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You Are On Multi Choice Question Bank SET 312

15601. For the same heat input & compression ratio, efficiency of Otto cycle is higher than that of diesel cycle, because in Otto cycle.

15602. The single most imortant requirement for a turbine blade material is

15603. In cold working of metal as compared to its hot working

15604. __________ is the process used for setting up compressive stresses in the surface of a metal to improve its fatigue strength.

15605. Mho's scale of hardness, which consists of 10 standard minerals is used for the measurement of __________ hardness.

15606. Which of the following is a weak acid ?

15607. Pig iron is a product of

15608. Flywheel is provided in a machine to

15609. Nickel is a __________ material.

15610. Grey cast iron (used for making underground water pipes and manhole covers) as compared to steel has higher

15611. L.D. converters are generally lined with

15612. When the weight of a ball inside the ball mill is just balanced by the centrifugal force,

15613. __________ is not a heat treatment process.

15614. An ingot is hot forged to a 60% reduction in cross-section area. The percentage reduction in the volume for the above process is

15615. Volute casing of a centrifugal pump does not facilitate

15616. Desert air coolers being rendered ineffective in rainy season is due to

15617. The hydraulic radius of a circular pipe of diameter 'd' flowing full is

15618. Stainless steel is welded with difficulty because of

15619. For preparation of porous bearings by powder metallurgy, preferred particle shape is

15620. The maximum thickness of the metal which can be welded using ultrasonic welding is __________ mm.

15621. High speed steel tools retain their hardness upto a temperature of __________ °C.

15622. Wrought iron does not have

15623. Other parameters remaining same, the recrystallisation temperature of an alloy is lowered, when

15624. __________ are normally subjected to sub-zero treatment.

15625. Induced draft fans provided in large thermal power plant boilers have __________ blades.

15626. Which of the following has the highest value of refractive index ?

15627. Use of economiser in a boiler plant reduces the fuel consumption for steam generation by about __________ percent.

15628. Theoretical volume of oxygen required for complete combustion of 1Nm3 of acetylene, in oxy-acetylene welding is __________ Nm3 .

15629. Out of the following, the joint produced by __________ has the lowest strength.

15630. Dies for wire drawing are generally made of

15631. The starting of a car takes time in winter, because the

15632. The elastic strain in copper is due to the

15633. Milk is fat dispersed in water. It is an example of

15634. __________ is the most suitable lubricant for drawing mild steel wires?

15635. Reduction in the grain size reduces the __________ of the material.

15636. Absolute zero, pressure will occur, when the molecular momentum of the system becomes zero. A liquid will cease to exist as liquid at

15637. In case of simple harmonic motion, displacement is proportional to the

15638. In TIG welding, thoriated tungsten electrodes are used, because it

15639. Vernier calipers can not be used to measure the

15640. Which of the following is not the commercial name of polymethyl-methacrylate (PMMA) ?

15641. On being hit with a hammer, __________ will readily fracture.

15642. Which of the following does not discharge the dust collected as a dry solid ?

15643. Wood is a/an __________ material.

15644. The energy currency of a cell is

15645. Use of flux during soldering is done to

15646. Heart is protected by a double walled membranous bag called

15647. Resilience of a bolt can be increased by increasing its

15648. Ammonia leakage in the refrigeration system is detected by

15649. Fibre glass is a composite material of

15650. According to thermodynamic Farenhite scale, the fundamental interval between ice point to steam point is

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