Q.1
Which of the following is not a natural abrasive?
Q.2
__________ stress can not be sustained by a fluid in equilibrium.
Q.3
Needles are produced by
Q.4
A coal with high __________ content will ignite most easily.
Q.5
Energy of the sun arises mainly from __________ reactions.
Q.6
The specific gravity of coal depends mainly on its __________ content.
Q.7
A __________ type pressure sensing element is commonly used in aneroid barometer.
Q.8
Heat treatment of steel is done to mainly change its __________ properties.
Q.9
Current employed in resistance welding ranges from __________ kVA/cm² .
Q.10
High relative humidity decreases the evaporative process and as the temperature is increased, the relative humidity decreases. The comfort range for human body is the ambient temperature of 22 to 27°C with relative humidity ranging from __________ percent.
Q.11
All radiations falling on a black body are
Q.12
A furnace is made of a refractory brick wall of thickness 0.5 metre and thermal conductivity 0.7 W/m.°K For the same temperature drop and heat loss, this refractory wall can be replaced by a layer of diatomaceous earth of thermal conductivity 0.14 W/m.K and thickness __________ metre.
Q.13
Large scale fire on fuel gas line is normally extinguished by
Q.14
For the running of power generating turbines, the steam used should be
Q.15
The material used for coating the welding electrode is termed as the
Q.16
__________ has the highest melting point out of the following.
Q.17
The __________ of a double acting reciprocating pump as compared to the single acting pump will be almost double.
Q.18
Which of the following accounts for maximum loss of energy in a coal fired boiler?
Q.19
An ideal material for making cooking vessels should have
Q.20
No cutting fluid is normally used, while machining
Q.21
Fatigue strength of a metal is improved by
Q.22
Theoretical volume of oxygen required for complete combustion of 1Nm³ of acetylene, in oxy-acetylene welding is __________ Nm³ .
Q.23
Annealing of a material does not
Q.24
Dislocation cross-slip is difficult in those materials, which have
Q.25
The most economical channel section for the fluid flow is the one for which the discharge is maximum for a given cross-sectional area. Vertical velocity distribution in an open channel for laminar flow can be assumed to be
Q.26
Which of the, following is not associated with the functioning of a petrol engine ?
Q.27
With increasing carbon percent in steel beyond 0.8%, its ultimate tensile strength (UTS) and __________ is not affected.
Q.28
In a neutral solution
Q.29
In an isochoric process,
Q.30
Drossing is a __________ operation.
Q.31
Grinding wheel made of silicon carbide is most suitable for grinding materials of low tensile strength (e.g; tough bronze). Grinding is a __________ operation.
Q.32
In hot working, dynamic recovery occurs in
Q.33
Leakage in a cooking gas cylinder is detected by
Q.34
Multistage compression is necessary for high efficiency,
Q.35
__________ the exhaust gas is an indication of the incomplete combustion of fuel.
Q.36
The softness or hardness of a grinding wheel depends upon the type & amount of bonding material used. For general purpose cutter grinding __________ grinding wheel is normally used.
Q.37
Which of the following fastening devices has a head at one end and a nut fitted to the other?
Q.38
Evaporative cooling process employs a combination of cooling and humidification in which the
Q.39
The passage between the nozzle and the __________ is called 'sprue' in case of injection moulding.
Q.40
Heat dissipation in cooling towers is mainly by
Q.41
The boiling & freezing points on a newly defined temperature scale in degree 'D' are 400°D & 100°D respectively. The temperature reading corresponding to 60°C on this new temperature scale will be equal to __________ °D.
Q.42
Presence of sulphur in the fuel fired in a furnace
Q.43
__________ furnace is generally used in the non-ferrous foundaries.
Q.44
'Amortization' in respect of financial obligation of a company means the
Q.45
In an amorphous material, atoms defy any definite atomic structure and exist in random pattern just like in liquid. Which of the following is an amorphous material?
Q.46
Glycerene is used as a coolant in cooling of some engines instead of water, because
Q.47
Difference at any instant between the value of the controlled variable and the set point is called the
Q.48
Addition of silicon to aluminium improves its
Q.49
In continuous casting of liquid steel, the mould is made of
Q.50
Which of the following has the highest modulus of elasticity (about 7 x 10⁶ kg/cm²) ?
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