Work Transfer MCQs : This section focuses on the "Work Transfer". These Multiple Choice Questions (MCQs) should be practiced to improve the Work Transfer skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
Question 1
A 1200 hp engine has a drive shaft rotating at 2000 RPM. Find the torque on the shaft?
A. 2214 Nm
B. 3214 Nm
C. 4214 Nm
D. 5214 Nm
Question 2
A battery is well insulated while being charged by 12.3 V at a current of 6 A. Take the battery as a control mass and find the instantaneous rate of work.
A. 63.8 W
B. 73.8 W
C. 83.8 W
D. 93.8 W
Question 3
A crane lifts a bucket of cement with a mass of 450 kg vertically up with a constant velocity of 2 m/s. Find the rate of work.
A. 8.83 kW
B. 8.33 kW
C. 8.53 kW
D. 8.63 kW
Question 4
A current of 10 amp runs through a resistor with resistance of 15 ohms. Find the rate of work that heats the resistor up.
A. 1200 W
B. 1300 W
C. 1400 W
D. 1500 W
Question 5
An escalator raises a 100 kg bucket of sand 10 m in a minute. Determine the rate of work done during the process.
A. 143 W
B. 153 W
C. 163 W
D. 173 W
Question 6
Constant pressure process is also known as
A. isopiestic process
B. isobaric process
C. all of the mentioned
D. none of the mentioned
Question 7
Cyclic integral of a property is always
A. zero
B. one
C. infinite value
D. none of the mentioned
Question 8
Flow work is analogous to
A. shaft work
B. electrical work
C. stirring work
D. displacement work
Question 9
In a thermally insulated kitchen, a refrigerator with 2 kW motor for running the compressor provides 6000 kJ of cooling to the refrigerated space during 30 min operation. If the condenser coil placed behind the refrigerator rejects 8000 kJ of heat to the kitchen during the same period, calculate the change in internal energy of the kitchen.
A. 3600 kJ
B. 2400 kJ
C. 4800 kJ
D. none of the mentioned
Question 10
In the equation dV=(1/p)dW, (1/p) is known as
A. volume factor
B. pressure factor
C. differential factor
D. integration factor
Question 11
Shaft uses which kind of motion to do work?
A. vertical motion
B. horizontal motion
C. rotational motion
D. none of the mentioned
Question 12
Shaft work is given by
A. T*ω
B. T*dθ
C. T*τ
D. none of the mentioned
Question 13
The current flow, I, in amperes, is given by I=(dC)/(dτ)
A. dC is the charge crossing a boundary
B. time taken is dτ
C. c is the charge in coulombs and t is time in seconds
D. all of the mentioned
Question 14
The differentials of point functions are
A. perfect differentials
B. exact differentials
C. all of the mentioned
D. none of the mentioned
Question 15
The flow work is significant only in
A. flow process
B. open system
C. flow process & open system
D. none of the mentioned
Question 16
The infinitesimal amount of work done on changing the length of a wire with tension T from L to L+dL is
A. #NAME?
B. FdL
C. -2FdL
D. 2FdL
Question 17
The magnitude of mechanical work is the
A. product of the force and distance travelled perpendicular to the force
B. product of the force and distance travelled parallel to the force
C. sum of the force and distance travelled perpendicular to the force
D. sum of the force and distance travelled parallel to the force
Question 18
The surface tension acts to make the surface area of the liquid
A. maximum
B. minimum
C. zero
D. none of the mentioned
Question 19
The work done per unit volume on a magnetic material is dW=-Hdl where H is
A. field strength
B. magnetization field
C. induced current
D. none of the mentioned
Question 20
The work is equal to the integral of the product of an intensive property.
A. TRUE
B. FALSE
Question 21
Thermodynamic properties are
A. point function
B. path function
C. depends on the state
D. none of the mentioned
Question 22
Work done by a system is taken to be
A. positive
B. negative
C. zero
D. varies according to situation
Question 23
Work done in a quasi-static process
A. depends on the path followed
B. independent of the path followed
C. depends only on the initial and final states
D. none of the mentioned
Question 24
Work done in stretching a wire is given by
A. #NAME?
B. #NAME?
C. #NAME?
D. all of the mentioned
Question 25
Work done on a system is taken to be
A. positive
B. negative
C. zero
D. varies according to situation
Question 26
Work is a
A. point function
B. path function
C. depends on the state
D. none of the mentioned