Bissoy.com
Doctors Medicines MCQs Q&A

Which of the following drilling machines is used for the purpose of drilling several holes simultaneously?

Which of the following drilling machines is used for the purpose of drilling several holes simultaneously? Correct Answer Multi-spindle drilling machine

Explanation:

Multiple spindle head drilling machine

  • The multiple spindle head drilling machine may have any number of spindles - from 4 to 48 or more, all driven from the one-spindle drive gear in one head.
  • The multiple spindle head drilling machine is specially designed for mass production operations such as drilling, reaming or tapping many holes at one time in a specific unit of work such as an automobile engine block.
  • There may be two or more drill heads on one machine, each with many spindles.
  • This is necessary when holes are drilled from more than one direction - for example, on the top side, and the end of a piece of work.
  • Production units of this type are seldom used in a tool room that usually does highly skilled work.

[ alt="F2 Krupalu 08-11-21 Savita D3" src="//storage.googleapis.com/tb-img/production/21/11/F2_Krupalu_08-11-21_Savita_D3.png" style="width: 242px; height: 528px;">

Portable hand drills

  • Portable hand drills of different types are used for certain jobs which cannot be handled on stationary drilling machines.
  • The electric hand drill has a small electric motor for driving the drill. At the end of the spindle, a drill chuck is mounted. 
  • It is very commonly used for drilling holes in such components that cannot be transported to the shop due to their size or weight.
  • It is used for light duty with a usually single speed.

[ alt="Electric drill" height="226" src="//storage.googleapis.com/tb-img/production/18/11/Electric%20drill.PNG" width="242">

Related Questions

Study the table and answer the question that follows: In the given table, production of five different types of machines (A, B, C, D, E) in the years from 2016 to 2020 (in thousands) is given. Machines Years 2016 2017 2018 2019 2020 A 46 53 56 58 67 B 50 65 67 66 72 C 43 54 55 47 51 D 47 52 61 65 74 E 48 58 63 64 67 What is the ratio of the total production of type A machines in 2018 and type E machines in 2019 to the total production of type C and type D machines in 2016?
In the following question, there are six sentences marked S1, S6, P, Q, R and S. The position of S1 and S6 are fixed. Choose one of the four options given below which would be the most logical sequence of the sentences in the passage. S1.We do not know how to manage our machines.  P. The machines are very stern masters. Q. They must be fed with coal, and given petrol to drink, and oil to wash with, and must be kept at the right temperature. R. Machines were made to be man's servants, yet he has grown so dependent on them that they are in a fair way to become his masters.  S. Already most men spend most of their lives looking after and waiting upon machines.  S6. If they do not get their meals when they expect them, they grow sulky and refuse to work.
Three statements are followed by three conclusions numbered I, Il and Ill. Assuming the statements to be true even if they do not conform to real-world knowledge, decide which of the conclusions logically follows/follow from the statements. Statements: 1. All watches are clocks. 2. Some clocks are machines. 3. Some machines are gadgets. Conclusions: I. Some watches are machines. Il. Some machines are clocks. Ill. Some gadgets being clocks is a possibility.
Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements. Statements: All computers are machines. No television is a computer. All televisions are instruments. Conclusions: I. Some instruments are machines. Il. Some machines are computers. III. Some televisions are machines.
Two statements are given followed by three conclusions numbered I, II and III. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements. Comments: All rulers are machines. Some machines are costly items. Conclusions: I. Some rulers are costly items. II. Some costly items are machines. III. All costly items are machines.
The question below consists of a set of labelled sentences is given. Out of the four options given, select the most logical order of the sentences to form a coherent paragraph. P- After industrial revolution man has developed and progressed rapidly.  Q- From simple calculations to mass production of things – everything we need in today’s fast-paced life is assisted by machines. R- While the man is the inventor of machines, he is also highly dependent on the machines. S- Machines and modern technology have given him comfort, facilities and leisure in life.
Read the passage carefully and choose the best answer to each question out of the four alternatives and click the button corresponding to it.
Modern civilization is completely dependent on energy, which has therefore to be abundant and also economical. About 85% of the world's energy is supplied by oil, coal and natural gas while nuclear, hydro, wind and solar power and biomass supply the rest. Coal, nuclear and hydro are used primarily to generate electricity while natural gas is widely used for heating. Biomass is used both for heating and cooking. The wind and solar power is the future's hope as they are sustainable energy sources. Oil powers almost all machines that move and that makes oil uniquely versatile. Oil powered airplanes carry 500 people across the widest oceans at nearly the speed of sound. Oil powered machines produce and transport food. Oil powered machines are ubiquitous. Clearly, we live in the age of oil but it is drawing to a close. According to data available if oil production remains constant until it's gone, there is enough to last 42 years. Oil wells will produce less as they become depleted, which will make it impossible to keep production constant. Similarly natural gas and coal will last another 61 years and 133 years respectively. Naturally, as they become scarce, they become expensive, leading to a worldwide energy crisis. If we are to survive on this planet, we have to make a transition to sustainable energy sources. The transition may be willy-nilly or planned - the choice is ours. The dawning era of limited and expensive energy will be very difficult for everyone on earth but will be even more difficult if it is not anticipated. It is of utmost importance that the public and policymakers understand the global energy crisis and act in tandem to ensure that the species 'homo sapiens' does not become extinct. Biomass is an energy source used in
In a punching press, the requirement is to punch 40 mm diameter holes in a plate having a thickness of 15 mm. The rate at which the holes should be punched is 30 holes/min. Energy requirement is of 6 N-m per mm2 of sheared area. If the punching takes time 1/10 of a second and the speed of the flywheel varies from 160 to 140 rpm, determine the mass of the flywheel having radius of gyration of 1 m.
The correct statements are A. We can not see a bird’s ears. A bird has tiny holes on both sides of its head. B. Generally, the holes are covered with feathers. C. You will see tiny holes on a lizard’s head. These are its ears. D. A crocodile also has ears like this, but we can not see them easily. 
Circular areas of same size have been marked to drill holes in a road. If the radius of one of the holes to be drilled is 21cm, and there are 10 holes to be drilled along the road, what is the total area in sq.cm of all the 10 circles marked to be drilled? (π = 22 / 7)