Related Questions
What is the correct answer?
4
Otto cycle efficiency is higher than Diesel cycle efficiency for the same compression ratio and heat input because in Otto cycle
A. Combustion is at constant volume
B. Expansion and compression are isentropic
C. Maximum temperature is higher
D. Heat rejection is lower
What is the correct answer?
4
When a body is subjected to biaxial stress i.e. direct stresses (σx) and (σy) in two mutually perpendicular planes accompanied by a simple shear stress (τxy), then maximum normal stress is
A. (σx + σy)/2 + (1/2) × √[(σx - σy)² + 4 τ²xy]
B. (σx + σy)/2 - (1/2) × √[(σx - σy)² + 4 τ²xy]
C. (σx - σy)/2 + (1/2) × √[(σx + σy)² + 4 τ²xy]
D. (σx - σy)/2 - (1/2) × √[(σx + σy)² + 4 τ²xy]
What is the correct answer?
4
A material obeys hooks law up to
D. Limit of proportionality
What is the correct answer?
4
The capacity of a strained body for doing work on the removal of the straining force, is called
What is the correct answer?
4
A circular shaft fixed at, A has diameter D for half of its length and diameter D/2 over the other half, as shown in the below figure. If the rotation of B relative to A is 0.1 radian, the rotation of C relative to B will be
What is the correct answer?
4
The distillation carried out in such a way that the liquid with the lowest boiling point is first evaporated and recondensed, then the liquid with the next higher boiling point is then evaporated and recondensed, and so on until all the available liquid fuels are separately recovered in the sequence of their boiling points. Such a process is called
C. Fractional distillation
What is the correct answer?
4
Second law of thermodynamics defines
What is the correct answer?
4
If a material expands freely due to heating it will develop
What is the correct answer?
4
The ideal efficiency of a Brayton cycle without regeneration, with increase in pressure ratio will
D. Increase/decrease depending on application
What is the correct answer?
4
The neutral axis of the cross-section a beam is that axis at which the bending stress is
What is the correct answer?
4
The state of a substance whose evaporation from its liquid state is complete, is known as
What is the correct answer?
4
Which of the following cycles has maximum efficiency?
What is the correct answer?
4
A coil is cut into two halves, the stiffness of cut coil will be
What is the correct answer?
4
When the gas is cooled at constant pressure,
A. Its temperature increases but volume decreases
B. Its volume increases but temperature decreases
C. Both temperature and volume increases
D. Both temperature and volume decreases
What is the correct answer?
4
The percentage reduction in area of a cast iron specimen during tensile test would be of the order of
What is the correct answer?
4
Which of the following statement is correct?
A. The stress is the pressure per unit area
B. The strain is expressed in mm
C. Hook's law holds good upto the breaking point
D. Stress is directly proportional to strain within elastic limit
What is the correct answer?
4
In an isothermal process,
A. There is no change in temperature
B. There is no change in enthalpy
C. There is no change in internal energy
What is the correct answer?
4
The oxygen atom is ________ times heavier than the hydrogen atom.
What is the correct answer?
4
The maximum tangential stress in a thick cylindrical shell is always _________ the internal pressure acting on the shell.
What is the correct answer?
4
When two bodies are in thermal equilibrium with a third body, they are also in thermal equilibrium with each other. This statement is called
A. Zeroth law of thermodynamics
B. First law of thermodynamics
C. Second law of thermodynamics
What is the correct answer?
4
An adiabatic process is one in which
A. No heat enters or leaves the gas
B. The temperature of the gas changes
C. The change in internal energy is equal to the mechanical workdone
What is the correct answer?
4
The shape of cantilever for uniformly distributed load will be
What is the correct answer?
4
In closed cycle gas turbine, the air is compressed
What is the correct answer?
4
For the same maximum pressure and temperature,
A. Otto cycle is more efficient than Diesel cycle
B. Diesel cycle is more efficient than Otto cycle
C. Dual cycle is more efficient than Otto and Diesel cycles
D. Dual cycle is less efficient than Otto and Diesel cycles
What is the correct answer?
4
When a bar is cooled to - 5°C, it will develop
What is the correct answer?
4
In a belt drive, the pulley diameter is doubled, the belt tension and pulley width remaining same. The changes required in key will be
D. Double all the dimensions
What is the correct answer?
4
The moment of resistance of a balanced reinforced concrete beam is based on the stresses in
C. Steel and concrete both
What is the correct answer?
4
Which of the following statement is incorrect?
A. The liquid fuels have higher calorific value than solid fuels
B. The solid fuels have higher calorific value than liquid fuels
C. A good fuel should have low ignition point
D. The liquid fuels consist of hydrocarbons
What is the correct answer?
4
A process, in which the gas is heated or expanded in such a way that the product of its pressure and volume remains constant, is called
What is the correct answer?
4
The compression ratio for petrol engines is