Railway Airport and Harbour Engineering MCQs 2026

Standard gauge for Pakistan Railways is

1. A 1676 mm ✓
2. B 1435 mm ✓
3. C 1000 mm ✓
4. D 762 mm ✓

Metre gauge corresponds to track width of

1. A 1676 mm ✓
2. B 1000 mm ✓
3. C 1435 mm ✓
4. D 2000 mm ✓

Cant or superelevation on railway curves compensates

1. A Wind on harbour walls ✓
2. B Dam uplift pressure ✓
3. C Building live load ✓
4. D Centrifugal force on rolling stock ✓

Transition curve on railways allows

1. A Gradual introduction of cant and curvature ✓
2. B Sudden track fracture ✓
3. C Elimination of sleepers ✓
4. D Removal of ballast ✓

Turnout or points enable

1. A Aircraft crosswind correction ✓
2. B Harbour dredging ✓
3. C Trains to move from one track to another ✓
4. D Dam grouting ✓

Ballast on railway track provides

1. A Only decorative cover ✓
2. B Drainage elasticity and load distribution ✓
3. C Only electrical insulation always ✓
4. D Only paint protection ✓

Concrete sleepers offer advantage of

1. A Longer life and better track stability ✓
2. B Zero cost always ✓
3. C No fastening needed ever ✓
4. D Floating without ballast ✓

Railway track modulus depends on

1. A Only wind rose ✓
2. B Only tide range ✓
3. C Ballast sleeper and subgrade stiffness ✓
4. D Only runway length ✓

Maximum permissible speed on curve reduces with

1. A Wider harbour berth ✓
2. B Higher dam freeboard ✓
3. C Larger building setback ✓
4. D Sharper curve radius ✓

Railway alignment in plains prioritizes

1. A Maximum vertical drop ✓
2. B Minimum curvature and gradient ✓
3. C Zero drainage ✓
4. D Maximum number of reverse curves ✓

Runway orientation at airports uses

1. A Wind rose to minimize crosswind ✓
2. B Railway cant diagram ✓
3. C Dam phreatic line ✓
4. D Sewer I/I chart ✓

Crosswind component affects

1. A Railway sleeper spacing ✓
2. B Aircraft takeoff and landing safety ✓
3. C Harbour fender only ✓
4. D Dam gallery width ✓

Runway length requirements depend on

1. A Only paint colour ✓
2. B Only terminal architecture ✓
3. C Only baggage carousel ✓
4. D Aircraft type elevation and temperature ✓

ICAO standards govern

1. A Only railway turnout angle ✓
2. B Only harbour dredging contract ✓
3. C International civil aviation design ✓
4. D Only dam spillway ✓

Taxiway connects

1. A Dam intake with penstock ✓
2. B Runway with terminal aprons ✓
3. C Rail station with harbour ✓
4. D Sewer manhole with grit chamber ✓

Apron area at airport accommodates

1. A Railway marshalling ✓
2. B Breakwater armour ✓
3. C Oxidation pond ✓
4. D Aircraft parking and ground servicing ✓

Karachi Jinnah International airport serves as

1. A Railway freight yard only ✓
2. B Harbour coal terminal only ✓
3. C Major hub for Pakistan aviation ✓
4. D Dam site camp only ✓

Breakwater in harbour protects

1. A Basin from wave action ✓
2. B Railway track from rain ✓
3. C Runway from crosswind only ✓
4. D Building from live load ✓

Rubble mound breakwater uses

1. A Only rail steel ✓
2. B Only bitumen mix ✓
3. C Quarry stone and core material ✓
4. D Only fresh timber sleepers ✓

Dredging in harbour maintains

1. A Railway cant excess ✓
2. B Required navigation channel depth ✓
3. C Runway cross slope only ✓
4. D Dam freeboard only ✓

Berth is

1. A Place where vessel moors for loading/unloading ✓
2. B Railway platform for passengers ✓
3. C Aircraft parking stand only ✓
4. D Dam stilling basin ✓

Tidal range affects harbour design by

1. A Setting railway gauge ✓
2. B Choosing runway ILS only ✓
3. C Designing building HVAC ✓
4. D Controlling depth and lock gates if any ✓

Fender system protects

1. A Berth structure and vessel hull during mooring ✓
2. B Railway fish plates ✓
3. C Runway edge lights only ✓
4. D Dam grout curtain ✓

Navigation channel width depends on

1. A Railway wagon length only ✓
2. B Aircraft wingspan on apron only ✓
3. C Building floor height ✓
4. D Vessel size and maneuvering requirements ✓

Karachi Port and Port Qasim serve

1. A Only inland rail freight ✓
2. B Only domestic flights ✓
3. C Major seaborne trade of Pakistan ✓
4. D Only irrigation canals ✓

Gwadar port significance includes

1. A Only local fishing boats ✓
2. B Deep sea access and CPEC trade route ✓
3. C Only railway workshop ✓
4. D Only airport hangar ✓

Railway fish plate joins

1. A Two rail sections in track ✓
2. B Harbour fender panels ✓
3. C Runway concrete slabs ✓
4. D Dam monoliths ✓

Railway gauge widening on curves prevents

1. A Ship listing at berth ✓
2. B Flange binding on inner rail ✓
3. C Aircraft yaw on runway ✓
4. D Building settlement ✓

Minimum railway curve radius affects

1. A Harbour tide table only ✓
2. B Airport wind rose only ✓
3. C Speed and construction cost ✓
4. D Building FAR only ✓

Railway level crossing safety requires

1. A No protection ever ✓
2. B Only harbour lights ✓
3. C Only runway PAPI ✓
4. D Signals and barriers where warranted ✓

Airport reference temperature affects

1. A Rail ballast gradation ✓
2. B Harbour dredge pump ✓
3. C Aircraft climb performance ✓
4. D Dam sediment trap ✓

Runway gradient limit per ICAO is about

1. A 10 percent ✓
2. B 20 percent ✓
3. C 0 percent only ✓
4. D 1 to 1.5 percent maximum ✓

Precision approach path indicator PAPI shows

1. A Rail cant deficiency ✓
2. B Correct glide path to pilots ✓
3. C Harbour tidal current ✓
4. D Dam seepage rate ✓

Harbour silting is caused mainly by

1. A Sediment transport from rivers and littoral drift ✓
2. B Railway axle load ✓
3. C Runway jet blast ✓
4. D Building dead load ✓

Quay wall retains

1. A Railway embankment only ✓
2. B Runway shoulder only ✓
3. C Land behind berth edge ✓
4. D Dam abutment only ✓

Mooring bollard capacity must exceed

1. A Design mooring line load ✓
2. B Only aircraft weight ✓
3. C Only train weight ✓
4. D Only crane dead load ✓

Railway station yard includes

1. A Runway threshold bars ✓
2. B Breakwater crown ✓
3. C Dam spillway gates ✓
4. D Sidings loops and shunting tracks ✓

Airport obstacle limitation surfaces protect

1. A Harbour dredge pipeline only ✓
2. B Approach and departure airspace ✓
3. C Rail telegraph only ✓
4. D Dam gallery only ✓

Turning basin in harbour allows

1. A Vessel rotation before berthing ✓
2. B Train reversal on main line ✓
3. C Aircraft U-turn on runway ✓
4. D Dam gate operation ✓

Sleeper density affects

1. A Runway friction only ✓
2. B Harbour tide only ✓
3. C Track stiffness and maintenance interval ✓
4. D Building egress width ✓

Railway creep is

1. A Harbour wave creep ✓
2. B Aircraft taxi creep ✓
3. C Building thermal creep only in structures ✓
4. D Longitudinal movement of rails under traffic ✓

Pakistan Railways main line connects

1. A Only Gwadar to Skardu by air ✓
2. B Karachi to Peshawar via Lahore ✓
3. C Only harbour to dam ✓
4. D Only airport to metro ✓

Jetty extends

1. A From shore into water for berthing ✓
2. B From dam into reservoir only ✓
3. C From runway into taxiway ✓
4. D From station into yard ✓

Wind shear near airports is hazardous during

1. A Rail shunting only ✓
2. B Landing and takeoff phases ✓
3. C Harbour painting only ✓
4. D Dam inspection only ✓

Railway rail section IS standard weight relates to

1. A Harbour fender rubber grade ✓
2. B Runway marking paint ✓
3. C Building brick strength ✓
4. D Load carrying and stiffness ✓

Airfield pavement design uses

1. A Only CBR for highways only ✓
2. B Only railway track modulus only ✓
3. C FAA or ICAO ACN-PCN method ✓
4. D Only harbour block size only ✓

Harbour entrance orientation minimizes

1. A Wave penetration into basin ✓
2. B Rail noise only ✓
3. C Runway crosswind only always ✓
4. D Building solar gain only ✓

Railway subgrade in Pakistan requires

1. A Only airport lighting ✓
2. B Only harbour fender ✓
3. C Only dam curtain ✓
4. D Compaction and drainage against monsoon ✓

Runway end safety area provides

1. A Rail buffer stop only location ✓
2. B Harbour anchor zone only ✓
3. C Buffer beyond threshold for overruns ✓
4. D Dam stilling basin only ✓

Dolphin structure in harbour supports

1. A Railway signals ✓
2. B Mooring lines or fender systems ✓
3. C Runway ILS ✓
4. D Dam penstock ✓