A perfect gas at 27 C is heated at constant pressure as to trible its volume the temperature of the gas will be
1.81 deg C
2. 270 deg C
3. 627 deg C
4.900 deg C
An example of a water tube boiler is a
1.Locomotive boiler
2.Lancashire boiler
3.Babcock-Wilcox boiler
4.Cochran boiler
During tensile testing on a specimen cup and cone formation is observed with
1.cast iron
2.cast steel
3.mild steel
4.glass
For large power production, it is economical to set up
1. diesel plants
2.steam power plants
3.gas turbines
4.hydro-electric plants
In a pertrol engine the theoretical ratio of air to fuel is approximately
1.3:1
2.5:1
3.15:1
4.30:1
In our state a super thermal power station is located at
1.Hyderabad
2.Vijayawada
3.Nellore
4.Ramagundam
The equipment used for transporting material horizontally as well as vertically which saves labour cost is
1.trucks
2.car dumper
3.trailers
4.conveyors
The inlet valve in a 4 stroke IC engine opens
1.after TDC
2.before BDC
3. before TDC
4.after BDC
The kinetic energy of a body of a mass 2kg, when it falls in air from rest through a height of 5 m is
1.98.1 J
2. 9.8 Nm
3.10 n
4. 20 j
The operation chart indicates
1. method of assembly
2.sequence of operation
3.times for each operation
4.layout of machines
The thermo dynamic cycle used in a petrol engine is the
1.constant pressure cycle
2.Carnot cycle
3.Rankine cycle
4.constant volume cycle
A 4 cylinder 4 stroke diesel engine has 3000 power strokes per minute; its speed in RPM is
1.3000
2.6000
3.750
4.1500
A 4 stroke 2 cylinder deisel engine has an IMEP of 4 bar and a mechanical efficiency of 80 per cent, the brake mean effective pressure is
1.3.2 bar
2.5.0 bar
3.6.4 bar
4.2.5 bar
An aircraft gas turbine operates on
1.Sterling cycle
2. Bryton cycle
3.Rankine cycle
4.Otto cycle
An example of a water tube boiler is a
1.Locomotive boiler
2.Lancashire boiler
3.Babcock-Wilcox boiler
4.Cochran boiler
An example of a water tube boiler is a A. B. C. D.
1.Locomotive boiler
2.Lancashire boiler
3.Babcock-Wilcox boiler
4.Cochran boiler
Chunk used on turret lathe is
1.Four jaw self centering chunk
2.Collect chunk
3.Three jaw independent chunk
4.Magnetic chunk
First law of the thermodynamics deals with conversation of
1.mass
2.heat
3.momentum
4.energy
For chain drives the small sprockets should have a minimum number of teeth of
1.17
2.25
3.27
4.31
For comfort air conditioning the conditions maintained are
1.15 deg dbt to 20 deg Wbt
2.25 deg dbt to 60 % RH
3.40 deg dbt and 40 deg Wbt
4.25 deg dbt and 80 % RH
For the purpose of comparison, the steam generating capacity of a boiler is generally expressed in terms of
1.equivalent evaporation
2. kg/hr
3.steam pressure
4. thermal efficiency
For transmitting power without slip one of the following drives is used
1.belt drives
2.rope drives
3.cone pulleys
4.chain drives
he cost of lubricating oils in a machine shop may be classified as
1.direct material cost
2.prime cost
3.factory overhead cost
4.administrative overhead cost
High carbon steel has a carbon content of
1.1 to 3 %
2.0.5 to 1 %
3.0.8 to 2 %
4.2 to 4 %
In a six cylinder 4 stroke petrol engine running at 2000 RPM, the cam shaft runs at
1.1000 RPM
2. 2000 RPM
3. 6000 RPM
4. 500 RPM
In an inpulse turbine the velocity of steam remains constant in the
1.nozzles
2.moving blades
3.fixed blades
4.casing
Indicated thermal efficiency of an engine is
1. Brake power/Indicated power
2. Indicated power/Mechanical efficiency
3.Brake thermal efficiency/Mechanical efficiency
4.Brake power/Mechanical efficiency
One of the following methods is adopted for governing of steam turbines in a power plant
1.hit and miss governing
2.blow off in boile
3. throtle governing
4.speed control
One of the following type of pumps is used in a diesel engine
1. jet pump
2.reciprocating pump
3.gear pump
4.axial flow pump
Parson's turbine is an example of a
1. impulse turbine
2.reaction turbine
3.radial flow turbine
4.water turbine
Standard data used in work study is a
1.table of time required for various jobs
2. catalogue of material properties
3. table of cost of components
4.catalogue of elemental time standard
Super heated steam at 20 bar enters a nozzle, for maximum discharge the throat pressure should be A. 16 barB. C. 10 barD.
1.16 bar
2.10.92 bar
3.10 bar
4.11.6 bar
The angular speed of watt governor, when its height is 98 mm is equal to
1.10 rad/s
2.9.8 rad/s
3. 98 rad/s
4.5 rad/s
The approximate air fuel ratio in a diesel engine under rated conditions is
1.12 to 1
2.20 to 1
3.15 to 11
4.80 to 1
The area under pressure volume curve of any thermodynamic process represents
1.heat rejected only
2.heat absorbed only
3.heat absorbed and rejected
4.work done
The gudgeion pin connects the
1.connecting rod and the crank
2.piston and crank
3.crank and connecting rod
4.piston and the connecting rod
The number of valves in a two stroke engine is
1.0
2.1
3.2
4.4
Two stroke IC engines are commonly used in 2 wheelers because the
1.power to weight ratio is high
2. thermal efficiency is high
3.lube oil consumption is less
4. cnoise is less
When water at atmospheric pressure is heated from 40 deg to 80 deg, the heat absorbed is
1.sensible heat
2.latent heat
3.super heat
4.specific heat
Which one of the following is a boiler mounting?
1.fusible plug
2. super heater
3.economiser
4.chimney