Railway Airport and Harbour Engineering MCQs 2026

Standard gauge for Pakistan Railways is

1. A1676 mm✓
2. B1435 mm✓
3. C1000 mm✓
4. D762 mm✓

Metre gauge corresponds to track width of

1. A1676 mm✓
2. B1000 mm✓
3. C1435 mm✓
4. D2000 mm✓

Cant or superelevation on railway curves compensates

1. AWind on harbour walls✓
2. BDam uplift pressure✓
3. CBuilding live load✓
4. DCentrifugal force on rolling stock✓

Transition curve on railways allows

1. AGradual introduction of cant and curvature✓
2. BSudden track fracture✓
3. CElimination of sleepers✓
4. DRemoval of ballast✓

Turnout or points enable

1. AAircraft crosswind correction✓
2. BHarbour dredging✓
3. CTrains to move from one track to another✓
4. DDam grouting✓

Ballast on railway track provides

1. AOnly decorative cover✓
2. BDrainage elasticity and load distribution✓
3. COnly electrical insulation always✓
4. DOnly paint protection✓

Concrete sleepers offer advantage of

1. ALonger life and better track stability✓
2. BZero cost always✓
3. CNo fastening needed ever✓
4. DFloating without ballast✓

Railway track modulus depends on

1. AOnly wind rose✓
2. BOnly tide range✓
3. CBallast sleeper and subgrade stiffness✓
4. DOnly runway length✓

Maximum permissible speed on curve reduces with

1. AWider harbour berth✓
2. BHigher dam freeboard✓
3. CLarger building setback✓
4. DSharper curve radius✓

Railway alignment in plains prioritizes

1. AMaximum vertical drop✓
2. BMinimum curvature and gradient✓
3. CZero drainage✓
4. DMaximum number of reverse curves✓

Runway orientation at airports uses

1. AWind rose to minimize crosswind✓
2. BRailway cant diagram✓
3. CDam phreatic line✓
4. DSewer I/I chart✓

Crosswind component affects

1. ARailway sleeper spacing✓
2. BAircraft takeoff and landing safety✓
3. CHarbour fender only✓
4. DDam gallery width✓

Runway length requirements depend on

1. AOnly paint colour✓
2. BOnly terminal architecture✓
3. COnly baggage carousel✓
4. DAircraft type elevation and temperature✓

ICAO standards govern

1. AOnly railway turnout angle✓
2. BOnly harbour dredging contract✓
3. CInternational civil aviation design✓
4. DOnly dam spillway✓

Taxiway connects

1. ADam intake with penstock✓
2. BRunway with terminal aprons✓
3. CRail station with harbour✓
4. DSewer manhole with grit chamber✓

Apron area at airport accommodates

1. ARailway marshalling✓
2. BBreakwater armour✓
3. COxidation pond✓
4. DAircraft parking and ground servicing✓

Railway rail section IS standard weight relates to

1. AHarbour fender rubber grade✓
2. BRunway marking paint✓
3. CBuilding brick strength✓
4. DLoad carrying and stiffness✓

Airfield pavement design uses

1. AOnly CBR for highways only✓
2. BOnly railway track modulus only✓
3. CFAA or ICAO ACN-PCN method✓
4. DOnly harbour block size only✓

Harbour entrance orientation minimizes

1. AWave penetration into basin✓
2. BRail noise only✓
3. CRunway crosswind only always✓
4. DBuilding solar gain only✓

Railway subgrade in Pakistan requires

1. AOnly airport lighting✓
2. BOnly harbour fender✓
3. COnly dam curtain✓
4. DCompaction and drainage against monsoon✓

Runway end safety area provides

1. ARail buffer stop only location✓
2. BHarbour anchor zone only✓
3. CBuffer beyond threshold for overruns✓
4. DDam stilling basin only✓

Dolphin structure in harbour supports

1. ARailway signals✓
2. BMooring lines or fender systems✓
3. CRunway ILS✓
4. DDam penstock✓

Wind shear near airports is hazardous during

1. ARail shunting only✓
2. BLanding and takeoff phases✓
3. CHarbour painting only✓
4. DDam inspection only✓

Jetty extends

1. AFrom shore into water for berthing✓
2. BFrom dam into reservoir only✓
3. CFrom runway into taxiway✓
4. DFrom station into yard✓

Pakistan Railways main line connects

1. AOnly Gwadar to Skardu by air✓
2. BKarachi to Peshawar via Lahore✓
3. COnly harbour to dam✓
4. DOnly airport to metro✓

Sleeper density affects

1. ARunway friction only✓
2. BHarbour tide only✓
3. CTrack stiffness and maintenance interval✓
4. DBuilding egress width✓

Railway creep is

1. AHarbour wave creep✓
2. BAircraft taxi creep✓
3. CBuilding thermal creep only in structures✓
4. DLongitudinal movement of rails under traffic✓

Turning basin in harbour allows

1. AVessel rotation before berthing✓
2. BTrain reversal on main line✓
3. CAircraft U-turn on runway✓
4. DDam gate operation✓

Airport obstacle limitation surfaces protect

1. AHarbour dredge pipeline only✓
2. BApproach and departure airspace✓
3. CRail telegraph only✓
4. DDam gallery only✓

Railway station yard includes

1. ARunway threshold bars✓
2. BBreakwater crown✓
3. CDam spillway gates✓
4. DSidings loops and shunting tracks✓

Mooring bollard capacity must exceed

1. ADesign mooring line load✓
2. BOnly aircraft weight✓
3. COnly train weight✓
4. DOnly crane dead load✓

Quay wall retains

1. ARailway embankment only✓
2. BRunway shoulder only✓
3. CLand behind berth edge✓
4. DDam abutment only✓

Harbour silting is caused mainly by

1. ASediment transport from rivers and littoral drift✓
2. BRailway axle load✓
3. CRunway jet blast✓
4. DBuilding dead load✓

Precision approach path indicator PAPI shows

1. ARail cant deficiency✓
2. BCorrect glide path to pilots✓
3. CHarbour tidal current✓
4. DDam seepage rate✓

Runway gradient limit per ICAO is about

1. A10 percent✓
2. B20 percent✓
3. C0 percent only✓
4. D1 to 1.5 percent maximum✓

Airport reference temperature affects

1. ARail ballast gradation✓
2. BHarbour dredge pump✓
3. CAircraft climb performance✓
4. DDam sediment trap✓

Railway level crossing safety requires

1. ANo protection ever✓
2. BOnly harbour lights✓
3. COnly runway PAPI✓
4. DSignals and barriers where warranted✓

Minimum railway curve radius affects

1. AHarbour tide table only✓
2. BAirport wind rose only✓
3. CSpeed and construction cost✓
4. DBuilding FAR only✓

Railway gauge widening on curves prevents

1. AShip listing at berth✓
2. BFlange binding on inner rail✓
3. CAircraft yaw on runway✓
4. DBuilding settlement✓

Railway fish plate joins

1. ATwo rail sections in track✓
2. BHarbour fender panels✓
3. CRunway concrete slabs✓
4. DDam monoliths✓

Gwadar port significance includes

1. AOnly local fishing boats✓
2. BDeep sea access and CPEC trade route✓
3. COnly railway workshop✓
4. DOnly airport hangar✓

Karachi Port and Port Qasim serve

1. AOnly inland rail freight✓
2. BOnly domestic flights✓
3. CMajor seaborne trade of Pakistan✓
4. DOnly irrigation canals✓

Navigation channel width depends on

1. ARailway wagon length only✓
2. BAircraft wingspan on apron only✓
3. CBuilding floor height✓
4. DVessel size and maneuvering requirements✓

Fender system protects

1. ABerth structure and vessel hull during mooring✓
2. BRailway fish plates✓
3. CRunway edge lights only✓
4. DDam grout curtain✓

Tidal range affects harbour design by

1. ASetting railway gauge✓
2. BChoosing runway ILS only✓
3. CDesigning building HVAC✓
4. DControlling depth and lock gates if any✓

Berth is

1. APlace where vessel moors for loading/unloading✓
2. BRailway platform for passengers✓
3. CAircraft parking stand only✓
4. DDam stilling basin✓

Dredging in harbour maintains

1. ARailway cant excess✓
2. BRequired navigation channel depth✓
3. CRunway cross slope only✓
4. DDam freeboard only✓

Rubble mound breakwater uses

1. AOnly rail steel✓
2. BOnly bitumen mix✓
3. CQuarry stone and core material✓
4. DOnly fresh timber sleepers✓

Breakwater in harbour protects

1. ABasin from wave action✓
2. BRailway track from rain✓
3. CRunway from crosswind only✓
4. DBuilding from live load✓

Karachi Jinnah International airport serves as

1. ARailway freight yard only✓
2. BHarbour coal terminal only✓
3. CMajor hub for Pakistan aviation✓
4. DDam site camp only✓