MCQOPTIONS
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MCQOPTIONS
This section includes 832 Mcqs, each offering curated multiple-choice questions to sharpen your Automobile Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 801. |
The weight per unit volume of a liquid at a standard temperature and pressure is called |
| A. | specific weight |
| B. | mass density |
| C. | specific gravity |
| D. | none of these |
| Answer» B. mass density | |
| 802. |
In an external mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to 0.89 times the height of the liquid, above the vena contracta. |
| A. | less than |
| B. | more than |
| C. | - |
| D. | - |
| Answer» B. more than | |
| 803. |
The power transmitted through a pipe is (where w = Specific weight in N/m 3 , and Q = Discharge in m 3 /s) |
| A. | w x Q x H |
| B. | w x Q x h f |
| C. | w x Q ( H - h f ) |
| D. | w x Q ( H + h f ) |
| Answer» D. w x Q ( H + h f ) | |
| 804. |
The pressure measured with the help of a piezometer tube is in |
| A. | N/mm 2 |
| B. | N/m 2 |
| C. | head of liquid |
| D. | all of these |
| Answer» D. all of these | |
| 805. |
The body will sink down if the force of buoyancy is __________ the weight of the liquid displaced. |
| A. | equal to |
| B. | less than |
| C. | more than |
| D. | - |
| Answer» C. more than | |
| 806. |
The loss of head due to an obstruction in a pipe is twice the loss of head at its entrance. |
| A. | Agree |
| B. | Disagree |
| C. | - |
| D. | - |
| Answer» B. Disagree | |
| 807. |
A flow in which the volume of a fluid and its density does not change during the flow is called __________ flow. |
| A. | incompressible |
| B. | compressible |
| C. | - |
| D. | - |
| Answer» B. compressible | |
| 808. |
A siphon is used to connect two reservoirs at different levels intervened by a high ridge. |
| A. | True |
| B. | False |
| C. | - |
| D. | - |
| Answer» B. False | |
| 809. |
The coefficient of discharge for an external mouthpiece is |
| A. | 0.375 |
| B. | 0.5 |
| C. | 0.707 |
| D. | 0.855 |
| Answer» E. | |
| 810. |
An ideal fluid is frictionless and incompressible. |
| A. | Correct |
| B. | Incorrect |
| C. | - |
| D. | - |
| Answer» B. Incorrect | |
| 811. |
The stability of a dam is checked for |
| A. | tension at the base |
| B. | overturning of the wall or dam |
| C. | sliding of the wall or dam |
| D. | all of these |
| Answer» E. | |
| 812. |
The coefficient of viscosity may be determined by |
| A. | capillary tube method |
| B. | orifice type viscometer |
| C. | rotating cylinder method |
| D. | all of these |
| Answer» E. | |
| 813. |
A structure whose width is __________ the width of the channel, is called a flumed structure. |
| A. | less than |
| B. | more than |
| C. | - |
| D. | - |
| Answer» B. more than | |
| 814. |
The maximum efficiency of transmission through a pipe is |
| A. | 50% |
| B. | 56.7% |
| C. | 66.67% |
| D. | 76.66% |
| Answer» D. 76.66% | |
| 815. |
The pressure less than atmospheric pressure is known as |
| A. | suction pressure |
| B. | vacuum pressure |
| C. | negative gauge pressure |
| D. | all of these |
| Answer» E. | |
| 816. |
The loss of head due to friction in a pipe of uniform diameter in which a viscous flow is taking place, is (where R N = Reynold number) |
| A. | 1/ R N |
| B. | 4/ R N |
| C. | 16/ R N |
| D. | 64/ R N |
| Answer» D. 64/ R N | |
| 817. |
In a venturimeter, the velocity of liquid at throat is __________ than at inlet. |
| A. | higher |
| B. | lower |
| C. | - |
| D. | - |
| Answer» B. lower | |
| 818. |
The maximum discharge over a broad crested weir is |
| A. | 0.384 C d x L x H 1/2 |
| B. | 0.384 C d x L x H 3/2 |
| C. | 1.71 C d x L x H 1/2 |
| D. | 1.71 C d x L x H 3/2 |
| Answer» E. | |
| 819. |
The discharge through a siphon spillway is |
| A. | C d x a 2 gH |
| B. | C d x a 2 g x H 3/2 |
| C. | C d x a 2 g x H 2 |
| D. | C d x a 2 g x H 5/2 |
| Answer» B. C d x a 2 g x H 3/2 | |
| 820. |
The discharge through a large rectangular orifice is given by (where H 1 = Height of the liquid above the top of the orifice, H 2 = Height of the liquid above the bottom of the orifice, b = Breadth of the orifice, and C d = Coefficient of discharge) |
| A. | Q = C d x b 2 g ( H 2 - H 1 ) |
| B. | Q = C d x b 2 g ( H 2 1/2 - H 1 1/2 ) |
| C. | Q = C d x b 2 g ( H 2 3/2 - H 1 3/2 ) |
| D. | Q = C d x b 2 g ( H 2 2 - H 1 2 ) |
| Answer» D. Q = C d x b 2 g ( H 2 2 - H 1 2 ) | |
| 821. |
In order to measure the flow with a venturimeter, it is installed in |
| A. | horizontal line |
| B. | inclined line with flow upwards |
| C. | inclined line with flow downwards |
| D. | any direction and in any location |
| Answer» E. | |
| 822. |
Coefficient of resistance is the ratio of |
| A. | actual velocity of jet at vena contracta to the theoretical velocity |
| B. | area of jet at vena contracta to the area of orifice |
| C. | loss of head in the orifice to the head of water available at the exit of the orifice |
| D. | actual discharge through an orifice to the dieoretical discharge |
| Answer» D. actual discharge through an orifice to the dieoretical discharge | |
| 823. |
According to equation of continuity, |
| A. | w 1 a 1 = w 2 a 2 |
| B. | w 1 v 1 = w 2 v 2 |
| C. | a 1 v 1 = a 2 v 2 |
| D. | a 1 / v 1 = a 2 / v 2 |
| Answer» D. a 1 / v 1 = a 2 / v 2 | |
| 824. |
When a tube of smaller diameter is dipped in water, the water rises in the tube due to viscosity of water. |
| A. | True |
| B. | False |
| C. | - |
| D. | - |
| Answer» C. - | |
| 825. |
In a free nappe, |
| A. | the pressure below the nappe is atmospheric |
| B. | the pressure below the nappe is negative |
| C. | the pressure above the nappe is atmospheric |
| D. | the pressure above the nappe is negative |
| Answer» B. the pressure below the nappe is negative | |
| 826. |
Coefficient of contraction is the ratio of |
| A. | actual velocity of jet at vena contracta to the theoretical velocity |
| B. | loss of head in the orifice to the head of water available at the exit of the orifice |
| C. | actual discharge through an orifice to the theoretical discharge |
| D. | area of jet at vena contracta to the area of orifice |
| Answer» E. | |
| 827. |
An error of 1% in measuring head over the apex of the notch ( H ) will produce an error of __________ in discharge over a triangular notch. |
| A. | 1% |
| B. | 1.5% |
| C. | 2% |
| D. | 2.5% |
| Answer» E. | |
| 828. |
A weir is said to be broad crested weir, if the width of the crest of the weir is __________ half the height of water above the weir crest. |
| A. | equal to. |
| B. | less than |
| C. | more than |
| D. | - |
| Answer» D. - | |
| 829. |
The discharge over a right angled notch is (where H = Height of liquid above the apex of notch) |
| A. | C d 2 g x H |
| B. | C d 2 g x H 3/2 |
| C. | C d 2 g x H 2 |
| D. | C d 2 g x H 5/2 |
| Answer» E. | |
| 830. |
The kinematic viscosity is the |
| A. | ratio of absolute viscosity to the density of the liquid |
| B. | ratio of density of the liquid to the absolute viscosity |
| C. | product of absolute viscosity and density of the liquid |
| D. | product of absolute viscosity and mass of the liquid |
| Answer» B. ratio of density of the liquid to the absolute viscosity | |
| 831. |
In a depressed nappe |
| A. | the pressure below the nappe is atmospheric |
| B. | the pressure below the nappe is negative |
| C. | the pressure above the nappe is atmospheric |
| D. | the pressure above the nappe is negative |
| Answer» C. the pressure above the nappe is atmospheric | |
| 832. |
One litre of water occupies a volume of |
| A. | 100 cm 3 |
| B. | 250 cm 3 |
| C. | 500 cm 3 |
| D. | 1000 cm 3 |
| Answer» E. | |