MCQOPTIONS
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MCQOPTIONS
This section includes 2242 Mcqs, each offering curated multiple-choice questions to sharpen your Php knowledge and support exam preparation. Choose a topic below to get started.
| 701. |
Why ketenes absorb in IR at a very high frequency (2150 cm-1)? |
| A. | The inner C is sp hybridized |
| B. | The more s character in a bond, the stronger it is |
| C. | Inner C is sp2 hybridized |
| D. | Inner C is sp3 hybridized |
| Answer» D. Inner C is sp3 hybridized | |
| 702. |
Which compound having molecular formula C5H10 shows absorption at 1380 cm-1? |
| A. | 2-Methyl-1-butene |
| B. | Cyclopentane |
| C. | Pentyne |
| D. | Methylcyclobutane |
| Answer» C. Pentyne | |
| 703. |
Why in the IR spectrum of Benzoyl chloride, a weak band near 1750 cm-1 is formed? |
| A. | Inductive effect |
| B. | Fermi resonance between C = O band and first overtone |
| C. | Conjugation effect |
| D. | Hyperconjugation effect |
| Answer» C. Conjugation effect | |
| 704. |
When no.1 piston of a four cylinder in line four stroke engine is performing the power stroke, no.4 piston is on the stroke called _______ |
| A. | Suction |
| B. | Compression |
| C. | Power |
| D. | Exhaust |
| Answer» B. Compression | |
| 705. |
The purpose of a piston pin is that _________ |
| A. | It prevents the valve from rotating |
| B. | It links the connecting rod to the crankshaft |
| C. | It ensure the piston ring to the piston |
| D. | It connect the piston to the connecting rod |
| Answer» E. | |
| 706. |
What type of material is used for Gudgeon pin? |
| A. | Cast iron |
| B. | Aluminium |
| C. | Steel alloy of high strength |
| D. | Hardened and ground steel |
| Answer» D. Hardened and ground steel | |
| 707. |
Piston compression rings are made of _____________ |
| A. | Cast iron |
| B. | Steel |
| C. | Aluminium |
| D. | Bronze |
| Answer» B. Steel | |
| 708. |
Engine pistons are generally made of aluminium alloy because ______ |
| A. | It is lighter |
| B. | It is stronger |
| C. | It has less wear |
| D. | It absorbs shock |
| Answer» B. It is stronger | |
| 709. |
Connecting rod is attached to the piston by the ___________ |
| A. | Rod cap |
| B. | Piston pin |
| C. | Cap bolt |
| D. | Lower cap |
| Answer» C. Cap bolt | |
| 710. |
The escape of burned gases from the combustion chamber past the pistons and into the crankcase is called _______ |
| A. | Gas loss |
| B. | Blow by |
| C. | By pass |
| D. | Passed gas |
| Answer» C. By pass | |
| 711. |
The purpose of crankcase ventilation is to __________ |
| A. | Cool the oil |
| B. | Remove vaporised water and fuel |
| C. | Supply oxygen to the crankcase |
| D. | It assists in maintaining the viscosity of oil |
| Answer» C. Supply oxygen to the crankcase | |
| 712. |
In general, What type of section is used for connecting rods? |
| A. | Forged I-section |
| B. | Forged round section |
| C. | Cast iron square section |
| D. | Forged square section steel |
| Answer» B. Forged round section | |
| 713. |
The function of crankcase in two stroke petrol engines is _________ |
| A. | It lower downs the temperature |
| B. | It forms a pressurised chamber for fuel air mixture |
| C. | It holds the exhaust gases after combustion |
| D. | None of the mentioned |
| Answer» C. It holds the exhaust gases after combustion | |
| 714. |
Which of the following cement are not used as a cement replacement? |
| A. | Siliceous fly ash |
| B. | Calcareous fly ash |
| C. | Silica fume |
| D. | Slag cement |
| Answer» D. Slag cement | |
| 715. |
Which of the following is not an application of synthetic resins? |
| A. | Textile |
| B. | Paint |
| C. | Thermal insulation |
| D. | Ion exchange |
| Answer» D. Ion exchange | |
| 716. |
Neoprene was originally known as ________ |
| A. | Phenol formaldehyde |
| B. | Coumarone-indene |
| C. | Polychloroprene |
| D. | Polyvinyl halides |
| Answer» D. Polyvinyl halides | |
| 717. |
________ is produced due to a chemical reaction between two or more substances. |
| A. | Synthetic resin |
| B. | Metallurgical coke |
| C. | Fiber |
| D. | Whisker |
| Answer» B. Metallurgical coke | |
| 718. |
What is the maximum permissible amount of ash on carbonization after coal is washed? |
| A. | 2% |
| B. | 6% |
| C. | 14% |
| D. | 21% |
| Answer» C. 14% | |
| 719. |
Parian cement plaster is obtained when ________ is calcined with POP. |
| A. | Pearl ash |
| B. | Alum |
| C. | Borax |
| D. | Petroleum |
| Answer» D. Petroleum | |
| 720. |
Martin’s cement plaster is obtained when __________ is calcined with POP. |
| A. | Pearl ash |
| B. | Alum |
| C. | Borax |
| D. | Borane |
| Answer» B. Alum | |
| 721. |
Popping is the formation of a _________ hole in the plastered surface. |
| A. | Circular |
| B. | Conical |
| C. | Cylindrical |
| D. | Rectangular |
| Answer» C. Cylindrical | |
| 722. |
Dislodgement of plaster from the background is called as ________ |
| A. | Peeling |
| B. | Plastering |
| C. | Distempering |
| D. | Grinning |
| Answer» B. Plastering | |
| 723. |
Formation of white crystalline substance which appears on the surface due to the presence of salts in materials used for making plaster is called as __________ |
| A. | Cracking |
| B. | Crystallisation |
| C. | Efflorescence |
| D. | Crazing |
| Answer» D. Crazing | |
| 724. |
Undercoat is the first coat of plaster applied. |
| A. | True |
| B. | False |
| Answer» C. | |
| 725. |
The thin layer of cement particles formed on excessive troweling is called ________ |
| A. | Undercoat |
| B. | Peel |
| C. | Laitance |
| D. | Latch |
| Answer» D. Latch | |
| 726. |
The process of roughening the background is called as __________ |
| A. | Hacking |
| B. | Plastering |
| C. | Painting |
| D. | Damping |
| Answer» B. Plastering | |
| 727. |
Wooden strips fixed to the surface on which first coat of plaster is applied are called as _________ |
| A. | Hooks |
| B. | Grounds |
| C. | Pins |
| D. | Bars |
| Answer» C. Pins | |
| 728. |
The mixing of different constituents of plaster is called as _______ |
| A. | Flaking |
| B. | Blooming |
| C. | Gauging |
| D. | Hacking |
| Answer» D. Hacking | |
| 729. |
The process in which a file is partitioned into smaller parts and different parts are stored in different disks is ____________ |
| A. | RAID |
| B. | Mirroring |
| C. | Stripping |
| D. | RAID classification |
| Answer» D. RAID classification | |
| 730. |
What does USB stand for? |
| A. | Universal Signal Board |
| B. | Universal Signal Bus |
| C. | Universal Serial Bus |
| D. | Universal Serial Board |
| Answer» D. Universal Serial Board | |
| 731. |
Winchester disks are a type of _______ |
| A. | optical disks |
| B. | magnetic disks |
| C. | compact disks |
| D. | magnetic drives |
| Answer» C. compact disks | |
| 732. |
Drag divergence Mach number will increase by using _______________ |
| A. | area rule |
| B. | increment in total volume |
| C. | increase in drag |
| D. | drag increment at maximum area |
| Answer» B. increment in total volume | |
| 733. |
Area rule can be used for high speed aircraft only. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 734. |
Vortex generator is used to ____________ |
| A. | reattach separated flow |
| B. | increase volume |
| C. | increase surface area |
| D. | separate flow |
| Answer» B. increase volume | |
| 735. |
Interaction of components will not affect aerodynamic design of fuselage. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 736. |
Supersonic wave drag can be reduced by using ____________ |
| A. | area rule |
| B. | drag ruling |
| C. | lift augmentation |
| D. | drag augmentation |
| Answer» B. drag ruling | |
| 737. |
What is the base area of the fuselage? |
| A. | Any unfair rearward facing blunt surface |
| B. | Forward facing surface |
| C. | Wing area |
| D. | Fuselage cabin area only |
| Answer» B. Forward facing surface | |
| 738. |
Why do we provide upsweep to the lower surface at aft fuselage? |
| A. | To reduce drag |
| B. | To increase drag |
| C. | To increase lift |
| D. | To maximize drag |
| Answer» B. To increase drag | |
| 739. |
What is the elevation of a point, if the elevation of a benchmark is 200.852 m, back sight is 2.324 m, foresight is 1.836 m? |
| A. | 213.176 |
| B. | 203.176 |
| C. | 211.340 |
| D. | 201.340 |
| Answer» E. | |
| 740. |
What is the height of instrument, if elevation of benchmark is 200.852 m, back sight is 2.324 m, fore sight is 1.836 m? |
| A. | 213.176 |
| B. | 203.176 |
| C. | 211.340 |
| D. | 201.340 |
| Answer» C. 211.340 | |
| 741. |
A level provides a vertical line of sight, a line tangential to a Level surface at the point where the instrument stands. |
| A. | True |
| B. | False |
| Answer» C. | |
| 742. |
Which of the following term is best defined by the statement “The creation of a new codeline from a version in an existing codeline”? |
| A. | Branching |
| B. | Merging |
| C. | Codeline |
| D. | Mainline |
| Answer» B. Merging | |
| 743. |
Hopper bottom vertical flow type tank is _____ in shape. |
| A. | Circular |
| B. | Triangular |
| C. | Rectangular |
| D. | Elliptical |
| Answer» B. Triangular | |
| 744. |
The minimum weir loading rate of primary clarifier is ____m3/m/day. |
| A. | 125000 |
| B. | 50000 |
| C. | 10000 |
| D. | 20000 |
| Answer» B. 50000 | |
| 745. |
Which of the following is the cause of rising sludge? |
| A. | Sedimentation |
| B. | Denitrification |
| C. | Chlorination |
| D. | Flocculation |
| Answer» C. Chlorination | |
| 746. |
The detention period of a secondary clarifier is ___________ |
| A. | 30 minutes |
| B. | 1 hour |
| C. | 2 hours |
| D. | 4 hours |
| Answer» D. 4 hours | |
| 747. |
The surface loading rate of a secondary clarifier is ______ litres/m2/day. |
| A. | 1000 |
| B. | 10000 |
| C. | 20000 |
| D. | 40000 |
| Answer» E. | |
| 748. |
Recirculation increases the efficiency of high rate trickling filters. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 749. |
The size of filter media in a high rate trickling filter is ___________ |
| A. | 10-20mm |
| B. | 34-68mm |
| C. | 25-60mm |
| D. | 20-50mm |
| Answer» D. 20-50mm | |
| 750. |
The expression of the recirculation factor F is given by ___________ |
| A. | F = 1 / (1+0.1 (R/I))2 |
| B. | F = (1+ R) / (1+0.1 (R/I))2 |
| C. | F = (1+ I/R) / (1+0.1(R/I))2 |
| D. | F = (1+ R/I) / (1+0.1(R/I))2 |
| Answer» E. | |