coaches ith ca*acityF
1".
>ist out different ty*es and maCes of RM/4Hs in A! coachesF
11.
>ist out different maCes of nverters used in A! coachesF
12.
o many cells are there in a A! coachF
1&.
hat is o*erating voltage of 4nder Slung A! e9ui*mentF
1,.
hat is o*erating voltage of RM/4 A! e9ui*mentF
1%.
>ist out ty*es of RAF
1+.
o many ty*es of gauges used in A! coachF
1'.
hat are the o*erating /ressures of 4nder Slung A! coachesF
17.
@ra the tube light circuit diagramF
15.
hat is thermostat setting of heating
2".
hat is the function of A! com*ressorF
21.
Ty*e of regulator used in A! !oachesF
22.
Rating of the fuse used for *hase su**ly ? field su**ly in Regulator of A! !oaches.
2&.
@uring train run if Alternator fails to generate6 hat action and hat are the *oints to be checCed.
2,.
@escribe in detail items to be checCed during tri* schedule maintenance of A! !oach. A! %
2%.
hat attention to be *aid to Alternator during tri* schedule maintenanceF
2+.
hat is the ca*acity of cells used in A! !oachesF
2'.
hat is the off load and on load voltage of a healthy cell.
27.
hat is the voltage ? s*ecific gravity of a fully charged lead acid cellsF
25.
@uring train run suddenly lights6 fans and A! /lant gets off hat is the reason ? hat action you are going to taCeF
&".
o do you *rovide Ithrough feedingI in A! !oach.
&1.
hat action to be taCen if com*ressor does not startF
&2.
Action to be taCen if com*ressor shot circuits.
&&.
Action to be taCen if com*ressor runs continuously.
&,.
Reason for igh discharge *ressure.
&%.
Reason for lo section *ressure.
&+.
/oints to be checCed before starting A! /lant and after starting A! /lant.
&'.
@uties of A! !oach Mechanic during train run.
&7.
ive reason for less cooling and remedies.
&5.
@escribe *rocedure for re*lacement of Mane ro*e !om*ressor.
,".
@escribe *rocedure for carrying out lead test.
,1.
hat is the normal current dran by Mane ro*e !om*ressor.
,2.
hat is the normal current dran by RM/4 *lantF
,&.
Action to be taCen hen A! /lant tri*s due to lo suction *ressure.
,,.
Action to be taCen hen A! /lant tri*s due to high *ressure.
,%.
A! /lant not orCing in auto mode. hat action you are going to taCe.
,+.
o many ty*es of RA are thereF
,'.
hat is !ut in ? !ut of *ressure of RA !ut out.
A! +