101. In which case the air-fuel ratio is likely to be maximum _________________?
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A. 2-stroke engine

B. 4-stroke diesef engine

C. 4-stroke petrol engine

D. gas turbine

E. multi-cylinder engine

102. Water gas is produced by ___________________ ?
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A. passing air and a large amount of steam over waste coal at about 65C

B. same way as the natural gas

C. passing steam over incandescent coke

D. carbonisation of coal

E. partial combustion of caol, eke, anthractie coal or charcoal in a mixed air steam blast

103. A compressor at high altitude will draw________________?
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A. same power

B. none of the above

C. more/less power depending on other factors

D. less power

E. more power

104. In centrifugal pumps, maximum efficiency is obtained when the blades are_________________?
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A. given aerofoil section

B. radial

C. bent forward

D. bent backward

E. straight

105. In jet engines the compression ratio__________________?
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A. Varies linearly to the speed

B. is constant irrespective of variation in speed

C. varies as square of the speed

D. varies as square root of the speed

E. varies as cube of the speed

106. In a single casing, multistage pump running at constant speed, the capacity rating is to be slightly lowered. It can be done by_______________?
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A. none of the above

B. not possible

C. designing new impeller

D. some other alterations in the impeller

E. trimming the impeller size to the required size by machining
107. According to fan laws, for the fans having constant wheel diameters, the power demand varies_______________?
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A. none of the above

B. square root of fan speed

C. cube of fan speed

D. square of fan speed

E. directly as fan speed

108. In fast breeder reactors___________________?
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A. moderator may or may not be used

B. graphite is used as the moderator

C. any type of moderator can be used

D. moderator is dispensed with

E. heavy water is used as the moderator

109. Runaway speed of a hydraulic turbine is_________________?
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A. the speed corresponding to maximum overload permissible

B. none of the above.

C. the speed if the turbine runner is allowed to revolve freely without load and with the wicket gates wide open

D. the speed at which turbine runner will be damaged

E. full load speed

110. Boiling water reactor employs__________________?
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A. double circuit system of coolant cycle

B. boiler

C. multi pass system

D. single circuit system

E. direct cycle of coolant system
111. The number of isotopes of hydrogen are _________________?
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A. 0

B. U

C. 1

D. 2

E. 3
112. Gas turbine works on_______________?
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A. Rankine cycle

B. Carnot cycle

C. Joule cycle

D. Brayton or Atkinson cycle

E. Erricsson cycle

113. Atomic number of an element in the periodic table represents the numbers of_________________?
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A. protons in the nucleus

B. electrons in the atom

C. electrons in me nucleus

D. neutrons in the atom

E. neutrons in the nucleus

114. Lancing is the operation of _________________?
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A. cutting a sheet of metal in a straight line along the length

B. bending a sheet of metal along a curved axis

C. removal of metal to the desired shape from the edge of a plate

D. cutting a sheet of metal through part of its length and then bending the cut portion
115. The work ratio of a gas turbine plant is defined as the ratio of__________________?
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A. actual heat drop and isentropic heat drop

B. net work output and heat supplied (6) net work output and work done by turbine

C. isentropic increase/drop in temperature and actual increase/ drop in temperature

D. net work output and isentropic heat drop
116. Multistage centrifugal pumps are used to obtain___________________?
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A. high discharge

B. pumping of viscous fluids

C. high head

D. high efficiency

E. high head and high discharge

117. The blades of gas turbine are made of_________________?
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A. high nicket alloy (neimonic)

B. stainless steel

C. mild steel

D. carbon steel

E. high alloy seel

118. U235 will undergo fission by__________________?
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A. none of the above

B. medium energy neutrons

C. low energy (slow) neutrons alone

D. either fast or slow neutrons

E. high energy (fast) neutrons alone

119. Amongst the following, the fissionable materials are________________?
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A. U238andPu239

B. U235andPu235

C. U243andPu235

D. U23iandPu233

E. U233andPu239
120. Work ratio of a gas turbine may be improved by f____________________?
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A. increasing the turbine work

B. A. and C. above

C. decreasing the turbine work

D. decreasing the compression work

E. increasing the compression work

121. Which of the following are ferrite materials__________________?
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A. U238andTh239

B. none of the above

C. U233andPu239

D. U238andPu239

E. U
122. Maximum temprature in a gas turbine is of the order of COMPRESSORS, GAS TURBINES AND JET ENGINES______________________?
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A. 1000C

B. 1500C

C. 2000C

D. 2500C

E. 700C
123. In reaction turbine, draft tube is used_____________________?
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A. to transport water downstream without eddies

B. to increase flow rate

C. to convert the kinetic energy to flow energy by a gradual expansion of the flow cross-section

D. for safety of turbine

E. none of the above

124. The fuel consumption in gas turbines is accounted for by___________________?
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A. low.er heating value

B. highest calorific value

C. higher calorific value

D. heating value

E. higher heating value

125. According to fan laws, at constant pressure, the speed capacity and power vary_________________?
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A. directly as the air or gas density

B. inversely as square root of density

C. as square root of density

D. as square of density

E. inversely as density

126. Diffuser in a compressor is used to _____________________?
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A. convert pressure energy into kinetic energy

B. convert kinetic energy into pressure energy

C. increase degree of reaction

D. increase velocity

E. make the flow stream-line

127. As the value of index is decreased, the volumetric efficiency will___________________?
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A. increase

B. remain unaffected

C. decrease

D. may increase/decrease depending on compressor clearance

E. none of the above

128. Rotary compressors are suitable for ____________________?
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A. large discharge at high pressure

B. low discharge at low pressure

C. large discharge at low pressure

D. low discharge at high pressure

E. there is no such limitation

129. Specific speed for reaction turbines ranges from___________________?
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A. 0 to 4.5

B. 80 to 200

C. 10 to 100

D. none of the above

E. 250 to 300

130. Turbo propeller has the following additional feature over the turbojet __________________?
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A. diffuser

B. peopeller

C. intercooler

D. starting engine

E. turbine and combustion chamber

131. Any change in load is adjusted by adjusting following parameter on turbine______________?
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A. blade velocity

B. absolute velocity

C. flow

D. net head

E. relative velocity of flow at inlet

132. A hydraulic accumulator normally consists of________________?
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A. two co-axial rams and two cylinders

B. special type of pump with storage device and a pressure regulator

C. a cylinder and a ram

D. two cylinders, two rams and a storage device

E. a cylinder, a piston, storage tank and control valve

133. Reciprocating pumps are no more to be seen in industrial applications (in comparison to centrifugal pumps) because of____________________?
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A. lower discharge

B. lower speed of operation

C. all of the above

D. high initial and maintenance cost

E. necessity of air vessel

134. The main purpose of reheating in gas turbine is to__________________?
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A. reduce turbine size

B. increase speed

C. increase pressure ratio

D. increase power output

E. increase temperature

135. A gas turbine used in air craft should have______________________?
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A. high h.p. and low weight

B. high speed and high h.p.

C. small frontal area and high h.p.

D. all of the above

E. low weight and small frontal area
136. Actual compression curve is___________________?
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A. same as isothermal

B. none of the above

C. better than isothermal and adiabatic

D. in between isothermal and adiabatic

E. same as adiabatic

137. When a piping system is made up primarily of friction head and very little of vertical lift, then pump characteristics should be__________________?
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A. nearly horizontal

B. first rise and then fall

C. horizontal

D. steep

E. none of the above

138. In a centrifugal pump casing, the flow of water leaving the impeller, is___________________?
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A. free vortex motion

B. none of the above

C. radial flow

D. forced vortex

E. rectilinear flow

139. Reheating in gas turbine results in___________________?
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A. increase of work ratio

B. decrease of thermal efficiency

C. decrease of work ratio

D. both A. and B. above

E. both B. and C. above

140. Propulsion efficiency of the following order-is obtained in practice _______________?
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A. 60%

B. 50%

C. 85%.

D. 34%

E. 72%

141. A turbine pump is basically a centrifugal pump equipped additionally with_________________?
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A. totally submerged operation facility

B. backward curved blades

C. adjustable blades

D. vaned diffusion casing

E. inlet guide blades

142. When a piping system is made up primarily of vertical lift and very little pipe friction, the pump characteristics should be _________________?
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A. horizontal

B. steep

C. first rise and then fall

D. nearly horizontal

E. none of the above

143. For a two stage compressor* if index of compression for higher stage is greater than index of compression for lower stage, then the optimum pressure as compared to ideal case will___________________?
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A. other factors control it

B. decrease

C. unpredictable

D. increase

E. remain unaffected

144. Propulsive efficiency is defined as ratio of___________________?
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A. propulsive power and fuel input

B. none of the above

C. engine output and propulsive power

D. thrust power and propulsive power

E. thrust power and fuel energy

145. The indicated work per unit mass of air delivered is___________________?
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A. not affected by clearance volume

B. greatly affected by clearance volume

C. directly proportional to clearance volume

D. inversely proportional to clearance volume

146. For starting an axial flow pump, its delivery valve should be____________________?
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A. could be either open or closed

B. depends on starting condition and flow desired

C. partly open and partly closed

D. closed

E. open
147. Which of the following fuels can be used in turbojet engines _____________________?
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A. kerosene

B. demethylated spirit

C. methyl alcohol

D. liquid hydrogne

E. high speed diesel oil

148. Axial flow compressor has the following advantage over centrifugal compressor__________________?
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A. higher average velocities

B. aerofoil blades are used

C. higher pressure ratio per stage

D. none of the above

E. larger air handling ability per unit frontal area
149. The nuclear power plant at Tarapur has the following reactor________________?
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A. pressurised water

B. none of the above

C. fast breeder

D. sodium graphite

E. boiling water
150. Reflector in nuclear plants is used to________________?
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A. shield the radioactivity completely

B. check polllution

C. return the neutrons back into the core

D. is not used

E. conserve energy