15151. A steam carraying pipeline is insulated with two layers of insulating materials with the inferior insulation material forming the inner part. If the two insulating layers are interchanged, the heat conducted will
15152. Damage to metal surface by mechanical action is called
15153. The escape velocity of a body on earth which is independent of its mass is about __________ km/second.
15154. Which of the following test is used for distinguishing among dry oils, semi-drying oils and non drying oils ?
15155. The wet bulb temperature is lower in dry air than in wet air at the same temperature. A dry bulb thermometer registers a higher temperature than a wet bulb thermometer except at __________ percent relative humidity.
15156. The process of removal of scale formed during hot rolling of steel is termed as
15157. A psychrometer does not measure the __________ temperature of moist air.
15158. An ideal material for making cooking vessels should have
15159. Which of the following approaches the ideal gas behaviour most closely ?
15160. Which of the following is not the function of a volute casing provided in a centrifugal pump ?
15161. The pressure outside a bubble/droplet of liquid is __________ the internal pressure.
15162. Two wires of the same radius & material having length in the ratio of 1 : 2 are stretched by the same force. The strain produced in the two wires will be in the ratio of
15163. Powder metallurgy technique is used in the production of __________ tools.
15164. Principal alloying elements of cast tool alloys which have very high wear resistance & high temperature strength are
15165. Which of the following is the most suitable material of construction for the condenser tubes, where the cooling medium is brine (salty water)?
15166. Which of the following is an ore dressing operation ?
15167. Gratings is associated with the measurement of
15168. __________ joint is mostly used for joining pipes carrying water at low pressure.
15170. In a counter flow heat exchanger, hot fluid enters at 170°C & leaves at 150°C, while the cold fluid enters at 50°C & leaves at 70°C. The arithmetic mean temperature difference in this case is __________ °C.
15171. Normalising of a casting does not
15172. The swift cup test evaluates the following property of a sheet metal.
15173. __________ is the most important element, which controls the physical properties of steel.
15174. The emf of a Deniell cell can be increased by
15175. A hot short metal is
15176. Corrosion rate can not be lowered by reducing the __________ of the corroding medium.
15177. Routing in production, planning & control is concerned with the
15178. A fire tube boiler is limited to a maximum steam pressure of about __________ kg/cm2.
15179. The total frictional resistance to fluid flow does not depend upon the
15180. Stretcher strains found in a low carbon sheet are associated with the
15181. The most important consideration, while designing the refrigeration system of an aircraft is that the refrigeration system
15182. Though tin occurs lower than iron in the electrochemical series, yet it is coated on steel for corrosion protection, because of its
15183. Which of the following is resistant to the action of both heat & chemicals ?
15184. Metallic surveying tapes are made of __________ which has a low co-efficient of expansion & enough strength.
15185. Which of the following is a unit of time ?
15186. __________ furnace is generally used in the non-ferrous foundaries.
15187. Steel & cast iron pipes are produced by __________ casting.
15188. The taper provided on pattern for its easy & clean withdrawal from the mould is termed as the __________ allowance.
15189. Gas turbine normally employs a constant __________ cycle.
15190. Which of the following relationships is correct for relating the three elastic constants of an isotropic elastic material (where, E = Young's modulus, G = Modulus of rigidity or shear modulus v = Poisson's ratio) ?
15191. Electrostatic separation of minerals from each other is based on their differences in the following property.
15192. Natural water contains approximately __________ percent of heavy water.
15193. The minimum temperature to which the water can be cooled in a cooling tower is the __________ temperature of air.
15194. The order of a chemical reaction
15195. Which of the following heavenly bodies do not belong to the solar system?
15196. The chief component of liquefied petroleum gas is
15197. For efficient performance of a blast furnace, the extent of reduction of Wustite (FeO) should be
15198. Identify the false statement
15199. __________ can replace tungsten in high speed steel.
15200. Production of one ton of paper in Indian paper industry consumes about __________ kWh of electricity.