In a hydrodynamic lubricated bearing

there is a thin film of lubricant between the journal and the bearing

there is a thick film of lubricant between the journal and the bearing

there is a thin film of lubricant between the journal and the bearing

there is no lubricant between the journal and the bearing

the lubricant is forced between the journal and the bearing, by external pressure

Which of the following statement is correct for a compound steam engine ?

The temperature range per cylinder is increased, with corresponding increase in condensation.

The cost of the engine, for the same power and economy, is more than that of a simple steam engine.

The forces in the working parts are increased as the forces are distributed over more parts.

The ratio of expansion is reduced, thus reducing the length of stroke.

The temperature range per cylinder is increased, with corresponding increase in condensation.

The cylinder dimensions of a compound engine may be designed on the basis of

equal power developed in each cylinder for uniform turning moment

equal initial piston loads on all pistons for obtaining same size of piston rod, connecting rod etc. for all cylinders

equal temperature drop in each cylinder for economy of steam

The function of a piston rod is

to convert heat energy of the steam into mechanical work

to guide motion of the piston rod and to prevent it from bending

to transfer motion from the piston to the cross head

to convert heat energy of the steam into mechanical work

to exhust steam from the cylinder at proper moment

In a reaction turbine, the draft tube is used

to transport water to downstream

to prevent air to enter the turbine

to increase the head of water by an amount equal to the height of the runner outlet above the tail race

to transport water to downstream

The overall efficiency of a reaction turbine is the ratio of

actual work available at the turbine to the energy imparted to the wheel

power produced by the turbine to the energy actually supplied by the turbine

actual work available at the turbine to the energy imparted to the wheel

workdone on the wheel to the energy (or head of water) actually supplied to the turbine

The object of producing draught in a boiler is

to provide an adequate supply of air for the fuel combustion

to exhaust the gases of combustion from the combustion chamber

to discharge the gases of combustion to the atmosphere through the chimney

In water tube boilers

the flames and hot gases pass through the tubes which are surrounded by water

water passes through the tubes which are surrounded by flames and hot gases

the flames and hot gases pass through the tubes which are surrounded by water

The mechanical efficiency of an impulse turbine is

ratio of the Work done on the wheel to the energy of the jet

ratio of the actual power produced by the turbine to the energy actually supplied by the turbine

ratio of the actual work available at the turbine to the energy imparted to the wheel

ratio of the Work done on the wheel to the energy of the jet

A push broach as compared to pull broach

removes less material for each pass of the tool

When the cutting edge of the tool is dull, then during machining

continuous chips with built-up edge are formed

The type of organisation preferred for a steel industry, is

line, staff and functional organisation

Work sampling is applied for

estimation of the percentage utilisation of machine tools

estimating the percentage of the time consumed by various job activities

finding out time standards, specially where the job is not repetitive and where time study by stop watch method is not possible

4791 + Mcqs in Mechanical Engineering in Engineering Page 4 McqOptions

151.	According to Guest's theory, the failure occurs at a point in a member when the maximum shear stress in a bi-axial stress system reaches the shear stress at elastic limit in simple tension test.
A.	True
B.	False
Answer» B. False

Discussion

152.	For maximum power, the velocity of the belt will be
A.	<img src="/_files/images/mechanical-engineering/machine-design/588-388-1.png">
B.	<img src="/_files/images/mechanical-engineering/machine-design/588-388-2.png">
C.	<img src="/_files/images/mechanical-engineering/machine-design/588-388-3.png">
D.	none of these
Answer» D. none of these

Discussion

153.	A draught produced by a chimney due to the difference of densities between the hot gases inside the chimney and cold atmospheric air outside it, is called natural draught.
A.	Yes
B.	No
Answer» B. No

Discussion

154.	La-mont boiler, is a high pressure water tube steam boiler working on forced circulation.
A.	Agree
B.	Disagree
Answer» B. Disagree

Discussion

155.	Loeffler boiler is a water tube boiler using a forced circulation of water.
A.	True
B.	False
Answer» B. False

Discussion

156.	In a hydrodynamic lubricated bearing
A.	there is a thick film of lubricant between the journal and the bearing
B.	there is a thin film of lubricant between the journal and the bearing
C.	there is no lubricant between the journal and the bearing
D.	the lubricant is forced between the journal and the bearing, by external pressure
Answer» B. there is a thin film of lubricant between the journal and the bearing

Discussion

157.	The function of a connecting rod is not to convert reciprocating motion of the piston into rotary motion.
A.	True
B.	False
Answer» C.

Discussion

158.	Which of the following statement is correct for a compound steam engine ?
A.	The cost of the engine, for the same power and economy, is more than that of a simple steam engine.
B.	The forces in the working parts are increased as the forces are distributed over more parts.
C.	The ratio of expansion is reduced, thus reducing the length of stroke.
D.	The temperature range per cylinder is increased, with corresponding increase in condensation.
Answer» D. The temperature range per cylinder is increased, with corresponding increase in condensation.

Discussion

159.	When the speed of the crankshaft is between 100 r.p.m. and 250 r.p.m., the engine said to be a
A.	slow speed engine
B.	medium speed steam engine
C.	high speed steam engine
D.	none of these
Answer» C. high speed steam engine

Discussion

160.	The shell diameter of a Locomotive boiler is
A.	1 m
B.	1.5 m
C.	2 m
D.	2.5 m
Answer» C. 2 m

Discussion

161.	The function of a crosshead is to guide motion of the __________ and to prevent it from bending.
A.	piston rod
B.	connecting rod
C.	eccentric rod
D.	valve rod
Answer» B. connecting rod

Discussion

162.	The cylinder dimensions of a compound engine may be designed on the basis of
A.	equal power developed in each cylinder for uniform turning moment
B.	equal initial piston loads on all pistons for obtaining same size of piston rod, connecting rod etc. for all cylinders
C.	equal temperature drop in each cylinder for economy of steam
D.	all of the above
Answer» E.

Discussion

163.	The function of a piston rod is
A.	to guide motion of the piston rod and to prevent it from bending
B.	to transfer motion from the piston to the cross head
C.	to convert heat energy of the steam into mechanical work
D.	to exhust steam from the cylinder at proper moment
Answer» C. to convert heat energy of the steam into mechanical work

Discussion

164.	The ratio of actual work available at the turbine to the energy imparted to the wheel is known as __________ efficiency.
A.	hydraulic
B.	mechanical
C.	overall
Answer» C. overall

Discussion

165.	The draught produced by a steam jet issuing from a nozzle placed in the ashpit under the fire grate of the furnace is called
A.	induced steam jet draught
B.	chimney draught
C.	forced steam jet draught
D.	none of these
Answer» D. none of these

Discussion

166.	The static head of a centrifugal pump is equal to the __________ of suction head and delivery head.
A.	product
B.	difference
C.	sum
Answer» D.

Discussion

167.	A ship with jet propulsion draws water through inlet orifices at right angles to the direction of its motion. The propelling force of the jet is (where a = Area of the jet, V_r = Relative velocity of the jet and ship = V + v, v = Velocity of the ship, and V = Velocity of the jet issuing from the ship)
A.	<img src="/_files/images/mechanical-engineering/hydraulic-machines/191-10-1.png">
B.	<img src="/_files/images/mechanical-engineering/hydraulic-machines/191-10-2.png">
C.	<img src="/_files/images/mechanical-engineering/hydraulic-machines/191-10-3.png">
D.	<img src="/_files/images/mechanical-engineering/hydraulic-machines/191-10-4.png">
Answer» C. <img src="/_files/images/mechanical-engineering/hydraulic-machines/191-10-3.png">

Discussion

168.	In a reaction turbine, the draft tube is used
A.	to run the turbine full
B.	to prevent air to enter the turbine
C.	to increase the head of water by an amount equal to the height of the runner outlet above the tail race
D.	to transport water to downstream
Answer» D. to transport water to downstream

Discussion

169.	The power produced by the reaction turbine is __________ to the head of water.
A.	directly proportional
B.	inversely proportional
Answer» B. inversely proportional

Discussion

170.	In a reciprocating pump, air vessels are fitted to the suction pipe and delivery pipe close to the cylinder of the pump.
A.	True
B.	False
Answer» B. False

Discussion

171.	A centrifugal pump will start delivering liquid only when the pressure rise in the impeller is equal to the
A.	kinetic head
B.	velocity head
C.	manometric head
D.	static head
Answer» D. static head

Discussion

172.	The speed ratio of a Francis turbine is defined as the ratio of the theoretical jet velocity to the peripheral speed at inlet.
A.	Yes
B.	No
Answer» C.

Discussion

173.	The overall efficiency of a reaction turbine is the ratio of
A.	power produced by the turbine to the energy actually supplied by the turbine
B.	actual work available at the turbine to the energy imparted to the wheel
C.	workdone on the wheel to the energy (or head of water) actually supplied to the turbine
D.	none of the above
Answer» B. actual work available at the turbine to the energy imparted to the wheel

Discussion

174.	Work done by a turbine __________ upon the weight of water flowing per second.
A.	depends
B.	does not depend
Answer» B. does not depend

Discussion

175.	The object of producing draught in a boiler is
A.	to provide an adequate supply of air for the fuel combustion
B.	to exhaust the gases of combustion from the combustion chamber
C.	to discharge the gases of combustion to the atmosphere through the chimney
D.	all of the above
Answer» E.

Discussion

176.	In a glass tube type water indicator for a boiler, one end of the tube is connected to water space and the other end is connected to
A.	water space also
B.	chimney
C.	steam space
D.	superheater
Answer» D. superheater

Discussion

177.	In water tube boilers
A.	water passes through the tubes which are surrounded by flames and hot gases
B.	the flames and hot gases pass through the tubes which are surrounded by water
C.	forced circulation takes place
D.	none of these
Answer» B. the flames and hot gases pass through the tubes which are surrounded by water

Discussion

178.	A grate, in a boiler, is a place in the combustion chamber upon which fuel (wood or coal) is burnt.
A.	True
B.	False
Answer» B. False

Discussion

179.	The mechanical efficiency of an impulse turbine is
A.	ratio of the actual power produced by the turbine to the energy actually supplied by the turbine
B.	ratio of the actual work available at the turbine to the energy imparted to the wheel
C.	ratio of the Work done on the wheel to the energy of the jet
D.	none of the above
Answer» C. ratio of the Work done on the wheel to the energy of the jet

Discussion

180.	The overshot water wheels are those in which the wheel runs entirely by the __________ of water.
A.	weight
B.	impulse
Answer» B. impulse

Discussion

181.	Drilling is an example of
A.	orthogonal cutting
B.	oblique cutting
C.	simple cutting
D.	uniform cutting
Answer» C. simple cutting

Discussion

182.	The tool made of cemented carbide wear out faster at
A.	slow speeds
B.	medium speeds
C.	fast speeds
D.	very fast speeds
Answer» B. medium speeds

Discussion

183.	The silicon carbide abrasive is chiefly used for grinding
A.	cemented carbide
B.	ceramic
C.	cast iron
D.	all of these
Answer» E.

Discussion

184.	A round nose tool may be fed eitner from left to right end or from right to left end of the lathe bed.
A.	Yes
B.	No
Answer» B. No

Discussion

185.	A push broach as compared to pull broach
A.	has less number of teeth
B.	is short and stocky
C.	removes less material for each pass of the tool
D.	all of the above
Answer» E.

Discussion

186.	When the cutting edge of the tool is dull, then during machining
A.	continuous chips are formed
B.	discontinuous chips are formed
C.	continuous chips with built-up edge are formed
D.	no chips are formed
Answer» D. no chips are formed

Discussion

187.	Linear programming model can be applied to line balancing problem and transportation problem.
A.	True
B.	False
Answer» B. False

Discussion

188.	The chart which gives an estimate about the amount of materials handling between various work stations is known as
A.	flow chart
B.	process chart
C.	travel chart
D.	operation chart
Answer» D. operation chart

Discussion

189.	The type of organisation preferred for a steel industry, is
A.	line organisation
B.	functional organisation
C.	line and staff organisation
D.	line, staff and functional organisation
Answer» E.

Discussion

190.	The procedure of modifying work content to give more meaning and enjoyment to the job by involving employees in planning, organisation and control of their work, is termed as
A.	job enlargement
B.	job enrichment
C.	job rotation
D.	job evaluation
Answer» C. job rotation

Discussion

191.	Bar chart is suitable for
A.	large project
B.	major work
C.	minor work
D.	all of these
Answer» D. all of these

Discussion

192.	Fixed position layout is also known as
A.	analytical layout
B.	synthetic layout
C.	static product layout
D.	none of these
Answer» D. none of these

Discussion

193.	In a network shown in the below figure, the critical path is along
A.	1-2-3-4-8-9
B.	1-2-3-5-6-7-8-9
C.	1-2-3-4-7-8-9
D.	1-2-5-6-7-8-9
Answer» C. 1-2-3-4-7-8-9

Discussion

194.	The bending moment at a point on a beam is the algebraic __________ of all the moments on either side of the point.
A.	sum
B.	difference
Answer» B. difference

Discussion

195.	Work sampling is applied for
A.	estimation of the percentage utilisation of machine tools
B.	estimating the percentage of the time consumed by various job activities
C.	finding out time standards, specially where the job is not repetitive and where time study by stop watch method is not possible
D.	all of the above
Answer» E.

Discussion

196.	When two main plates are kept in alignment butting each other and riveted with cover plate on both sides of the main plates with two rows of rivets in each main plate, the joint is known as __________ double cover butt joint.
A.	single riveted
B.	double riveted
Answer» C.

Discussion

197.	Whenever a material is loaded within elastic limit, stress is __________ strain.
A.	equal to
B.	directly proportional to
C.	inversely proportional to
Answer» C. inversely proportional to

Discussion

198.	When a bar is cooled to - 5 C, it will develop
A.	no stress
B.	shear stress
C.	tensile stress
D.	compressive stress
Answer» D. compressive stress

Discussion

199.	A load which is spread over a beam in such a manner that it varies uniformly over the whole length of abeam is called uniformly __________ load.
A.	distributed
B.	varying
Answer» C.

Discussion

200.	When shear force at a point is zero, then bending moment is __________ at that point.
A.	zero
B.	minimum
C.	maximum
D.	infinity
Answer» D. infinity

Discussion

Explore topic-wise MCQs in Engineering.

According to Guest's theory, the failure occurs at a point in a member when the maximum shear stress in a bi-axial stress system reaches the shear stress at elastic limit in simple tension test.

For maximum power, the velocity of the belt will be

A draught produced by a chimney due to the difference of densities between the hot gases inside the chimney and cold atmospheric air outside it, is called natural draught.

La-mont boiler, is a high pressure water tube steam boiler working on forced circulation.

Loeffler boiler is a water tube boiler using a forced circulation of water.

In a hydrodynamic lubricated bearing

The function of a connecting rod is not to convert reciprocating motion of the piston into rotary motion.

Which of the following statement is correct for a compound steam engine ?

When the speed of the crankshaft is between 100 r.p.m. and 250 r.p.m., the engine said to be a

The shell diameter of a Locomotive boiler is

The function of a crosshead is to guide motion of the __________ and to prevent it from bending.

The cylinder dimensions of a compound engine may be designed on the basis of

The function of a piston rod is

The ratio of actual work available at the turbine to the energy imparted to the wheel is known as __________ efficiency.

The draught produced by a steam jet issuing from a nozzle placed in the ashpit under the fire grate of the furnace is called

The static head of a centrifugal pump is equal to the __________ of suction head and delivery head.

In a reaction turbine, the draft tube is used

The power produced by the reaction turbine is __________ to the head of water.

In a reciprocating pump, air vessels are fitted to the suction pipe and delivery pipe close to the cylinder of the pump.

A centrifugal pump will start delivering liquid only when the pressure rise in the impeller is equal to the

The speed ratio of a Francis turbine is defined as the ratio of the theoretical jet velocity to the peripheral speed at inlet.

The overall efficiency of a reaction turbine is the ratio of

Work done by a turbine __________ upon the weight of water flowing per second.

The object of producing draught in a boiler is

In a glass tube type water indicator for a boiler, one end of the tube is connected to water space and the other end is connected to

In water tube boilers

A grate, in a boiler, is a place in the combustion chamber upon which fuel (wood or coal) is burnt.

The mechanical efficiency of an impulse turbine is

The overshot water wheels are those in which the wheel runs entirely by the __________ of water.

Drilling is an example of

The tool made of cemented carbide wear out faster at

The silicon carbide abrasive is chiefly used for grinding

A round nose tool may be fed eitner from left to right end or from right to left end of the lathe bed.

A push broach as compared to pull broach

When the cutting edge of the tool is dull, then during machining

Linear programming model can be applied to line balancing problem and transportation problem.

The chart which gives an estimate about the amount of materials handling between various work stations is known as

The type of organisation preferred for a steel industry, is

The procedure of modifying work content to give more meaning and enjoyment to the job by involving employees in planning, organisation and control of their work, is termed as

Bar chart is suitable for

Fixed position layout is also known as

In a network shown in the below figure, the critical path is along

The bending moment at a point on a beam is the algebraic __________ of all the moments on either side of the point.

Work sampling is applied for

When two main plates are kept in alignment butting each other and riveted with cover plate on both sides of the main plates with two rows of rivets in each main plate, the joint is known as __________ double cover butt joint.

Whenever a material is loaded within elastic limit, stress is __________ strain.

When a bar is cooled to - 5 C, it will develop

A load which is spread over a beam in such a manner that it varies uniformly over the whole length of abeam is called uniformly __________ load.

When shear force at a point is zero, then bending moment is __________ at that point.