Related Questions
What is the correct answer?
4
The maximum thickness of the metal which can be welded using ultrasonic welding is __________ mm.
What is the correct answer?
4
Basic open hearth furnace (BOF) is not used for producing __________ steel.
What is the correct answer?
4
Nitriding of a steel part does not increase its
What is the correct answer?
4
Increasing the carbon content of steel
A. Reduces the upper shelf energy
B. Increasing the ductility transition temperature
What is the correct answer?
4
Blast furnace slag is mainly molten
What is the correct answer?
4
Carbon is present in the form of __________ in grey cast iron.
B. Nodular aggregates of graphite
What is the correct answer?
4
Euler number is defined as the ratio of inertia force to __________ force.
What is the correct answer?
4
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.
What is the correct answer?
4
Which of the following is not a characteristic observed in material failure by fatigue fracture?
A. Plastic deformation of material does not occur
B. Initiation of crack from below the surface does not occur
C. Initiation of crack occurs on the surface of the machine part
D. Presence of both rough & smooth zone with conchoidal markings in smooth zone of the surface
What is the correct answer?
4
Which of the following performance characteristics of a S.I engine is not affected by the front end volatility of the petrol used?
What is the correct answer?
4
Two solutions A1 & A2 have pH value of 2 & 6 respectively. It implies that the solution
A. A1 is more alkaline than solution A2
C. A2 is very slightly acidic
What is the correct answer?
4
Which of the following is the most suitable material of construction for the condenser tubes, where the cooling medium is brine (salty water)?
What is the correct answer?
4
The heat treatment to which the steel wire containing > 0.25% carbon is subjected to is
What is the correct answer?
4
Pick out the wrong statement.
A. Weldability of high carbon steel is poorer compared to low carbon steel
B. Invar is a magnetic alloy
C. Magnetic permeability of the diamagnetic material is less than one
D. Martenistic transformation never goes to completion (i.e., 100%) at room temperature
What is the correct answer?
4
Work required for compression of a gas contained in a cylinder is 7000 kJ. During compression, heat interaction of 3000 kJ causes the surroundings to be heated. Internal energy change of the gas during the compression is __________ kJ.
What is the correct answer?
4
Thermal diffusivity of a substance is proportional to (where, k = Thermal conductivity)
What is the correct answer?
4
Glycerine is used as a coolant in cooling of some engines instead of water, because
A. Its higher boiling point (290°C) increases its heat carrying capacity
B. Comparatively less weight of coolant is required
C. Smaller radiator can be used
What is the correct answer?
4
Stainless steel is welded using
What is the correct answer?
4
Drills are usually made of
What is the correct answer?
4
Velocity of a gas in sound is not proportional to (where, T = Absolute temperature of the gas. P = Absolute pressure of the gas. y = Ratio of specific heats (Cp/Cv) ρ = specific weight of the gas)
What is the correct answer?
4
A material being tested for endurance strength is subjected to the __________ load.
What is the correct answer?
4
Magnetic permeability of iron is increased by its
D. Alternate heating & cooling
What is the correct answer?
4
The taper provided on pattern for its easy & clean withdrawal from the mould is termed as the __________ allowance.
What is the correct answer?
4
The refrigerant freon-12 is chemically
What is the correct answer?
4
Use of water as a manometric liquid suffers from the disadvantage of its
What is the correct answer?
4
Work done by a/an __________ process is determined by ∫p. dv
What is the correct answer?
4
Friction factor for fluid flow in pipe does not depend upon the
C. Fluid density & viscosity
D. Mass flow rate of fluid
What is the correct answer?
4
For infinite parallel planes having emissivities ε1 & ε2, the interchange factor for radiation from surface 1 to surface 2 is given by
What is the correct answer?
4
Which of the following can be manufactured using powder metallurgy techniques?
What is the correct answer?
4
Which of the following is the largest quantum of pressure?